2021/12/30 更新

写真a

ヒラキ エイジ
平木 英治
HIRAKI Eiji
所属
自然科学学域 教授
職名
教授
外部リンク

学位

  • 博士(工学) ( 2004年3月   大阪大学 )

  • 博士(工学),第18898号 ( 2004年3月   大阪大学 )

研究キーワード

  • 電気機器

  • パワーエレクトロニクス

  • エネルギーエレクトロニクス

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 電力工学

学歴

  • 大阪大学   Graduate School of Engineering Science  

    1988年4月 - 1990年3月

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  • 大阪大学   Faculty of ENGINEERING SCIENCE  

    1984年4月 - 1988年3月

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経歴

  • 山口大学   大学院 理工学研究科   准教授

    2006年4月 - 2013年9月

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  • 山口大学   工学部   電気電子工学科

    1995年12月 - 2006年3月

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  • マツダ株式会社   技術研究所

    1990年4月 - 1995年12月

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所属学協会

  • IEEE

    1996年4月 - 現在

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  • パワーエレクトロニクス学会

    1995年7月 - 現在

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  • 電気学会

    1995年7月 - 現在

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  • 電子情報通信学会

    1995年7月 - 2011年7月

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論文

  • Analytical Formulation of Copper Loss of Litz Wire With Multiple Levels of Twisting Using Measurable Parameters

    Kazuhiro Umetani, Shota Kawahara, Jesus Acero, Hector Sarnago, Oscar Lucia, Eiji Hiraki

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   57 ( 3 )   2407 - 2420   2021年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Litz wire has been widely utilized in power transformers and inductors as a wire with low copper loss at high-frequency operation. The Litz wire is commonly made of many thin isolated strands twisted in multiple levels. Due to its complicated structure, the copper loss prediction of the Litz wire has been difficult, hindering the design optimization of the Litz wire structure. To overcome this difficulty, preceding studies have investigated the analytical copper loss models of the constituting elements of the Litz wire, i.e., the strands and the bundles of strands. The purpose of this article is to propose an analytical copper loss model of the Litz wire by utilizing these preceding knowledge. The proposed model is formulated only with parameters that can be measured by basic testing instruments. Besides, the proposed model considers the bundle structure of the Litz wire, which affects the local ac current distribution, and the twisting pitch, which causes the inclination of the Litz wire strands. The proposed model was tested by comparing the analytical prediction and experimental measurements of the ac resistance of commercially available Litz wires. As a result, the predicted ac resistance showed good agreement with the measured ac resistance, suggesting the appropriateness of the proposed model.

    DOI: 10.1109/TIA.2021.3063993

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  • Industrial Electronics Education: Past, Present, and Future Perspectives

    Oscar Lucia, Joao Martins, Yousef Ibrahim, Kazuhiro Umetani, Luis Gomes, Eiji Hiraki, Houcine Zeroug, Milos Manic

    IEEE INDUSTRIAL ELECTRONICS MAGAZINE   15 ( 1 )   140 - 154   2021年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Industrial electronics (IE) covers a wide range of technologies and applications, being a key enabling technology for numerous industrial, domestic, and biomedical uses, among others. In this context, IE education has become a relevant and challenging topic for society and industry. This article covers its evolution and state-of-the-art methodologies and provides an overall view of its status around the world. Finally, future trends and challenges in IE education are discussed.

    DOI: 10.1109/MIE.2020.3002488

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  • 力率に基づく共振型コンバータの新しい制御法の提案 (半導体電力変換/モータドライブ合同研究会・半導体電力変換一般・モータドライブ一般)

    霜村 光太, 梅谷 和弘, 川上 太知, 平木 英治

    電気学会研究会資料. MD   2021 ( 45 )   19 - 24   2021年1月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • 加熱動作時のIHシステムから加熱コイルのみの交流抵抗を抽出する計測法 (半導体電力変換/モータドライブ合同研究会・半導体電力変換一般・モータドライブ一般)

    三島 知浩, 川原 翔太, 梅谷 和弘, 平木 英治

    電気学会研究会資料. SPC = The papers of technical meeting on semiconductor power converter, IEE Japan   2021 ( 1 )   37 - 42   2021年1月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • Feasibility of Sinusoidal Flux Drive Design of Reluctance Motor for Reducing Torque and Input Current Ripples with Three-Leg Inverter

    Masaki Iida, Takayuki Kusumi, Kazuhiro Umetani, Eiji Hiraki

    2021 IEEE 19TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (PEMC)   439 - 446   2021年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Reluctance motors, represented by the switched reluctance motor (SRM) and the synchronous reluctance motor (SynRM), are attractive for vehicle propulsion owing to their high thermal tolerance and simple mechanical construction. However, the SRM exhibits large torque and large input current ripples, deteriorating driving comfort and battery lifespan. Furthermore, a driving system of the SRM requires the special inverter topology with additional switching or rectifying devices, leading to the cost-up. Meanwhile, the SynRM does not have these drawbacks, although this motor tends to be difficult to cover the wide range of the torque and the rotation speed required for vehicle propulsion because of large phase flux induction. To solve the obstacles of these conventional reluctance motors, this paper proposes a novel reluctance motor. The proposed reluctance motor is based on magnetization by the sinusoidal phase flux waveform, whereby the torque and input current ripples are eliminated using a common three-leg inverter without inducing large phase magnetic flux. This paper presents the operating principles of the proposed reluctance motor as well as analysis and simulation results in comparison with the SRM and the SynRM. As a result, the proposed reluctance motor is elucidated to reduce the torque and input current ripples with the three-leg inverter. Furthermore, the proposed reluctance motor can improve the torque range and rotating speed range compared to the SynRM because of the sinusoidal flux waveform with reduced amplitude. These results imply feasibility of the proposed motor for vehicle propulsion.

    DOI: 10.1109/PEMC48073.2021.9432579

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  • 高周波トランスの寄生容量設計

    小林皓祐, 平木英治, 福本佳樹, 池成達也, 河野真吾

    電気学会全国大会講演論文集(CD-ROM)   2021   2021年

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  • 非接触給電の送電器間の磁気干渉に依らずZVS可能な位相シフト型送電器制御システム

    松浦晃大, 石原將貴, 小西晃央, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2021   2021年

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  • Phase-current waveform for switched reluctance motors to eliminate input-current ripple and torque ripple in low-power propulsion below magnetic saturation

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    IET POWER ELECTRONICS   13 ( 15 )   3351 - 3359   2020年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ENGINEERING TECHNOLOGY-IET  

    In recent decades, switched reluctance motors (SRMs) have been attracting increasing attention as a promising type of traction motors for electric vehicle propulsion, owing to their robust construction, elimination of permanent magnets. However, their phase inductance profile contains significant high-order harmonics, which generates input-current and torque ripples under SRM drive with the conventional square phase-current waveform. This study solves this problem by proposing a novel phase-current waveform in replacement of this square waveform. The proposed waveform is a predetermined waveform that can be stored as a look-up table in the inverter controller and can be magnified or attenuated to adjust the output torque, similarly as the conventional square waveform. Certainly, SRMs generally exhibit magnetic non-linearity due to magnetic saturation, which complicates the analysis. Therefore, the proposed waveform is analytically derived under the assumption that the magnetisation of the motor remains below the saturation level because vehicle propulsion tends to require a torque output far smaller than the maximum rating of the motor in normal vehicle travel. The proposed phase-current waveform is experimentally tested in comparison with the conventional square phase-current waveform. Consequently, the proposed waveform revealed smaller ripples in both the input-current and torque, supporting the effectiveness of the proposed phase-current waveform.

    DOI: 10.1049/iet-pel.2019.1207

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  • Simultaneous Tuning of Rotor Shape and Phase Current of Switched Reluctance Motors for Eliminating Input Current and Torque Ripples With Reduced Copper Loss

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   56 ( 6 )   6384 - 6398   2020年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Switched reluctance motor (SRM) is recently emerging as a cost-effective but mechanically and thermally robust motor for vehicle propulsion. However, the conventional driving method of the SRM causes a large input current and torque ripples, both of which are scarcely acceptable for vehicle application. Recently, a promising driving method has been proposed that tunes the phase current to eliminate the input current and torque ripples simultaneously, although this method suffers from large copper loss when applied to the normal SRMs. To solve this problem, this article proposes simultaneous tuning of the rotor shape in combination with the recently proposed driving method, which includes only tuning of the phase current. Tuning of the rotor shape is targeted at minimizing the copper loss. Meanwhile, the stator structure is the same as the normal SRM design. The proposed approach was revealed to reduce the effective value of the phase current by 18% in simulation and by 23% in experiment compared with the recently proposed driving method, without increasing the input current and torque ripples. This result suggests the effectiveness of tuning both the rotor shape and the phase current for applying SRMs to vehicle propulsion.

    DOI: 10.1109/TIA.2020.3015446

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  • Strategy of Topology Selection Based on Quasi-Duality Between Series-Series and Series-Parallel Topologies of Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    IEEE TRANSACTIONS ON POWER ELECTRONICS   35 ( 7 )   6785 - 6798   2020年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Series-series (SS) and series-parallel (SP) topologies are widely used in resonant inductive coupling wireless power transfer systems for various applications. However, the selection of an appropriate topology to achieve higher output power or higher efficiency is typically difficult because design optimization of the circuit parameters (e.g., characteristic impedance, load resistance, and mutual inductance) for each topology is generally separately discussed using different equivalent circuits with multiple resonance modes. Therefore, the purpose of this study involves proposing a simple strategy to select an appropriate topology. The proposed strategy is based on quasi-duality between the SS and SP topologies that are elucidated from the novel equivalent circuits derived using Lagrangian dynamics. Based on the quasi-duality, the output power and efficiency of the SP topology are calculated via the equivalent circuit of SS topology. Thus, the quasi-duality offers a simple comparison between the SS and SP topologies. The proposed strategy selects an appropriate topology by comparing only the equivalent ac load resistance, which is the ac resistance including the rectifying circuit and the load resistance, the characteristic impedance, and the ac load resistance that achieves the maximum efficiency ormaximum output power of the SS topology. Experiments verify the appropriateness and effectiveness of the proposed strategy.

    DOI: 10.1109/TPEL.2019.2956732

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  • Effects of Secondary Leakage Inductance on the LLC Resonant Converter

    Mostafa Noah, Tomohide Shirakawa, Kazuhiro Umetani, Jun Imaoka, Masayoshi Yamamoto, Eiji Hiraki

    IEEE TRANSACTIONS ON POWER ELECTRONICS   35 ( 1 )   835 - 852   2020年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    It is quite often to utilize the transformer leakage inductance in the resonant tank of the LLC resonant converter to allow for a drastic reduction in the converter cost, weight, size, and volume. The effects of the secondary leakage inductance on the operation of the LLC resonant converter are not well discussed in the relevant literature, and it is the purpose of this paper to give an insight into these effects. The contribution of this paper lies in the following: first, highlighting that it is not always an accurate assumption to consider that the values of the primary and secondary leakage inductance are identical, specifically in asymmetric magnetic core structures. Second, it has been disclosed that the well-known coupling factor (k(12)) cannot properly express the unequalized leakage inductance distribution in the proposed asymmetric transformer. Therefore, the authors bring the primary coupling factor (k(1)) and secondary coupling factor (k(2)) into practice to appropriately express the unequalized leakage distribution on the primary and secondary windings, which can be controlled by the allocation of the relevant winding with respect to the air gap, utilizing the noise absorber, and changing the distance between the winding. Several transformer prototypes had been built and experimentally tested to validate these hypotheses. Third, it has been observed that the transformer voltage gain and efficiency can be improved when the transformer leakage inductance is concentrated on the secondary side to avoid the voltage drop inflicted by the relatively large value of the magnetizing current (i(m)), especially at the light load condition. Fourth, it has been reported that in a transformer structure with a concentrated value of leakage on the secondary side would decrease the resonant tank input impedance, vertically widen the voltage-gain curve of the converter, and eventually increase the frequency control bandwidth with respect to the load variation. Transformer prototypes had been constructed and tested in a 390 V/12 V-220 W LLC resonant converter to evaluate the proposed analysis.

    DOI: 10.1109/TPEL.2019.2911093

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  • Competition-Based Learning of Power Converter Design Emulating Product Development Activity

    Kazuhiro Umetani, Eiji Hiraki

    IECON 2020: THE 46TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   3339 - 3344   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Power conversion technology is characterized by the comparatively small variation of circuit topologies. Because product competitiveness mainly lies in the performance quality as efficiency and low noise emission, the professional skills of this technology commonly require the ability to improve the quality under the restriction of the space, the material resource, and the cost. The conventional teaching method of the power conversion technology is mainly based on the lecture classes and the hands-on classes, which teach the fixed knowledge of the circuit operation. Therefore, this conventional method tends to be insufficient to cover the various practical strategies to improve the quality. To overcome this difficulty, this paper proposes application of the competition-based learning (CBL), in which teams of the students design their power converters and compete on the efficiency. For many professional engineers, competition among companies is the basic motivation to think of strategies to improve product competitiveness. Therefore, the CBL may be effective for teaching design strategies. For promotion of sharing the know-how, the proposed teaching method introduces the events, in which each team share its design strategies with other teams and improve its design based on the know-hows of other teams These events emulate the economic activity, in which a company investigates its competitors' products to extract the know-how. Along with the basic methodology of the proposed teaching method, this paper also reports the experience of a teaching course.

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  • Secondary-Side Center-Tapped Transformer Structure with One-Turn Secondary Coils Integrating Rectifier for Reducing Copper Loss of Forward Converter

    Tomohide Shirakawa, Kazuhiro Umetani, Eiji Hiraki, Wilmar Martinez

    2020 IEEE 29TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE)   1459 - 1465   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Secondary-side center-tapped transformer is a common transformer design of the high step-down forward converters owing to its effective reduction of the copper loss. Particularly, the extremely high step-down converters tend to have one-turn secondary coils to increase the winding turn ratio. However, due to the proximity effect in the terminal and the wire connecting the secondary coils and the rectifier, this design tends to suffer from significant deterioration of the copper loss reduction effect. To mitigate this problem, this paper proposes a novel transformer's secondary-side structure that integrates the one-turn secondary coils and the rectifier. The proposed transformer structure can mitigate the proximity effect in the secondary coils and the rectifier, thus suppressing the local concentration of the current distribution. Experiments revealed effective reduction of the copper loss, supporting the effectiveness of the proposed structure.

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  • Optimization of Common Source Inductance and Gate-Drain Capacitance for Reducing Gate Voltage Fluctuation after Turn-off Transition

    Yusuke Hatakenaka, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki

    2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   3155 - 3162   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Next-generation switching devices as GaN-FETs are recently emerging as promising switching devices capable of extremely high-speed switching. High-speed switching enables the high-frequency operation of the power converters, which can reduce the size of the passive components. However, highspeed switching can induce the resonance between the parasitic capacitance of the switching device and the parasitic inductance of the circuit board wiring, which appears as the gate voltage fluctuation at the switching. Particularly, GaN-FETs tend to have comparatively low gate threshold voltage and therefore are susceptible to the false turn-on, which is caused by the gate voltage fluctuation in the switching device just after the turn-off transition. For preventing this phenomenon, this paper analytically investigates the design requirement of these parasitic parameters to reduce the gate voltage fluctuation after the turn-off transition. As a result, the optimal ratio of the gate-drain capacitance and the common source inductance is elucidated to be the key to minimize the gate voltage fluctuation. The simulation and the experiment supported that the optimal design of this ratio can reduce the gate voltage fluctuation, supporting the usefulness of this novel insight for preventing the false turn-on.

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  • 磁気結合の変動を自動補償する中継共振器型6.78MHz磁界結合型ワイヤレス給電システム

    藤木啓太, 小西晃央, 三島知浩, 石原將貴, 梅谷和弘, 平木英治

    電気学会全国大会講演論文集(CD-ROM)   2020   2020年

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  • フラクタル的フィン形状を有する新規ヒートシンク構造による放熱性能向上効果の検証

    池上翔悟, 梅谷和弘, 平木英治, 酒井敏, 東野智

    電気学会全国大会講演論文集(CD-ROM)   2020   2020年

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  • 複数の送電器間に生じる相互干渉を簡易な制御で自動補償可能な磁界結合型ワイヤレス給電システム

    松浦晃大, 石原將貴, 小西晃央, 梅谷和弘, 平木英治

    電子情報通信学会技術研究報告(Web)   120 ( 61(WPT2020 11-14) )   2020年

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  • Analysis and Prediction of AC Resistance of Litz Wire with Rectangular Cross-Section

    Shota Kawahara, Kazuhiro Umetani, Eiji Hiraki

    2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   3273 - 3279   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The Litz wire is widely utilized in recent high frequency switching regulators as a magnetic wire with small AC resistance. The AC resistance of the Litz wire is dependent on the twisting structure of the strands as well as the resultant cross-section geometry of the Litz wire. Therefore, optimization of the Litz wire is becoming important, although the numerical prediction of the AC resistance is difficult due to the complicated structure of the Litz wire. Certainly, a recent study has proposed an analytical AC resistance prediction method. However, this method cannot be applied to Litz wires with the rectangular cross-section, which is recently developed to improve the packing factor of the winding. This paper aims at extending this previous method to cover these Litz wires by partly utilizing a simple static magnetic field FEM analysis. The experiment revealed successful AC resistance prediction of the Litz wire with the rectangular cross-section.

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  • Multiple-Transmitter Achieving Load-Independent Transmitter Current and Compensation of Cross-Interference Among Transmitters for Wide Charging Area Wireless Power Transfer Systems

    Kodai Matsuura, Masataka Ishihara, Akihiro Konishi, Kazuhiro Umetani, Eiji Hiraki

    2020 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   5474 - 5481   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Recently, a resonant inductive coupling wireless power transfer (RIC-WPT) system with multiple transmitters is emerging as a promising power supply method for household appliances, mobile devices, and wearable devices dispersedly placed in a wide area. However, the multiple-transmitter often suffers from an unstable operation of an inverter, feeding AC current to the transmitter coil, due to the cross-interference (i.e., cross-coupling) among the transmitters. When the cross-interference occurs, the inverter may not achieve high power factor and soft switching, which damages the power density and reliability of the multiple-transmitter. Therefore, this paper proposes a multiple-transmitter, including its controller, that can compensate for the effect of the cross-interference. In the proposed multiple-transmitter, each transmitter has a simple switching circuit that can automatically cancel the induced voltage due to the cross-interference with only simple control. Furthermore, the proposed multiple-transmitter also achieves a load-independent transmitter current by the control of the input voltage of the inverter, which results in a stable magnetic field regardless of load variation. Experiments verify the effectiveness and appropriateness of the proposed multiple-transmitter.

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  • Homogenization of Current Distribution in Parallel Connection of Interleaved Winding Layers of High-Frequency Transformers by Optimizing Distance between Winding Layers

    Ryo Murata, Tomohide Shirakawa, Kazuhiro Umetani, Eiji Hiraki, Hiroto Mizutani, Takaaki Takahara, Osamu Mori

    2020 22ND EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'20 ECCE EUROPE)   2020年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The windings of high-frequency high-current transformers are required to reduce the proximity effect loss. Therefore, the Litz wire in parallel connection of interleaved winding layers is usually used as the winding of transformers. However, this can cause unbalanced AC current distribution, hindering effective reduction of the copper loss. This paper solves this problem by optimizing the distance between the winding layers based on the analytical principle called the extremum co-energy principle. The transformers used in the experiment to verify this method consists of three parallel-connected primary winding and two parallel-connected secondary winding, PQ core, thin polypropylene sheets for adjusting the distance between the winding layers. As a result, the copper loss can be recused by homogenizing the AC current distribution, and the effectiveness of this method has been clarified by experiments.

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  • 高耐圧絶縁型コンバータの絶縁トランス構造の検討

    小林 皓祐, 平木 英治

    パワーエレクトロニクス学会誌   46   115 - 115   2020年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.46.115

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  • アルミコア基板を用いた三相PWM インバータの熱設計

    秋間 雅宏, 小西 晃央, 梅谷 和弘, 平木 英治

    パワーエレクトロニクス学会誌   46   114 - 114   2020年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.46.114

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  • 2 ステージAC-DC コンバータにおけるDC リンク電圧変動抑制制御

    青木 涼, 楠見 隆行, 平木 英治, 梅谷 和弘

    パワーエレクトロニクス学会誌   46   105 - 105   2020年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.46.105

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  • 磁気結合の変動にロバストな磁界結合型ワイヤレス給電用中継共振器の実験的検証

    小西晃央, 藤木啓太, 石原將貴, 梅谷和弘, 平木英治

    電子情報通信学会技術研究報告   119 ( 364(EE2019 49-74)(Web) )   2020年

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  • 負荷変動に対してソフトスイッチングを維持するプラズマ発生器駆動用共振インバータのリアクタンス補償回路の提案

    白石達也, 梅谷和弘, 平木英治, 池成達也, 福本佳樹

    電子情報通信学会技術研究報告   119 ( 364(EE2019 49-74)(Web) )   2020年

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  • エネルギー利用の高度化に対応する最新の高周波電力変換回路技術

    勝嶋肇, 橘秀久, 川端龍哉, 安部征哉, 石川裕記, 入江寿一, 宇敷修一, 江口政樹, 大森英樹, 笠展幸, 木船弘康, 栗尾信広, 近藤亮太, 斉藤亮治, 佐藤宣夫, 庄司浩幸, 谷口勝則, 玉田俊介, 津野眞仁, 弦田幸憲, 寺園勝志, 中岡睦雄, 西村和則, 服部将之, 早川潔, 平木英治, 平地克也, 北條昌秀, 堀恵輔, 枡川重男, 松井景樹, 三浦友史, 三島智和, 南政孝, 守屋一成, 山村直紀, 吉澤仁, 米森秀登, 高田知明

    電気学会技術報告   ( 1473 )   2020年

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  • 実用化に向けたIHクッキングヒータ用新規薄型コイルの開発 (半導体電力変換 家電・民生 自動車合同研究会 自動車など移動体および家電用パワーエレクトロニクスならびに半導体電力変換一般)

    三島 知浩, 搆口 晃希, 白川 知秀, 梅谷 和弘, 平木 英治, 黒瀬 洋一, 定方 秀樹, 藤田 篤志

    電気学会研究会資料. VT   2019 ( 26 )   71 - 76   2019年12月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • Receiving-coil structure reducing stray AC resistance for resonant coupling wireless power transfer

    Kazuhiro Umetani, Toru Honjo, Takahiro Koyama, Masataka Ishihara, Eiji Hiraki

    IET POWER ELECTRONICS   12 ( 9 )   2338 - 2344   2019年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ENGINEERING TECHNOLOGY-IET  

    Resonant inductive coupling wireless power transfer is widely known to be a possible convenient power supply method for the small mobile apparatus. However, the limited receiving-coil size tends to lower the efficiency and limit the output power owing to the small mutual inductance and comparatively large stray alternating current (AC) resistance of the receiving-coil. This study mitigates this issue by proposing a novel receiving-coil structure. This proposed structure comprises a coil and a drum core with a thin axis. The coil is wound on the axis to form a single winding layer. The proposed structure can reduce stray AC resistance by suppressing the proximity effect and reducing the wire length without deteriorating the mutual inductance significantly. Therefore, better efficiency and larger output power can be achieved. Simulations and experiments were performed to verify the proposed structure. Consequently, both simulations and experiments supported the reduction in AC resistance compared to the conventional structure. Furthermore, the experiment revealed improvements by the proposed structure in both efficiency and output power. These results support the effectiveness of the proposed structure for wireless power transfer to small mobile apparatus.

    DOI: 10.1049/iet-pel.2018.5358

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  • Prevention of Oscillatory False Triggering of GaN-FETs by Balancing Gate-Drain Capacitance and Common-Source Inductance

    Kazuhiro Umetani, Ryunosuke Matsumoto, Eiji Hiraki

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   55 ( 1 )   610 - 619   2019年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Gallium-nitride-field-effect transistors (GaN-FETs) are promising switching devices with fast switching capability. However, they commonly have low gate threshold voltage, suffering from susceptibility to the false triggering. Particularly, the oscillatory false triggering, i.e., a self-sustaining repetitive false triggering, can occur after a fast switching, which is a severe obstacle for industrial applications. The purpose of this paper is to elucidate the design instruction for preventing this phenomenon. The oscillatory false triggering is known to be caused by the parasitic oscillator circuit formed of a GaN-FET, its parasitic capacitance and the parasitic inductance of the wiring. This paper analyzed the nonoscillatory condition of this oscillator. The result revealed an appropriate ratio between the gate-drain capacitance and the common-source inductance is a key to prevent the oscillatory false triggering. Experiment successfully verified this analysis result, supporting the effectiveness of the appropriate design of this ratio for preventing the oscillatory false triggering.

    DOI: 10.1109/TIA.2018.2868272

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  • トランスの漏れインダクタンスの分布がフライバックコンバータの損失に与える影響

    中川航輔, 白川知秀, 梅谷和弘, 平木英治

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   70th   2019年

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  • Automatic Active Compensation Method of Cross-Coupling in Multiple-receiver Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Keita Fujiki, Kazuhiro Umetani, Eiji Hiraki

    2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   4584 - 4591   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The ability to charge to multiple receivers simultaneously with a single transmitter is one of the advantages of resonant inductive coupling wireless power transfer (RICWPT) technologies. However, in multiple-receiver RIC-WPT systems, each receiver often suffers from the magnetic coupling among receivers, i.e., cross-coupling. The cross-coupling not only complicates the control of the receivers but also significantly decreases the output power of each receiver. Hence, the purpose of this paper is to propose a compensation method of the influence due to the cross-coupling. To achieve this purpose, we first analyze the requirement to compensate for the influence of the cross-coupling. As a result, we reveal that it is necessary to control the phase of the current in all the receiver to be orthogonal to the phase of the transmitter current. Then, we propose the method to adjust the current phase of each receiver automatically to the desired phase by using only the phase information of the transmitter current, which results in the full compensation of the influence due to the cross-coupling. Furthermore, the proposed method also compensates for the influence of a detuning of the resonant frequency of each receiver due to the natural tolerance. Experiments of a two-receiver RIC-WPT system successfully verify the effectiveness of the proposed method.

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  • Resonant Frequency Tuning System for Repeater Resonator of Resonant Inductive Coupling Wireless Power Transfer

    Akihiro Konishi, Keita Fujiki, Kazuhiro Umetani, Eiji Hiraki

    2019 21ST EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE '19 ECCE EUROPE)   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The resonant inductive coupling wireless power transfer (RTC-WPT) is a promising technique of the wireless power transfer with comparatively large power and high efficiency. However, the performance of RTC-WPT system is generally highly dependent on the fine adjustment of the resonant frequency between the transmitter, receiver, and repeater resonators, although the natural tolerance of the capacitor and inductance of the coil may easily lead to the significant detuning of the resonant frequency. Particularly, the repeater resonator is the key item that can improve the power transfer to a distantly located receiver resonator. However, the repeater resonator tends to have a high quality-factor; and therefore, its performance can be easily deteriorated by the detuning of the resonant frequency. The purpose of this paper is to propose a simple automatic resonant frequency tuning system for the repeater resonator as a remedy for the performance deterioration due to the resonant frequency detuning. The operation of the automatic resonant frequency tuning system was experimentally tested using the prototype wireless power transfer system. The result exhibited robust power transfer capability regardless of the natural tolerance of the resonant frequency.

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  • Core Loss Modeling Based on Equivalent Circuit for Switched Reluctance Motors

    Takayuki Kusumi, Kosuke Kobayashi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    2019 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT)   1743 - 1748   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    To estimate the core loss in SRMs, core loss estimation by equivalent circuit is preferable especially in the EV development because of its simple calculation. However, previously proposed models may limit applicable operating condition. These models refer instantaneous value, whereas hysteresis loop is a key factor to estimate core loss and the hysteresis loop directly associates with the history of magnetic flux. This paper focuses on the relation between the width of hysteresis loop and the peak to peak value of magnetic flux because the relation directly expresses the core loss. Therefore, the purpose of this paper is to propose a novel core loss model for equivalent circuit which estimates core loss in SRMs. This paper refers the peak to peak value of magnetic flux linkage and electrical angle. Along with the theoretical formulation of the model, this paper presents the model construction method. As a result, the proposed model successfully estimated core loss.

    DOI: 10.1109/ICIT.2019.8754931

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  • Analytical Derivation of Phase Current Waveform Eliminating Torque Ripple and Input Current Ripple of Switched Reluctance Motors under Magnetically Saturated Operation

    Takayuki Kusumi, Kosuke Kobayashi, Kazuhiro Umetani, Eiji Hiraki

    2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   6540 - 6547   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Switched reluctance motors (SRMs) is beneficial in excellent cost-effectiveness and high thermal tolerance owing to their simple mechanical construction free from permanent magnets. Nevertheless, application of SRMs to vehicular propulsion is often hindered by their comparatively large input current ripple and torque ripple. For mitigating the problem, the previous study has proposed a phase current waveform that eliminates both of these ripples under the magnetization below the magnetic saturation. However, this previous technique still suffers from significant torque and input current ripples at large output torque, which tends to cause the magnetic saturation. This paper proposes an improved phase current waveform that eliminates these ripples even at large output torque. This waveform was derived analytically based on the nonlinear magnetic model of the SRM. The proposed phase current waveform was successfully verified by the experiment, suggesting the usefulness of the proposed technique for applying SRMs to vehicular propulsion.

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  • Experimental Verification of Impedance Matching Method for Repeater to Improve Spatial Freedom of 6.78 MHz Resonant Inductive Coupling Wireless Power Transfer Systems

    Keita Fujiki, Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    2019 21ST EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE '19 ECCE EUROPE)   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Placing a repeater, which relays the magnetic field from the transmitter to the receiver, is promising as a method to increase the spatial freedom of resonant inductive coupling wireless power transfer systems (RTC-WPT) working at 6.78MHz. However, the capability of the repeater is often affected by a frequency splitting phenomenon. When this phenomenon occurs, the resonance in the repeater becomes sufficiently small at a fixed operating frequency and make it difficult to improve the spatial freedom. To solve this problem, we apply an impedance matching method using simple switching circuits to the 6.78 RTC-WPT system with the repeater. Then we carry out experiments to verify the effectiveness of the impedance matching method. The experimental results show that the repeater improves the spatial freedom of the 6.78 MHz RTC-WPT regardless of the frequency splitting phenomenon.

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  • Simple Fully Analytical Copper Loss Model of Litz Wire Made of Strands Twisted in Multiple Levels

    Kazuhiro Umetani, Jesus Acero, Hector Sarnago, Oscar Lucia, Eiji Hiraki

    THIRTY-FOURTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2019)   1257 - 1264   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The Litz wire has been widely utilized as a wire with a low copper loss under high-frequency operation. However, design optimization of the Litz wire is difficult because this wire generally has a complicated structure of thin strands twisted in multiple levels, which hinders both of the analytical and numerical prediction of the copper loss. To overcome this issue, recent studies have proposed the analytical models of the copper loss in the bundle of twisted strands, which is the basic components constituting the Litz wire. This paper constructs a simple analytical copper loss model of the Litz wire based on these preceding insights. In addition to these insights, the proposed model further considers the effect of the inclination angle of the strands to the Litz wire on the proximity effect loss. The proposed model was tested in comparison with the experimentally measured AC resistance of commercially available Litz wires. As a result, the predicted AC resistance showed good agreement with the measured ac resistance, suggesting the effectiveness of the proposed model.

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  • Effects of Secondary Leakage Inductance on the LLC Resonant Converter-Part I: Transformer Voltage Gain and Efficiency

    Mostafa Noah, Tomohide Shirakawa, Kazuhiro Umetani, Jun Imaoka, Masayoshi Yamamoto, Eiji Hiraki

    THIRTY-FOURTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2019)   780 - 786   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Minimizing the transformer magnetizing inductance is essential for the soft switching operation of the LLC resonant converter, despite the fact that it results in higher values of magnetizing current, which deteriorates the converter efficiency. Furthermore, it is a well-known practice to utilize the transformer leakage as an inductive component in the resonant tank to improve the power destiny. This paper reveals that the transformer voltage gain can be improved when the transformer leakage inductance in concentrated on the secondary side to avoid the voltage drop inflicted by the relatively large value of the magnetizing current (i.), especially at light load condition. The theoretical discussion relies on the asymmetry of the EI core by placing the secondary winding in a close contact with the magnetic core and placing the primary winding in the vicinity of the air gap. Moreover, noise absorber had been utilized to control the leakage inductance value. The proposed transformer design maximizes the value of the secondary leakage inductance and minimizes the primary leakage inductance. Alongside with the theoretical discussion, experimental tests had been conducted to evaluate the proposed method using a 390V-12V, 220W LLC resonant converter.

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  • Effects of Secondary Leakage Inductance on the LLC Resonant Converter-Part II: Frequency Control Bandwidth with respect to Load Variation

    Mostafa Noah, Tomohide Shirakawa, Kazuhiro Umetani, Jun Imaoka, Masayoshi Yamamoto, Eiji Hiraki

    THIRTY-FOURTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2019)   1408 - 1414   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Resonant converters rely on a precise knowledge of leakage inductance of the equipped transformers. Resonant circuit topologies such as LLC usually utilize the transformer leakage as an inductive component in the resonant tank, allowing for a drastic reduction in the converter weight, size and volume. The existence of the secondary leakage inductance affects the whole operation of the LLC resonant converter. This paper reveals that placing the secondary winding near the air gap would increase the resonant tank input impedance, vertically shrink the voltage-gain curve of the converter, and consequently minimize the frequency range (i.e frequency bandwidth with respect to load variation). On contrary, placing the secondary winding in a close contact with the magnetic core would decrease the resonant tank input impedance, vertically stretches the voltage-gain curve of the converter, and widen the frequency variation range. It has been reported that the winding location with respect to the air gap has an impact on the leakage inductance value. In other words, placing the secondary winding in a close contact with the magnetic core (zero mmf position) would maximize the leakage energy storage originated from the secondary winding, and hence maximize the secondary leakage inductance and vice versa. The theoretical discussion is presented which is merely based on Ampere's law and Dowell's model. Furthermore, transformer prototypes had been constructed and tested in a 390V/12V-220W LLC converter prototype to evaluate the proposed analysis.

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  • Optimal Winding Layer Allocation for Minimizing Copper Loss of Secondary-Side Center-Tapped Forward Transformer with Parallel-Connected Secondary Windings

    Tomohide Shirakawa, Kazuhiro Umetani, Eiji Hiraki, Yuki Itoh, Takashi Hyodo

    2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   6206 - 6213   2019年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Secondary-side center-tapped transformers are widely utilized for high step-down forward DC-DC converters. For reducing the copper loss, optimization of the winding layer allocation can be a promising approach. However, the optimal allocation pattern has been difficult to be elucidated, particularly if the winding is formed of parallel-connected winding layers or carries the AC and DC current as in a center-tapped winding. This difficulty is addressed in this paper by proposing a copper loss analysis method applicable to parallel-connected winding layers and a center-tapped winding. The proposed analysis method utilizes the Dowell method in combination with the extremum co-energy principle, which has been recently proposed to analyze the current distribution in parallel-connected winding layers. As an example, this paper analyzes the center-tapped transformer each secondary winding of which is made of two parallel-connected winding layers. The optimal winding layer allocation pattern was elucidated by comparing the copper loss among six possible winding layer allocation patterns. Appropriateness of the analysis was verified by simulation, suggesting the effectiveness of the proposed method and the importance of optimizing winding layer allocation in the forward transformer design.

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  • 研究グループ紹介:岡山大学 大学院自然科学研究科 電力変換システム工学研究室

    梅谷 和弘, 七戸 希, 平木 英治

    電気学会論文誌D(産業応用部門誌)   139 ( 6 )   NL6_8 - NL6_8   2019年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    <p>Our laboratory focuses on a variety of electric power systems based on power electronics and super conductivity. Further details are found on our laboratory's Web-site (http://www.ec.okayama-u.ac.jp/~epc/).</p>

    DOI: 10.1541/ieejias.139.NL6_8

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  • 板状ワンターンコイルを採用した 高降圧中点タップ整流方式の銅損低減に関する取り組み

    白川 知秀, 梅谷 和弘, 平木 英治

    パワーエレクトロニクス学会誌   45   121 - 129   2019年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    In order to reduce copper loss, high step-down DC-DC converter often employs center-tapped rectifier. In addition, a plate shape one turn coil is utilized for transformer for making a high step-down ratio. We focused on the proximity effect in plate shape one turn coil, and investigate the cause of worsening the copper loss. In this paper, based on this investigation, we propose rectification method using winding integrated with rectifier. In addition, we discuss practical issues of the proposed method and present the solution strategy. The proposed method is verified by experiments, which suggests the effectiveness of the proposed method to high current applications.

    DOI: 10.5416/jipe.45.121

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  • 回路の実効的寄生インダクタンスとパワーデバイスの静特性を考慮したスイッチング波形の予測精度検証

    古木健悟, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2019   2019年

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  • 受電器間のクロスカップリングの影響を自動的に補償可能な複数受電器ワイヤレス給電システム

    石原將貴, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2019   2019年

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  • High-frequency Self-Driven Synchronous Rectifier Controller for WPT Systems

    Akihiro Konishi, Kazuhiro Umetani, Eiji Hiraki

    2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA)   1602 - 1609   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Resonant inductive coupling wireless power transfer (RIC-WPT) is the promising wireless power supply method to mobile applications. It is well-known that the efficiency and the power transfer capability of RIC-WPT systems deeply depend on the quality factor of the receiver-side resonator, which tends to decline by the conduction loss at rectifying diodes. Therefore, the synchronous rectification is one of the effective solutions. However, the unique characteristics of RIC-WPT, that is the weak magnetic coupling between the transmitter-side and the receiver-side resonator, tend to make the introduction of the synchronous rectification difficult. In order to address this issue, this paper newly proposes a self-driven synchronous rectifier controller suitable for RIC-WPT. This synchronous rectifier controller consists of basic analog elements and gate drivers, and no additional power supply is necessary for driving itself. In addition, the controller doesn't require any information from the transmitter-side resonator. Experiments successfully verified the operating principle as well as the efficiency improvement and clarified the usefulness of the synchronous rectifier with proposed controller for practical application of RIC-WPT.

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  • Extremum Co-Energy Principle for Analyzing AC Current Distribution in Parallel-Connected Wires of High-Frequency Power Inductors

    Tomohide Shirakawa, Genki Yamasaki, Kazuhiro Umetani, Eiji Hiraki

    IEEJ JOURNAL OF INDUSTRY APPLICATIONS   7 ( 1 )   35 - 42   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ELECTRICAL ENGINEERS JAPAN  

    Inductor winding is often comprised of parallel-connected wires to suppress copper loss. However, in high-frequency inductors, the proximity effect can cause concentrated AC current distribution, hindering the suppression of the copper loss. Therefore, optimization of the physical inductor structure requires predicting the AC current distribution caused by the proximity effect. Certainly, simulators have been commonly employed for predicting the AC current distribution. However, simple analytical methods are also required for efficient design or invention of inductor structures that have more uniform AC current distribution among the parallel-connected wires. The paper proposes a novel simple analysis method for AC current distribution in parallel-connected wires of high-frequency inductors. The proposed method is based on a novel insight that AC current is distributed to give an extremum of the magnetic co-energy contributed by the AC flux under the given total AC current. Analysis of basic inductor structures revealed that the proposed method can derive the AC current distribution by straightforward calculation. In addition, experiments supported the analysis results. Consequently, the proposed method is suggested to be promising for developing inductor structures with less copper loss.

    DOI: 10.1541/ieejjia.7.35

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  • Improved Thin Heating Coil Structure of Copper Foil Feasible for Induction Cookers

    Kazuhiro Umetani, Tomohiro Mishima, Eiji Hiraki, Takayuki Hirokawa, Makoto Imai, Hideki Sadakata

    IECON 2018 - 44TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   3503 - 3508   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Litz wire is widely utilized for heating coils of the induction cookers to suppress the proximity effect. However, low space factor of the Litz wire often significantly increases the heating coil height, which may be an obstacle of wide-spread of the induction cookers. In order to overcome this problem, a preceding study has proposed a heating coil structure of the copper foil, which suppresses the proximity effect without using the Litz wire. The preceding study has proven effective suppression of the proximity effect, when the material to be heated is placed to cover the heating coil. However, this heating coil structure still suffers from large AC resistance, when the material to be heated does not exist or partially covers the heating coil. Furthermore, the ferrite walls, installed to suppress the proximity effect, need larger height than the coil, hindering effective reduction of the total heating coil height. The purpose of this paper is to propose an improved heating coil structure. The proposed heating coil structure further incorporates a thin layer of low-permeability soft-magnetic material covering the top of the coil. This layer enables elimination of the proximity effect regardless of the existence or the disposition of the material to be heated. Furthermore, this layer enables the ferrite walls to have the same height as the coil, thus further reducing the total heating coil height. The FEM based simulation was carried out to verify the operating principle of this structure. The result supported reduction of the heating coil height and effective suppression of the AC resistance regardless of the existence and the disposition of the material to be heated.

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  • Design Optimization Method for the Load Impedance to Maximize the Output Power in Dual Transmitting Resonator Wireless Power Transfer System

    Takahiro Koyama, Kazuhiro Umetani, Eiji Hiraki

    IEEJ JOURNAL OF INDUSTRY APPLICATIONS   7 ( 1 )   49 - 55   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ELECTRICAL ENGINEERS JAPAN  

    Recently, the dual transmitting resonator wireless power transfer system (DTR-WPT) has been proposed as a promising technique for the power supply of mobile apparatus. Although this technique has been reported to be effective for increasing the output power as well as for covering a wide area during wireless power transfer, the complicated magnetic coupling among two transmitting resonators and one receiving resonator makes it difficult to develop practical design optimization methods, thus hindering practical applications of this technique. The purpose of this paper is to propose a design optimization method for the load impedance of DTR-WPT. This method is derived based on a novel simple equivalent circuit model of the DTR-WPT. The optimum impedance derived using this method as well as the appropriateness of the equivalent circuit were verified experimentally, thus validating usefulness of the proposed method for the practical application of DTR-WPT.

    DOI: 10.1541/ieejjia.7.49

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  • Theoretical Derivation of Phase Current Profile for Switched Reluctance Motors to Suppress Radial Force Ripple and Torque Ripple

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    2018 IEEE 27TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE)   1037 - 1042   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Switched reluctance motors (SRMs) are promising for propulsion motors of electric vehicles (EVs) because of their robust mechanical construction and cost effectiveness. However, practical application of SRMs to vehicular propulsion is hindered by comparatively large torque ripple and radial force ripple, which cause noise vibration and acoustic noise. Previous studies have proposed phase current profiles which suppress both ripples. However, in the derivation process of phase current, these previous studies need numerical calculation hindering the EV development speed. The purpose of this paper is to propose a novel phase current profile to suppress both the torque ripple and the radial force ripple of SRMs without numerical calculation. The profile can be straightforwardly calculated using a simple analytical model of the SRMs. In addition, the profile can be determined for any reluctance profiles of actual SRMs. Experiment was carried out to verify the proposed method. The result supported suppression of the torque ripple and the acoustic noise by the proposed method.

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  • Rotor Configuration Which Reduces Copper Loss of Switched Reluctance Motors With Suppression of Torque Ripple and Input Current Ripple

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    2018 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   6097 - 6103   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Switched reluctance motors (SRMs) are attractive motors for electric vehicle propulsion because of their cost-effectiveness or robust structures. However, SRMs suffer from input current ripple and torque ripple. The authors have proposed derivation method of phase current profile which suppresses input current ripple and torque ripple and experimentally verified the suppression of both ripples. However, the rms value of derived phase current was much greater than square wave current, which is implemented widely, and increased copper loss. For the EV application, the rms value should be reduced. To break through the issue, the author addressed the characteristic that phase current profiles are shaped based on each reluctance profile, which is shaped by motor configuration, and noticed that phase current profile with low rms value may be derived by a novel rotor configuration. Therefore, this paper proposes a novel rotor configuration which can reduce the copper loss. The proposed rotor configuration is designed to satisfy the reluctance profile which is derived by previously proposed derivation method of phase current. This paper also presents the experiment for the evaluation of the reduction of copper loss.

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  • 中国支部だより 岡山大学大学院自然科学研究科 電力変換システム工学研究室

    平木 英治

    電気設備学会誌   38 ( 12 )   746 - 747   2018年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気設備学会  

    DOI: 10.14936/ieiej.38.746

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  • Verification of the Reduction of the Copper Loss by the Thin Coil Structure for Induction Cookers

    Morimasa Hataya, Koki Kamaeguchi, Eiji Hiraki, Kazuhiro Umetani, Takayuki Hirokawa, Makoto Imai, Hideki Sadakata

    2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA)   410 - 415   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Litz wire is commonly employed as the heating coil of induction cookers. In order to realize further low cost and profile, the solid wire with simple construction and high space factor is required. However, the solid wire is may suffer from the large copper loss increased by the skin and proximity effect. Then, the previous study proposed the novel coil structure, which can suppress these effects, only by the FEM simulation. Therefore, the purpose of this paper is to verify this structure experimentally in comparison with the Litz wire coil. The result revealed that the proposed structure can have similar AC resistance and the similar height with the same surface area and the same number of turns. Moreover, the experimental result showed a possibility to further height reduction by optimization of the magnetic and winding isolation design. Consequently, the experiment supported practical effectiveness of the proposed structure for induction heating.

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  • Feasibility Study of Fractal-Fin Heat Sink for Improving Cooling Performance of Switching Power Converters

    Shogo Ikegami, Kazuhiro Umetani, Eiji Hiraki, Satoshi Sakai, Satoshi Higashino

    2018 IEEE INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC)   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Recent progress of the semiconductor switching devices enabled the high-frequency design of the switching power converters, which successfully led to the miniaturization of the circuit elements. However, the heat sink has scarcely been miniaturized during past decades. Now, the heat sinks are one of the major obstacles that hinder further size reduction of the switching power converters. Conventionally, the heat sinks are designed to have a number of flat aluminum fins extending from the aluminum base. However, these flat fins tend to make the laminar airflow passing through the fins. This laminar airflow keeps the air contacting the fin surface to remain on the surface. As a result, the fin surface is covered with the air already heated in the upstream and the fresh open air is prevented from contacting with the fin surface, thus deteriorating the cooling performance of the heat sinks. To overcome this issue, this paper proposes a heat sink structure with a novel fin geometry. The proposed fin geometry incorporates two sizes of the louvers, which are disposed to form a fractal-like pattern. These louvers are intended to break the laminar flow on the fin surface, thus promoting the mixing of the air to improve the cooling performance. FEM simulation of the heat transfer was carried out to verify this concept. The result showed improvement in the heat transfer coefficient, implying the effectiveness of the proposed structure for miniaturization of the heat sink.

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  • Automatic Resonance Frequency Tuning Method for Repeater in Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA)   1610 - 1616   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Intermediate resonator (repeater) in resonant inductive coupling wireless power transfer (RIC-WPT) systems can increase the transmission distance between the transmitting and receiving coils. The induced current in the repeater is easily affected by the frequency splitting phenomenon because the quality factor (Q-factor) of the repeater is generally as high as several hundreds. If this phenomenon occurs, induction of large current is often difficult in the repeater because the one peak characteristic of the induced current is no longer expected and the single peak of resonance splits into multiple peaks which shift the resonant frequency corresponding to the circuit parameters. In this paper, we approach this difficulty by applying an auxiliary circuit to the RIC-WPT system with the repeater. As a result, under the fixed operating frequency, the induced current in the repeater can be kept large even if the frequency splitting phenomenon occurs. The effectiveness of proposed system was supported by the simulation and experiment.

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  • 学界情報 国際会議レポート:International Telecommunications Energy Conference 2017 (INTELEC 2017), October 22-26, 2017, Gold Coast, Australia

    平木 英治

    電気学会論文誌. D, 産業応用部門誌   138 ( 4 )   NL4_9 - NL4_9   2018年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    DOI: 10.1541/ieejias.138.NL4_9

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  • 中国支部における最近の活動状況

    平木 英治

    電気学会誌   138 ( 8 )   557 - 557   2018年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    <p>はじめに</p><p>2018年4月25日(水)に,中国支部新旧役員会および活動報告会が開催され,2017年度の支部活動を総括した。これを受けて,本稿では,中国支部の最近の活動状況を紹介する。</p>

    DOI: 10.1541/ieejjournal.138.557

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  • Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Shoma Ohata, Keita Fujiki, Kazuhiro Umetani, Eiji Hiraki

    2018 20TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'18 ECCE EUROPE)   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Intermediate resonators (repeaters) for resonant inductive coupling wireless power transfer have been widely studied as a method of improving not only the transmission distance but also the output power. For the repeater to operate effectively, it is needed to induce a large current in the repeater to enhance the magnetic field far from a transmitting resonator. However, it is often difficult to induce a large current in the repeater due to frequency splitting phenomenon. This phenomenon easily occurs when the resonator having high quality factor such as the repeater is used. The frequency characteristic of the induced current in the repeater has multiple peaks when the frequency splitting phenomenon occurs. In addition, these multiple peaks shift according to slight variation in the parameters of the coil and the capacitor that constitute the resonator. This slight variation is easily caused by production error, temperature characteristic, and aging degradation of the coil and the capacitor. The induced current in the repeater is significantly decreased by the slight variation in the parameters, namely, the slight variation in the resonance frequency. Therefore, the repeater has low robustness against variation in the resonance frequency. To address these difficulties, we apply an auxiliary circuit to the repeater. The auxiliary circuit can dynamically adjust a phase of the induced current in the repeater, namely, the resonance frequency without complicated control. As a result, a large induced current can be maintained even if the frequencies corresponding to the peaks shift. Consequently, we can provide the repeater having a stable characteristic against the variation in the resonance frequency. The effectiveness of the repeater applied the auxiliary circuit and the appropriateness of analysis results are supported with simulation and experimental results.

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  • Impedance Matching to Maximize Induced Current in Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    2018 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   6194 - 6201   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Intermediate resonators (repeaters) of resonant inductive coupling wireless power transfer systems can improve the transmission distance as well as the output power. However, frequency bandwidths in which the repeater can operate effectively are very narrow because the repeater usually has a high quality-factor. Furthermore, these frequency bandwidths shift for the following two factors. The first factor is the intensity of the magnetic coupling between the repeater and the other resonator. The second factor is the variation in the natural resonance frequency of the resonators due to a production error, temperature characteristic, and aging degradation. Therefore, the repeater is not practical because the repeater requires accurate adjusting of the circuit parameters every time according to the various conditions. To address this problem, we propose an impedance matching method for the repeater. The proposed method can maximize the induced current in the repeater in wide frequency bandwidth regardless of the variations in the intensity of the magnetic coupling and the natural resonance frequency. Therefore, the proposed method can realize the repeater which can stably improve the performance of the wireless power transfer. Experiment and simulation successfully verified the effectiveness of the proposed method as well as the appropriateness of the theoretical analysis.

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  • Application of Automatic Resonant Frequency Tuning Circuit to Induction Heating System

    Koki Kamaeguchi, Kazuhiro Umetani, Eiji Hiraki

    2018 20TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'18 ECCE EUROPE)   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Induction heating is the technique that heats the conductive material by high frequency large AC magnetic field. For efficient generation of the AC magnetic field, induction heating technique commonly utilizes the resonance between the heating coil and the resonating capacitor. The resonance is generally excited by applying the AC voltage of the resonant frequency. However, the resonant frequency is unstable because this frequency is susceptible to the disposition of the material to be heated. As a result, high efficiency high power induction heating system often suffers from unstable operation. This paper addresses this problem by proposing application of a simple automatic resonant frequency tuning circuit to the induction heating. This circuit can automatically achieve equivalent adjustment of the resonance frequency at the operating frequency without special control or the circuit sensing. In addition, this paper elucidated the control method of this tuning circuit to achieve the soft-switching operation in both of the inverter that drives the heating coil and the tuning circuit itself. The experiment revealed successful stabilization of the resonant frequency as well as satisfaction of the soft-switching condition both of the inverter and the tuning circuit, supporting effectiveness of the tuning circuit for induction heating.

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  • Soft-Switching Control Circuit Based on Traveling and Reflected Waves for High -Frequency Resonant Inverter Applicable to Capacitive Load Impedance

    Aoi Oyane, Koji Itakura, Kazuhiro Umetani, Eiji Hiraki, Tatsuya Ikenari, Shingo Kawano

    IECON 2018 - 44TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   3051 - 3056   2018年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Resonant inverters are widely utilized to generate high-frequency high voltage AC power for the power supply to the plasma generator. These inverters commonly require the load impedance to be inductive for achieving soft-switching operation. However, the impedance often fluctuates to be momentarily capacitive due to the unstable state of the plasma, thus causing enormous switching loss and possibly destroying the inverters. This paper addresses this difficulty by using a recently-proposed resonant inverter that can achieve soft-switching operation under the capacitive load impedance. For this purpose, this paper proposes a novel soft-switching controller for applying this inverter for plasma generator application. The proposed controller observes the load impedance and controls the resonant inverter according to the impedance value. Because of the highfrequency AC power supply to the plasma generator, the voltage and current measurement are difficult for estimation of the load impedance. Therefore, the proposed controller estimates the load impedance based on traveling and reflected wave measurement. The experiment revealed successful control of the inverter according to the load impedance, suggesting high feasibility for applying the inverter to the plasma generator.

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  • Straightforward Measurement Method of Common Source Inductance for Fast Switching Semiconductor Devices Mounted on Board

    Kazuhiro Umetani, Kyota Aikawa, Eiji Hiraki

    IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS   64 ( 10 )   8258 - 8267   2017年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Recent progress of widebandgap semiconductor switching devices enabled extremely high-frequency operation of power converters owing to their ultrafast switching capability. Fast switching may cause large switching noise at the common source inductance, which may increase the switching loss and lead to false triggering. Therefore, measurement of the common source inductance is often intensely required in practical design of fast switching power converters. However, measurement of the common source inductance is difficult, because 1) the wiring path hidden beneath the molded package significantly contributes to this inductance, 2) the mutual inductance between the gating circuit and the power circuit also contributes to this inductance, and 3) this inductance cannot be defined as the stray inductance of a loop wiring path. These difficulties are addressed in this paper by proposing a novel measurement method of the common source inductance. The proposed method is applicable to already-mounted power circuits. In addition, the proposed method offers a straightforward measurement procedure with common instruments, such as a signal generator, an oscilloscope, and voltage and current probes. Along with the measurement principle, this paper also presents an experiment to evaluate the proposed method.

    DOI: 10.1109/TIE.2017.2694411

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  • 電気自動車用スイッチトリラクタンスモータにおけるトルクリップルと電源電流リップルを抑制するための相電流プロファイルと磁気抵抗プロファイルの導出 (静止器 回転機合同研究会・電磁界数値計算技術とその応用)

    楠見 隆行, 原 拓斗, 梅谷 和弘, 平木 英治

    電気学会研究会資料. RM   2017 ( 98 )   71 - 76   2017年9月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • 位相制御による共振周波数の追従が可能な磁界共鳴型非接触給電用受電回路の開発に向けた動作原理の検証

    西海賢二, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • 金属箔を選択的に加熱する誘導加熱用コイルの設計及び妥当性の検証

    長谷拓朗, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • Optimization of the Balance between the Gate-Drain Capacitance and the Common Source Inductance for Preventing the Oscillatory False Triggering of Fast Switching GaN-FETs

    Rynosuke Matsumoto, Kazuhiro Umetani, Eiji Hiraki

    2017 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   405 - 412   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    GaN-FETs are attractive switching devices for their fast switching capability. However, they often suffer from the oscillatory false triggering, i.e. a series of self-sustaining repetitive false triggering induced after a fast switching. The purpose of this paper is to derive a design instruction to prevent this phenomenon. According to the previous study, the oscillatory false triggering was found to be caused by a parasitic oscillator circuit formed of a GaN-FET, its parasitic capacitance, and the parasitic inductance of the wiring. This paper analyzed the oscillatory condition to elucidate the design requirement to prevent the oscillatory false triggering. As a result, balancing the gate-drain parasitic capacitance and the common source inductance to achieve an appropriate ratio was found to be essential for preventing the oscillatory false triggering. Experiment successfully supported prevention of this phenomenon by balancing these two factors.

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  • An Investigation into a Slight-Variation of the Transformer Effective Permeability in LLC Resonant Converter

    Mostafa Noah, Shun Endo, Shota Kimura, Masayoshi Yamamoto, Jun Imaoka, Kazuhiro Umetani, Eiji Hiraki

    2017 19TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'17 ECCE EUROPE)   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In the LLC resonant converter, the transformer core is usually gapped to realize the designed value of magnetizing inductance that allows for soft switching. The air gap length which is in a scale of millimeters may be affected by the humidity and long working hours of the ferrite material, resulting into a variation of the core permeability. Moreover, a slight variation of the transformer core permeability may be encountered with any possible change in the core temperature. In a proper transformer design, the transformer shall operate with an optimum value of effective permeability where the sum of both copper and core losses is minimal. In this paper, the transformer optimal design is presented. Moreover, the influence of the permeability on the transformer's copper and core losses is revealed. Furthermore, with the help of newly derived equations, the effect of the transformer's effective permeability on the LLC converter conduction turn-on and turn-off losses is reported. Along with the theoretical discussion, the analysis is supported with simulation and experimental results utilizing a 250W-200kHz prototype.

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  • Compact Three-Phase AC Inductor Network for PFC Converter Using Magnetic Coupled Technique

    Takuya Ozaki, Hiroki Nakaido, Kazuhiro Umetani, Eiji Hiraki, Tatsuya Ikenari, Shingo Kawano

    IECON 2017 - 43RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   958 - 963   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Three-phase power factor correction (PFC) converters have been widely utilized in industrial power applications to improve the power factor and reduce current harmonics in three-phase power grid. The PFC converters commonly incorporate large-sized inductors as a noise filter to suppress the noise emission to the grid. However, as many other power converters, the PFC converters are intensely required to achieve high power density by reducing the size of the inductors. The purpose of this paper is to propose a magnetic structure to miniaturize the inductors. The proposed magnetic structure consists of an integrated magnetic component and a three-phase common-mode choke. By integrating the inductors, the proposed magnetic structure can miniaturize the magnetic core volume, while keeping the saturation current level and the noise filtering capability unchanged. Experiment was carried out to evaluate the appropriateness of the proposed magnetic structure as well as possible volume reduction. As a result, 32.2% volume reduction was found in the proposed magnetic structure without deterioration of the filtering capability.

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  • Application of Extremum Co-Energy Principle for Homogenizing Current Distribution in Parallel-Connected Windings in Transformers: Design Optimization of Winding Turn Allocation among Winding Layers

    Tomohide Shirakawa, Kazuhiro Umetani, Eiji Hiraki

    2017 19TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'17 ECCE EUROPE)   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Parallel-connected windings are widely utilized for power transformers to reduce the copper loss. However, this reduction effect is often hindered by the proximity effect, which causes concentrated current distribution in parallel-connected windings. This paper addresses this issue by proposing a design optimization method of winding turn allocation among winding layers. This optimization method is based on the recently proposed insight on the proximity effect, referred to as the extremum co-energy principle. Experiment on a planar transformer with four primary winding layers was carried out to verify the proposed method. As a result, the proposed method successfully optimized the allocation of the winding turns to minimize the AC resistance.

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  • Analytical Investigation on Design Instruction to Avoid Oscillatory False Triggering of Fast Switching SiC-MOSFETs

    Yusuke Sugihara, Kimihiro Nanamori, Seiya Ishiwaki, Yuma Hayashi, Kyota Aikawa, Kazuhiro Umetani, Eiji Hiraki, Masayoshi Yamamoto

    2017 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   5113 - 5118   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    SiC-MOSFETs have attracting increasing attention because of their outstanding characteristics that contributes to high efficiency and high power density of power converters. However, compared to conventional Si-IGBTs, SiC-MOSFETs are susceptible to false triggering, because they tend to generate large switching noise due to ultrafast switching capability and have a lower threshold voltage in high temperature operation. Particularly, disastrous oscillation of repetitive false triggering can occur after a fast turn-off, which is the severe issue for practical application of SiC-MOSFETs. The purpose of this paper is to give an instruction to avoid this phenomenon. This paper hypothesized that the repetitive false triggering is the parasitic oscillation caused by parasitic capacitance of SiC-MOSFET, and parasitic inductance of wiring. Based on this hypothesis, this paper analyzed the oscillatory condition of the parasitic oscillator to propose a design instruction to avoid the oscillatory false triggering. The result revealed that the parasitic inductance of the gate, drain, and source wiring should be designed so that the resonance frequency of the parasitic LC resonator in the gating circuit is far apart from that of the power circuit. This paper also presents experimental results that support appropriateness of the proposed design instruction.

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  • Evaluation of Impact of Parasitic Magnetic Coupling in PCB Layout on Common Source Inductance of Surface Mounted Package

    Ryunosuke Matsumoto, Kyota Aikawa, Akihiro Konishi, Kazuhiro Umetami, Eiji Hiraki

    2017 IEEE 12TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS (PEDS)   559 - 566   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Recently, the common source inductance (CSI) is regarded as one of the most important obstacles for achieving ultrafast switching of switching converters. The CSI is pointed out to be a major cause of deterioration of the switching speed and false triggering. Therefore, many design instructions of next generation switching devices, such as GaN-FETs and SiC-MOSFETs, have pointed out the necessity to reduce the CSI. Certainly, many of the next generation switching devices are provided in surface mount packages in order to enable PCB designers to minimize the CSI by eliminating the common source path. However, the parasitic magnetic coupling between the gating circuit and the power circuit may still add the CSI, although preceding studies have scarcely reported how greatly the PCB layout can affect the CSI and the switching waveforms. This paper experimentally evaluated the impact of the parasitic magnetic coupling of the PCB layout on the CSI of the surface mount package and on the switching waveforms. As a result, the parasitic magnetic coupling was found to cause the major difference in the CSI. In addition, large difference in the turn-off switching waveforms was found to be caused by the difference in the magnetic coupling. The reason is also analyzed and discussed in this paper, suggesting importance of appropriate design of the parasitic magnetic coupling in the PCB layout.

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  • Measurement of the Common Source Inductance of Typical Switching Device Packages

    Kyota Aikawa, Tomohumi Shiida, Ryunosuke Matsumoto, Kazuhiro Umetani, Eiji Hiraki

    2017 IEEE 3RD INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE AND ECCE ASIA (IFEEC 2017-ECCE ASIA)   1172 - 1177   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The common source inductance is one of the major causes of deterioration of the switching speed and susceptibility of the false triggering for semiconductor switching devices. Practical design of this inductance requires selection of an appropriate semiconductor package because this inductance is greatly dependent on the physical package structure. However, few studies have reported a list of the common source inductance of commercially available packages. In order to list and compare the common source inductance among typical semiconductor packages, this paper carried out measurement of this inductance of actual switching devices mounted on experimental PCBs. This paper employed a recently proposed straightforward measurement technique directly applicable to switching devices mounted on PCBs. As a result, a basic database of the common source inductance of typical packages was presented. The common source inductance was found to be determined mainly by the package type. However, in TO-247 and TO-220 packages, approximately one-third of the total common source inductance was found to possibly vary among the switching devices of the same package due to the dependence on the current rating. Investigation of the physical package structure implied that this dependence was caused by the stray inductance of the bonding wires connecting the semiconductor chip to the source terminal.

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  • Elucidation of Quasi-Duality between Series-Series and Series-Parallel Topologies of Resonant Inductive Coupling Wireless Power Transfer Systems

    Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    2017 IEEE 12TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS (PEDS)   674 - 679   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Series-Series (SS) and Series-Parallel (SP) topologies are widely utilized in practical resonant inductive coupling wireless power transfer (RIC-WPT) systems owing to their simple circuit configurations. Conventionally, design optimization of the circuit parameters of these topologies were investigated separately, because these topologies are expressed by different equivalent circuits. However, analysis of these equivalent circuits is generally complicated due to the multiple resonant modes contained in the operation, which may cause difficulty in comparing the performance between the SS and SP topologies after design optimization of these topologies. This difficulty may prevent elucidating the methodology to select an appropriate topology that offers better output power or efficiency after design optimization. The purpose of this paper is to suggest a selection methodology of the SS and SP topologies by elucidating a novel insight that these topologies have the quasi-duality relation, in which the SP topology works approximately as the dual of the SS topology. This insight enables to share the analysis results between the topologies. As a result, both of these topologies were found to be expressed by a same novel equivalent circuit. Furthermore, the only difference between the SS and SP topologies were found to be the equivalent load resistance of this equivalent circuit, thus reducing the topology selection into selection of preferable load resistance. The appropriateness of the quasi-duality relation and the resultant equivalent circuit was successfully confirmed by the simulation and the experiment.

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  • Soft-switching Technique Applicable to Capacitive Load for Resonant Inverter of Plasma Generator

    Koji Itakura, Hiroaki Kakemizu, Hiroki Nakaido, Kazuhiro Umetani, Eiji Hiraki, Tatsuya Ikenari, Shingo Kawano

    IECON 2017 - 43RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   1556 - 1562   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Recently, resonant inverters have been employed to generate high voltage high frequency AC power for plasma generator of the semiconductor processing equipment. This inverter is beneficial in low switching loss owing to its natural soft switching capability under inductive load impedance. Generally, the resonant inverter for plasma generator is designed to have inductive load using an impedance matching circuit that interfaces the inverter and the plasma reactor. However, the load impedance often fluctuates according to the state of the plasma, momentarily causing the capacitive load impedance. In this case, the inverter is generally controlled to restrict the output power for circuit protection from excessive switching loss, although this will result in unstable plasma, deteriorating the quality of the semiconductor processing. This paper addressed this difficulty by applying a soft switching technique to the resonant inverter. This soft-switching technique can be utilized regardless to the capacitive or inductive load. Experiment was carried out to evaluate the effectiveness of the proposed technique. As a result, the effective reduction of the switching loss was successfully verified even under the capacitive load impedance.

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  • Simple Self-Driven Synchronous Rectifier for Resonant Inductive Coupling Wireless Power Transfer

    Takahiro Koyama, Toru Honjo, Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

    2017 IEEE INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC)   363 - 368   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Resonant inductive coupling wireless power transfer (RIC-WPT) is attracting attention as a convenient power supply method to small mobile apparatus. The efficiency and the power transfer capability of RIC-WPT has been known to be profoundly dependent on the quality factor of the receiving resonator. However, the quality factor of the receiving resonator tends to be deteriorated because of the conduction loss at the diode rectifier, particularly for low output voltage applications. In order to improve the efficiency and the power transfer capability, this paper propose a novel simple synchronous rectifier, which can reduce the conduction loss. The proposed rectifier has simple circuit configuration, which contributes to straightforward application to the wireless power transfer to small mobile apparatus with limited installation space. Experiment was carried out to verify the operation principle of the proposed rectifier. As a result, the proposed rectifier revealed successful suppression of the conduction loss. In addition, the experimental wireless power transfer system verified successful improvement in the rectification efficiency, supporting usefulness of the proposed rectifier for practical applications of the RIC-WPT for small mobile apparatus.

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  • 種々の分散電源に対応するDC/AC変換回路技術の動向

    三浦友史, 石川裕記, 江口政樹, 服部将之, 平木英治, 北條昌秀, 松井景樹

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • コモンソースインダクタンスを考慮したスイッチング損失の再現精度向上

    小西晃央, 相川恭汰, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • 一体化磁気部品を用いた電気自動車用小型双方向絶縁コンバータの動作検証

    大畑奨真, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • 熱量計測に基づく高周波コンバータ用磁気部品の損失測定手法:磁気部品損失の温度特性の計測

    白川知秀, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2017   2017年

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  • Simple Analytical Derivation of Magnetic Flux Profile Eliminating Source Current Ripple and Torque Ripple of Switched Reluctance Motors for Electric Vehicle Propulsion

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    2017 THIRTY SECOND ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC)   3142 - 3149   2017年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a simple control technique for switched reluctance motors to eliminate both the source current ripple and the torque ripple simultaneously. The proposed control is a current tracking control based on a pre-computed magnetic flux profile. This profile is derived using a simple analytical SRM model without the magnetic saturation. Conventionally, the magnetic saturation is commonly utilized for limiting excessive magnetic flux induction to improve the torque output. However, in the proposed control, the magnetic flux profile is utilized for limiting the magnetic flux by control. By controlling without the magnetic saturation, elimination of the source current ripple and the torque ripple can be achieved regardless to the output power. Along with theoretical derivation of the magnetic flux profile, an experiment is carried out to evaluate the proposed control. The results revealed suppression of the source current ripple and the torque ripple simultaneously in comparison with the conventional square-wave current control.

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  • A design guideline of parasitic inductance for preventing oscillatory false triggering of fast switching GaN-FET

    Kazuhiro Umetani, Keisuke Yagyu, Eiji Hiraki

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   11   S84 - S90   2016年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    Gallium nitride field-effect transistors (GaN-FETs) are attractive devices because of its low on-state resistance and fast switching capability. However, they can suffer from false triggering caused by fast switching. Particularly, a disastrous oscillation of repetitive false triggering can occur after a turn-off, which may deteriorate the reliability of power converters. To address this issue, we give a design guideline to prevent this phenomenon. We analyze a simple circuit model to derive the condition of occurrence of this phenomenon, which is then verified experimentally. Results show that the parasitic inductance of the gating circuit, L-g, and that of the decoupling circuit, L-d, should be designed so that the LC resonance frequency of L-g and the gate-source capacitance of the GaN-FET does not coincide with that of L-d and the drain-source capacitance, respectively. (c) 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.22339

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  • GaN-FETの連鎖的誤動作を抑制するためのソース端子のインダクタンスを考慮した配線インダクタンス設計指針

    松本隆之介, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2016   2016年

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  • Lagrangian Derivation and Analysis of a Simple Equivalent Circuit Model of Wireless Power Transfer System with Dual Transmitting Resonators

    Takahiro Koyama, Toru Honjo, Kazuhiro Umetani, Eiji Hiraki

    2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE)   2016年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a novel analysis method for the dual transmitting resonators wireless power transfer (DTR-WPT) system. The DTR-WPT is attractive for its higher efficiency and greater power transfer capability compared with the conventional single transmitting resonator wireless power transfer (STR-WPT) system. However, analytical understanding of the DTR-WPT is difficult due to its complicated operating principle caused by two transmitting resonators and a receiving resonator, which are all magnetically coupled each other. Therefore, practical applications of the DTR-WPT may be hindered by difficulty in establishing a design optimization method and a control scheme.This difficulty is addressed in this paper by proposing a novel simple equivalent circuit model of the DTR-WPT. Lagrangian dynamics is employed to derive this model. Brief analysis of this model showed improvement in the efficiency and the power transfer capability by the DTR-WPT compared with the conventional STR-WPT. In addition, the power transfer of the DTR-WPT system was found to be expressed by the same equivalent circuit model as the STR-WPT system. Therefore, similar design optimization methods and similar control schemes as for the STR-WPT are applicable to the DTR-WPT. Along with the theory, this paper presents experiments that verified appropriateness of the proposed model as well as the analysis results based on this model.

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  • Simple Control Technique to Eliminate Source Current Ripple and Torque Ripple of Switched Reluctance Motors for Electric Vehicle Propulsion

    Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki

    PROCEEDINGS OF THE IECON 2016 - 42ND ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   1876 - 1881   2016年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Switched reluctance motors (SRMs) are expected to be applied to propulsion systems of electric vehicles for their robust mechanical construction and cost-effectiveness. On the other hand, their large source current ripple and large torque ripple are main obstacles in practical applications of SRMs to vehicle propulsion. Certainly, a number of studies have been dedicated to address the torque ripple. However, unlike other motors driven by sinusoidal phase current waveforms, the large source current ripple of SRMs generally remains, even if the torque ripple is removed. The purpose of this paper is to propose a simple control technique of SRMs for vehicular propulsion by eliminating the source current ripple as well as the torque ripple. The proposed control is a current tracking control based on a pre-computed current profile. Because vehicular propulsion requires to instantaneously output large torque in sudden acceleration, SRMs tend to be designed to be propelled below the magnetic saturation in normal vehicle travel. Therefore, this proposed current profile is derived using a simple SRM analytical model without the magnetic saturation. In addition, the proposed current profile is determined so that the peak magnetic flux is minimized to offer high-speed current response at a high rotating velocity. Along with theoretical derivation of the proposed control, this paper also presents an experiment to verify the principle of the proposed control technique, which successfully revealed reduction of both the source current ripple and the torque ripple.

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  • Copper Loss Analysis Based on Extremum Co-Energy Priciple for High Frequency Forward Transformers with Parallel-Connected Windings

    Tomohide Shirakawa, Genki Yamasaki, Kazuhiro Umetani, Eiji Hiraki

    PROCEEDINGS OF THE IECON 2016 - 42ND ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   1099 - 1105   2016年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The Dowell model is widely utilized for copper loss analysis of forward transformers. However, this model is not directly applicable to transformers with parallel-connected windings. The reason is that the Dowell model requires determining the AC current of all the windings in advance of analysis, although the AC current distribution in parallel connected windings is severely affected by disposition of the windings. This issue is addressed in this paper by employing the Dowell model in combination with a novel insight that the AC current is distributed in parallel-connected windings to give an extremum of the magnetic co-energy of the transformer. Simulation and experiment were carried out; and, the results supported appropriateness of the proposed copper loss analysis method.

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  • アルミ鍋に発生する浮上力抑制を目的としたアキシャル型IHクッキングヒータ

    岡 洋平, 梅谷 和弘, 平木 英治

    パワーエレクトロニクス学会誌   42   149 - 149   2016年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.42.149

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  • A Simple Behavior Model for Switched Reluctance Motors Based on Magnetic Energy

    Takuto Hara, Takayuki Kusumi, Kazuhiro Umetani, Eiji Hiraki

    2016 IEEE 8TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC-ECCE ASIA)   109 - 115   2016年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A number of analytical models for switched reluctance motors have been proposed to promote development of control techniques that can alleviate the torque and source current ripples. However, these models can suffer from a large database of the nonlinearity as well as complicated derivation process of the torque and the voltage-current relation. The purpose of this paper is to propose a simple practical behavior model with small database and straightforward derivation of the torque and the voltage-current relation. The proposed model has a simple database of the magnetic energy as a matrix. The flux linkage and the electrical angle are chosen as the state variables. Along with theoretical formulation of the model, this paper presents a practical method of the model construction. In addition, experiments successfully predicted both torque and current waveforms, supporting appropriateness of the proposed model.

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  • 基板実装したMOSFETのソース寄生インダクタンスの測定法

    相川恭汰, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2016   2016年

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  • 磁界共振結合型ワイヤレス給電システムにおけるSS方式とSP方式の準双対性の解析

    石原將貴, 梅谷和弘, 平木英治, 山本真義

    電気学会産業応用部門大会(CD-ROM)   2016   2016年

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  • 並列インダクタ接続型プラズマ発生用共振型インバータの実証評価

    板倉康仁, 掛水浩晃, 中井戸博樹, 梅谷和弘, 平木英治, 池成達也, 河野真吾

    電気学会産業応用部門大会(CD-ROM)   2016   2016年

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  • デュアル共振器を用いた磁界共鳴型ワイヤレス給電における送電電力最大化のための最適負荷インピーダンス導出手法 (電子デバイス 半導体電力変換合同研究会・パワーデバイス・パワーエレクトロニクスとその実装技術)

    小山 貴大, 梅谷 和弘, 平木 英治

    電気学会研究会資料. SPC = The papers of technical meeting on semiconductor power converter, IEE Japan   2015 ( 146 )   79 - 84   2015年10月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • Lagrangian-based Equivalent Circuit of Basic Electric-Field Coupling Wireless Power Transfer System

    Hirokatsu Umegami, Kazuhiro Umetani, Masayoshi Yamamoto, Eiji Hiraki

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   10   S168 - S170   2015年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Electric-field coupling wireless power transfer has been commonly analyzed using the circuit model. However, the circuit behavior of this model is not necessarily apparent because their resonant modes can be far complicated than the basic LC oscillation. This issue is addressed in this paper by proposing a novel equivalent circuit for a basic wireless power transfer system. This equivalent circuit has a simpler topology than the conventional circuit model. Furthermore, the equivalent circuit allows intuitive understanding of three types of the resonant modes. Along with theoretical derivation of the proposed equivalent circuit, this paper also presents simulation results, which verified the appropriateness of the equivalent circuit. (C) 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.22180

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  • Novel Simple Reactive Power Control Strategy With DC Capacitor Voltage Control for Active Load Balancer in Three-Phase Four-Wire Distribution Systems

    Tint Soe Win, Yoshihiro Hisada, Toshihiko Tanaka, Eiji Hiraki, Masayuki Okamoto, Seong Ryong Lee

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   51 ( 5 )   4091 - 4099   2015年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    This paper proposes a novel simple reactive power control strategy for the active load balancer (ALB) in three-phase four-wire distribution systems. The proposed reactive power control strategy may be applicable for adjustment of the source-side power factor under the balanced load condition. Only dc capacitor voltage control is used in the proposed control strategy. Therefore, the calculation blocks of the active and reactive components of the load currents are not necessary. The authors, thus, offer the simplest control strategy to control reactive power under the balanced load condition on three-phase four-wire distribution feeders. The basic principle of dc-capacitor-voltage-control-based reactive power control strategy is discussed in detail and then confirmed by digital computer simulation. A prototype experimental system was constructed and tested. Experimental results demonstrate that balanced source currents with reactive power control are achieved on three-phase four-wire distribution feeders. These experimental results also demonstrate that controlling the reactive power reduces the required power rating of the ALB compared with that of the conventional unity power factor control strategy.

    DOI: 10.1109/TIA.2015.2437972

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  • Experimental Validation of Normally-On GaN HEMT and Its Gate Drive Circuit

    Takaharu Ishibashi, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Daigo Kikuta, Tetsu Kachi

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   51 ( 3 )   2415 - 2422   2015年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Wide-bandgap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) are promising materials for next-generation power devices. We have fabricated a normally on GaN-based high-electron-mobility transistor (GaN HEMT) for power electronic converters. In this paper, the current collapse phenomena, which are distinctive characteristics of GaN devices, are evaluated in detail for several voltages with two switching frequencies. We also evaluate a gate drive circuit that we previously proposed for the normally on GaN HEMT with a single positive voltage source. We construct and test prototype circuits for a boost-type dc-dc converter and a single-phase full-bridge inverter with a gate drive circuit. The problems to be solved for the normally on GaN HEMT, which has a (static) voltage rating of over 600 V, are clarified on the basis of the experimental results.

    DOI: 10.1109/TIA.2014.2369818

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  • Reduced-Capacity Smart Charger for Electric Vehicles on Single-Phase Three-Wire Distribution Feeders With Reactive Power Control

    Hidenori Tanaka, Toshihiko Tanaka, Takaaki Wakimoto, Eiji Hiraki, Masayuki Okamoto

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   51 ( 1 )   315 - 324   2015年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    In this paper, we propose a new control algorithm to reduce the capacity of a previously proposed smart charger for electric vehicles (EVs) on single-phase three-wire distribution feeders with reactive power control. The basic principle of the proposed control algorithm is discussed in detail. It is shown that controlling the reactive power on the source side reduces the capacity of the previously proposed smart charger. A digital computer simulation is implemented to confirm the validity of the proposed control algorithm using PSIM software. A prototype experimental model is also constructed and tested. Experimental results demonstrate that balanced source currents with a power factor of 0.9, which is acceptable for Japanese home appliances, are obtained on the secondary side of the pole-mounted distribution transformer during both the battery charging and discharging operations in EVs. The capacity of dc capacitor C-DC is also reduced by 37% with the proposed reactive power control algorithm.

    DOI: 10.1109/TIA.2014.2327156

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  • 太陽光発電システムの出力低下とストリングコンバータによる改善効果の検討

    中井戸博樹, 吉田正伸, 藤原憲一郎, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • Lagrangian-Based Derivation of a Novel Sliding-Mode Control for Synchronous Buck Converters

    Kazuhiro Umetani, Masayoshi Yamamoto, Eiji Hiraki

    IEEJ JOURNAL OF INDUSTRY APPLICATIONS   4 ( 6 )   728 - 729   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ELECTRICAL ENGINEERS JAPAN  

    Sliding-mode control for power converters is gaining significant research interest for achieving a fast transient response to a step load change in a wide operating range. However, power converters also require better dynamic load regulation against load current fluctuations slower than the step change. This paper addresses this issue by deriving a novel control method for synchronous buck converters using Lagrangian dynamics. Simulation results verified improvement in dynamic load regulation against slow sinusoidal load current fluctuations.

    DOI: 10.1541/ieejjia.4.728

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  • Passive Regenerative Turn-off Snubber Composed of Two Diodes and a Capacitor for Two-Phase Interleaved Boost Chopper

    Kazuhiro Umetani, Eiji Hiraki, Masayoshi Yamamoto

    2015 IEEE INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC)   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Communication relay stations often suffer from common-mode noise generated by high speed switching in a boost chopper equipped for power supply. This problem can be addressed by applying soft-switching techniques to the boost chopper, although this can lead to significant increase in the circuit volume. To address this difficulty, this paper proposes a novel passive regenerative turn-off snubber applicable to the two-phase interleaved boost chopper. The proposed snubber can add small circuit volume because it is implementable only by two diodes and a capacitor. Experiments are carried out to verify the operating principles of the proposed snubber. The results successfully verified suppression of the rising speed of the drain voltage at the turn-off in both of the phases without apparent deterioration of the efficiency.

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  • Reactive Power Control Strategy Based on DC Capacitor Voltage Control for Active Load Balancer in Three-Phase Four-Wire Distribution Systems

    Tint Soe Win, Toshihiko Tanaka, Masayuki Okamoto, Yoshihiro Hisada, Eiji Hiraki, Seong Ryong Lee

    IEEJ JOURNAL OF INDUSTRY APPLICATIONS   4 ( 3 )   158 - 165   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:INST ELECTRICAL ENGINEERS JAPAN  

    This paper proposes a reactive power control strategy for the active load balancer (ALB) in three-phase four-wire distribution systems. The proposed reactive power control strategy is based on constant DC capacitor voltage control only, which is always used in active power line conditioners. Therefore, the proposed approach does not require active and reactive calculation blocks of load currents for the reference source current calculation. The power factor of the source side currents can be adjusted under the balanced load condition using the proposed reactive power control strategy. The basic principle of the reactive power control strategy for the ALB is discussed in detail and verified via digital computer simulation using power electronic simulation (PSIM) software. A prototype experimental model is constructed and tested to demonstrate the validity and high practicability of the proposed control strategy. Simulation and experimental results indicate that balanced source currents with a predefined power factor are achieved when the proposed control strategy is applied to the three-phase four-wire distribution systems.

    DOI: 10.1541/ieejjia.4.158

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  • High-frequency Induction Heating for Tiny Foreign Metals

    Shinya Kurachi, Naoki Yamamoto, Hiroaki Yamada, Toshihiko Tanaka, Eiji Hiraki, Yukiharu Yamada, Tatsuya Nagao, Yasuhiro Miyake, Yujiro Noda

    2015 9TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND ECCE ASIA (ICPE-ECCE ASIA)   2203 - 2208   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The anxiety of tiny metal contamination into resin materials in the manufacturing process has become one of the serious issues. Because it may often cause of overheat in lithium-ion batteries, flat panel displays, and so on. Therefore, a study on detecting method of the tiny metals is a significant issue. The authors have been investigating the high-frequency induction heating (IH) based approach for tiny metals detection. In this paper, effective magnetic circuit design and IH conditions are discussed and demonstrated from theoretical and experimental point of view.

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  • Non-isolated Interleaved High Step-up Converter with Reduced Voltage Multiplier Stages and a Regenerative Turn-off Snubber

    Kazuhiro Umetani, Eiji Hiraki, Masayoshi Yamamoto

    2015 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   125 - 132   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a novel non-isolated high step-up converter suitable for miniaturization by high frequency design. High step-up converters with voltage multipliers are promising for high frequency design because many of them can be free from coupled inductors or transformers, which may lower the voltage gain due to the leakage inductance or may cause significant AC conduction loss in the primary winding. However, two issues can still hinder further miniaturization. One is that many multiplier stages may be needed to achieve extremely high voltage gain. The other is that high switching frequency may be restricted by severe turn-off voltage surge caused by high speed switching. The proposed converter addresses the former by applying a recently reported technique to a non-isolated boost converter. Additionally, the converter addresses the latter by proposing a simple passive regenerative turn-off snubber implementable only by two diodes and a capacitor. Experiments verified that the proposed converter achieves high voltage gain with fewer voltage multiplier stages compared to prior non-isolated high step-up converters. Additionally, the snubber successfully reduced the turn-off surge into half approximately without apparent deterioration of the efficiency.

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  • スイッチング波形の予測精度向上に向けたSPICEモデルの課題抽出

    相川恭汰, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • 熱量計測に基づいた絶縁コンバータ用高周波トランスの損失測定法

    白川知秀, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • ソフトスイッチング適用によるプラズマ発生用高周波インバータの半導体素子損失低減効果の検討

    掛水浩晃, 梅谷和弘, 平木英治, 河野真吾, 福本佳樹

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • 平滑インダクタの一体化による三相PFC コンバータの小型化技術の提案

    中井戸 博樹, 梅谷 和弘, 平木 英治

    パワーエレクトロニクス学会誌   41   160 - 160   2015年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.41.160

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  • 交流電源にインタフェースされるパワーエレクトロニクス回路技術の動向-低ノイズ化技術-

    平木英治, 黒川不二雄, 船渡寛人, 吉田正伸, 斎藤真, 西田保幸

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • SRMのモデル化に向けた鉄損の電気角依存性評価

    楠見隆行, 梅谷和弘, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • 解析力学を用いた新規等価回路表現に基づく磁界共鳴型と電界共鳴型ワイヤレス給電システムの力学的等価性の解析

    梅谷和弘, 梅上大勝, 平木英治, 山本真義

    電気学会産業応用部門大会(CD-ROM)   2015   2015年

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  • 観賞用ロボット魚のWPT効率改善とカプセル内視鏡給電への展望 (無線電力伝送)

    伊藤 竜次, 澤原 裕一, 石崎 俊雄, 吉澤 圭佑, 平木 英治, 粟井 郁雄

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   114 ( 375 )   9 - 14   2014年12月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    我々の研究グループでは、結合共振器型WPTシステムを用いた水槽中でのロボット魚への無線給電を検討してきた。この方式はほとんどこのままカプセル内視鏡への給電に転用できる。そのため、観賞用ロボット魚への無線給電システムの受電共振器の最適化、スイッチング電源の高効率化はカプセル内視鏡への応用にもつながる。また、人体という高誘電率、高損失で空間的に非一様である媒質の特殊性、安全性への要求の違いもあるので、このような問題点を明らかにしながら実用化への課題を探る。

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  • 水槽中ロボット魚への無線給電システムにおけるスイッチング電源と伝送系の関係 (無線電力伝送)

    伊藤 竜次, 澤原 裕一, 石崎 俊雄, 吉澤 圭佑, 平木 英治, 粟井 郁雄

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   114 ( 310 )   49 - 54   2014年11月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    我々の研究グループでは、結合共振器型WPTシステムを用いた水槽中でのロボット魚への無線給電を検討してきた。スイッチング電源から負荷に至るWPTシステム全体の設計を行いそこで実施した設計の手法を示す中で、伝送モードの選択法やスイッチング電源のソフトスイッチング動作のための入力インピーダンスの条件等の新しい重要な問題点について論じている。

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  • Peak Power Shaving of an Electric Injection Molding Machine With Supercapacitors

    Hirofumi Akiyoshi, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto, Tadayoshi Matsuo, Kiyoshi Ochi

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   50 ( 2 )   1114 - 1120   2014年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    In this paper, we propose the control method of a peak shaving system for an electric injection molding machine (EIMM). The peak power shaver consists of a multiphase bidirectional dc-dc converter and supercapacitors (SCs), and is connected to a dc link of the inverter fed injection motor drive system of the EIMM. In the proposed control method, electric power is stored in the SCs through the multiphase bidirectional dc-dc converter with a pulsewidth-modulation rectifier while the injection motor is at rest. When the injection motor is accelerating, the stored power in the SCs together with the power from the distribution feeders is supplied to the injection motor. Thus, the peak power can be shaved. The basic principle of the proposed control method is discussed in detail, then confirmed by digital computer simulation and experimental setup. The simulation and experimental results demonstrate that the peak power is shaved by 70% using the peak power shaving system.

    DOI: 10.1109/TIA.2013.2272433

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  • MHz-class High-frequency Soft-switching GaN-based Inverter for Wireless Power Transmission via Electromagnetic Resonance

    Keisuke Yoshizawa, Toshihiko Tanaka, Eiji Hiraki, Masayuki Okamoto

    2014 INTERNATIONAL ELECTRONICS AND APPLICATION CONFERENCE AND EXPOSITION (PEAC)   451 - 455   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Wireless power transmission via magnetic resonance has been attracted and interested as long range wireless power transmission method. As a consequence, high-frequency inverter operating under high power conversion efficiency is required. In this paper, power conversion efficiency and power transmission efficiency of full bridge inverter using GaN devices are evaluated and discussed from the experimental point of view.

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  • 電流平衡機能と無効電力調整機能を有するPV発電用PCS

    脇本貴章, 平木英治, 田中俊彦, 岡本昌幸, 川原耕治

    電気学会全国大会講演論文集(CD-ROM)   2014   2014年

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  • 水中負荷への応用を目的とした非接触給電用高周波インバータ

    吉澤圭祐, 山田洋明, 田中俊彦, 平木英治, 岡本昌幸

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   65th   2014年

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  • 負荷側有効電力演算が不要な電気自動車用スマートチャージャの無効電力調整法

    田中秀典, 田中俊彦, 岡本昌幸, 平木英治

    電気学会全国大会講演論文集(CD-ROM)   2014   2014年

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  • 三相4線式配電用ALBの変換器容量の検討

    久田佳大, WIN Tint Soe, 田中俊彦, 平木英治, 岡本昌幸, LEE Seong Ryong

    電気学会全国大会講演論文集(CD-ROM)   2014   2014年

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  • 立体駐車場非接触給電システム用高周波リンクAC-ACコンバータ

    河野 真吾, 平木 英治, 田中 俊彦, 岡本 昌幸

    電気学会論文誌. D, 産業応用部門誌   134 ( 2 )   139 - 146   2014年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new concept for a contactless power supply system (CPS) in a mechanical multi-level parking tower for plug-in hybrid vehicles (PHVs) and electric vehicles (EVs). In recent years, PHVs and EVs have been commercialized as low environmental impact vehicles, and the demand for such vehicles is spreading rapidly. To cater to this increasing demand of PHVs and EVs, battery charging systems in the parking tower are necessary. Most multi-level parking towers have movable parking pallets that are electrically isolated from the building side. Because of the poor positional accuracy of the movable pallets, a contactless power transmission system between the utility grid in the building and the movable pallet is necessary. As for the CPS in the parking tower, a power conversion stage from commercial AC to high-frequency AC is necessary for size reduction. In general, such a power conversion system consists of power factor correction (PFC) converters and high-frequency inverters. Therefore, two or more conversion stages are necessary, which increases the power losses and cost. In this paper, a simple circuit configuration of a high-frequency link AC-AC converter for a CPS in a parking tower is proposed. The proposed high-frequency link AC-AC converter can directly convert commercial AC to high-frequency AC (HFAC) and HFAC to commercial AC again. Experiments are performed to demonstrate the validity of the proposed CPS. The proposed CPS is found to have a coupling coefficient of 0.75 for a contact-less transformer with a 10mm gap, and an efficiency of 86% can be achieved.

    DOI: 10.1541/ieejias.134.139

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  • マルチ出力可能なIHクッキングヒータ用高周波インバータ

    廣川 貴之, 平木 英治, 田中 俊彦, 今井 慎, 安井 健治, 住吉 眞一郎

    電気学会論文誌. D, 産業応用部門誌   134 ( 4 )   477 - 478   2014年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In this paper, a multiple-output high-frequency soft switching inverter is presented for home and business-use of IH cooking appliances. The proposed inverter is composed of parallel-connected single-switched multiresonant inverter cells. A detailed analysis indicates that the proposed inverter can control multiple-output power independently through a phase-shifted PWM scheme. The experimental results suggest that the prototype may be applied to multiple-output induction heating appliances.

    DOI: 10.1541/ieejias.134.477

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  • 負荷側電力演算が不要な 電気自動車用スマートチャージャの無効電力調整法

    田中 秀典, 田中 俊彦, 岡本 昌幸, 平木 英治

    パワーエレクトロニクス学会誌   40   63 - 69   2014年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    This paper proposes a novel reactive power control algorithm without load-side active power calculation for the previously proposed smart charger of Electric Vehicles (EVs) on single-phase three-wire distribution feeders. The basic principle of the proposed reactive power control algorithm is discussed in detail and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents with a power factor of 0.9, which is acceptable value in Japanese regulation, are obtained on the secondary side of the pole-mounted distribution transformer during the battery charging operation.

    DOI: 10.5416/jipe.40.63

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  • Novel, Simple Reactive Power Control Strategy with DC Capacitor Voltage Control for Active Load Balancer in Three-Phase Four-Wire Distribution Systems

    Tint Soe Win, Yoshihiro Hisada, Toshihiko Tanaka, Eiji Hiraki, Masayuki Okamoto, Seong Ryong Lee

    2014 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   3916 - 3921   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a novel, simple reactive power control strategy for the active load balancer (ALB) in three-phase four-wire distribution systems. The proposed reactive power control strategy is applicable for adjustment of the source-side power factor under the balanced load condition. Only DC capacitor voltage control is used in the proposed control strategy. Therefore, the calculation blocks of the active and reactive components of the load currents are not necessary. The authors, thus, offer the simplest control strategy to control reactive power under the balanced load condition on three-phase four-wire distribution feeders. The basic principle of DC capacitor voltage control based reactive power control strategy is discussed in detail, and then confirmed by digital computer simulation. A prototype experimental system was constructed and tested. Experimental results demonstrate that balanced source currents with reactive power control are achieved on three-phase four-wire distribution feeders. These experimental results also demonstrate that controlling the reactive power reduces the required power rating of the ALB compared to that of the existing control strategy, which achieves balanced source currents with unity power factor.

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  • Reactive Power Control Strategy Based on DC Capacitor Voltage Control for Active Load Balancer in Three-Phase Four-Wire Distribution Systems

    Tint Soe Win, Yoshihiro Hisada, Toshihiko Tanaka, Eiji Hiraki, Masayuki Okamoto, Seong Ryong Lee

    2014 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-HIROSHIMA 2014 - ECCE-ASIA)   3292 - 3297   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a reactive power control strategy for the active load balancer (ALB) in three-phase four-wire distribution systems. The proposed reactive power control strategy is based on constant DC capacitor voltage control, which is always used in active power line conditioners. Therefore, the proposed reactive power control strategy does not require active, reactive calculation blocks of load currents for the reference source current calculation. Balanced source currents with a predefined power factor can be achieved without unbalanced active and reactive components detection of the load currents. The basic principle of the reactive power control strategy for the ALB is discussed in detail, and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested to validate the feasibility of the proposed control algorithm. Simulation and experimental results demonstrate that balanced source currents with a predefined power factor are achieved in three-phase four-wire distribution systems.

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  • A Novel Active Power Quality Compensator Topology with DC Voltage Balancer for Electrified Railways

    Tint Soe Win, Eiji Hiraki, Toshihiko Tanaka

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   8 ( 6 )   634 - 639   2013年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    This paper proposes a novel active power quality compensator (APQC) topology with a DC voltage balancer for electrified railways. The APQC is composed of a three-leg structure with two common DC capacitors. Two legs perform as two half-bridge inverters, which compensate the unbalanced active, reactive, and harmonic currents on the source side in the traction substation. The third leg controls two common DC capacitor voltages with a small amount of the output currents. Therefore, the current rating of the third leg can be reduced as compared to that of the already proposed three-leg structured APQC. In the control algorithm of the two half-bridge inverters, a strategy based on constant DC capacitor voltage control is used, which does not need any calculation blocks of the unbalanced active, reactive, and harmonic components of the load current to perform the APQC operation. Thus we offer the simplest algorithm for the proposed APQC. The basic principle of the proposed APQC topology with the DC voltage balancer is discussed in detail, and then confirmed by digital computer simulation using the PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that the proposed APQC can achieve balanced and sinusoidal source currents on the primary side of the Scott transformer in traction substations for electrified railways. (c) 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.21907

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  • Smart Charger for Electric Vehicles With Power-Quality Compensator on Single-Phase Three-Wire Distribution Feeders

    Toshihiko Tanaka, Tsukasa Sekiya, Hidenori Tanaka, Masayuki Okamoto, Eiji Hiraki

    IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS   49 ( 6 )   2628 - 2635   2013年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    In this paper, we propose a smart charger for electric vehicles with a power-quality compensator. The proposed smart charger consists of four-leg insulated-gate bipolar transistors (IGBTs). Three legs are used for a single-phase full-bridge-based pulsewidth-modulated (PWM) rectifier, which converts power from ac to dc during the battery-charging operation or from dc to ac during the battery-discharging operation. This PWM rectifier can compensate reactive and unbalanced active currents on single-phase three-wire distribution systems because the third leg is connected to the neutral line of single-phase three-wire distribution feeders. The fourth leg is used as a bidirectional dc-dc converter for battery-charging and battery-discharging operations. The three-leg PWM rectifier uses only constant dc-capacitor voltage control, which is commonly used in active power line conditioners. Thus, the authors have developed the simplest possible control method for a single-phase power-quality compensator. The basic principle of the proposed smart charger is discussed in detail and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents are obtained on the secondary side of the pole-mounted distribution transformer for battery-charging and battery-discharging operations.

    DOI: 10.1109/TIA.2013.2262915

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  • オールメタル対応IH調理器を目的とした時分割制御高周波インバータ

    廣川 貴之, 平木 英治, 田中 俊彦, 岡本 昌幸, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   133 ( 7 )   692 - 699   2013年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In recent years, induction heating (IH) cookers using a high-frequency (HF) inverter for home use have become increasingly popular because of their cleanliness, high efficiency, safety, and so on. With regard to the domestic consumer markets, effective applicability to a variety of pan materials such as low resistivity materials (aluminum and copper) and high-resistivity materials (iron and magnetic stainless steel) is one of the important issues. In this paper, a time-sharing HF inverter for IH cooking appliances that enables doubling of the output frequency of the switching operation is proposed. The proposed HF resonant inverter is able to reduce switching losses by the frequency doubler and the soft-switching operation. Furthermore, the current rating of the switching power devices is reduced because of the parallel-connected circuit configuration. The basic principle of the proposed time-sharing HF inverter is discussed in detail. The performance and effectiveness of the proposed time-sharing HF inverter are confirmed by experimental point of view.

    DOI: 10.1541/ieejias.133.692

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  • 福山太陽光発電所の公開発電データを用いたメガソーラ発電所の発電コストの試算 (家電・民生研究会・スイッチング電源,家庭向け情報通信機器等のエネルギー有効利用技術および家電・民生技術,一般)

    宅野 和大, 平木 英治, 田中 俊彦

    電気学会研究会資料. HCA   2013 ( 12 )   81 - 86   2013年5月

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    記述言語:日本語   出版者・発行元:電気学会  

    中国電力(株)が2011年12月に広島県福山市において出力電力3000kWの中国電力(株)福山太陽光発電所の運用を開始した。本稿では,中国電力(株)福山太陽光発電所の公開発電データを用いて発電コストを試算する。立地条件と発電所規模が異なる場合を発電コストの観点から検証し,標準的なメガソーラ発電所の設備利用率12%に対し,瀬戸内地域の平坦地は設備利用率が高くメガソーラ発電所の立地に適していることを明らかにする。

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  • Reduced-Capacity Smart Charger for Electric Vehicles on Single-Phase Three-Wire Distribution Feeders with Reactive Power Control

    Hidenori Tanaka, Toshihiko Tanaka, Takaaki Wakimoto, Eiji Hiraki, Masayuki Okamoto

    2013 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   5158 - 5164   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, we propose a new control algorithm to reduce the capacity of a previously proposed smart charger for electric vehicles (EVs) on single-phase three-wire distribution feeders with reactive power control. The basic principle of the proposed control algorithm is discussed in detail. It is shown that controlling the reactive power on the source side reduces the capacity of the previously proposed smart charger. A digital computer simulation is implemented to confirm the validity of the proposed control algorithm using PSIM software. A prototype experimental model is also constructed and tested. Experimental results demonstrate that balanced source currents with a power factor of 0.9, which is acceptable for Japanese home appliances, are obtained on the secondary side of the pole-mounted distribution transformer during both the battery charging and discharging operations in EVs. This reduces the capacity of the smart charger by 32% compared with that of the smart charger with the previously proposed control algorithm.

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  • Ubiquitous Power for Sectional Compact Emergency Shelter

    Toshihiko Tanaka, Keiichi Kato, Shinichi Noriyasu, Eiji Hiraki, Makoto Koganei, Fusanori Miura, Masayuki Okamoto

    2013 IEEE ECCE ASIA DOWNUNDER (ECCE ASIA)   404 - 408   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a mobile power for the Sectional Compact Emergency Shelter (SCES), which is used for the field hospitals, disaster response offices, and so on under the great disaster. The proposed mobile power consists of the fuel cells (FCs), photovoltaic cells (PVs) and lead-acid batteries. All of the power resources and necessary electrical equipments are constructed in a container car. Therefore, the constructed mobile power is easily moveable and constructive with the SCESs. The FCs can supply power continuously. The PVs are installed on the roof of SCES. The generated power from the PVs is fluctuated by weather conditions. Thus, the lead-acid batteries are installed for levering the difference between the generated power and consumed power in the SCES. The basic principle of the proposed ubiquitous power is discussed in detail, then confirmed by digital computer simulation using PLECS software. The simulation results demonstrate that the ubiquitous power can supply the power to the SCES continuously in winter in Japan. It is concluded that the proposed ubiquitous power is the good solution for power supply of SCES under the great disaster with the SCES.

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  • Constant DC Capacitor Voltage Control Based Strategy for Active Load Balancer in Three-phase Four-wire Distribution System

    Tint Soe Win, Eiji Hiraki, Masayuki Okamoto, Seong Ryong Lee, Toshihiko Tanaka

    2013 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS)   1560 - 1565   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Three-phase four-wire distribution systems are widely used in many countries. These power distribution systems are used for both three-phase three-wire loads and single-phase two-wire consumer appliances in South Korea, Myanmar and other countries. Unbalanced load conditions always occur in three-phase four-wire distribution systems. These unbalanced load conditions cause unbalanced voltages for three-phase and single-phase loads, and increase the loss in the distribution transformer. In this paper, we propose an active load balancer (ALB) based on constant DC capacitor voltage control for three-phase four-wire distribution systems. Constant DC capacitor voltage control is always used in active power line conditioners. The proposed control algorithm does not require any computation blocks to calculate the active and reactive currents on the distribution system. Balanced source currents with a unity power factor are obtained without any calculation blocks of the unbalanced active and reactive components on the load sides. The basic principle of the constant DC capacitor voltage control based strategy for the ALB is discussed in detail and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is also constructed and tested to validate the feasibility of the proposed control algorithm. Simulation and experimental results demonstrate that the proposed ALB can balance the source currents with a unity power factor for a three-phase four-wire distribution system.

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  • A Study on GaN Inverter Based MHz Frequency Induction Heating for Tiny Metals

    Naoki Yamamoto, Eiji Hiraki, Toshihiko Tanaka, Yukiharu Yamada, Tatsuya Nagao, Yasuhiro Miyake

    39TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2013)   5023 - 5027   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The anxiety of merging tiny materials and resin materials in the manufacturing process has become one of the serious issues because it may become cause of overheat such as lithium-ion batteries, flat panel displays, and so on. Therefore, a study on detecting method of the tiny metals is a significant issue. A combination of high-frequency induction heating and thermal detection method is one of the useful approaches. In this paper, MHz-frequency GaN inverter based IH system is built and tested to verify heating size limitation of the tiny metals. Furthermore, the validity of the proposed method to detect the tiny metals by proposed IH thermal technique is evaluated and discussed in detail.

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  • 変換器容量低減を目的とした電気自動車用スマートチャージャの制御法

    田中秀典, 脇本貴章, 平木英治, 田中俊彦, 岡本昌幸

    電気学会全国大会講演論文集   2013 ( 4 )   2013年

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  • プラスチック中における微小金属の高周波誘導加熱手法

    山本直樹, 平木英治, 田中俊彦, 山田幸治, 長尾達也, 三宅泰弘, 野田勇二郎

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • 三相AC-ACダイレクトコンバータにおける負荷等価回路の検討

    松井光生, 平木英治, 田中俊彦, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • ノーマリオンGaN HEMT用共振形ゲートドライブ回路

    石橋卓治, 平木英治, 田中俊彦, 岡本昌幸, 橋詰保, 岡本昌幸, 橋詰保

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • 直列共振型マルチ出力高周波インバータの出力制御特性

    田中裕高, 平木英治, 田中俊彦, 岡本昌幸

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   64th   2013年

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  • Resonant Gate Driver for Normally-On GaN High-Electron-Mobility Transistor

    Takaharu Ishibashi, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Tetsu Kachi

    2013 IEEE ECCE ASIA DOWNUNDER (ECCE ASIA)   365 - 371   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Wide bandgap semiconductors, such as silicon carbide (SiC) and gallium nitride (GaN), are promised materials for next-generation power devices. The authors have recently fabricated a GaN-based high-electron-mobility transistor (HEMT), which is a normally-on device, for power electronics application. However, the power consumption in the constructed gate drive circuit increases when the GaN HEMT is used under higher-frequency operation. A new gate drive circuit with lower power consumption for the normally-on GaN HEMT is strongly required. In this paper, a new resonant gate drive circuit, which is most suitable for the newly fabricated GaN HEMT, is proposed. The validity and high practicability of the proposed resonant gate drive circuit are demonstrated by simulation and experimental results.

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  • Experimental Validation of Newly Fabricated Normally-On GaN High-Electron-Mobility Transistor

    Takaharu Ishibashi, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Daigo Kikuta, Tetsu Kachi

    2013 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   1584 - 1591   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Wide bandgap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) are the promising materials for next-generation power devices. A normally-on GaN-based high-electron-mobility transistor (GaN HEMT) has been fabricated for power electronic converters. In this study, the current collapse phenomena, which are distinctive characteristics of GaN devices, are evaluated in detail under several voltages with two switching frequencies. Prototype circuits for a boost-type dc-dc converter and a single-phase full-bridge inverter, which use the newly fabricated GaN HEMT, are constructed and tested. The experimental results demonstrate that the newly fabricated normally-on GaN HEMT with the previously proposed gate drive circuit is suitable for use as a next-generation power device.

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  • 磁界共鳴型非接触給電用高周波駆動GaNインバータ

    吉澤圭祐, 平木英治, 田中俊彦, 岡本昌幸

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   64th   2013年

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  • Sepic と Zeta コンバータの特性評価

    中本 貴之, 廣川 貴之, 平木 英治, 岡本 昌幸, 田中 俊彦

    パワーエレクトロニクス学会誌   39   188 - 188   2013年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.39.188

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  • A New Current Control Strategy Based on the Internal Model Principle for a Current Balancer in Single-Phase Three-Wire Distribution Systems

    Yusuke Baba, Yuji Wakasa, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto, Seong Ryong Lee

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   8   S95 - S101   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    This paper proposes a new current control strategy that is based on the internal model principle for a current balancer in single-phase three-wire distribution systems. The proposed current control strategy includes a sinusoidal reference input model to achieve the zero steady-state error tracking. The appropriate control gains of this control strategy can be systematically determined by using a state-feedback controller design method via linear matrix inequalities. The basic principle of the proposed control strategy is discussed in detail, and then confirmed by digital computer simulation using the PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that zero steady-state error tracking is achieved by the proposed control strategy. Also, balanced source currents are obtained on the secondary side of a pole-mounted distribution transformer while the load conditions are unbalanced. (c) 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.21924

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  • Dual-Frequency Multiple-Output Resonant Soft-Switching Inverter for Induction Heating Cooking Appliances

    Takayuki Hirokawa, Eiji Hiraki, Toshihiko Tanaka, Makoto Imai, Kenji Yasui, Shinichiro Sumiyoshi

    39TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2013)   5028 - 5033   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, a multiple-output high-frequency soft switching inverter is presented for home and business use "all metal" IH cooking appliances. The frequency and handling power of each output can be selected and regulated individually. The proposed inverter is composed of two single high-frequency circuit cells which are connected in parallel. Therefore, the number of switching devices in the proposed inverter can be significantly reduced. The simulation and experimental results indicate that the proposed circuit is suitable for the multiple output IH concepts such as free-zone induction heating, multi burner type cooking set-up and so on.

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  • マルチ出力可能なIHクッキングヒータ用高周波インバータ

    廣川貴之, 平木英治, 田中俊彦, 今井慎, 安井健治, 住吉眞一郎

    電気学会全国大会講演論文集   2013 ( 4 )   2013年

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  • 福山太陽光発電所の公開発電データを用いたメガソーラ発電所の発電コストの試算

    宅野和大, 平木英治, 田中俊彦, 岡本昌幸

    電気学会全国大会講演論文集   2013 ( 7 )   2013年

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  • 非同期絶縁型双方向dc-dcコンバータの制御特性

    岩田啓, 穐吉啓史, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2013 ( 4 )   2013年

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  • 変換器容量低減を目的とした電気自動車用スマートチャージャの制御法

    田中秀典, 脇本貴章, 平木英治, 田中俊彦, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • エネルギー利用を想定した特徴的な電力変換回路

    寺園勝志, 入江寿一, 村上哲, 荻原弘之, 木船弘康, 平木英治, 三島智和, 斉藤亮治, 米森秀登

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • 無効電力調整によるPV発電導入時の電圧上昇抑制法

    脇本貴章, 平木英治, 田中俊彦, 川原耕治, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2013   2013年

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  • ノーマリオン形GaN HEMT用共振形ゲートドライブ回路の実験的検証

    石橋卓治, 平木英治, 田中俊彦, 岡本昌幸, 岡本昌幸, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気学会全国大会講演論文集   2013 ( 4 )   2013年

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  • 微小金属の高周波誘導加熱手法の検討

    山本直樹, 平木英治, 田中俊彦, 山田幸治, 長尾達也, 三宅泰弘

    電気学会全国大会講演論文集   2013 ( 4 )   2013年

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  • 戸建てシェルタ用ユビキタス電源

    乗安信一, 加藤慶一, 平木英治, 田中俊彦, 小金井真, 三浦房紀, 岡本昌幸

    電気学会全国大会講演論文集   2013 ( 7 )   2013年

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  • A starting method of the harmonic current compensator using a hybrid active filter for wind power generation systems with soft starters

    Hiroaki Yamada, Eiji Hiraki, Toshihiko Tanaka

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   7   S139 - S145   2012年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    This paper proposes a starting method of the harmonic current compensator using a hybrid active filter for wind power generation systems. The active filter (AF) in the proposed method of the hybrid power filter behaves as a resistor and reactive power compensator to suppress the inrush current and leading currents for the passive filter (PF) under the starting condition. The basic principle of the proposed starting method is discussed, and then confirmed by digital computer simulation using PSCAD/EMTDC. Simulation results demonstrate that the proposed starting method can overcome the inrush and leading currents for the PF, building up the DC capacitor voltage of the AF. IEEJ Trans 2011 DOI: 10.1002/tee.21815

    DOI: 10.1002/tee.21815

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  • Topology for Current Balancer with Half-Bridge Inverters in Single-Phase Three-Wire Distribution Systems with DC-Capacitor-Voltage Balancer

    Yusuke Baba, Kazuya Sugahara, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

    ELECTRICAL ENGINEERING IN JAPAN   180 ( 4 )   38 - 46   2012年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    This paper proposes a new topology for a current balancer with half-bridge inverters in single-phase three-wire distribution systems. Two half-bridge inverters are connected to the sources. The midpoint of the two capacitors on the DC-side is connected to a neutral line. The two half-bridge inverters function as a current balancer for single-phase three-wire distribution systems by exchanging the active and reactive power on each feeder through the two DC capacitors. The third leg functions as a DC-capacitor-voltage balancer for two DC capacitors connected to the half-bridge inverters. Thus, balanced source voltages and currents are obtained on the secondary side on the pole-mounted distribution transformer with balanced DC-capacitor voltages. The basic principle of the proposed current balancer is discussed in detail, and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results show that balanced source voltages and currents are obtained on the secondary side on the pole-mounted distribution transformer with balanced DC-capacitor voltages. (C) 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 180(4): 38-46, 2012; Published online in Wiley Online Library (wileyonlinelibrary. com). DOI 10.1002/eej.22277

    DOI: 10.1002/eej.22277

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  • 内部モデル原理に基づく単相三線式配電用電流バランサの制御法 (電子通信エネルギー技術)

    馬場 雄介, 若佐 裕治, 平木 英治

    電子情報通信学会技術研究報告 : 信学技報   112 ( 167 )   69 - 74   2012年7月

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    記述言語:日本語   出版者・発行元:電子情報通信学会  

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  • IHクッキングヒータ用時分割制御高周波インバータの小型化に関する検討

    廣川 貴之, 平木 英治, 田中 俊彦, 岡本 昌幸

    電気学会研究会資料. SPC, 半導体電力変換研究会   2012 ( 96 )   81 - 85   2012年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    筆者らは先に2台の1石型高周波インバータを並列接続した回路構成のIHクッキングヒータ用時分割制御高周波インバータを提案し,実証評価を行ってきた.本稿では2台のインバータ内のインダクタを結合させることによる回路の小型化について検討したので報告する.

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  • 立体駐車場非接触給電システム用高周波リンクAC-ACコンバータの実証評価

    河野 真吾, 平木 英治, 田中 俊彦, 岡本 昌幸

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   112 ( 167 )   15 - 20   2012年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    筆者らは,PHVの普通充電を想定した商用ACを供給する非接触給電システムを検討しており,これまで商用ACから直接高周波ACへの変換を単純な回路構成で実現可能な高周波リンクAC-ACコンバータを提案し,シミュレーションを中心に評価してきた.本稿では,試作実験により動作特性および電力変換特性について評価したので報告する.

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  • 高速スイッチング動作を実現するノーマリオン形GaN HEMT (半導体電力変換 モータドライブ合同研究会・半導体電力変換一般およびACドライブ)

    石橋 卓治, 豊田 玄紀, 平木 英治

    電気学会研究会資料. MD   2012 ( 17 )   29 - 34   2012年6月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • 電動式射出成形機用電力ピークカット装置の制御法 (半導体電力変換 モータドライブ合同研究会・半導体電力変換一般およびACドライブ)

    穐吉 啓史, 平木 英治, 田中 俊彦

    電気学会研究会資料. MD   2012 ( 17 )   75 - 80   2012年6月

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    記述言語:日本語   出版者・発行元:電気学会  

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  • 単相高周波AC-ACダイレクトコンバータの最適設計法 (スイッチング電源,家庭向け情報通信機器等のエネルギー有効利用技術および家電・民生技術,一般)

    松井 光生, 平木 英治, 田中 俊彦

    電気学会研究会資料. HCA   2012 ( 17 )   41 - 46   2012年5月

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    記述言語:日本語   出版者・発行元:電気学会  

    近年,高周波誘導加熱(IH: Induction Heating)は,特に産業応用分野において材料の加熱,加工という枠を超えて,過熱水蒸気発生システムなど流体加熱への応用が活発に行われている.本稿では,商用ACから直接高周波ACへの変換を行うIH用単相高周波AC-ACダイレクトコンバータにおいて,広いソフトスイッチング動作領域を確保する最適回路設計法について検討している.

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  • 直流キャパシタ電圧一定制御を用いた単相三線式配電用電流バランサの制御法

    馬場 雄介, 岡本 昌幸, 平木 英治, 田中 俊彦, LEE Seong Ryong

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   132 ( 5 )   581 - 587   2012年5月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a strategy based on constant dc-capacitor voltage control for a current balancer in single-phase three-wire distribution systems. The proposed control strategy involves the use of only the constant dc-capacitor voltage control block commonly used in active power conditioners for the calculation of the compensation current. No calculation block is required to obtain the reactive and unbalanced-active components. Thus, we provide the simplest possible control strategy for the current balancer. The basic principle of the proposed control method is discussed in detail and its validity, which is confirmed by a digital computer simulation using PSIM software, is shown. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents with a power factor of unity are obtained on the secondary side of a pole-mounted distribution transformer while unbalanced load current conditions with a lagging power factor are retained.

    DOI: 10.1541/ieejias.132.581

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  • A constant DC voltage control-based strategy for an active power quality compensator in electrified railways with improved response

    Norio Ishikura, Keisuke Ishibashi, Eiji Hiraki, Toshihiko Tanaka

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   7 ( 3 )   316 - 321   2012年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    This paper proposes a constant DC voltage control-based strategy for an active power quality compensator (APQC) used in electrified railways. The proposed strategy consists of only an I-PD-based constant DC capacitor voltage control with an added moving-average type low-pass filter (LPF). The added LPF improves the response of the constant DC capacitor voltage control for the APQC. Thus we offer the simplest control method for the APQC used in electrified railways with improved response. The basic principle of the proposed control strategy is discussed in detail, and then confirmed by digital computer simulation using the PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents with unity power factor are obtained on the primary side of the Scott transformer in the traction substation systems, improving the response by one-fourth as compared to that of the previously proposed control method. (C) 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.21733

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  • NEアカデミー とことん基礎から理解する "磁界共鳴"型ワイヤレス給電(最終回)オシロスコープとVNAを使い分ける

    粟井 郁雄, 平木 英治

    日経エレクトロニクス   ( 1076 )   100 - 110   2012年2月

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    記述言語:日本語   出版者・発行元:日経BP社  

    "磁界共鳴型"ワイヤレス給電システム(WPT)の技術分野は、通信技術分野と電源回路技術分野の中間的な位置にある 。このため、システムの解析に用いる測定器も、その対象や目的ごとに、ベクトル・ネットワーク・アナライザ(VNA)と、オシロスコープを適切に使い分ける必要が出てくる。

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    その他リンク: http://bizboard.nikkeibp.co.jp/houjin/cgi-bin/nsearch/md_pdf.pl/0000317303.pdf?NEWS_ID=0000317303&CONTENTS=1&bt=NE&SYSTEM_ID=HO

  • 新開発GaN HEMTのスイッチング特性

    石橋卓治, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • Performance Analysis for High-Frequency link AC-AC Contact-less Power Supply System in Parking Tower

    Shingo Kawano, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto

    38TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2012)   645 - 650   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In tandem with the penetration of PH V as well as EV, contact-less power supply system in parking towers have become important subjects. In parking towers, EV and PHV are charged on the traveling pallets, supply power is to be transmitted from the building to travelling pallets. In this paper, high-frequency link AC-AC converter for contact-less power supply system in parking tower is newly proposed and its basic operation and performance have been demonstrated from computer aided simulation and experiment.

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  • Smart Charger for Electric Vehicles with Power Quality Compensator on Single-Phase Three-Wire Distribution Feeders

    Toshihiko Tanaka, Tsukasa Sekiya, Hidenori Tanaka, Eiji Hiraki, Masayuki Okamoto

    2012 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   3075 - 3081   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, we propose a smart charger for electric vehicles (EVs) with a power quality compensator. The proposed smart charger consists of four-leg IGBTs. Three legs are used for a single-phase full-bridge-based PWM rectifier, which converts power from ac to de during the battery-charging operation, or from de to ac during the battery-discharging operation. This PWM rectifier can compensate reactive and unbalanced active currents on single-phase three-wire distribution systems because the third leg is connected to the neutral line of singlephase three-wire distribution feeders. The fourth leg is used as a bidirectional dc-de converter for battery-charging and discharging operations. The three-leg PWM rectifier uses only constant dc-capacitor voltage control, which is commonly used in active power line conditioners. Thus, the authors have developed the simplest possible control method for a single-phase power quality compensator. The basic principle of the proposed smart charger is discussed in detail, and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents are obtained on the secondary side of the pole-mounted distribution transformer for battery-charging and discharging operations.

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  • Peak Power Shaving of an Electric Injection Molding Machine with Supercapacitors

    Hirofumi Akiyoshi, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto, Tadayoshi Matsuo Eiji Hiraki, Kiyoshi Ochi

    2012 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   2590 - 2595   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, we propose the control method of a peak shaving system for an electric injection molding machine (EIMM). The peak power shaver consists of a multiphase bidirectional dc-dc converter and supercapacitors (SCs), and is connected to a dc link of the inverter fed injection motor drive system of the EIMM. In the proposed control method, electric power is stored in the SCs through the multiphase bidirectional dc-dc converter with a PWM rectifier while the injection motor is at rest. When the injection motor is accelerating, the stored power in the SCs together with the power from the distribution feeders is supplied to the injection motor. Thus, the peak power can be shaved. The basic principle of the proposed control method is discussed in detail, then confirmed by digital computer simulation and experimental setup. The simulation and experimental results demonstrate that the peak power is shaved by 70% using the peak power shaving system.

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  • 立体駐車場非接触給電システム用高周波リンクAC-ACコンバータの実証評価

    河野 真吾, 平木 英治, 田中 俊彦, 岡本 昌幸

    電気学会研究会資料. SPC, 半導体電力変換研究会   2012 ( 96 )   15 - 20   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • High Frequency-link AC-AC Wire-less Power Supply System in Parking Tower

    Eiji Hiraki, Shingo Kawano, Toshihiko Tanaka, Masayuki Okamoto

    2012 15TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (EPE/PEMC)   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In tandem with the penetration of PHV as well as EV, wire-less power supply system in parking towers have become important subjects. In parking towers, EV and PHV are charged on the traveling pallets, supply power is to be transmitted from the building to travelling pallets. In this paper, high frequency link AC-AC converter for non-contact power supply system in parking tower is newly proposed and its basic operation performance have been demonstrated from computer aided simulation and experiment.

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  • The Practical Evaluations of Time-Sharing High-Frequency Resonant Soft-Switching Inverter for All Metal IH Cooking Appliances

    Takayuki Hirokawa, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto, Mutsuo Nakaoka

    38TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2012)   3302 - 3307   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper represents the practical evaluations of time-sharing high-frequency resonant soft-switching inverter composed of two multi-resonant sub inverter cells in parallel for common series resonant load for all metal induction heating (IH) cooking appliances. Together with a fixed switching frequency resonant current, IH power regulation is carried out by phasor angle control scheme with phase-shifted PWM scheme. In particular, this high-frequency multi-resonant inverter can efficiently operate under the conditions of load resonant frequency changing mode; frequency doubler mode (100 kHz) for low resistivity metal IH loads and fundamental switching frequency mode (50 kHz) for high resistivity metal IH loads, respectively. The feasible performance of the time-sharing high-frequencys inverter are demonstrated and discussed in detail.

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  • 家電分野における商用電源インターフェイス技術動向

    芳賀仁, 岩谷一生, 黒川不二雄, 住吉眞一郎, 平木英治

    電気学会産業応用部門大会(CD-ROM)   2012   2012年

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  • 同期モータ駆動システムシミュレータによる損失推定

    平岡崇, 平木英治, 田中俊彦, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2012   2012年

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  • 無効電力と不平衡有効電力補償機能を有する電気自動車用スマートチャージャ

    田中秀典, 平木英治, 田中俊彦, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2012   2012年

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  • ノーマリオン形GaN HEMT用共振形ゲートドライブ回路

    石橋卓治, 豊田玄紀, 平木英治, 田中俊彦, 岡本昌幸, 岡本昌幸, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   63rd   2012年

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  • 無効電力と不平衡有効電力補償機能を有する電気自動車用スマートチャージャ

    田中秀典, 関谷司, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • マルチレベルインバータを用いた無効電力補償装置の新しい制御法

    伊藤北斗, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • IH応用を目的としたチャージブースト型フルブリッジ高周波インバータのDCバスライン電圧算出法

    田中裕高, 平木英治, 田中俊彦, 岡本昌幸

    電気学会産業応用部門大会(CD-ROM)   2012   2012年

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  • 戸建てシェルタ用ユビキタス電源

    加藤慶一, 平木英治, 田中俊彦, 小金井真, 三浦房紀, 岡本昌幸

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   63rd   2012年

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  • 福山太陽光発電所の発電データの検証

    宅野和大, 平木英治, 田中俊彦, 岡本昌幸, 庄野弘高

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   63rd   2012年

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  • インダクタを結合した構造を有するIHクッキングヒータ用時分割制御高周波インバータの実証評価 (第195回定例研究会)

    廣川 貴之, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   38   141 - 148   2012年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    This paper represents the practical evaluations of an improved time-sharing high-frequency resonant soft-switching inverter for all metal induction heating (IH) cooking appliances. By introducing inductor coupling technology, the number of the circuit components and a physical volume of the circuit can be reduced. A design procedure of the coupling inductor is discussed in detail. Furthermore, two IH power regulation sequences; phase shifted PWM and PAM are compared to the viewpoint of the power conversion efficiency.

    DOI: 10.5416/jipe.38.141

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  • 新開発GaN HEMTを用いたインバータ回路

    豊田玄紀, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • IHクッキングヒータ用時分割制御高周波インバータの実証評価

    廣川貴之, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • 正弦波PWMインバータのロバスト制御器設計法の実験的検証

    馬場雄介, 若佐裕治, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • 立体駐車場非接触給電システム用高周波リンクAC-ACコンバータの実験的検証

    河野真吾, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2012 ( 4 )   2012年

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  • 無効電力と不平衡有効電力補償機能を有する電気自動車用スマートチャージャ (電子通信エネルギー技術)

    田中 秀典, 関谷 司, 岡本 昌幸, 平木 英治, 田中 俊彦

    電子情報通信学会技術研究報告 : 信学技報   111 ( 305 )   25 - 29   2011年11月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年,電気自動車が本格的な普及期を迎えている。日産リーフのバッテリは,24kWhの電力を貯蔵可能である。この利点を活かし,電力需要が高くなる時間帯に使用することでピークカットを実現するプロジェクトが注目されている。このような用途では,双方向な充電器が必要なためPWM整流器と双方向チョッパが用いられている。本論文では,電気自動車用充電器に無効電力と不平衡有効電力補償機能を有する電気自動車用スマートチャージャを提案し,その有効性を計算機シミュレーションにより確認したので報告する。

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  • パワーデカップリング機能を有するハーフブリッジインバータを用いた単相三線式配電用電流バランサの制御法 (電子通信エネルギー技術)

    馬場 雄介, 岡本 昌幸, 平木 英治

    電子情報通信学会技術研究報告   111 ( 161 )   37 - 42   2011年7月

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    記述言語:日本語   出版者・発行元:電子情報通信学会  

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  • 直流電圧平衡化回路を有するハーフブリッジインバータを用いた単相三線式配電用電流バランサ

    馬場 雄介, 菅原 和也, 岡本 昌幸, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   131 ( 7 )   880 - 887   2011年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new topology for a current balancer with half-bridge inverters in single-phase three-wire distribution systems with a three-leg inverter. Two half-bridge inverters are connected to the sources. The midpoint of two capacitors on the DC-side is connected to a neutral line. The two half-bridge inverters perform a current balancer for single-phase three-wire distribution systems by exchanging the active and reactive power on the each feeder through the two DC-capacitors. The third-leg performs a DC-capacitor-voltage balancer for the two DC-capacitors connected to the half-bridge inverters. Thus, balanced source voltages and currents are obtained on the secondary-side on the pole-mounted distribution transformer with balanced DC-capacitor voltages. The basic principle of the proposed current balancer is discussed in detail, and then, confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results show that balanced source voltages and currents are obtained on the secondary-side on the pole-mounted distribution transformer with balanced DC-capacitor voltages.

    DOI: 10.1541/ieejias.131.880

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  • 高い降圧比を有するインダクタ結合形DC-DCコンバータにおける出力電圧リプルの低減 (家電・民生研究会・スイッチング電源,家庭向け情報通信機器のエネルギー技術,一般)

    渡辺 潤, 岡本 昌幸, 平木 英治

    電気学会研究会資料. HCA   2011 ( 13 )   41 - 46   2011年5月

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    記述言語:日本語   出版者・発行元:電気学会  

    近年,高性能CPUの駆動電圧は低電圧化の傾向がある.このため,これらのCPUに電力を供給するDC-DCコンバータには高い降圧比が要求される.筆者らは先に,結合インダクタを有する降圧形DC-DCコンバータを提案し,その有効性をシミュレーションおよび実験により評価・検討してきた.提案回路はスイッチング素子のduty飴ctorが大きくても高い降圧比を実現できるが,出力電圧に大きなリプルが重畳する問題があった.本稿ではこの問題に対する原因を明らかにし,実験により出力電圧リプル低減効果を評価したので報告する.

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  • A New V-connection Inverter with the Reduced-Capacity DC Capacitors for DC Micro-Grid

    朴 善英, 馬場 雄介, 岡本 昌幸, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2011 ( 1 )   23 - 27   2011年1月

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  • A Large-Capacity Capacitor Simulator with an Inner-Series Resistor

    Toshihiko Tanaka, Atsushi Tanaka, Masayuki Okamoto, Eiji Hiraki

    IECON 2011: 37TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY   1052 - 1057   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a universal large-capacity capacitor simulator. The proposed simulator consists of a main electrolytic capacitor and three-leg IGBTs. One leg of the IGBTs acts as a bidirectional dc-dc converter. The other two legs are used for a single-phase PWM rectifier. In the capacitor-charging operation, the bidirectional dc-dc converter is used as a boost converter. Most of the power supplied by the load is injected to the utility through the single-phase PWM rectifier. In the capacitor discharging-operation, the bidirectional dc-dc converter acts as a buck converter. Most of the power supplied to the load is from the utility through the single-phase PWM rectifier. A new control method, which can perform an inner-series resistor in a supercapacitor (SC), is also proposed for an SC simulator. The basic principle of the proposed capacitor simulator is discussed in detail. The validity and high applicability of the proposed large-capacity capacitor simulator are confirmed using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that the proposed capacitor simulator acts both as an ideal large-capacity capacitor and as an SC with an inner-series resistor.

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  • GaN HEMTのスケールアップモデルとスイッチング特性

    豊田玄紀, 豊田玄紀, 岡本昌幸, 岡本昌幸, 平木英治, 平木英治, 田中俊彦, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気学会産業応用部門大会(CD-ROM)   2011   2011年

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  • 直流キャパシタ電圧一定制御を用いた単相三線式配電用電流バランサの制御法

    馬場 雄介, 岡本 昌幸, 平木 英治, 田中 俊彦, 福井 博一

    電気学会研究会資料. SPC, 半導体電力変換研究会   2011 ( 1 )   1012 - 1017   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • A Novel Type Time-Sharing High-Frequency Resonant Soft-Switching Inverter for All Metal IH Cooking Appliances

    Takayuki Hirokawa, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

    IECON 2011: 37TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY   2526 - 2532   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, a novel type time-sharing high-frequency resonant soft-switching inverter composed of combining two-phase multi-resonant sub inverter cells in parallel for common series resonant tank load is demonstrated originally for all metal induction heating cooking appliances, together with a fixed output frequency resonant current phasor angle control scheme by phase-shifted PWM which is suitable for high frequency power regulation. In particular, this high-frequency multiresonant inverter with lossless snubbing capacitors for ZVS can efficiently operate under the conditions of load resonant frequency changing mode; frequency doubler mode(100kHz) and switching frequency mode(50kHz) for low resistivity metal IH and high resistivity metal IH loads, respectively. The feasible operating performances of experimental setup implementation are evaluated and discussed in detail. The practical effectiveness of this high frequency resonant inverter is confirmed for all metal IH cooking appliances on the basis of simulation and experimental results.

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  • Loss Evaluation of an AC-AC Direct Converter with a New GaN HEMT SPICE Model

    Masayuki Okamoto, Genki Toyoda, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Tetsu Kachi

    2011 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   1795 - 1800   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Wide-band-gap semiconductors, such as gallium nitride (GaN) and silicon carbide (SiC), are expected to be used as materials for new switching devices with low loss and high switching speed. The authors have recently developed a GaN-based high-electron-mobility-transistor (HEMT) for application to power electronics. In this paper we present models of a GaN-based transistor and Schottky barrier diode (SBD) for a simulation program with integrated circuit emphasis (SPICE). The results of the SPICE simulation show that the static and dynamic characteristics of GaN- based devices are precisely simulated by the SPICE models. The application of a GaN-based device to a single-phase AC-AC direct converter results in a reduction of power loss of over 30% compared with a silicon-based one.

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  • 直流電圧一定制御を用いた単相三線式配電用電流バランサの制御法

    馬場 雄介, 福井 博一, 岡本 昌幸, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   36 ( 36 )   168 - 168   2011年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.36.168

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  • 非接触給電用高周波電力変換回路のシミュレーション評価

    河野 真吾, 岡本 昌幸, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   36 ( 36 )   187 - 187   2011年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.36.187

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  • 直列抵抗を模擬可能な大容量キャパシタシミュレータ

    田中 敦士, 岡本 昌幸, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   36 ( 36 )   190 - 190   2011年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe.36.190

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  • A Half-Bridge Inverter Based Current Balancer with the Reduced DC Capacitors in Single-Phase Three-Wire Distribution Feeders

    Yusuke Baba, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

    2011 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)   4233 - 4239   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a half-bridge inverter based current balancer in single-phase three-wire distribution systems with the reduced dc capacitors. The proposed current balancer can use a 6-in-1 IGBT module. Two legs perform a half-bridge inverter based current balancer, which compensates the reactive and unbalanced active components on the source-side. The third-leg performs a power de-coupler with a dc-capacitor voltage balancer. This power de-coupler sinks the power fluctuation, which flows into the dc capacitors, caused by the unbalanced conditions of two half-bridge inverters. Thus the capacity of the dc capacitors of the half-bridge inverter based current balancer can be dramatically reduced as compared to those of the previously proposed current balancer. The basic principle of the proposed half-bridge inverter based current balancer with the reduced dc capacitors is discussed in detail, and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that the balanced source currents are obtained on the secondary-side of the pole-mounted distribution transformer, reducing the capacity of the dc capacitors of the half-bridge inverter based current balancer.

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  • 立体駐車場非接触給電システム用周波リンクAC-ACコンバータ

    河野真吾, 岡本 昌幸, 平木 英治, 田中 俊彦

    信学技報, IEICE Technical Report   2011 ( 305(EE2011 24-30) )   7 - 12   2011年

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年のEVやPHVの普及に伴い,立体駐車場での充電が必要となってきた.立体駐車場では,車両の乗ったパレットが移動を行うため,立体駐車場ビル本体からパレットを介して車両を充電することになる.本稿では,ビル本体に設置された電源系統からパレットヘ200V/60(50)Hzの商用交流を非接触で供給する高周波リンクAC-ACコンパータを提案し,実験とシミュレーションにより有用性を明らかにする.

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  • 学界情報 国際会議レポート:The 36th Annual Conference of the IEEE Industrial Electronics Society (IECON2010) November 7 - 10, 2010, Glendale, USA

    平木 英治

    電気学会論文誌. D, 産業応用部門誌   131 ( 3 )   NL3_4   2011年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    DOI: 10.1541/ieejias.131.NL3_4

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  • IHクッキングヒータ用チャージブースト型2出力フルブリッジインバータの実証評価

    銭谷 紳, 岡本 昌幸, 平木 英治, 田中 俊彦, 定方 秀樹, 藤田 篤志, 中岡 睦雄

    パワーエレクトロニクス学会誌   36 ( 36 )   103 - 109   2011年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    In this paper, a multi output high frequency soft switching inverter topology is presented for home use IH cooking appliances. The proposed inverter system is comprised of simple power circuitry and unique control scheme. The detailed analysis shows that the proposed inverter has low harmonic distortion, low switching losses and wide output powerrange. A detailed PWM procedure is illustrated as well. Through simulation and experimental results, the proposed IH system is verified.

    DOI: 10.5416/jipe.36.103

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  • 電気自動車用スマートチャージャ

    田中秀典, 関谷司, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • マルチレベルインバータを用いた無効電力補償装置

    伊藤北斗, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • 高周波ソフトスイッチングハーフブリッジインバータにおける寄生インダクタンスを考慮した動作解析

    松井光生, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • 高い降圧比を有するインダクタ結合形DC-DCコンバータの損失分析

    渡辺潤, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • スイッチング損失の低減を目的としたIHクッキングヒータ用時分割制御高周波インバータ

    廣川貴之, 岡本昌幸, 平木英治, 田中俊彦, 中岡睦雄

    電気学会産業応用部門大会(CD-ROM)   2011   2011年

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  • 移動平均フィルタを用いた三相PLL

    穐吉啓史, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • 立体駐車場非接触給電システムにおける非接触トランスの検討

    河野真吾, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • GaNデバイス用高速ドライブ回路の開発

    石橋卓治, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011年

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  • 絶縁型双方向DC-DCコンバータにおける電圧振動低減法

    平生和雅, 岡本昌幸, 平木英治, 田中俊彦

    電気学会産業応用部門大会(CD-ROM)   2011   2011年

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  • 大規模災害対応早期設置型戸建シェルタへの応用を目的としたユビキタスパワー

    加藤慶一, 岡本昌幸, 平木英治, 田中俊彦, 小金井真, 三浦房紀

    電気学会産業応用部門大会(CD-ROM)   2011   2011年

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  • パワーデカップリング機能を有する単相三線式配電用電流バランサの制御法

    馬場雄介, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • 戸建てシェルタへの応用を目的としたDGマイクログリッドを中核とするユビキタスパワーの構築

    加藤慶一, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 7 )   2011年

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  • Add-on式回生エネルギー回収装置を用いた電動射出成型機の電力ピークカット効果

    穐吉啓史, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • 高周波誘導加熱用時分割制御高周波インバータのシミュレーションによる動作解析

    廣川貴之, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • GaN横型トランジスタのモデル化とAC-ACダイレクトコンバータへの応用

    豊田玄紀, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • オールディジタル制御三相無効電流発生装置

    橋本覚, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • 非接触給電用アクティブクランプ高周波リンクAC-ACコンバータの動作特性

    河野真吾, 岡本昌幸, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • 産業用高周波誘導加熱を目的とした三相AC-ACダイレクトコンバータの実験的検証

    高原貴昭, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 加地徹

    電気学会全国大会講演論文集   2011 ( 4 )   2011年

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  • 直列抵抗を模擬可能な大容量キャパシタシミュレータの制御法

    田中 敦士, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 10 )   1189 - 1190   2010年10月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new control method for the previously proposed large-capacity capacitor simulator, which can perform an inner series resistor of the EDLCs. In the proposed large-capacity capacitor simulator, one of three legs performs a bi-directional dc-dc converter. The others are used for a single-phase PWM rectifier. In the charging operation of the proposed large-capacity simulator, one-leg is used as a boost converter. Most power, which is stored in the proposed simulator, is injected to the utility through the PWM rectifier. In the discharging operation, the one-leg performs a buck converter. Most power, which is supplied to the load, is from the utility through the PWM rectifier. Thus the proposed simulator performs a large-capacity capacitor with an inner resistor in both charging and discharging operations. The basic principle of the proposed simulator is discussed in detail. The validity and excellent practicability of the proposed control method for the large-capacity capacitor simulator are confirmed using PSIM software.

    DOI: 10.1541/ieejias.130.1189

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  • 絶縁型双方向DC-DCコンバータの動作解析 (電子通信エネルギー技術)

    平生 和雅, 岡本 昌幸, 平木 英治

    電子情報通信学会技術研究報告   110 ( 151 )   23 - 28   2010年7月

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    記述言語:日本語   出版者・発行元:電子情報通信学会  

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  • 結合インダクタを有する降圧形DC-DCコンバータの動作解析

    渡辺 潤, 岡本 昌幸, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2010 ( 99 )   105 - 110   2010年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年,高性能CPUの駆動電圧は低電圧化の傾向がある.このため,これらのCPUに電力を供給するDC-DCコンバータには高い降圧比が要求される.本稿では,結合インダクタを有する降圧形DC-DCコンバータを提案する.提案回路は高い降圧比を実現し,さらにスイッチング素子に流れる電流ピークやダイオードにかかる電圧ストレスを抑制することが可能である.提案回路の回路動作を明らかにし,動作特性をシミュレーションおよび試作実験により評価・検討する.

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  • 直流電圧一定制御を用いた単相三線式配電用電流バランサの制御法

    福井 博一, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 7 )   935 - 936   2010年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper deals with applying the constant dc voltage control based algorithm to the current balancer in single-phase three-wire secondary distribution systems. The power flows into a three-leg inverter, which performs the current balancer, are discussed, and then we show that only the reactive power flows into the three-leg inverter. This demonstrates that the required-capacity of the dc capacitor can be reduced as compared to that of the active power quality compensator used in the electrified railways. This reduced-capacity dc capacitor results in the rapid and stable balancing. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. Digital computer simulation results demonstrate that the balanced source currents with unity power factor are obtained remaining the unbalanced load currents conditions.

    DOI: 10.1541/ieejias.130.935

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  • 高周波リンク非対称ZCS-PWM制御DC-DCコンバータの実証評価と検討

    三島 智和, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 5 )   605 - 613   2010年5月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a novel Zero Current Switching (ZCS)-PWM controlled half-bridge DC-DC converter with High-Frequency (HF)-link. The newly-proposed soft switching DC-DC converter consists of a multi-resonant half-bridge HF-isolated inverter controlled by an asymmetrical PWM scheme and a center-tapped diode rectifier with a choke input filter. In order to attain the wide range of soft-commutation under the condition of constant switching frequency, the single Active Edge-Resonant Cell (AERC) that is composed of a lossless inductor and a switched resonant capacitor is originally employed for the half-bridge inverter arm, providing and assisting ZCS operations in the switching power devices. The ZCS-PWMDC-DC converter treated here is evaluated in experiments using the 800 W-55 kHz prototype. The practical effectiveness of the proposed soft switching DC-DC converter is actually demonstrated and discussed with the experimental results under open loop and closed loop configurations. Finally, the feasibility of the DC-DC converter topology is discussed from the view points of the high efficiency and high power density.

    DOI: 10.1541/ieejias.130.605

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  • ソフトスタータ付き風力発電システム用ハイブリッドフィルタの始動法

    山田 洋明, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 4 )   574 - 575   2010年4月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new method of starting the hybrid power filter for wind power generation systems with soft starter. In the proposed method, an active filter of the hybrid power filter behaves a resistor for the source current under the starting condition. Thus the inrush phenomena of the passive filter are perfectly suppressed. The basic principle of the proposed starting method is discussed, and then confirmed by digital computer simulation using PSCAD/EMTDC. Simulation results demonstrate that the proposed starting method can overcome the inrush currents for the passive filter, building up the dc voltage of the active filter.

    DOI: 10.1541/ieejias.130.574

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  • 家庭用IH調理器への応用を目的とした簡易型PFC機能を持つ2ステージソフトスイッチング高周波インバータ

    河口 祐樹, 平木 英治, 田中 俊彦, 定方 秀樹, 藤田 篤志, 大森 英樹, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 4 )   450 - 458   2010年4月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In recent years, consumer induction-heating (IH) cooking appliances have grown increasingly popular because of their easy cleaning, high efficiency, safety, and controllability. IH food cooking system for consumer home use are indispensable to heat various metallic pans, such as aluminum, copper, stainless steel, and iron cast for further diffusing. Furthermore, these appliances have to satisfy the utility AC grid harmonics regulations of IEC61000-3-2. To meet these requirements, this paper proposes a two-stage soft-switching high-frequency inverter with simple PFC function that is suitable for consumer IH cooking appliances. The proposed system comprises a soft-switching chopper based boost PFC converter with passive snubber and phase-shifted PWM controlled ZVZCS high-frequency inverter. In order to satisfy the utility AC grid current harmonic regulations, a simple PFC control technique with discontinuous current mode is introduced. This technique as well as the fundamental operating performances of the proposed IH system is tested. The effectiveness of proposed IH system is substantially proved from a practical point of view on the basis of the experimental results.

    DOI: 10.1541/ieejias.130.450

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  • 直流キャパシタ電圧一定制御を用いた電気鉄道用パワーラインコンディショナの制御法 : 過渡応答特性の改善

    石橋 圭介, 石倉 規雄, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2010 ( 34 )   23 - 28   2010年3月

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  • ハーフブリッジインバータを用いた直流電圧平衡機能付き単相三線式配電用電流バランサ

    菅原 和也, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2010 ( 34 )   41 - 46   2010年3月

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  • A High Frequency-Link Bidirectional DC-DC Converter for Super Capacitor-Based Automotive Auxiliary Electric Power Systems

    Tomokazu Mishima, Eiji Hiraki, Mutsuo Nakaoka

    JOURNAL OF POWER ELECTRONICS   10 ( 1 )   27 - 33   2010年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER HEIDELBERG  

    This paper presents a bidirectional DC-DC converter suitable for low-voltage super capacitor-based electric energy storage systems. The DC-DC converter presented here consists of a full-bridge circuit and a current-fed push-pull circuit with a high frequency (HF) transformer-link. In order to reduce the device-conduction losses due to the large current of the super capacitor as well as unnecessary ringing, synchronous rectification is employed in the super capacitor-charging mode. A wide range of voltage regulation between the battery and the super capacitor can be realized by employing a Phase-Shifting (PS) Pulse Width Modulation (PWM) scheme in the full-bridge circuit for the super capacitor charging mode as well as the overlapping PWM scheme of the gate signals to the active power devices in the push-pull circuit for the super capacitor discharging mode. Essential performance of the bidirectional DC-DC converter is demonstrated with simulation and experiment results, and the practical effectiveness of the DC-DC converter is discussed.

    DOI: 10.6113/JPE.2010.10.1.027

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  • 双方向チョッパと単相PWM整流器を用いた大容量EDLCシミュレータ

    田中敦士, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • A Comparative Evaluation of DCM Control and CCM Control for Soft-Switching PFC Converter

    Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Hideki Sadakata, Atsushi Fujita, Hideki Omori, Mutsuo Nakaoka

    IECON 2010: 36TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY   2010年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Harmonic currents generated from the power electric equipment such as IH cooking heaters involve harmful influences to the other equipments connected to the utility grid. As for the IH cooking appliances, adding the PFC converter to the input stage of IH cooking heater is one of the practical solutions to suppress harmonic current influences. In this paper, two operation modes; DCM and CCM for the PFC converter are compared and tested from the view points of magnetic volume and power quality to clarify the suitable operation mode for consumer IH cooking appliance.

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  • Performance Verification of a Novel Soft Switching Three-Phase Utility Frequency AC to High Frequency AC Direct Power Converter with PFC Function for Industrial IH Applications

    Takaaki Takahara, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Tetsu Kachi

    PROCEEDINGS OF 14TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (EPE-PEMC 2010)   2010年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper presents performance characteristics of a novel soft switching three-phase utility frequency AC (UFAC) to high frequency AC (HFAC) direct power converter with PFC function for industrial induction heating (IH) applications. The proposed "simple three-phase system" consists of a single-phase UFAC to HFAC direct converter unit in each phase, three-phase low pass filter and three-phase IH load. This power converter can regulate the output power under a condition of the constant frequency zero voltage soft switching (ZVS) commutation principle on the basis of unique asymmetrical PWM control scheme. In this paper, high frequency IH output and utility AC current characteristics of three-phase direct converter supposed 5kW class IH system are demonstrated and evaluated from computer aided simulation with PSIM software. Furthermore, basic performance analysis of the single-phase converter unit is evaluated from an experimental point of view.

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  • 電動式射出成形機用 Add-on 式エネルギー回収システムの省エネ効果

    高橋 圭介, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   130 ( 5 )   713 - 714   2010年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:一般社団法人 電気学会  

    The regenerative energy from the motor drive systems used in the injection molding is consumed by resistors connected to the DC bus of the inverters. Recently the recovery systems of the regenerative energy with a bi-directional DC-DC converter and capacitors have been developed. In this paper a new control strategy of the EDLC based energy recovery system is proposed. The basic principle of the proposed control strategy and the power losses consumed in the energy recovery system are discussed in detail. The validity and practicability are confirmed by digital computer simulation.

    DOI: 10.1541/ieejias.130.713

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  • A New Half-Bridge Based Inverter with the Reduced-Capacity DC Capacitors for DC Micro-Grid

    Toshihiko Tanaka, Tsukasa Sekiya, Yusuke Baba, Masayuki Okamoto, Eiji Hiraki

    2010 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION   2564 - 2569   2010年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a new half-bridge based inverter for the DC micro-grid. The proposed topology consists of a three-leg inverter, which can be constructed by an intelligent power module (IPM). Using the IPM gives cost-effective inverters for the dc micro-grid. In the proposed half-bridge based topology with a three-leg inverter, two legs are used for two single-phase half-bridge inverters, where the neutral line is grounded. The third leg performs a power de-coupler balancing the mean value of two dc capacitor voltages. This power de-coupler exchanges the energies between two dc capacitors connected to two single-phase half-bridge inverters. Thus the capacity of the dc capacitors of the half-bridge inverters can be dramatically reduced as compared to those of the previously proposed half-bridge inverters for the dc micro-grid. The basic principle of the proposed half-bridge based inverter is discussed in detail, and then confirmed by digital computer simulation using PSIM software. Simulation results demonstrate that the capacity of the dc capacitors is reduced by one fortieth as compared to those of the previously proposed half-bridge based inverter used in the dc micro-grid.

    DOI: 10.1109/ECCE.2010.5617983

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  • A Charge Boost Type Multi Output Full Bride High Frequency Soft Switching Inverter for IH Cooking Appliance

    Shin Zenitani, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

    PROCEEDINGS OF 14TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (EPE-PEMC 2010)   2010年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, a multi output high frequency soft switching inverter topology is presented for home use IH cooking appliances. The proposed inverter system is comprised of simple power circuitry and unique control scheme. The detailed analysis shows that the proposed inverter has low harmonic distortion, low switching losses and wide output power range. A detailed PWM procedure is illustrated as well. Through simulation and experimental results, the proposed IH system is verified.

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  • 無効電流発生装置のオールディジタル制御化

    橋本覚, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • 誘導加熱用時分割制御高周波インバータ

    廣川貴之, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • DCマイクログリッド用単相3線式インバータの一構成法

    関谷司, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • 結合インダクタを有する降圧形DC-DCコンバータ

    渡辺潤, 平木 英治, 田中 俊彦

    2010年電子情報通信学会総合大会   2010   338 - 338   2010年

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

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  • 家庭用IHクッキングヒータ用ソフトスイッチングPFCコンバータにおけるDCM制御とCCM制御の実証的比較評価

    河口 祐樹, 平木 英治, 田中 俊彦, 定方 秀樹, 大森 英樹, 中岡 睦雄

    パワーエレクトロニクス学会誌   35 ( 35 )   114 - 121   2010年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    Harmonic currents in the utility side generated from the power electric equipment such as IH cooking heaters involve harmful influences to the other electrical applications. To suppress harmonic influences, adding the PFC converter to the input stage of IH cooking heater is one of the practical solutions. In this paper, two operation modes; DCM and CCM for the PFC converter are compared and tested from the view points of magnetic volume of the boost and filter inductors, source current harmonics suppression, power conversion efficiency and input power factor to clarify the suitable operation mode for home-use IH cooking appliance.

    DOI: 10.5416/jipe.35.114

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  • ハイブリッドフィルタを用いたソフトスタータ付き風力発電システム用高調波電流補償装置の始動法

    山田 洋明, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   35 ( 35 )   129 - 135   2010年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    This paper proposes a new starting method of the harmonic current compensator using the hybrid active filter for wind power generation systems. In the proposed method, an active filter of the hybrid power filter behaves a resistor and reactive power compensator to suppress the source currents oscillation and leading currents under the starting conditon. The basic principle of the proposed starting method is discussed, and then confirmed by digital computer simulation using PSCAD/EMTDC. Simulation results demonstrate that the proposed starting method can overcome the inrush and phase-leading currents, building up the dc capacitor voltage of the active filter.

    DOI: 10.5416/jipe.35.129

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  • 独立型太陽光発電システム用バッテリ充放電状態監視システム

    彼杵祐子, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • 省エネシステムとスイッチング回路技術(1)-家電分野-

    宇敷修一, 荻原弘之, 木船弘康, 庄司浩幸, 谷口勝則, 平木英治, 安井健治, 渡辺晴夫

    電気学会産業応用部門大会講演論文集   2010 ( 1 )   2010年

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  • DCマイクログリッドを中核とするユビキタスパワーの構築

    加藤慶一, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • DCマイクログリッド用単相3線式インバータの一構成法

    関谷司, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • 直流電圧平衡化回路を有する単相三線式配電用電流バランサ

    馬場雄介, 菅原和也, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • IHクッキングヒータ用チャージブースト型2出力フルブリッジインバータの特性評価

    銭谷紳, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • PSPICEによるGaNパワーMOSFETのスイッチング特性解析

    岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 加地徹, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 加地徹

    電気学会産業応用部門大会講演論文集   2010 ( 1 )   2010年

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  • 直流電圧平衡化回路を有するハーフブリッジインバータを用いた単相三線式配電用電流バランサ

    馬場雄介, 菅原和也, 岡本昌幸, 平木英治, 田中俊彦

    電気学会産業応用部門大会講演論文集   2010 ( 1 )   2010年

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  • 非接触給電用高周波電力変換回路

    河野真吾, 岡本昌幸, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • PSpiceを用いたGaN横型トランジスタのデバイスモデル作成

    豊田玄紀, 岡本昌幸, 平木英治, 田中俊彦, 橋詰保, 橋詰保, 加地徹, 加地徹

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010年

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  • 絶縁型双方向DC-DCコンバータのスイッチング素子の電流ピーク低減

    平生和雅, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • 三相商用AC-高周波ACダイレクトコンバータに用いる三相誘導加熱負荷の試作と動作解析

    高原貴昭, 平木英治, 田中俊彦, 橋詰保, 加地徹

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • ソフトスイッチングPFCコンバータへのSiC-SBD導入による高効率化の検証

    河口祐樹, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2010 ( 4 )   2010年

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  • A New Current Balancer in Single-Phase Three-Wire Secondary Distribution Feeders Using the Correlation Coefficients

    Toshihiko Tanaka, Hirokazu Fukui, Eiji Hiraki, Shuuji Watanabe, Shinji Fukuma

    ELECTRICAL ENGINEERING IN JAPAN   169 ( 1 )   50 - 58   2009年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SCRIPTA TECHNICA-JOHN WILEY & SONS  

    This paper proposes a new current balancer in single-phase three-wire secondary distribution systems using the correlation coefficients. The components of the load currents correlative to the primary side voltage waveform, which correspond to the active currents, are detected in each feeder, then the nonactive and unbalanced-active components are compensated on the source side. The balanced currents with unity power factor are obtained in each feeder. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. A prototype experimental system is constructed and tested. Experimental results demonstrate that the balanced source currents with unity power factor are obtained in spite of unbalanced load currents. (C) 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 169(1): 50-58, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20843

    DOI: 10.1002/eej.20843

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  • 変換器容量の低減を目的とした電気鉄道用パワーラインコンディショナの制御法

    石倉 規雄, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   129 ( 9 )   907 - 913   2009年9月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new control method for reducing the capacity of an active power quality compensator with a three-leg inverter used in electrified railways. In the proposed control method, the fundamental reactive and unbalanced-active components of the load currents are detected. The non-active and unbalanced-active components are compensated on the source side with the fundamental reactive power control. This reactive power control reduces the capacity of the three-leg inverter, which performs the active power quality compensator. The basic principle of the proposed control method is discussed in detail, and then confirmed by digital computer simulation using the PSIM software. A reduced-scale experimental model is constructed and tested. Experimental results demonstrate that the balanced sinusoidal source currents with the power factor of 0.9 are obtained, reducing the capacity of the three-leg inverter by 13% as compared to the already proposed control method.

    DOI: 10.1541/ieejias.129.907

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  • 双方向チョッパとPWM整流器を用いた大容量キャパシタシミュレータ

    西村 和則, 松本 脩平, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   129 ( 8 )   852 - 853   2009年8月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a large-capacity capacitor simulator consisting of a chemical capacitor and three-leg converter. One of three legs performs a bi-directional chopper. The others are used for a PWM rectifier. In the charging mode the most of the power stored in the chemical capacitor is injected to the utility through the PWM rectifier. In the discharging mode the power is supplied to the chemical capacitor side from the utility through the PWM rectifier. Thus the proposed simulator performs a large-capacity capacitor. The basic principle of the proposed simulator is discussed in detail. A prototype experimental model is constructed and tested. Experimental results demonstrate the validity and excellent practicability of the proposed simulator.

    DOI: 10.1541/ieejias.129.852

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  • 産業用高周波誘導加熱応用を目的としたPFC機能を有する三相AC-ACダイレクトコンバータの出力特性

    高原 貴昭, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2009 ( 109 )   7 - 12   2009年7月

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  • 電動式射出成形機の Add-on 式エネルギー回収システム

    高橋 圭介, 平木 英治, 田中 俊彦, 松田 哲男

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   109 ( 156 )   7 - 12   2009年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    小容量の電動式射出成形機に用いられるモータ駆動システムの多くは,回生エネルギーを抵抗で消費している。省エネルギー化の観点から,双方向DC-DCコンバータとエネルギー蓄積デバイスを組み合わせたエネルギー回収システムを急加減速を頻繁に行う電動式射出成形機に導入し,回生エネルギーを再利用する研究が活発に行われている。このシステムは,現在使用されている射出成形機の抵抗に替わりAdd-on,つまり付け加えるだけでよい非常に簡易なものである。しかしながら,現在エネルギー回収システムを付加したときのエネルギー利用効率を算出し,検討した例は著者らの知る限り余り見当たらない。そこで本論文では,計算機シミュレーションによりシステム全体のエネルギー損失を考慮したシステム効率を算出し,Add-on式エネルギー回収システムの有効性を検証する。

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  • A Constant DC Voltage Control Based Compensation Method of an Active Power Quality Compensator for Electrified Railways

    Toshihiko Tanaka, Norio Ishikura, Eiji Hiraki

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   4 ( 3 )   435 - 441   2009年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    This paper proposes a novel and simple control method for the active power quality compensators (APQCs) used in electrified railways. The proposed method uses only the constant dc capacitor voltage control block, which is commonly used in the APQCs. No detection blocks of the harmonic, reactive, and negative-sequence components are necessary. Thus we offer the simplest way to compensate the harmonic, reactive, and negative-sequence currents on the primary side of the Scott transformer in the traction substation. The basic principle of the proposed control method is discussed in detail, and then confirmed by digital computer simulation using PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that the balanced source currents with the unity power factor are obtained on the primary side with the proposed control method, which uses only the constant dc capacitor voltage control. (C) 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

    DOI: 10.1002/tee.20428

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  • BS-7-3 需要地系統システムと高品質電力供給(BS-7.ICT社会を支えるエネルギー・エレクトロニクス技術,シンポジウムセッション)

    大村 泰, 平木 英治, 田中 俊彦

    電子情報通信学会総合大会講演論文集   2009 ( 2 )   "S - 93"-"S-94"   2009年3月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

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  • FB-1ダイオード導通ZCS-PFC整流器をもつ新方式HB高周波負荷共振ZVS-PWMインバータ

    杉村 央生, 住吉 眞一郎, MUN Sang-Pil, 三島 智和, 平木 英治, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2009 ( 1 )   57 - 62   2009年1月

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  • 固定周波非対称PWM制御ソフトスイッチングハーブリッジDC-DCコンバータ

    三島 智和, 平木 英治, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2009 ( 1 )   49 - 55   2009年1月

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  • DC-DCコンバータのトランス動作磁束密度の推定-入力電圧急変モード-

    水島光, 田辺友章, 平木英治, 田中俊彦

    電気関係学会関西支部連合大会講演論文集(CD-ROM)   2009   2009年

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  • A Comparison of Operation Mode for Soft-Switching PFC Converter for Induction Heating Cooking Appliance

    Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Hideki Sadakata, Atsushi Fujita, Hideki Omori, Mutsuo Nakaoka

    IECON: 2009 35TH ANNUAL CONFERENCE OF IEEE INDUSTRIAL ELECTRONICS, VOLS 1-6   13 - 18   2009年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    Harmonic currents generated from the power electric equipment such as IH cooking heaters involve harmful influences to the other equipments connected to the utility grid. As for the 111 cooking appliances, adding the PFC converter to the input stage of IH cooking heater is one of the practical solutions to suppress harmonic current influences. In this paper, two operation modes; DCM and CCM for the PFC converter are compared and tested from the view points of magnetic volume and power quality to clarify the suitable operation mode for consumer IH cooking appliance.

    DOI: 10.1109/IECON.2009.5414802

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  • A Novel Soft Switching Three-Phase Utility Frequency AC to High Frequency AC Direct Power Converter with PFC Function for Industrial IH Appliance

    Takaaki Takahara, Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Kazunori Nishimura

    2009 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1 AND 2   1192 - +   2009年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper presents performance characteristics of a novel soft switching three phase utility frequency AC (UFAC) to high frequency AC (HFAC) direct converter with PFC function for industrial induction heating and melting applications The proposed "simple three phase system" consists of single phase UFAC to HFAC direct converter in each phase, three phase low pass filter and IH load. This power converter can regulate the output power under a condition of a constant frequency zero voltage soft switching (ZVS) commutation principle on the basis of unique asymmetrical PWM control scheme. In this paper, the input and output characteristics of proposed direct power converter on the basis of computer aided simulation are illustrated and discussed. Furthermore, Y-connected 3 phi working coils for IH load with the balanced coupling coefficient in each phase is designed and evaluated from an experimental point of view.

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  • DSP評価ボードを用いたPWM整流回路の試作

    徳永翔平, 田中俊彦, 平木英治

    電気関係学会関西支部連合大会講演論文集(CD-ROM)   2009   2009年

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  • DC-DCコンバータのトランス動作磁束密度の推定-電源電圧一定モード試験-

    田辺友章, 水島光, 平木英治, 田中俊彦

    電気関係学会関西支部連合大会講演論文集(CD-ROM)   2009   2009年

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  • A Push-Pull Converter Based Bidirectional DC-DC Interface for Energy Storage Systems

    Eiji Hiraki, Kazumasa Hirao, Toshihiko Tanaka, Tomokazu Mishima

    EPE: 2009 13TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOLS 1-9   5842 - 5851   2009年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In recent years, power electronic energy storage systems using Super capacitor bank have been widely studied and developed for the electronic vehicles. In this paper, a full-bridge/centertapped push-pull circuit with active clamp-based soft switching bidirectional DC-DC converter and its control method are presented and discussed. From the results of basic experimental demonstration, the proposed system is able to perform adequate charging and discharging operation between low-voltage high-current super capacitor side and high-voltage low-current side with drive train and main battery. In addition, RCDi snubber losses appeared in the basic circuit topology are drastically reduced by ZCS/ZVS operation with the assistance of newly added active clump circuit, as well as ZVS operation with lossless snubber capacitor in high-voltage primary side.

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  • 双方向チョッパと単相PWM整流器を用いた大容量キャパシタシミュレータ-電源電流制御法の検討-

    田中敦士, 平木英治, 田中俊彦, 西村和則

    電気学会産業応用部門大会講演論文集   2009 ( 1 )   2009年

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  • DCマイクログリッド用単相インバータの直流キャパシタ容量低減法

    関谷司, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • 直流電圧バランサを有する単相三線式配電用電流バランサ

    馬場雄介, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • 結合インダクタを有する降圧型DC-DCコンバータの動作解析

    渡辺潤, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • SHマイコンを用いた連系インバータ用単相PLL

    田中敦士, 加藤善也, 平木英治, 田中俊彦, 野田修司, 谷野章

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • 直流電圧バランサ付きハーフブリッジインバータを用いた単相3線式配電用電流バランサ

    菅原和也, 平木英治, 田中俊彦

    電気学会産業応用部門大会講演論文集   2009 ( 1 )   2009年

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  • IHクッキングヒータ用チャージブースト型2出力フルブリッジインバータ

    銭谷紳, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • 双方向チョッパと単相PWM整流器を用いたEDLCシミュレータ

    田中敦士, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • プッシュプルコンバータを用いたエネルギーストレージインターフェイス用双方向DC-DCコンバータ

    平生和雅, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   60th   2009年

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  • 変換器容量低減を目的とした電気鉄道用パワーラインコンディショナの制御法-無効電流と変換器容量の検討-

    石倉規雄, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • 2台のハーフブリッジを用いた電気鉄道用パワーラインコンディショナの一構成法

    石橋圭介, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • 家庭用IH調理器への応用を目的としたソフトスイッチングPFCコンバータにおける制御方式の比較

    河口祐樹, 平木英治, 田中俊彦, 定方秀樹, 藤田篤志, 大森英樹, 中岡睦雄

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • PFC機能を持つ高周波誘導加熱用三相AC-ACダイレクトコンバータの動作特性

    高原貴昭, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • 電動機エネルギー回収システムの充放電効率評価

    高橋圭介, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2009 ( 4 )   2009年

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  • ハイブリッドフィルタを用いたソフトスタータ付き風力発電システムの高調波電流補償装置 : 始動法の検討

    山田 洋明, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2008 ( 92 )   113 - 118   2008年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,先に提案したハイブリッドフィルタを用いたソフトスタータ付き風力発電システムの高調波電流補償装置を始動する際に問題となるLCパッシブフィルタ系統投入時の電流振動および進相電流抑制法を提案する。アクティブフィルタを電流に対して抵抗として動作させることにより,系統投入直後の電流振動を抑制する。進相電流は,パッシブフィルタのキャパシタ電圧を打ち消すようにアクティブフィルタから電圧を出力することで抑制する。PSCAD/EMTDCを用いた計算機シミュレーションにより提案方式の有効性を明らかにする。

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  • 昇降圧チョッパとPWM整流器を用いたEDLCシミュレータ

    松本 脩平, 平木 英治, 田中 俊彦, 西村 和則

    電気学会研究会資料. SPC, 半導体電力変換研究会   2008 ( 92 )   107 - 112   2008年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では電解コンデンサと3レグコンバータを用いたEDLCシミュレータを提案する。3レグコンバータの1レグは昇降圧チョッパとして用いて,電解コンデンサに流出入する電力を制御する。さらに,残った2レグはPWM整流器として用いる。EDLCシミュレータ充電モードでは,充電電力の大部分をPWM整流器により系統へ回生する。EDLCシミュレータ放電モードでは,PWM整流器により放電電力を系統から注入する。これにより,小容量の電解コンデンサを用いて大容量EDLCを模擬することができる。計算機シミュレーションと実験により提案したEDLCシミュレータの有効性を明らかにする。

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  • 変換器容量の低減を目的とした電気鉄道用パワーラインコンディショナの制御法

    石倉 規雄, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2008 ( 73 )   89 - 94   2008年6月

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  • Basic study of a phase-shifted soft switching high-frequency inverter with boost PFC converter for induction heating

    Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

    JOURNAL OF POWER ELECTRONICS   8 ( 2 )   192 - 199   2008年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER HEIDELBERG  

    This paper is mainly concerned with a high frequency soft-switching PWM inverter suitable for consumer induction heating systems. The proposed system is composed of a soft switching chopper based boost PFC converter stage with passive snubber and phase shifted PWM controlled full bridge ZVZCS high frequency inverter stage. Its fundamental operating performances are illustrated and evaluated in the experimental results. Its effectiveness is substantially proved on the basis of the experimental results from a practical point of view.

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  • 直流電圧一定制御を用いた電気鉄道用パワーラインコンディショナの制御法

    田中 俊彦, 石倉 規雄, 福井 博一, 平木 英治

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   128 ( 2 )   145 - 146   2008年2月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a novel control method for the active power quality compensator used in electrified railways. In the proposed method, only the constant dc voltage control is used to compensate the non-active and unbalanced active currents on the secondary side of the Scott transformer. Any schemes to detect the reactive and harmonic currents are not needed. Thus we can provide the simplest way to improve the power quality in electrified railways. The basic principle of the proposed control method is discussed. The validity and excellent practicability are confirmed by digital computer simulation using PSIM soft ware.

    DOI: 10.1541/ieejias.128.145

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  • 電源電圧と負荷電流の相関と相互相関に着目した単相三線式配電用電流バランサの制御法

    福井 博一, 平木 英治, 田中 俊彦, 福間 慎治

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   128 ( 1 )   34 - 40   2008年1月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new control method of the current balancer for single-phase three-wire secondary distribution systems using the correlation and cross-correlation coefficients. The components of the load currents correlative and cross-correlative to the primary side voltage waveform, which correspond to the active and reactive currents, are detected in each feeder, then the reactive and unbalanced-active components are compensated on the source side. The balanced currents with the variable power factor are obtained in each feeder. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. A proto-type experimental system is constructed and tested. Experimental results demonstrate that the balanced source currents with the power factor of 0.9 are obtained in spite of unbalanced load currents.

    DOI: 10.1541/ieejias.128.34

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  • ハーフブリッジインバータを用いた電気鉄道用パワーラインコンディショナ

    石橋圭介, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   59th   2008年

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  • 相関関数を用いた単相三線式配電用電流バランサの制御法

    福井 博一, 渡邉 修治, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 87 )   2194 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • Feasible Evaluation of a Full-Bridge Inverter for Induction Heating Cooking Appliances with Discontinuous Current Mode PFC Control

    Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka, Atsushi Fujita, Hideki Omori

    2008 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-10   2948 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A high frequency soft-switching PWM inverter with PFC function suitable for consumer IH cooking appliance is presented in this paper. The proposed system is composed of a soft switching chopper based boost PFC converter with passive snubber and phase shifted PWM controlled full bridge ZVZCS high frequency inverter. In order to meet the utility AC grid current harmonic regulation, a simple PFC control technique with discontinuous current mode is introduced and tested in addition to the fundamental operating performances of the proposed system. Effectiveness of proposed IH system is substantially proved on the basis of the experimental results from a practical point of view.

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  • A Single Active Edge-Resonant Snubber Cell-assisted ZCS Half-Bridge DC-DC Converter with Constant Frequency Asymmetrical PWM Scheme

    Tomokazu Mishima, Mutsuo Nakaoka, Eiji Hiraki

    2008 13TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, VOLS 1-5   119 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A newly-developed zero current soft-switching (ZCS)-PWM cell-assisted asymmetrical half-bridge (AHB) DC-DC converter topology with a high frequency (HF) link is presented in this paper. The soft-switching half-bridge DC-DC converter consists of a PWM-controlled single-ended half-bridge HF inverter and a center-tapped rectifier linked by a HF transformer. In order to attain the wide range of ZCS commutation in the primary-side HF inverter, the active edge resonant snubber cell composed of a switched capacitor and a lossless inductor is adopted in the half-bridge leg, providing ZCS commutation for a wide range of output power under constant switching frequency. The operation characteristics of the proposed DC-DC converter are described, and its feasibility data is demonstrated and evaluated with simulation and experimental results.

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  • GPS端末を用いた位置情報検知システムの試作

    高井里絵, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2008 ( 3 )   2008年

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  • ZCSセルを用いたソフトスイッチングPWM-SEPP高周波インバータとIHクッキングヒータへの応用

    三浦 祐太, 藤田 篤志, 大森 英樹, 平木 英治, 中岡 睦雄

    パワーエレクトロニクス学会誌   34   103 - 110   2008年

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    出版者・発行元:パワーエレクトロニクス学会  

    In this paper, multi-resonant zero current soft switching (ZCS) -PWM single ended push pull (SEPP) high frequency inverter is newly demonstrated for consumer induction heating (IH) appliances. The proposed inverter circuit has a novel ZCS cell consisting of high side main switch with lossless inductor snubber and active edge-resonant commutation cell (AERCC). The AERCC consisting of auxiliary diode, auxiliary resonant capacitor, auxiliary resonant inductor and auxiliary switch in parallel with the high side main switch arm. In the newly proposed inverter, heating power of IH cooking heater is controlled continuously during all heating power range under a principle of ZCS. The operating principle and performance analysis of the newly proposed inverter with asymmetrical pulse width modulation (PWM) control scheme are described using equivalent circuits in switching mode. This high frequency inverter can regulate heating power continuously from 0.25kW to 2.74kW in experiment with asymmetrical PWM control scheme. Finally, compared with conventional ZVS-PWM-SEPP high frequency inverter with asymmetrical PWM scheme, its power conversion efficiency of is high enough even in at low power range. The feasible effectiveness and practicability of the high frequency inverter treated here are substantially proved on the basis of experimental results for consumer IH cooking heater.

    DOI: 10.5416/jipe2003.34.0_103

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  • EPE-PEMC2008 (Poznan: Poland) 国際会議報告

    平木 英治

    パワーエレクトロニクス学会誌   34   226 - 226   2008年

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    出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe2003.34.0_226

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  • スタンドアローン駆動型太陽光発電システム用ソフトスイッチングコンバータ (第174回[パワーエレクトロニクス学会]定例研究会)

    中山 浩昭, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   34   143 - 150   2008年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    This paper deals with stand-alone photovoltaic (PV) generation systems low power DC applications, where a combined energy storage device consisting of an acid battery and Electric Double Layer Capacitor (EDLC) to avoid the deep discharge of the acid battery. Two types of the stand-alone PV generation systems, with a conventional converters and soft-switching converter, are constructed and tested. Experimental results demonstrate that the conventional type is very simple, but a large capacity EDLC is needed because of low efficiency. Efficiency of the PV generation system with soft-switching converters is high compared with that of the conventional type, and reduces the capacity of the EDLC. The PV generation system with soft-switching converters is useful for practical applications.

    DOI: 10.5416/jipe2003.34.0_143

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  • Stand-alone Photovoltaic Generation System with Combined Storage using lead Battery and EDLC

    Hiroaki Nakayama, Eiji Hiraki, Toshihiko Tanaka, Noriaki Koda, Nobuo Takahashi, Shuji Node

    2008 13TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, VOLS 1-5   1877 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This research is mainly concerned with a stand-alone photovoltaic (PV) generation system for low power DC applications placed where the commercial AC grid connection is not supported. In this paper, basic and improved circuit topologies and the control schemes of stand-alone photovoltaic generation system are proposed. To prevent battery from deep discharge, Electric Double Layer Capacitor (EDLC) is incorporated into the proposed systems as combined energy storage device in parallel with conventional lead battery. The fundamentals of operating performances and effectiveness of proposed stand-alone PV system are illustrated and evaluated on the basis of a practical point of view.

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  • DCマイクログリッド用単相3線式インバータの一構成法

    末岡翔太, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   59th   2008年

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  • ソフトスイッチング技術とその実用化最新動向

    平地克也, 岩本英雄, 夫馬弘雄, 加藤義人, 金春峰, 谷口勝則, 舩曳繁之, 松井景樹, 茂木進一, 入江寿一, 弦田幸憲, 中岡睦雄, 中村萬太郎, 二宮保, 平木英治, 渡辺修治, 石川裕記, 荻原弘之, 木船弘康, 米森秀登, 渡辺博巳, 石田宗秋, 笠展幸, 北條昌秀, 道平雅一, 岸本圭司, 小新博昭, 庄司浩幸, 安井健治, 宇敷修一, モイセエフ セルゲイ, 渡辺晴夫, 東聖, 岩倉哲史, 栗尾信広, 三浦友史, 山田健二, 木村友則, 篠原貞夫, 三島智和

    電気学会技術報告   ( 1119 )   2008年

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  • 直流電圧一定制御を用いた電気鉄道用パワーラインコンディショナの制御法-過渡応答特性の改善-

    石倉規雄, 平木英治, 田中俊彦

    電気学会産業応用部門大会講演論文集   2008 ( 1 )   2008年

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  • 家庭用誘導加熱(IH)調理器への応用を目的とした電流不連続モードPFC機能を有する2ステージ形高周波インバータの特性評価

    河口祐樹, 平木英治, 田中俊彦, 藤田篤志, 大森英樹, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2008 ( 1 )   2008年

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  • ハーフブリッジインバータを用いた単相三線式配電系統用電流バランサ-直流キャパシタ容量の検討-

    菅原和也, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   59th   2008年

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  • ハウス屋根面へ配置した太陽光発電システムの長期試験結果

    西村拓也, 加藤善也, 平木英治, 田中俊彦, 谷野章, 古江彩, 門脇正行, 野田修司, 石津文人

    電気学会全国大会講演論文集   2008 ( 4 )   2008年

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  • PFC機能を有する2ステージ形高周波インバータの家庭用IHクッキングヒータへの応用

    河口祐樹, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2008 ( 4 )   2008年

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  • 直流電圧一定制御を用いた電気鉄道用パワーラインコンデイショナの一制御法

    石倉規雄, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2008 ( 4 )   2008年

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  • EDLCを併用した複合電力貯蔵デバイスを持つ独立型太陽光発電システムに関する検討

    中山浩昭, 平木英治, 田中俊彦, 幸田憲明, 高橋信雄, 野田修司

    電気学会全国大会講演論文集   2008 ( 4 )   2008年

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  • EDLCを用いた電動機の回生エネルギー回収システムの充放電効率評価

    高橋圭介, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   59th   2008年

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  • A New Soft-Switching PWM High Frequency Half-Bridge Inverter Linked DC-DC Converter with Diode-Clamped Active Edge Resonant Snubbers

    Hisayuki Sugimura, Tetsuya Etoh, Toshimitsu Doi, Keiki Morimoto, Bishwajit Saha, Sang Pil Mun, Eiji Hiraki, Mutsuo Nakaoka

    2008 IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING, VOLS 1-5   2410 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In this paper, the novel circuit topology of half-bridge soft switching PWM DC-DC power converter with a high frequency planar transformer link was presented. The operating principle and switching pattern of the half-bridge soft switching PWM DC-DC power converter described for 40 kHz, 36V and 400A output were illustrated and discussed for low voltage and large current output applications such as telecommunication and automotive applications. The power loss analysis of the proposed soft switching DC-DC power converter was discussed and evaluated as compared with hard switching PWM DC-DC power converter with a high frequency link. The practical effectiveness of the proposed DC-DC power converter operation under soft switching PWM scheme was actually proved from a practical point of view and the high efficiency and power density of this converter could be achieved on the basis of experimental results for low voltage and large current power supplies.

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  • New Built-in Induction Heating Cooker Using High-Frequency ZVS-PWM Converter with Single Stage Circuit Topology

    Hisayuki Sugimura, Bishwajit Saha, Shinichiro Sumiyoshi, Hideki Omori, Sang-Pil Mun, Soon-Kurl Kwon, Eiji Hiraki, Mutsuo Nakaoka

    2008 IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING, VOLS 1-5   1010 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper presents a novel soft-switching PWM utility frequency AC to high frequency (HF) AC power conversion circuit incorporating boost-active clamp single stage inverter topology. This power converter is more suitable and acceptable for cost effective HF consumer induction heating (IH) applications. Its operating principle and the operation modes are presented using the switching mode equivalent circuits in addition to the operating voltage and current waveforms. The operating performances of this high frequency inverter using the latest IGBTs are illustrated, which includes HFAC power regulation ranges and actual efficiency characteristics based on zero voltage soft switching (ZVS) operation ranges and the power dissipation analysis as compared with those of the previously developed high frequency inverter. In addition, a dual mode selected control scheme of this high frequency inverter based on a constant frequency asymmetrical pulse width modulation (PWM) and pulse density modulation (PDM) control scheme is discussed in this paper in order to extend the soft switching operation ranges and to improve the power conversion efficiency at the low power settings. This power frequency converter practical effectiveness is substantially proved on the basis of experimental results from practical design example.

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  • Active Voltage Clamped Edge-Resonant Soft Switching PWM High Frequency Cyclo-Converter Using Bidirectional Switches

    Hisayuki Sugimura, Sang-Pil Mun, Soon-Kurl Kwon, Eiji Hiraki, Mutsuo Nakaoka

    2008 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-10   3917 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper presents a utility frequency AC (UFAC) to high frequency AC (HFAC) direct power frequency conversion pulse modulated conditioning circuit using bidirectional power switches. This power converter can efficiently operate under a principle of active zero voltage clamped soft commutation for consumer induction heating (IH) fixing roller for copy machine and printer. This HFAC direct power frequency converter defined as resonant high frequency PWM controlled power frequency converter using bidirectional switches is developed and evaluated in this paper for consumer IH fixing heat roller using industrial HFAC power supply. Its operating principle is described on the basis of switching mode equivalent circuits during switching one cycle period. It is evaluated on the basis of its simulation and experimental results on the performances of HFAC direct power frequency converter treated here including various duty factor control variable vs. HFAC power regulation characteristics as well as zero voltage soft switching ranges.

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  • A Novel Type Single-Stage ZVS-PWM High-Frequency Load Resonant Inverter with High Performance PFC Rectifier for Consumer IH Appliances

    Hisayuki Sugimura, Sang-Pil Mun, Soon-Kurl Kwon, Shinichiro Sumiyoshi, Hideki Omori, Eiji Hiraki, Mutsuo Nakaoka

    ICEMS 2008: PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1- 8   1215 - +   2008年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:WORLD PUBLISHING CORPORATION  

    This paper presents a high-efficiency-high power density one stage ZVS-PWM single-ended push-pull (SEPP) high frequency Inverter with new PFC functional scheme. This high-frequency resonant series load resonant inverter with lossless snubbing capacitors is composed of a passive PFC converter operating at one diode conducting bridge circuit and asymmetrical ZVS-PWM high frequency resonant direct inverter without the bulky electrolytic capacitor stage for boosted DC voltage smoothing. In addition, this one stage utility frequency AC (UFAC) to high frequency AC (HFAC) conversion circuit has only one diode conducting mode in the diode bridge rectifier with boost inductor. The operating principle of the one stage UFAC to HFAC series load resonant inverter with lossless capacitors is described by using the switching mode equivalent circuits in addition to the simulated operating voltage and current waveforms. The operating performances of this high-frequency ZVS-PWM resonant direct inverter with lossless snubbing capacitors are illustrated on the basis of simulation analysis which includes its UFAC-to-HFAC power regulation characteristics, soft switching operating range, UFAC side power factor characteristics and UFAC side line current harmonics characteristics by FFT analysis. In principle, the effectiveness of this UFAC-to-HFAC direct power frequency converter using IGBTs for consumer high-frequency IH appliances is evaluated and proved on the basis of simulation results.

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  • 直流電圧一定制御を用いた電気鉄道用パワーラインコンディショナの制御法

    石倉 規雄, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2007 ( 110 )   7 - 12   2007年11月

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  • A novel detection method of active and reactive currents in single-phase circuits using the correlation and cross-correlation coefficients and its applications

    Toshihiko Tanaka, Eiji Hiraki, Kengo Ueda, Kuniaki Sato, Shinji Fukuma

    IEEE TRANSACTIONS ON POWER DELIVERY   22 ( 4 )   2450 - 2456   2007年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    This paper proposes a novel method of detecting the active and reactive currents in single-phase circuits using the correlation and cross-correlation coefficients in the time domain. The active current is detected using the correlation coefficient between the source voltage and load current waveforms, and the reactive current is detected using the cross-correlation coefficient. The basic principle of the proposed detection method is discussed, and the proposed method is applied to a previously proposed single-phase shunt active filter for consumer electronic equipment. Simulation and experimental results demonstrate the excellent practicability of the proposed detection method.

    DOI: 10.1109/TPWRD.2007.905359

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  • 単相回路における簡易な有効・無効電流検出法

    大村 泰, 田中 俊彦, 平木 英治, 石倉 規雄, 山本 真義

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   107 ( 149 )   39 - 44   2007年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    著者らは先に,単相回路において相関と相互相関に着目した有効・無効電流検出法を提案し,その有効性を明ら有効・にした。本稿では,電力用アクティブフィルタで電源電庄を検出する際に広く用いられているPLL回路を用いた簡易な単相回路の有効・無効電流検出法を提案する。PLL回路出力のsinおよびcos成分と検出した負荷電流を乗算し有効・無効電流成分をLPFを用いて抽出する点に特長があり,それぞれ2個の乗算器と1つのLPFにより有効・無効電流を検出できる。計算機シミュレーションにより,提案した有効・無効電流検出法の有効性を確認する。

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  • スーパーキャパシタインターフェイス用双方向絶縁形ソフトスイッチングDC-DCコンバータの特性評価

    山本 剛司, 平木 英治, 田中 俊彦, 三島 智和

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   107 ( 149 )   21 - 26   2007年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年,人口増加に伴うエネルギー問題や環境保全といった地球問題から,電気自動車(EV)やハイブリッド自動車(HEV)の研究・開発が進められている。本論文では, EVやHEVの走行エネルギー回収用スーパーキャパシタ回生システムを想定したフルブリッジ-プッシュプル構成の双方向絶縁型ソフトスイッチングDC-DCコンバータを提案し,容量を低減した小型実験回路による基本的な特性評価を行った結果について報告している。

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  • PLL回路を用いた単相回路における簡易な有効・無効電流検出法

    大村 泰, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   127 ( 5 )   538 - 539   2007年5月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a novel detection method of active and reactive currents in single-phase circuits. This method uses only two multipliers and LPFs for detecting active and reactive currents with a PLL circuit. In the proposed method the fundamental active-reactive component in single-phase circuits can be detected by LPFs in the time domain like the instantaneous active-reactive power theory in three-phase circuits. The basic principle of the proposed detection method is discussed in detail, and then confirmed by digital computer simulation. Digital computer simulation results demonstrate that the proposed method can detect the active-reactive current in single-phase circuits in the time domain.

    DOI: 10.1541/ieejias.127.538

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  • 非対称アクティブ補助部分共振スナバZCS-PWM DC-DCコンバータ動作特性

    三島 智和, 平木 英治, 田中 俊彦, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   106 ( 494 )   7 - 12   2007年1月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    電子通信機器用給電装置や電気自動車電源システムなどを中心に,近年低圧大電流出力形DC-DCコンバーが注目されており,その高周波スイッチングに伴うスイッチング損失と電磁ノイズの低減を目的に種々のソフトスイッチング回路が提案されている。本稿では,非対称回路方式のアクティブ補助共振スナバによりゼロ電流スイッチングを行うハーフブリッジ・インバータと倍電流整流回路により構成される高周波トランスリンクZCS-PWM DC-DCコンバータを提案する。このDC-DCコンバータ回路トポロジーについて,シミュレーションおよび試作装置による実験動作特性の結果から,提案するアクティブ補助共振スナバ方式ゼロ電流スイッチングの有効性を示し,またトランスを含む共振回路パラメータの設計指針について述べる。

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  • スーパーキャパシタを用いた複合電力貯蔵デバイスを持つ太陽光発電システムの検討

    中山浩昭, 平木英治, 田中俊彦, 幸田憲明, 高橋信雄, 野田修司

    電気学会全国大会講演論文集   2007 ( 4 )   2007年

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  • A novel low-voltage/high-current ZCS-PWM DC-DC converter with asymmetrical auxiliary edge-resonant lossless snubber

    Tomokazu Mishima, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

    2007 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6   748 - 753   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE, ELECTRON DEVICES SOC & RELIABILITY GROUP  

    A novel zero current soft-switching PWM half-bridge DC-DC converter topology is proposed in this paper. The newly proposed converter consists of a PWM-controlled half-bridge inverter and a current doubler rectifier linked with a high-frequency transformer. In order to attain the wide range of soft switching operation in the high voltage/low current primary side inverter, asymmetrical lossless snubbers composed by an actively-switched capacitor and lossless inductors are employed in the half-bridge arm, providing Zero Current Switching (ZCS) that is less sensitive to the magnitude of the input current. The operation characteristics of the proposed DC-DC converter are described, and its feasibility is demonstrated with simulation and experimental results.

    DOI: 10.1109/PESC.2007.4342081

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  • ハイブリッドフィルタを用いた風力発電システム用高調波抑制装置-トレンド除去を用いたTHDの算出法-

    江南美穂, 山田洋明, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2007 ( 4 )   2007年

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  • BLT駆動用高周波ソフトスイッチングインバータと周波数追従制御

    吉川友, 平木英治, 田中俊彦, 中元正二, 大山超

    電気学会産業応用部門大会講演論文集   2007   2007年

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  • 電源電圧と負荷電流の相関に着目した単相三線式配電用電流バランサの制御法

    田中 俊彦, 福井 博一, 平木 英治, 渡邉 修治, 福間 慎治

    電気学会論文誌. D, 産業応用部門誌   127 ( 6 )   675 - 681   2007年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new current balancer in single-phase three-wire secondary distribution systems using the correlation coefficients. The components of the load currents correlative to the primary side voltage waveform, which correspond to the active currents, are detected in each feeder, then the non-active and unbalanced-active components are compensated on the source side. The balanced currents with unity power factor are obtained in each feeder. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. A proto-type experimental system is constructed and tested. Experimental results demonstrate that the balanced source currents with unity power factor are obtained in spite of unbalanced load currents.

    DOI: 10.1541/ieejias.127.675

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  • EPE 2007-Aalborg 国際会議報告

    平木 英治

    パワーエレクトロニクス学会誌   33   242 - 242   2007年

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    出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe2003.33.0_242

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  • ソフトスイッチング技術の動向:DC/DC変換

    弦田幸憲, 入江寿一, 中岡睦雄, 中村萬太郎, 二宮保, 安部征哉, 平木英治, 渡辺修治

    電気学会全国大会講演論文集   2007 ( 4 )   2007年

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  • アモルファスシリコン型太陽電池を用いた太陽光発電システム

    加藤善也, 平木英治, 田中俊彦, 谷野章, 古江彩, 門脇正行, 野田修司, 石津文人

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   58th   2007年

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  • 単相AC-ACダイレクトコンバータの回路パラメータ算定法

    田辺友章, 杉村央生, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   58th   2007年

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  • PLL回路を用いた単相回路における簡易な有効・無効電流検出法

    松本脩平, 大村泰, 山本真義, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2007 ( 4 )   2007年

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  • 燃料電池を用いた家庭用小型分散電源-改質器の応答による電力の余剰・不足電力の発生-

    松本脩平, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   58th   2007年

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  • 直流電圧一定制御を用いた電気鉄道用パワーラインコンディショナの制御法

    石倉規雄, 平木英治, 田中俊彦

    電気学会産業応用部門大会講演論文集   2007 ( 1 )   2007年

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  • アクティブ部分共振スナバZCS-PWM DC-DCコンバータの検討

    三島智和, 福間輝, 平木英治

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   58th   2007年

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  • 電気鉄道用パワーラインコンディショナの一制御法

    福井博一, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2007 ( 4 )   2007年

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  • 家庭での使用を目的としたEDLCシミュレータ

    矢野孝明, 平木英治, 田中俊彦

    電気学会産業応用部門大会講演論文集   2007 ( 1 )   2007年

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  • Operation analysis of a novel high frequency-link asymmetrical half-bridge ZCS-PWM DC-DC converter

    Tomokazu Mishima, Eiji Hiraki, Toshihiko Tanaka, Khairy Fathy, Mutsuo Nakaoka

    2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3   573 - +   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A novel zero current soft-swithing PWM half-bridge DC-DC converter topology is proposed in this paper. The newly proposed converter consists of a PWM-controlled half-bridge inverter and a current doubler rectifier linked with a high-frequency transformer. In order to attain the wide range of soft switching operation in the high voltage/low current primary side inverter, asymmetrical lossless snubbers composed by an actively-switched capacitor and lossless inductors are employed in the half-bridge arm, providing Zero Current Switching (ZCS) that is less sensitive to the magnitude of the input current. The operation characteristics of the proposed DC-DC converter are described, and its feasibility is demonstrated with simulation and preliminary experimental results.

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  • 家庭向け燃料電池発電システム用フライホイールシミュレータ

    西山祐史, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   58th   2007年

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  • 改良型補助共振セルZCS-PWMDC-DCコンバータの動作特性 (第170回[パワーエレクトロニクス学会]定例研究会)

    三島 智和, 平木 英治, 中岡 睦雄

    パワーエレクトロニクス学会誌   33   157 - 163   2007年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    A novel prototype of a soft-switching PWM DC-DC converter is presented in this paper. This converter consists of a half-bridge circuit assisted with an active edge resonant snubber for Zero Current Soft-switching (ZCS) commutation, and a current doubles rectifier linked with a high-frequency transformer. With the ZCS scheme and the circuit topology proposed here, the soft switching operation can be achieved for the wide range of output power under a constant switching frequency. The converter operation and characteristics are demonstrated with simulation results, and its feasibility is verified with experimental results using its 1.2kW-35kHz prototype.

    DOI: 10.5416/jipe2003.33.0_157

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  • スーパーキャパシタインターフェイス用双方向絶縁形ソフトスイッチングDC-DCコンバータの特性評価

    山本 剛司, 平木 英治, 田中 俊彦, 三島 智和

    電気学会研究会資料. SPC, 半導体電力変換研究会   2007 ( 74 )   390 - 395   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

    DOI: 10.1109/PESC.2007.4342018

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  • Direct high frequency soft switching inverter type AC-DC power converter with boost function for consumer magnetron drive

    Mutsuo Nakaoka, Bishwajit Saha, Hisayuki Sugimura, Sang Pi Mun, Eiji Hiraki, Hideki Omori

    IECON 2007: 33RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-3, CONFERENCE PROCEEDINGS   1336 - +   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    The oscillation voltage (Ebm) is an important parameter of the characteristic constant of a high power microwave generator. When Ebm could he made hi-h. it serves so as to improve the power conversion efficiency of a magnetron. Thus, the newly developed magnetron with 7% higher oscillation cut-off voltage Than the present conventional one is manufactured by Matsushita Electric Industrial Co.Ltd, In addition to this, the utility AC power line current reduced harmonic type direct inverter AC-DC power converter suitable and acceptable for driving this Magnetron is proposed in this paper. This direct high frequency inverter type soft switching PWM AC-DC converter has the voltage-boost function based on active clamp scheme with soft switching pulse modulation strategy topology. This paper describes a novel type active clamp AC-DC power converter circuit defined as direct high frequency inverter and the switching operation of this power converter is described and discussed on the basis of simulation and experimental results. The operating characteristics of this soft switching direct high frequency inverter type AC-DC power converter using IGBTs that incorporates the harmonic current improvement as well as power factor correction are evaluated and discussed front a practical point of view as compared with the conventional AC-DC power converter.

    DOI: 10.1109/IECON.2007.4459958

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  • A new phase shifted ZVS-PWM controlled full bridge series resonant high frequency inverter with auxiliary active quasi-resonant commutation circuit

    Hisayuki Sugimura, Soon-Kurl Kwon, Hiroyuki Ogiwara, Eiji Hiraki, Mutsuo Nakaoka

    2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3   1461 - +   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper presents a novel phase shifted ZVS-PWM high frequency load resonant inverter for electromagnetic induction fluid heating (IH) appliances. The proposed high frequency inverter can be achieved stable and efficient zero voltage soft commutation over a widely specified power regulation range from full power to low power by using an active auxiliary quasi resonant snubber. The steady state operating performance of this inverter is evaluated and discussed on the basis of simulation and experimental results for IH dual-packs heater (DPH) of compact fluid heating appliance. Finally, the effectiveness of IH application of the proposed high frequency inverter with auxiliary active quasi-resonant snubber is demonstrated from the practical point of view.

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  • A new current balancer for single-phase three-wire secondary distribution feeders using the correlation coefficients

    Toshihiko Tanaka, Hirokazu Fukui, Eiji Hiraki

    2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3   83 - +   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a new current balancer for single-phase three-wire distribution feeders using a three-leg voltage-source PWM inverter, which is equivalent to a three-phase voltage source inverter. Intelligent Power Modules (IPMs) can be used for the proposed current balancer. Thus we can provide a cost-effective and small-volume current balancer. A new control method for the proposed current balancer employing correlation coefficients between the source voltage and load currents is also proposed. The basic principle of the proposed current balancer with the proposed control method is discussed in detail, then confirmed by digital computer simulation with PSIM software. A prototype experimental model is constructed and tested. Experimental results demonstrate that balanced source currents with unity power factor are obtained in spite of unbalanced load currents.

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  • 単相回路における簡易な有効・無効電流検出法

    大村 泰, 田中 俊彦, 平木 英治, 石倉 規雄, 山本 真義

    電気学会研究会資料. SPC, 半導体電力変換研究会   2007 ( 74 )   2933 - 2938   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

    DOI: 10.1109/PESC.2007.4342487

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  • A new method of compensating harmonic currents for wind power generation systems with the soft starter using a hybrid active filter

    Hiroaki Yamada, Miho Enami, Eiji Hiraki, Toshihiko Tanaka

    2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3   382 - +   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    This paper proposes a new method of compensating harmonic currents for wind power generation systems with the soft starter using a hybrid active filter. The hybrid active filter consists of single-tuned LC and small-rated active filters. The single-tuned LC filter absorbs the harmonic current while behaving as a phase-leading capacitor for the fundamental component. The small-rated active filter improves the compensation characteristics of the passive filter under the soft start of the constant-speed wind turbine. The required rating of the active filter can be reduced because the active filter does not supply the fundamental reactive current. The basic principle of the proposed compensation method is discussed, and then confirmed by digital computer simulation using PSCAD/EMTDC. Simulation results demonstrate that the waveform of the source current becomes sinusoidal under the soft start. The required rating of the active filter is about 8.5% of the induction generator rating. A new calculation method of THD with the detrending algorithm is proposed for the transient state. The THD of the source current is about 7.3% using the hybrid active filter.

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  • Full bridge phase-shifted soft switching high-frequency inverter with boost PFC function for induction heating system

    Yuki Kawaguchi, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

    2007 EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOLS 1-10   1647 - 1654   2007年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE SERVICE CTR  

    This paper is mainly concerned with a high frequency soft-switching PWM inverter suitable for consumer induction heating system. Proposed system is composed of soft switching chopper based voltage boost PFC input stage and phase shifted PWM controlled full bridge ZCZVS high frequency inverter stage. Its fundamentals of operating performances are illustrated and evaluated on the experimental results. Its effectiveness is substantially proved on the basis of the experimental results from a practical point of view.

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  • Newly proposed hybrid resonant commutation bridge-leg link snubber-assisted three-phase ZVZCS-PWM soft-switching inverter

    Eiji Hiraki, Masanobu Yoshida, Yoshihiko Hirota, Mutsuo Nakaoka

    ELECTRICAL ENGINEERING IN JAPAN   157 ( 4 )   75 - 84   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    This paper presents the newly proposed hybrid resonant commutation bridge-leg link (HRCB) snubber circuit which can achieve zero voltage and zero current soft-switching commutation for single-phase and three-phase voltage source-type inverter, along with its unique features and operation principle. The circuit parameter design approach for the HRCB snubber circuit and the determination estimating scheme of the gate pulse timing processing which is more suitable and acceptable for single-phase and space voltage vector modulated three-phase voltage source inverter using the HRCB snubber circuit are described in this paper. In particular, the three-phase voltage source soft-switching inverter associated with the proposed HRCB circuits are evaluated and discussed from simulation and experimental viewpoints. The practical effectiveness of the HRCB snubber-assisted three-phase voltage source soft-switching inverter using IGBT power modules which is based on the instantaneous space voltage vector modulation is clarified on the output voltage waveform, actual efficiency of electromagnetic noise in comparison with three-phase voltage source-type conventional hard-switching inverter. (C) 2006 Wiley Periodicals, Inc.

    DOI: 10.1002/eej.20111

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  • ハイブリッドフィルタを用いたソフトスタータ付き風力発電システムの高調波電流補償法

    山田 洋明, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 87 )   51 - 56   2006年6月

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  • ハイブリッドフィルタを用いた風力発電システムのソフトスタート時における高調波電流補償法

    山田 洋明, 平木 英治, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   126 ( 6 )   818 - 819   2006年6月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new method of compensating harmonic currents under the soft start in wind power generation systems using the hybrid filter, which consists of a passive and small-rated active filters. For the fundamental component, the passive filter behaves a phase-leading capacitor. The small-rated active filter compensates the harmonic currents under the soft start. The basic principle of the proposed compensator is discussed, and then confirmed by digital computer simulation using PSCAD/EMTDC. Simulation results demonstrate that the source currents become sinusoidal waveforms under the soft start.

    DOI: 10.1541/ieejias.126.818

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  • 次世代自動車用スーパーキャパシタインターフェース双方向DC-DCコンバータ

    三島 智和, 平木 英治, 山本 剛司, 田中 俊彦

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   126 ( 4 )   529 - 530   2006年4月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    A bidirectional DC-DC converter for supercapacitor-based energy storage systems in advanced electric vehicles is proposed in this letter. This converter consists of a half-bridge and current-fed push-pull circuit linked with a high frequency transformer, which is well applicable to the low voltage/high current charge and discharge of the supercapacitor. The experimental results of the prototype system prove the effective properties of the proposed topology in terms of a low device-conduction loss and a low switching surge.

    DOI: 10.1541/ieejias.126.529

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  • 新方式電圧給電フルブリッジ形ソフトスイッチングPWM高周波インバータを用いたアーク溶接機用高出力DC-DC変換器

    森本 慶樹, 土井 敏光, 真鍋 陽彦, AHMED Tarek, 平木 英治, 李 鉉雨, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   126 ( 3 )   237 - 247   2006年3月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a new circuit topology of full-bridge soft-switching PWM inverter linked DC-DC power converter composed of conventional full-bridge high frequency PWM inverter with high frequency transformer and an active quasi-resonant snubber consisting of an additional power switching device in series with DC busline and a lossless capacitor in parallel with DC busline. Under this proposed high frequency soft-switching PWM inverter linked DC-DC converter, four power switches in the full-bridge arms and DC busline series switch can achieve ZVS at turn-off commutation. By developing the advanced soft-switching PWM high frequency inverter type DC-DC converter, although the conduction power loss of DC busline series power switch increases a little, the total turn-off switching loss of full-bridge high frequency inverter power modules can be sufficiently lowered more and more in the higher frequency range of 60kHz. As a result, when the switching frequency of high frequency inverter power stage using IGBT power modules is designed so as to be more than about 10kHz, the more the switching frequency of inverter increases, the more this high frequency soft-switching DC-DC converter has remarkable advantage as for the power conversion efficiency as compared with the conventional hard-switching PWM inverter DC-DC converter. Its practical effectiveness of high power density and high performance is actually proved for TIG arc welding equipment in industry.

    DOI: 10.1541/ieejias.126.237

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  • PFC機能を持つ三相AC-ACダイレクトインバータの特性評価

    中尾 昌弘, 平木 英治, 田中 俊彦, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   105 ( 601 )   127 - 132   2006年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年,クリーン・急速加熱・高効率・安全性・温度制御容易といった優れた特徴を活かした電磁誘導加熱(IH)応用製品が家電分野や工業分野における電気エネルギー有効変換高度化利用分野で脚光を浴びている。本論文は高周波電磁誘導加熱用電力周波数変換器として低コスト・高効率・高入力力率・高パワー密度化が期待される商用周波AC-高周波ACソフトスイッチングPWMダイレクトコンバータを提案し,その動作原理と商用ACサイド高調波電流特性について検討している。

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  • 高調波抑制機能を有する誘導加熱用1ステージAC-ACコンバータ

    谷松 弘章, 平木 英治, 田中 俊彦, 中岡 睦雄, 安井 健治, 弘田 泉生, 岩井 利明, 大森 英樹

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 36 )   47 - 52   2006年1月

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  • スーパーキャパシタインターフェース用ハーフブリッジ方式双方向DC-DCコンバータの検討

    三島 智和, 平木 英治, 山本 剛司, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 36 )   25 - 28   2006年1月

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  • 電気自動車用スーパーキャパシタインターフェイス双方向DC-DCコンバータに関する検討

    石上 宜範, 平木 英治, 田中 俊彦, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 36 )   29 - 34   2006年1月

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  • ソフトスイッチング技術を用いた高昇圧率チョッパを入力段にもつ2ステージ3相電圧形インバータの特性評価

    白石 和洋, 平木 英治, 田中 俊彦, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2006 ( 36 )   35 - 40   2006年1月

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  • 相関関数を用いた単相三線式配電用電流バランサの制御法

    田中 俊彦, 福井 博一, 平木 英治, 渡邉 修治, 福間 慎治

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   126 ( 1 )   84 - 85   2006年1月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper proposes a new control method of the current balancer in single-phase three-wire secondary distribution systems using the correlation function. The components of the load currents correlative to the primary side voltage waveform, which correspond to the active currents, are detected in each feeder, then the non-active and unbalanced-active components are compensated on the source side. The balanced currents with unity power factor are obtained in each feeder. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. Digital computer simulation results demonstrate that the balanced source currents with unity power factor are obtained in spite of unbalanced load currents.

    DOI: 10.1541/ieejias.126.84

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  • 単相三線式配電用電流バランサの実験による検討

    福井博一, 渡辺修治, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   57th   2006年

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  • Bidirectional DC-DC converter with full-bridge/push-pull circuit for automobile electric power systems

    Koji Yamamoto, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka, Tomokazu Mishima

    2006 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-7   2340 - +   2006年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In recent years, energy storage systems assisted by super capacitor have been widely researched and developed to progress power systems for the electronic vehicles. In this paper, a full-bridge/push-pull circuit-based bidirectional DC-DC converter and its control methods are proposed. From the results of detailed experimental demonstration, the proposed system is able to perform adequate charge and discharge operation between low-voltage high-current super capacitor side and high-voltage low-current side with drive train and main battery. Furthermore, conduction losses and voltage/current surge are drastically reduced by ZVS operation with loss-less snubber capacitor in high voltage side as well as the synchronous rectification in low-voltage high-current super capacitor side.

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  • A new soft-switched bidirectional DC-DC converter topology for automotive high voltage DC bus architectures

    Tomokazu Mishima, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

    2006 IEEE VEHICLE POWER AND PROPULSION CONFERENCE   386 - +   2006年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A new type of soft switched bidirectional DC-DC converter for automotive electric power systems is presented in this paper. This converter consists of dual half-bridge circuits linked with a high frequency transformer, which is applicable as an interface between a high-voltage DC bus line and a low-voltage power source such as Supercapacitor. In order to reduce the switching losses and expand the soft switching range, a newly developed two-lossless switched capacitor snubber-assisted Zero Current Switching (ZCS) are applied to the primary side circuit. By using this ZCS scheme, the soft switching operation can be achieved for the wide range of output power. The converter operation is demonstrated with simulation results, and its feasibility is verified by experimental using its 1.0kW-25kHz prototype system.

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  • フルブリッジ-プッシュプル構成の電気自動車用双方向DC-DCコンバータに関する検討

    山本剛司, 平木英治, 三島智和, 田中俊彦

    電気学会全国大会講演論文集   2006 ( 4 )   2006年

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  • アクティブ補助共振ロスレススナバ方式ZCS双方向DC-DCコンバータの検討

    三島智和, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2006 ( 4 )   2006年

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  • フライホイール発電機への応用を目的としたアクティブフィルタの一制御法

    楊井省一, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2006 ( 4 )   2006年

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  • ハイブリッドフィルタを用いたソフトスタート付き風力発電システムの高調波電流補償法-アクティブフィルタの直流キャパシタ容量の検討-

    山田洋明, 平木英治, 田中俊彦

    電気学会全国大会講演論文集   2006 ( 4 )   2006年

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  • An isolated bidirectional DC-DC converter based super-capacitor interface for automobile electric power systems

    Eiji Hiraki, Koji Yamamoto, Toshihiko Tanaka, Tomokazu Mishima, Mutsuo Nakaoka

    2006 12TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, VOLS 1-4   1025 - +   2006年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    In recent years, power electronic energy storage systems using super capacitor bank have been widely studied and developed for the electronic vehicles. In this paper, a full-bridge/centertapped push-pull circuit-based bidirectional DC-DC converter and its control method are proposed and discussed. From the results of detailed experimental demonstration, the proposed system is able to perform adequate charging and discharging operation between low-voltage high-current super capacitor side and high-voltage low-current side with drive train and main battery. Furthermore, conduction losses and voltage/current urge are drastically reduced by ZVS operation with lossless snubber capacitor in high-voltage side as well as the synchronous rectification in low-voltage high-current super capacitor side.

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  • A ZCS lossless snubber cells-applied half-bridge bidirectional DC-DC converter for automotive electric power systems

    Tomokazu Mishima, Eiji Hiraki, Toshihiko Tanaka

    2006 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-7   917 - 922   2006年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    A new type of bidirectional DC-DC converter for electric power systems in advanced electric vehicles is proposed in this paper. This converter consists of half-bridge circuits with a high frequency transformer, which is well applicable as an interface between a high-voltage DC bus line and a low-voltage power source. In order to reduce the switching loss, newly developed ZCS loss-less snubber cells are applied to the primary side power stage. By the proposed topology, a soft switching operation can be achieved under the wide range of load current. The converter operation is demonstrated with simulation results, and the feasibility of the new topology is discussed as well as the converter design consideration.

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  • 電力の地産地消に関する研究

    矢野孝明, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   57th   2006年

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  • PLL回路を用いた単相回路における簡易な有効・無効電流検出法

    松本 脩平, 田中 俊彦, 平木 英治, 大村 泰, 山本 真義

    パワーエレクトロニクス学会誌   32   192 - 192   2006年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    DOI: 10.5416/jipe2003.32.0_192

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  • 対称形ロスレススイッチトキャパシタスナバ方式ZCS双方向DC-DCコンバータ動作評価 (第164回[パワーエレクトロニクス学会]定例研究会)

    三島 智和, 平木 英治, 田中 俊彦

    パワーエレクトロニクス学会誌   32   113 - 121   2006年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス学会  

    A new type of soft switched bidirectional DC-DC converter for advanced automotive electric power systems is presented in this paper. This converter consists of dual half-bridge circuits linked with a high frequency transformer, which is applicable as an interface between a high-voltage DC bus line and a low-voltage power source such as Supercapacitor. In order to reduce the switching losses and expand the soft switching range, a newly developed two-lossless switched capacitor snubber-assisted Zero Current Switching (ZCS) are applied to the primary side circuit. By using this ZCS scheme, the soft switching operation can be achieved for the wide range of output power. The converter operation is demonstrated with simulation results, and its feasibility is verified with experimental results using its 1.0kW 25kHz prototype system.

    DOI: 10.5416/jipe2003.32.0_113

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  • フルブリッジ-プッシュプル構成の電気自動車用双方向DC-DCコンバータに関する検討

    山本剛司, 平木英治, 三島智和, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   57th   2006年

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  • ハイブリッドフィルタを用いた風力発電システム用高調波抑制装置-弱小系統におけるリプルフィルタの検討-

    江南美穂, 山田洋明, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   57th   2006年

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  • アクティブ補助共振スナバを用いた誘導加熱用ZCS-PWM高周波インバータ

    三浦祐太, 平木英治, 田中俊彦

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   57th   2006年

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  • ロスレススイッチト・キャパシタスナバ方式ZCSハーフブリッジDC-DCコンバータの検討

    三島智和, FATHY Khairy, 平木英治, 中岡睦雄

    電気関係学会関西支部連合大会講演論文集(CD-ROM)   2006   2006年

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  • 相関と相互相関に着目した単相アクティブフィルタの制御法 : 高調波電圧および瞬時電圧低下発生時における検討

    上田 健吾, 渡辺 修治, 福間 慎治, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2005 ( 99 )   67 - 72   2005年11月

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  • スーパーキャパシタエネルギー貯蔵システム対応双方向形DC-DCコンバータ

    三島 智和, 平木 英治

    電子情報通信学会技術研究報告   105 ( 269 )   19 - 24   2005年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本研究論文では, 電気二重層キャパシタ(スーパーキャパシタ)を適用したエネルギー貯蔵システムに適する双方向形DC-DCコンバータを提案する.スーパーキャパシタは低電圧大電流充放電動作を行うため, 提案するコンバータは高い昇降圧比が得られる高周波トランス絶縁方式とし, ハーフブリッジ回路と電流形プッシュ・プル回路により構成される.また, 半導体デバイスの高速スイッチングに伴うスイッチングロスとサージ電圧を抑止するため, ハーフブリッジ回路をゼロ電圧スイッチングで駆動し, さらに, デバイス導通損失を低減するためプッシュ・プル回路は同期整流動作を行う.提案回路方式により, スーパーキャパシタエネルギー利用率を高めるとともに, 電力変換損失の少ない電力双方向制御が実現できる.

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  • 高周波AC-ACダイレクトコンバータとその応用

    中尾 昌弘, 平木 英治, 田中 俊彦, 中岡 睦雄, 弘田 泉生, 大森 英樹

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   105 ( 197 )   55 - 60   2005年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年, IHクッキングヒータ, IH炊飯ジャー, IHスチーマー, IHアイロンなどクリーン・急速加熱・高効率・安全性・温度制御容易といった優れた特徴を活かした電磁誘導加熱(IH)応用プロダクトが全電化住宅システムにおける電気エネルギー有効変換高度化利用分野で脚光を浴びている。本論文は高周波電磁誘導加熱用電力周波数変換器として低コスト・高効率・高入力力率・高パワー密度化が期待される商用周波AC-高周波ACソフトスイッチングPWMダイレクトコンバータ(高周波ソフトスイッチングサイクロコンバータ)を提案し, その動作原理と商用ACサイド高調波電流特性などについて検討している。

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  • PWM/PDM複合制御型ソフトスイッチング高周波インバータの特性評価

    三浦 祐太, 平木 英治, 田中 俊彦, 安井 健治, 岩井 利明, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   105 ( 197 )   49 - 54   2005年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では, IH調理加工応用のためのアクティブ補助共振ロスレススナバを用いた定周波PWM制御機能ゼロ電流ソフトスイッチング高周波複合共振型インバータ回路とその制御方式を提案している。本インバータ回路は従来の直列負荷共振型高周波ZCS-SEPPインバータ回路にアクティブ補助共振ロスレススナバを追加したことにより非対称PWM方式で電力を調整することができる回路トポロジーである。また本インバータの回路方式はZCS-SEPP構成であることから非対称PWM方式だけでなく、PDM方式を導入することも可能である。このPWM/PDM複合制御の導入により全電力領域でのソフトスイッチング動作を実現できる。IH応用PWM/PDM複合制御型ソフトスイッチング高周波インバータの有用性を明らかにするために試作実験を行い、性能評価と検討した結果について述べている。

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  • 相関関数を用いた単相三線式配電用電流バランサの制御法

    福井 博一, 渡辺 修治, 平木 英治, 田中 俊彦

    電気学会研究会資料. SPC, 半導体電力変換研究会   2005 ( 58 )   13 - 18   2005年6月

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  • 誘電体バリア放電ランプ駆動用E級一石電流形高周波ソフトスイッチングインバータ

    松田 樹也, 平木 英治, Ahmed Nabil A., LEE Hyun Woo, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   104 ( 651 )   21 - 25   2005年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年、人体への影響や環境保全の観点から、水銀を使用しない環境リサイクルの意識が一段高まってきている。そこで本論文では、水銀の代わりに希ガスを使用した誘電体バリア放電(無声放電)ランプの駆動および調光を目的としてパルス密度変調(PDM)制御方式を用いたE級一石電流形高周波ソフトスイッチングインバータについて述べている。誘電体バリア放電ランプの非線形容量性等価回路モデルと回路パラメータの測定法を示している。次に一石電流形高周波ソフトスイッチングインバータの回路構成、動作原理を述べている。さらにシミュレーションにより一石共振形高周波インバータの回路動作特性を示し、一石電流形高周波ソフトスイッチングインバータとロイヤー形高周波インバータを輝度特性をもとに比較検討し、表題の高周波インバータの有効性を明らかにしている。

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  • ソフトスイッチングPWM方式商用AC-高周波ACダイレクトコンバータ

    中尾 昌弘, 杉村 央生, 平木 英治, AHMED Nabil A., LEE Hyun Woo, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   104 ( 651 )   27 - 32   2005年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年, IHクッキングヒータ, IH炊飯ジャー, IHスチーマー, IHアイロンなどクリーン・急速加熱・高効率・安全性・温度制御容易といった優れた特徴を活かした電磁誘導加熱(IH)応用プロダクトが全電化住宅システムにおける電気エネルギー有効変換高度化利用分野で脚光を浴びている。本論文は高周波電磁誘導加熱用電力周波数変換器として低コスト・高効率・高入力力率・高パワー密度化が期待される商用周波AC-高周波ACソフトスイッチングPWMダイレクトコンバータ(高周波ソフトスイッチングサイクロコンバータ)を提案し, その動作原理と商用ACサイド高周波電流特性などについて述べている。

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  • 新方式アクティブ共振スナバ高周波リンクソフトスイッチングPWM DC-DCコンバータ

    石上 宜範, 平木 英治, Ahmed Nabil A., LEE Hyun Woo, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   104 ( 651 )   7 - 11   2005年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年、数kWレベルの半導体電力変換装置においては、アクティブ補助共振スイッチを用いることによりパワー半導体スイッチのソフトスイッチングを実現する回路トポロジーが開発されている。一段とスイッチング周波数の高周波化が可能となり、高周波トランス絶縁形DC-DCコンバータの高効率化・小型軽量化・高性能化が進んでいる。本論文では、アーク溶接機(TIG/MIG)用電源として適合した低電圧・大電流出力対応のフルブリッジ高周波絶縁形ソフトスイッチングPWM DC-DCコンバータについて述べている。アクティブ補助スイッチ、ロスレススナバキャパシタ、共振インダクタから成る補助共振スナバを追加することで、高周波インバータ部スイッチと補助共振スナバスイッチのどちらもソフトスイッチング実現可能な回路トポロジーを提案し、提案回路の構成と特徴、回路動作を述べ、その有効性を明らにしている。

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  • アクティブ補助共振スナバを用いた高周波 Phase Shifted PWM DC-DC Converter

    西田 知正, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   104 ( 650 )   31 - 35   2005年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    シフト制御はフルブリッジインバータ回路をソフトスイッチング動作させられる。しかし全パワー領域においてソフトスイッチング動作をさせられるわけではない。本論文ではできるだけソフトスイッチング動作をするように補助共振スナバ回路を取り付けたアクティブ補助共振スナバを用いたPhase Shift PWM DC-DC Converterを提案し、補助共振スナバ回路動作、実測効率等をまとめている。

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  • 正弦波絶対値時分割変調ソフトスイッチングPWM昇圧チョッパ制御単相正弦波インバータ

    小倉 弘毅, 白石 和洋, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   104 ( 650 )   7 - 13   2005年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では, 独立型小容量太陽光発電システム用パワーコンディショナを想定した電解キャパシタレス新方式高効率単相正弦波PWMインバータを提案し, その回路動作と制御法, 並びに特徴について述べている.またパワー半導体デバイスのスイッチング損失の低減を図るため, パッシブ補助部分共振スナバを付加したソフトスイッチング昇圧チョッパを提案し, その動作について述べている.本試作実験器において提案回路のスイッチング波形, 各部電圧・電流の実測波形を示し, 実証的な評価と検証を行っている.さらに従来型正弦波インバータと本提案正弦波インバータの実測変換効率を相互比較し, 変換効率や回路構成の観点から, 本提案正弦波インバータの有効性と実用性を明らかにしている.

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  • 新方式AC400V系入力対応電圧給電フルブリッジ形ソフトスイッチングPWM高周波インバータを用いた高出力DC-DC変換器

    森本 慶樹, 土井 敏光, 真鍋 陽彦, 平木 英治, LEE Hyun Woo, 中岡 睦雄, AHMED Tarek

    電気学会研究会資料. SPC, 半導体電力変換研究会   2005 ( 9 )   1 - 7   2005年1月

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  • 直流平滑フィルタDCリンクをもたない高周波誘導加熱用ソフトスイッチングPWM電力周波数変換器

    杉村 央生, 村岡 秀和, 平木 英治, 弘田 泉生, 安井 健治, 大森 英樹, Lee Hyun-Woo, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌   125 ( 11 )   988 - 999   2005年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In this paper, high frequency power converter without DC smoothing electrolytic capacitor filter link which convert the 100V/200Vrms and 60Hz single phase utility frequency AC power into a high frequency AC. This proposed high frequency AC power converter without electrolytic capacitor filter can operate under a principle of soft switching PWM based on a lossless capacitor snubber is proposed and demonstrated for consumer high frequency induction heating (IH). In particular, this high frequency power converter capable of producing a high frequency AC more than 20kHz is developed for consumer IH applications as hot water producer and steamer based on the specially designed spiral type IH-Dual Packs Heater (DPH), which includes the dual mode pulse modulation control scheme based on soft switching PWM for high output power setting and commercial frequency AC zero voltage soft switching pulse density modulation (PDM) for low output power settings. This developed high frequency power frequency converter using trench gate IGBTs is clarified on the basis of experimental and simulation results for its circuit operation of the utility frequency AC to high frequency AC frequency PWM power converter without the electrolytic capacitor bank DC filter link for the IH hot water and IH steamer. These IH appliances are based upon an innovative electromagnetic IH-DPH for fluid heating as heat exchanger in consumer pipeline. Finally, its power regulation characteristics, power conversion efficiency and harmonic current components characteristics including power factor in utility AC grid side are evaluated and discussed from an experimental point of view. The practical effectiveness of this utility frequency AC to high frequency AC soft switching high power frequency converter defined conveniently as high frequency soft switching cyclo-inverter is proved as one of the important products effective for next generation IH application all electricity power utilizations.

    DOI: 10.1541/ieejias.125.988

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  • 最新の小容量高周波スイッチング半導体電力変換器におけるパワーエレクトロニクス

    平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌   125 ( 11 )   955 - 963   2005年

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In resent years, the soft switching commutated power converter technologies have attracted special interest in order to minimize semiconductor switching power losses and reduce conductive switching noise. This special issue deals with some schematic descriptions on application-specific quasi-resonant power converter circuits, which make use of soft switching commutation schemes.

    DOI: 10.1541/ieejias.125.955

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  • 希ガス蛍光ランプ調光用高周波インバータの性能評価

    藤田堅太郎, 松田樹也, 平木英治

    電気学会全国大会講演論文集   2005 ( 4 )   2005年

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  • 簡易制御型アクティブ共振DCリンクスナバを持つ三相電圧形ソフトスイッチングインバータ

    藤井勇馬, 白石和洋, 中村万太郎, 平木英治

    電気学会全国大会講演論文集   2005 ( 4 )   2005年

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  • 補助共振スイッチ付高周波トランスリンクソフトスイッチングPWM DC-DCコンバータの特性評価

    衛藤哲弥, 石上宜範, 平木英治, 中岡睦雄, 土井敏光, 真鍋陽彦, 森本慶樹

    電気学会全国大会講演論文集   2005 ( 4 )   2005年

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  • 位相シフトPWM制御高周波インバータを用いたIHポーラス金属デュアルパックスヒータ方式給湯器の開発

    藤田堅太郎, 杉村央生, 安井健治, 弘田泉生, 岩井利明, 大森英樹, 村岡秀和, 平木英治, 中岡睦雄

    エレクトロヒート   ( 140 )   2005年

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  • IHクッキングヒータ用PWM/PDM複合制御型ソフトスイッチング高周波インバータ

    三浦祐太, 谷松弘章, 平木英治

    電気学会全国大会講演論文集   2005 ( 4 )   2005年

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  • アクティブ補助共振スナバ方式ソフトスイッチングPWMインバータの太陽光発電システムへの応用

    白石和洋, 小倉弘毅, 中村万太郎, 平木英治

    電気学会全国大会講演論文集   2005 ( 4 )   2005年

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  • 三相電圧形圧正弦波ソトスイッチングインバータの瞬時空間電圧ベクトル変調法による出力電圧THDの改善

    平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. B, 通信 = The transactions of the Institute of Electronics, Information and Communication Engineers. B   87 ( 5 )   736 - 740   2004年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文は,アクティブ補助部分共振転流ブリッジレッグスナバ回路を用いた三相電圧形正弦波PWMソフトスイッチングインバータの変調法として瞬時空間電圧ベクトル変調法を取り上げ,補助共振転流回路部の動作時間が正弦波出力電圧波形の生成精度に与える悪影響及びその対策について考察した結果について述べる.

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  • ZVZCS共振スナバとZVS共振スナバを用いたソフトスイッチングPWMインバータの電磁ノイズ評価と検討

    吉田 正伸, 広田 慶彦, 平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. B, 通信 = The transactions of the Institute of Electronics, Information and Communication Engineers. B   87 ( 5 )   726 - 732   2004年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,三相電圧形インバータの高性能化・高効率化・低電磁ノイズ化の実現のために,部分共振転流スナバ回路を用いたソフトスイッチングPWMインバータを取り上げている.まず,従来のZVS(ゼロ電圧スイッチング)-PWMインバータの一回路方式として共振ACリンクスナバ方式ZVS-PWM三相電圧形インバータを提案し,その回路動作を説明している.次に共振ACリンクスナバ方式ZVS-PWMインバータの伝導性コモンモードノイズとノーマルモードノイズを直流入力バスラインに接続した擬似電源回路網とスペクトルアナライザを用いて測定している.その測定結果よりZVS-PWMインバータでは従来ハードスイッチングインバータに対してコモンモードノイズの低減効果がある一方でノーマルモードノイズが低減できていないことを指摘している.次に,インバータ主スイッチをZVSかつZCS(ゼロ電流スイッチング)動作可能な複合共振ブリッジレッグリンクスナバ方式(Hybrid Resonant Commutation Bridge Leg Link Snubber : HRCB)のZVZCS-PWM三相電圧形インバータを提案し,その回路構成と動作原理を説明している.更にZVZCS-PWMインバータにおいて,伝導性電磁ノイズ評価を行い,コモンモードノイズだけでなくノーマルモードノイズも従来ハードスイッチングPWMインバータと比べて低減できることを示している.最後にZVS-PWMインバータとZVZCS-PWMインバータの伝導性電磁ノイズ測定結果より,インバータ主スイッチにおけるZVSかつZCSの完全なソフトスイッチング動作によって,コモンモード及びノーマルモード双方の伝導性電磁ノイズの低減手法として有効であることを明らかにしている.

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  • 高出力マグネトロン駆動用高周波高電圧トランスリンク直列共振形ZCS-PFM制御DC-DCコンバータ

    石飛 学, 苗井 健, 宗進 耕児, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   124 ( 4 )   352 - 359   2004年4月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a single lossless inductive snubber-assisted ZCS-PFM series resonant DC-DC power converter with a high-frequency high-voltage transformer link for industrial-use high power magnetron drive. The current flowing through the active power switches rises gradually at a turned-on transient state with the aid of a single lossless snubber inductor, and ZCS turn-on commutation based on overlapping current can be achieved in wide range pulse frequency modulation control scheme. The high-frequency high-voltage transformer primary side resonant current always becomes continuous operation mode, by electromagnetic loose coupling design of the high-frequency high-voltage transformer and the magnetizing inductance of the high-frequency high-voltage transformer. As a result, this high-voltage power converter circuit for the magnetron is possible to achieve a complete zero current soft switching under a condition of the broad width gate voltage signals. Furthermore, this high-voltage DC-DC power converter circuit can regulate the output power from zero to full over audible frequency range because of two resonant frequency circuit design. Its operating performances are evaluated and discussed on the basis of the power loss analysis simulation and the experimental results from a practical point of view.

    DOI: 10.1541/ieejias.124.352

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  • 新型複合共振転流ブリッジレッグリンクスナバを用いた三相電圧形ZVZCS-PWMインバータと実証評価

    平木 英治, 吉田 正伸, 広田 慶彦, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   124 ( 3 )   286 - 294   2004年3月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents the newly-proposed hybrid resonant commutation bridge leg link (HRCB) snubber circuit which can achieve zero voltage and zero current soft-switching commutation for single-phase and three-phase voltage source-type inverter, along with its unique features and operation principle. The circuit parameter design approach for the HRCB snubber circuit and the determination estimating scheme of the gate pulse timing processing which is more suitable and acceptable for single-phase and space voltage vector modulated three-phase voltage source inverter using the HRCB snubber circuit are described in this paper. In particular the three-phase voltage source soft-switching inverter associated with the proposed HRCB circuits are evaluated and discussed from simulation and experimental viewpoint. The practical effectiveness of the HRCB snubber-assisted three-phase voltage source soft-switching inverter using IGBT power modules which is based on the instantaneous space voltage vector modulation is clarified on the output voltage waveform, actual efficiency and electromagnetic noises in comparison with three-phase voltage source-type conventional hard-switching inverter.

    DOI: 10.1541/ieejias.124.286

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  • 補助共振レッグリンクスナバを用いたソフトスイッチングインバータ

    藤井 勇馬, 今村 公輔, 中村 萬太郎, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   103 ( 653 )   5 - 8   2004年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,補助共振レッグリンク(ARLL)スナバ回路を用いた電圧形インバータを提案している.提案するARLLスナバは,電圧形インバータのソフトスイッチング化回路方式の一つである.本論文では,ARLL回路の制御タイミング,および各種パラメータの設計方法について述べている.単相ARLLインバータの試作実験機において,ソフトスイッチング動作の確認と電力変換効率の測定を行い,実験結果から本回路方式の有効性を検討している.

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  • ブリッジ形共振ACリンクスンバ方式三相正弦波ソフトスイッチングPWMインバータの性能評価

    伊与森 尚, 長井 真一郎, 吉田 正伸, 平木 英治, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2004 ( 47 )   7 - 11   2004年1月

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  • 新ゲートパルスパターンによるアクティブ補助共振スナバ方式ソフトスイッチングPWMインバータとその応用

    白石和洋, 小倉弘穀, 中村万太郎, 藤井勇馬, 平木英治, 中岡睦雄, LEE H W

    電気学会産業応用部門大会講演論文集   2004 ( 1 )   2004年

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  • 高周波パルス変調ソフトスイッチングインバータの現状と技術動向

    平木英治, 長井真一郎

    電気学会全国大会講演論文集   2004 ( 4 )   2004年

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  • 新電圧ベクトル変調パルスパターン制御3レベル三相電圧形ソフトスイッチングインバータ

    山本 真義, 佐藤 伸二, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 12 )   1397 - 1405   2003年12月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a novel prototype of 3-level 3-phase voltage-fed soft switching commutation inverter with two Active Auxiliary Resonant DC Link (ARDCL) snubbers which can operate under a condition of Zero Voltage Switching (ZVS) transition. Its operating principle is described herein. The feasible steady-state performances of the proposed soft switching commutated inverter using the latest IGBTs such as planner type and trench type IGBTs, which is more suitable for power systems applications, are evaluated and discussed on the basis of its experimental results and simulation ones.

    DOI: 10.1541/ieejias.123.1397

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  • 2次側アシストソフトスイッチング高周波リンクPWM DC/DCコンバータ

    佐藤 伸二, モイセエフ セルゲイ, 石飛 学, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 12 )   1414 - 1421   2003年12月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    Advanced development of the high frequency pulse modulated DC/DC power converters are indispensable in order to achieve smaller size, higher performances of the power supplies. In resent years the problems of the electromagnetic noise generation caused by the hard-switching pulse width modulation (PWM)&mdash;based high frequency operation of the switching power devices have been significant, including switching losses and switching surges. As result a variety of soft-switching power conversion circuit technologies have been attracted special interests for reducing switching power losses and minimizing electromagnetic interference. The soft-switching pulse modulation of DC/DC power circuit topologies can be divided into continuous current mode resonant type and quasi-resonant voltage mode type. The soft-switching DC/DC converters, a continuous current mode zero current soft-switching (ZCS) DC/DC converter with pulse frequency modulation (PFM) has been already put into a practical use. In this sort of power converters soft-switching commutation can be achieved over wide load variation ranges and high stability can be also performed, but high current peak stress through power semiconductor devices arises, however, and it causes relatively large increase of conduction power losses in the power semiconductor devices, high frequency transformers as well as rectifier diodes. As a result, the problem of a high efficiency for DC/DC power converter could not still unsolved.<br>Thereupon, in this paper, quasi-resonant voltage mode based soft-switching PWM DC/DC power converter with a high frequency transformer link is presented, which has on/off assisted synchronous rectifier in its secondary side. The PWM operation of this converter is described in comparison with conventional one. Due to using power MOSFET as on/off assisted synchronous rectifier in the secondary side of the high frequency isolated transformer, it is possible to achieve stable zero voltage soft-switching (ZVS) conditions from no load to the rated load for minimum requirement of a magnetizing current. As result of a high value of the magnetizing inductance design, the power converter actual efficiency of this converter can be designed so as to above 97% in experiment. Moreover, results of a switching losses analysis are discussed from an experimental point of views in this paper. The effectiveness of the power converter treated hare is proved from a practical point of view by using 32kHz-2.5kW breadboard setup.

    DOI: 10.1541/ieejias.123.1414

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  • 瞬時空間電圧ベクトル正弦波変調3相電圧形ソフトスイッチングインバータの時分割出力パルスパターンと波形生成精度に関する考察

    吉田 正伸, 平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. B, 通信 = The transactions of the Institute of Electronics, Information and Communication Engineers. B   86 ( 11 )   2417 - 2422   2003年11月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,3相電圧形インバータヘのソフトスイッチングPWM技術導入の一手法として共振インダクタ一括形共振ACリンクスナバ回路を提案しその回路動作について述べている.次に,本共振ACリンクスナバ回路を導入したソフトスイッチングインバータの正弦波変調法として瞬時空間電圧ベクトル正弦波変調が正弦波三角波比較変調方式に比べて適していることを説明し,本共振ACリンクスナバ回路の動作原理に基づいた時分割パルスパターンについて提案している.更に,時分割パルス出力法を用いてソフトスイッチングインバータを正弦波変調した場合には出力可能なパルス幅に制限があり,短い出力パルス幅の場合には補正が必要であることを言及し,補正パルスパターンの発生原理と波形ひずみの関係について詳述し,最小パルス幅補正を行った際のシミュレーション解析結果を図示している.最後に本共振ACリンクインバータに対して,その時分割パルスパターンの特徴を利用した最小パルス幅補正の必要のない時分割パルスパターンを新しく提案し,その出力パルスパターンに対してシミュレーション解析を行った結果からその有効性を明らかにしている.

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  • 一括インダクタ形共振ACリンクスナバを用いた三相電圧形ソフトスイッチングインバータの性能評価

    吉田 正伸, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 11 )   1269 - 1275   2003年11月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a novel three-phase voltage source type soft-switching inverter using the main and auxiliary IGBT power module packages in order to reduce their switching power losses as well as its electromagnetic noises. A single inductor-assisted resonant AC link snubber circuit as one of some resonant snubbers to achieve the zero voltage soft-switching for the three-phase voltage source inverter (VSI) with instantaneous space voltage vector sinewave modulation strategy is originally demonstrated as compared with the other resonant AC link snubber circuit topologies. In addition to this, its operation principle and unique features are described in this paper for resistive and inductive loads. Furthermore, the practical basic operating performances of the new instananeous space vector modulated soft-switching VSI using IGBT power modules are evaluated and discussed on the basis of power conversion efficiency and electromagnetic conductive and radiative noises from an experimental point of view, as compared with those of hard-switching VSI.

    DOI: 10.1541/ieejias.123.1269

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  • MRI傾斜磁場発生用多並列ブリッジ電流増幅器とディジタル最適制御設計法

    渡辺 修治, 高野 博司, 福田 博也, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 8 )   894 - 902   2003年8月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper deals with a digital control scheme of multiple paralleled high frequency switching current amplifier with four-quadrant chopper for generating gradient magnetic fields in MRI (Magnetic Resonance Imaging) systems. In order to track high precise current pattern in Gradient Coils (GC), the proposal current amplifier cancels the switching current ripples in GC with each other and designed optimum switching gate pulse patterns without influences of the large filter current ripple amplitude. The optimal control implementation and the linear control theory in GC current amplifiers have affinity to each other with excellent characteristics. The digital control system can be realized easily through the digital control implementation, DSPs or microprocessors. Multiple-parallel operational microprocessors realize two or higher paralleled GC current pattern tracking amplifier with optimal control design and excellent results are given for improving the image quality of MRI systems.

    DOI: 10.1541/ieejias.123.894

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  • 回転型新エネルギー分散電源用三相ソフトスイッチングPWM高力率整流器

    藤井 勇馬, 山本 真義, 白石 和洋, 平木 英治, 中岡 睦雄

    電気設備学会全国大会講演論文集   21   181 - 182   2003年8月

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  • 2石補助共振DCリンクスナバを用いた三相電圧形ソフトスイッチングPWMインバータの直流電圧利用率改善

    長井 真一郎, 佐藤 伸二, 山本 真義, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 6 )   710 - 716   2003年6月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    In recent years, a resonant snubber to minimize switching power losses and EMI noises have attracted special interest for the voltage-fed soft switching sinewave PWM inverters and active rectifiers. The authors have discussed the performance evaluations on lower noise and high efficiency for two switch auxiliary resonant DC link snubber assisted three-phase voltage-fed soft switching PWM inverter. It was proved that cost effective three phase soft switching inverter treated here is able to improve both efficiency and EMI noise. However, some practical problems to be improved have recognized for the soft-switching three phase PWM inverter treated here from a practical point of view. This three phase soft-switching inverter with two switch type auxiliary resonant DC link snubber has significant disadvantages of DC busline link voltage reduction for the existence of the zero voltage mode transition period as well as the larger size and physical volume of electrolytic capacitor incorporated into the resonant DC link snubber. The additional technology to minimize the busline DC link zero voltage period in order to overcome the practical problems mentioned above is newly proposed in this paper. From experimental and simulation viewpoints, the modified version of this soft-switching inverter is discussed and evaluated for the DC busline voltage utilization factor as compared with the previously developed one.

    DOI: 10.1541/ieejias.123.710

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  • デュアルモードPFM直列共振ZCS高周波インバータを用いた多倍圧整流コンバータの過渡・定常特性改善

    〓 恩輝, ガマゲ ラクナース, 石飛 学, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 6 )   649 - 659   2003年6月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    The A variety of switched-mode high voltage DC power supplies using voltage-fed type or current-fed type high-frequency transformer resonant inverters using MOS gate bipolar power transistors; IGBTs have been recently developed so far for a medical-use X-ray high power generator. In general, the high voltage high power X-ray generator using voltage-fed high frequency inverter with a high voltage transformer link has to meet some performances such as (i) short rising period in start transient of X-ray tube voltage (ii) no overshoot transient response in tube voltage, (iii) minimized voltage ripple in periodic steady-state under extremely wide load variations and filament heater current fluctuation conditions of the X-ray tube. <BR>This paper presents two lossless inductor snubber-assisted series resonant zero current soft switching high-frequency inverter using a diode-capacitor ladder type voltage multiplier called Cockcroft-Walton circuit, which is effectively implemented for a high DC voltage X-ray power generator. This DC high voltage generator which incorporates pulse frequency modulated series resonant inverter using IGBT power module packages is based on the operation principle of zero current soft switching commutation scheme under discontinuous resonant current and continuous resonant current transition modes. This series capacitor compensated for transformer resonant power converter with a high frequency transformer linked voltage boost multiplier can efficiently work a novel selectively-changed dual mode PFM control scheme in order to improve the start transient and steady-state response characteristics and can completely achieve stable zero current soft switching commutation tube filament current dependent for wide load parameter setting values with the aid of two lossless inductor snubbers. It is proved on the basis of simulation and experimental results in which a simple and low cost control implementation based on selectively-changed dual-mode PFM for high-voltage X-ray DC-DC power converter with a voltage multiplier strategy has some specified voltage pattern tracking voltage response performances under rapid rising time and no overshoot in start transient tube voltage as well as the minimized steady-state voltage ripple in tube voltage.

    DOI: 10.1541/ieejias.123.649

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  • ソフト転流高周波インバータと IH スーパーヒーテッドスチーマ

    藤田 堅太郎, Ahmed Tarek, Gamage Laknath, 平木 英治, 中岡 睦雄, 木船 弘康, 畑中 義博

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   103 ( 38 )   67 - 72   2003年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では位相シフトPWM制御方式を用いたロスレスキャパシタスナバ支援フルブリッジ高周波直列負荷共振インバータを取り上げ,その軽負荷域でのゼロ電圧ソフト補助共振ACリンクスナバスイッチング特性を改善した高周波ソフトスイッチング直列共振インバータを提示し新方式デュアルモード制御高周波インバータに対しシミュレーションと試作実験による性能評価を図説・検討している。さらに,新方式インバータを用いたデュアルパックスIHヒータ形流体加熱システムについて性能評価検討をしている。

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  • 最小部品点数構成のソフトスイッチング高周波インバータ

    西田 知正, Gamage Laknath, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   103 ( 38 )   61 - 66   2003年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年、家電民生や業務民生の電気エネルギー利用応用分野において電磁誘導加熱(Induction Heating; IH)応用機器は食品調理・加工をはじめとして、床暖房、給湯、過熱蒸気洗浄など用いられている。本論文では電磁誘導加熱に用いられる電力変換回路について,2石アクティブクランプZVS-PWMインバータに比べて、使用する回路部品点数を極力抑えソフトスイッチング(S-SW)動作領域が拡大できるコストエフェクティブな新方式高周波ソフトスイッチングPWMインバータいわゆる一石型インバータとアクティブクランプインバータの中間的な回路トポロジーと位置付けられる回路方式を提案し、電磁誘導加熱調理器に応用した場合における動作原理と特徴について述べている。

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  • 高昇圧変換比をもつゼロ電圧ソフトスイッチング高周波PWM昇圧チョッパ形DC-DCコンバータ

    イナバ クラウジオ ユウジ, 小西 義弘, 平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. B, 通信 = The transactions of the Institute of Electronics, Information and Communication Engineers. B   86 ( 3 )   599 - 603   2003年3月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

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  • 2相並列高周波PWMチョッパ形電力増幅器を用いた傾斜磁場電流マルチループフィードバック追従制御

    渡辺 修治, 高野 博司, 福田 博也, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   123 ( 3 )   188 - 195   2003年3月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper deals the digital optimal current control scheme to improve MRI (Magnetic Resonant Imaging) Gradient-Magnetic Coil (GC) current control implementation. The GC current needs high precision control specifications so as to take clear images with MRI. The novel MRI-GC current control amplifier has the high-frequency PWM chopper circuit with a multi-parallel input structure. The GC current control circuit can prevent the current ripple amplitude and realize high precision GC current controls, but the control system is hard to design because the GC current control circuit has the multi-input and multi-output structure and required high precision control abilities. Therefore, the digital optimal control scheme has tried to apply for the GC current control. The optimal controller is skillful at the design of multi-input and multi-output systems. The novel controller will actualize the high precision GC current controllability because Error System newly includes the GC current error parameter so as to decide the multi-inputs. In this paper, we discuss the novel controller with computer simulations that it can expect the high precision GC current control to improve the image quality of MRI systems.

    DOI: 10.1541/ieejias.123.188

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  • 共振開始初期電流を必要としないアクティブ補助共振転流スナバを用いたインバータの性能評価

    中村 萬太郎, 山崎 貴幸, Chandhaket Srawouth, AHMED Tarek, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   102 ( 643 )   31 - 36   2003年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では、無停電電源、電力系統連系分散型燃料電池発電電源、マイクロガスタービン・風力タービン駆動発電装置、電気鉄道補助電源、アクティブパワーフィルタなど各種の電圧形インバータ応用装置として、補助スイッチを持つアクティブ補助共振スナバを用いた新方式部分共振PWMブリッジインバータを新提案し、そのソフトスイッチングパルス変調(PWM)方式並びに補助共振スナバ回路の最適設計条件について述べている。すなわち本ソフトスイッチングPWMインバータ方式は主スイッチの他に補助スイッチを含む部分共振スナバ回路が必要であるが、主スイッチおよび補助スイッチともにZVSまたはZCSによるソフトスイッチングを実現し、各スイッチのスイッチング損失の低減とインバータのノイズの低減が可能となる方式である。本電圧形インバータ回路の補助スイッチと共振スナバ回路は主スイッチがスイッチング動作する時点のみ働き、その最適回路設計をすることにより補助スイッチおよび共振スナバ回路の電流値を負荷電流値レベルに押さえることが可能である他、かつスイッチング時の電圧または電流の立上り立下り時間を設定することもできる。また本回路方式においてはソフトスイッチング動作を行うために特別の電圧または電流の検出回路を含むシステムの制御に持ち込む必要がない。この回路方式は直流電源の中点電位を必要としない。一般のソフトスイッチングPWM技術と同様であるが、パワー半導体スイッチのスイッチング時間特性と導通時の飽和電圧降下特性にトレードオフの関係があるため、飽和電圧降下特性の改善に特化したパワー半導体スイッチ(IGBT)を適用すれば一層の効率向上が可能となることを言及している。

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  • 系統連系高周波2石フライバックトランス絶縁方式ソフトスイッチングPWM正弦波インバータ

    チャンタケート サラウット, 小西 義弘, 小倉 弘毅, 平木 英治, 中岡 睦雄

    パワーエレクトロニクス学会誌   29 ( 2 )   54 - 61   2003年

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    出版者・発行元:パワーエレクトロニクス学会  

    This paper presents two novel prototypes of the utility AC power source connected sinewave inverter using the high-frequency two-switch flyback transformer which is more suitable and acceptable for the small-scale solar photovoltaic and fuel cell generator interfaced power conditioners. The proposed sinewave soft-switching PWM power conditioner with a high-frequency AC link has a function of electrical isolation including sinewave hard-switching PWM power conditioner with a high frequency link, which is considered for solar photovoltaic power conditioner and fuel cell generator related power conditioner from the viewpoints of safety and reliability in total system. The discontinuous conduction mode (DCM) operation of the flyback transformer in this circuit system is also introduced to feature a simple, low-cost and high-efficiency topology of the sinewave inverter circuit and digital control implementation. The operating principle of the proposed sinewave soft-switching PWM inverter circuit as compared with sinewave hard-switching PWM inverter are described for the designing of circuit parameters. Moreover, the digitally controlled sinewave PWM control processing scheme is presented herein. Finally, the sinewave soft-switching PWM inverter prototype is actually built and tested to verify the validity of the proposed power conditioner for new energy generation systems.

    DOI: 10.5416/jipe2003.29.2_54

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  • 三相電圧形ZVZCS-PWMインバータの特性評価と検討

    吉田正伸, 藤井勇馬, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2003 ( 1 )   2003年

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  • 昇圧チョッパ型入力段を持つ三相電圧形ソフトスイッチングインバータの電力変換効率推定

    平木英治, 吉田正伸, 中岡睦雄

    電気学会全国大会講演論文集   2003 ( 4 )   2003年

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  • ZCS&ZVS補助共振レッグリング形インバータとその実証評価

    広田慶彦, 吉田正伸, 平木英治, 中岡睦雄, 篠原貞夫, 古川勝彦

    電気学会半導体電力変換研究会資料   SPC-03 ( 25-28.30-36 )   2003年

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  • パルス密度変調制御負荷共振形高周波インバータと新しい応用

    GAMAGE L, 松田樹也, 村岡秀和, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-03 ( 150-152.154-161 )   2003年

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  • 新しい共振スナバを持つ三相正弦波ZVS-PWMインバータ

    中村万太郎, 白石和洋, 今村公輔, AHMED T, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-03 ( 134-149 )   2003年

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  • 直流昇圧型ソフトスイッチングPWMチョッパの電磁ノイズ評価

    小倉弘毅, CHANDHAKET S, AHMED T, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-03 ( 104-110 )   2003年

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  • ブリッジ形共振ACリンクスナバを用いた三相電圧形インバータと性能評価

    伊与森尚, 吉田正伸, 長井真一郎, 平木英治, 中岡睦雄

    電気学会全国大会講演論文集   2003 ( 4 )   2003年

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  • 高周波リンク電流形ZVS-PFM並列共振DC/DCコンバータ

    苗井健, 石飛学, GAMAGE L, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-03 ( 25-28.30-36 )   2003年

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  • 高周波共振型インバータを用いた液晶バックライト誘電体バリア放電ランプの性能評価

    藤田 堅太郎, 谷松 弘章, Gamage Laknath, 村岡 秀和, 平木 英治, 中岡 睦雄

    照明学会 全国大会講演論文集   36   17 - 17   2003年

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    記述言語:日本語   出版者・発行元:一般社団法人 照明学会  

    液晶バックライト用ランプとしてCCFL(冷陰極蛍光ランプ)が幅広く用いられている。環境リサイクルの点から水銀フリーが要求され、液晶バックライト用として注目されている。誘電体バリヤ放電ランプの電気回路モデル(非線形容量モデル)を提示し、その定数測定法を明らかにする。次に、ローコスト・高効率電圧共振型インバータを用いて誘電体バリヤ放電ランプを駆動させたときの特性について述べている。さらに、調光制御としてパルス密度変調方式を導入しその有効性を述べている。本文の内容としては、(1)誘電体バリヤ放電ランプの構造と電気的等価回路、(2)電気回路のパラメータの測定法と数値例、(3)一石電圧共振型高周波インバータ、(4)パルス密度変調による出力変調と特徴、(5)電流共振型インバータとパルス密度変調制御、(6)性能評価と実証的検討、(7)まとめ、(8)改良型電圧共振型高周波インバータの導入と将来動向という構成で発表を行う。

    DOI: 10.11515/ieijac.36.0.17.0

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  • 共振ACリンクスナバ方式三相電圧形インバータの伝導性・放射性電磁ノイズ評価と検討

    吉田正伸, 平木英治, 中岡睦雄, 篠原貞夫, 古川勝彦

    電気学会全国大会講演論文集   2003 ( 4 )   2003年

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  • マグネトロン駆動用高周波高電圧トランスリンク電流形ZVS-PFM DC-DC電力変換器と特性評価

    石飛 学, 苗井 健, 平木 英治, 中岡 睦雄

    パワーエレクトロニクス学会誌   29 ( 2 )   48 - 53   2003年

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    出版者・発行元:パワーエレクトロニクス学会  

    We have considered a voltage-source type series-resonant ZCS-PFM DC-DC Converter in order to drive an industrial-use magnetron for generating high power microwave in advance. This DC-DC converter can achieve a complete zero current soft switching by assist of the transformer parasitic parameter and a lossless inductive snubber. And the output power is regulated over all power ranges without audible frequency range due to the magnetizing current of the high-frequency transformer. However, this DC-DC converter has a weak point that it is easy to oscillate by the parasitic capacitance of the switching device and the lossless inductive snubber. Therefore in this paper, the new topology that can solve that weak point without hurting good characteristics of that converter is proposed and evaluated on the basis of simulation and experimental results.

    DOI: 10.5416/jipe2003.29.2_48

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  • パワー半導体デバイスの実測データに基づく半導体電力変換装置の簡易電力損失分析シミュレータの開発

    平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   122 ( 12 )   1142 - 1143   2002年12月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper deals with a feasible power loss analysis simulator which can actually estimate the power losses of switching mode power converters using IGBTs. The power loss analysis simulator proposed newly is based upon the feasible measured switching power loss data tables and v-i characteristics data tables of power semiconductor power devices; IGBT and diodes. The effectiveness of practical simulation technique, which can discuss power loss evaluations for three phase PWM inverter, is confirmed from the viewpoints of the newly proposed simulation and experimental results.

    DOI: 10.1541/ieejias.122.1142

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  • 共振ACリンク方式三相電圧形インバータの電磁ノイズ評価

    吉田 正伸, 平木 英治, 中岡 睦雄

    電気学会研究会資料. EDD, 電子デバイス研究会   2002 ( 83 )   13 - 18   2002年11月

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  • アクティブ補助共振転流スナバインバータの新スイッチングシーケンスによるPWMパターン

    中村 萬太郎, 山崎 貴幸, Ahmed Tarek, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   102 ( 475 )   25 - 30   2002年10月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では無停電電源、商用連系分散型電源など各種のインバータ応用装置として、補助スイッチを持つアクティブ補助共振スナバを用いた部分共振ブリッジインバータを提案し、そのソフトスイッチングパルス変調方式並びに補助共振スナバ回路の最適設計条件について述べている。すなわち本インバータ方式は主スイッチの他に補助スイッチを含む部分共振スナバ回路が必要であるが、主スイッチおよび補助スイッチともにZVSまたはZCSによるソフトスイッチングを実現し、各スイッチのスイッチング損失の低減とインバータのノイズの低減が可能である。本回路の補助スイッチと共振スナバ回路は主スイッチがスイッチング動作する時点のみ働き、その最適設計をすることにより補助スイッチおよび共振スナバ回路の電流値を負荷電流値レベルに押さえることが可能である他、かつスイッチング時の電圧または電流の立上り立下り時間を設定することもできる。また本回路方式においてはソフトスイッチング動作を行うために特別の電圧または電流の検出回路をシステムの制御に持ち込む必要がない。この回路方式は直流電源の中点電位を必要としない。一般のソフトスイッチング技術と同様であるが、パワー半導体スイッチのスイッチング時間特性と導通時の飽和電圧降下特性にトレードオフの関係があるため、電圧降下特性の改善に特化したパワー半導体スイッチを適用すればさらに一層の効率向上が可能となることを言及している。

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  • 新方式高周波直列共振形ソフトスイッチングPFMチョッパ制御方式直流昇圧DC-DCコンバータ

    〓 恩輝, チャンタケート サラウット, 中村 萬太郎, 平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. C, エレクトロニクス = The transactions of the Institute of Electronics, Information and Communication Engineers. C   85 ( 10 )   917 - 924   2002年10月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,まず,広い出力電圧制御設定域,入力電圧の変動域,負荷変動外乱に対して,安定なゼロ電流ソフトスイッチング(ZCS)動作ができる非絶縁回路トポロジーとなり得る新方式高周波直列共振形ZCS-PFMチョッパ制御直流昇圧DC-DCコンバータを提案している.次に本論文では,その定常回路動作と特徴を述べ,開ループ出力電圧制御特性を図説しかつ評価検討を行っている.更に,シミュレーション解析と試作実験により,本提案直流昇圧DC-DCコンバータの動作と性能評価を行い,その有効性を明らかにしている.

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  • 補助共振スイッチングブロックを用いた位相シフトZVS-PWM制御高周波負荷共振インバータとその応用

    黒瀬 洋一, 奥野 敦, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   102 ( 338 )   1 - 5   2002年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では新方式のソフトスイッチングPWM高周波インバータを提案し、その動作原理と特徴を述べ、電磁誘導流体加熱応用システムに適応しての性能評価を実験データを用いて行っている。

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  • テクノロジー 高効率・低電磁ノイズ高周波スイッチングPWM電力変換装置の開発

    吉田 正伸, 平木 英治, 中岡 睦雄

    EMC   15 ( 4 )   52 - 62   2002年8月

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    記述言語:日本語   出版者・発行元:ミマツコーポレーション  

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  • 電圧形IGBTインバータ用一括インダクタ形共振ACリンクスナバの実証評価検討

    吉田 正伸, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   122 ( 6 )   617 - 623   2002年6月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a new prototype configuration of a single-phase voltage source soft switching inverter using IGBT power module packages in order to reduce switching power losses, electromagnetic noises. A single inductor-assisted resonant AC link snubber circuit as one of the resonant snubbers to achieve the zero voltage soft switching for the single-phase voltage source inverter is originally demonstrated, and its operation principle and unique features as well as the practical parameter design method of resonant AC link snubber circuit treated here is described on the basis of computer-aided simulation analysis. Furthermore, the practical operating performans of the single inductor-type resonant AC link snubber for the single-phase voltage source soft switching inverter using IGBTs are discussed and evaluated on the basis of switching power losses and electromagnetic conductive noise as compared with those of single-phase voltage source hard switching inverter from an experimental point of view.

    DOI: 10.1541/ieejias.122.617

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  • スイッチトキャパシタ形共振ACリンクスナバ回路の一検討

    伊与森 尚, 吉田 正伸, 佐藤 伸二, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   102 ( 43 )   89 - 94   2002年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では、スイッチトキャパシタ形ACサイド補助共振リンクスナバ回路を提案し、その動作原理と特徴について述べている。次に、スイッチトキャパシタ形共振ACリンクスナバを用いた三角波・正弦波比較の単相フルブリッジ正弦波ソフトスイッチングPWMインバータの出力電圧の波形特性を評価している。さらに、本正弦波ソフトスイッチングPWMインバータの電力損失分析と規約効率を使用しているIGBTやダイオードの実測v-i特性、インダクタの内部実効抵抗とパワー半導体デバイスのスイッチング損失の実測データを近似式モデルに取り入れた実用シミュレータにより評価検討した結果について図説し、本インバータの有効性について明らかにしている。

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  • X線管駆動用ゼロ電流ソフトスイッチングPFM高周波インバータ制御方式DC-DCコンバータ

    〓 恩輝, 石飛 学, Moisseev Serguei, 平木 英治, 中岡 睦雄

    電子情報通信学会論文誌. C, エレクトロニクス = The transactions of the Institute of Electronics, Information and Communication Engineers. C   85 ( 5 )   356 - 366   2002年5月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では,小容量医用X線発生直流高電圧スイッチング電源の一方式としてパルス周波数変調(PFM)制御直列トランス共振インバータ駆動方式対称コッククロフト・ウォルトン形全波多倍圧整流回路から構成されるゼロ電流ソフトスイッチング高周波リンクDC-DCコンバータ電源システムを取り上げている.まず,本コンバータの開ループ系としての過渡応答特性と定常応答特性を広く外部設定される負荷抵抗(X線管等価抵抗値)パラメータとロスレスインダクタスナバを用いた高周波トランス直列共振インバータの共振回路パラメータや制御変数としてのインバータスイッチング周波数との関係で図示し,評価検討を行っている.次に本コンバータに対して高周波インバータの周波数切換制御アルゴリズム(デュアルモードPFM制御)を取り入れた管電圧フィードバック制御系に着ける過渡特性と定常特性を正規化パラメータや正規化変数を用いて定量的な評価検討を行っている.更に,本コンバータ出力電圧の過渡応答特性と定常応答特性を縮小モデル試作器による実験結果とシミュレーション結果のもとに本ゼロ電流ソフトスイッチング高周波PFMインバータ制御方式直流高電圧スイッチング電源の有効性を明らかにしている.

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  • 小容量ソフトスイッチング昇圧形PWMチョッパ回路と性能評価

    安藤 正之, 吉次 淳二, 平木 英治, 長井 真一郎, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   101 ( 651 )   9 - 15   2002年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    インバータ・コンバータの高性能化,ダウンサイジング化に対してPWMキャリアのスイッチング周波数の高周波化が不可欠である.これらの従来からのハードスイッチングPWM方式ではスイッチング損失や電磁ノイズの増大といった問題が生じる.これを効果的に解決する方法として,ソフトスイッチングPWM技術が注目されている.本論文では,多くの新しい応用が期待されるソフトスイッチング昇圧形PWMチョッパ回路の一方式を取り上げ,その実証的な評価を行っている.次に本昇圧形チョッパと三相電圧形ソフトスイッチングインバータのシステムを取り上げのこのシステムの効率と変調率との関係などの評価及び検討を行った結果について述べている.

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  • 小容量X線管駆動用高周波直列共振形インバータ方式直流高電圧発生装置と性能評価

    〓 恩輝, 石飛 学, 平木 英治, 中岡 睦雄

    電気設備学会誌   22 ( 2 )   134 - 143   2002年2月

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    記述言語:日本語   出版者・発行元:電気設備学会  

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  • ケミコンレス共振スナバを用いた系統連系ソフトスイッチング正弦波インバータの実験的検討

    中村 萬太郎, 山崎 貴幸, 佐藤 伸二, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. CPM, 電子部品・材料   101 ( 548 )   9 - 13   2002年1月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年のエネルギー資源および環境保護の問題の顕在化に伴い、省エネルギー化推進ポリシーのもとに電気エネルギーの有効変換高度化利用の積極的導入が重要となってきている。新エネルギー利用やコ・ジェネレーションエネルギー利用の電力系統連系半導体電力変換装置の高効率化ならびに高性能化が不可欠となっている。一方、装置の小形軽量化、低騒音化、低電磁ノイズ、低対地漏れ電流化も求められており、これらの解決策としてソフトスイッチングPWM電力変換技術が注目されている。本論文では大容量対応のケミコンレスアクティブ補助共振転流スナバの一方式を提案し、電圧形単相フルブリッジ正弦波変調インバータに適用したソフトスイッチングPWMインバータを取り上げ、シミュレーションと実験により評価検討を行い、その有効性を明らかにしている。

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  • 電磁誘導流体加熱用位相シフトZVS-PWM制御高周波負荷共振インバータ

    黒瀬洋一, 平木英治, 奥野敦, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 1 )   2002年

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  • 多並列ブリッジPWM電流増幅器を用いたMRI傾斜磁場の最適制御法

    渡辺修治, 平木英治, 高野博司, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 3 )   2002年

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  • 直流リアクトルとアクティブ補助共振DCリンクスナバをもつソフトスイッチング正弦波PWMインバータの検討

    黒瀬洋一, 広田慶彦, 中村万太郎, 佐藤伸二, 平木英治, 中岡睦雄

    電子情報通信学会大会講演論文集   2002   2002年

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  • ソフトスイッチングインバータ用一括スイッチ形アクティブ補助共振ACリンクスナバ回路の一検討

    伊与森尚, 吉田正伸, 佐藤伸二, 平木英治, 中岡睦雄

    電子情報通信学会大会講演論文集   2002   2002年

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  • 新方式ARCPスナバを用いた三相ZCZVSインバータの検討

    広田慶彦, 吉田正伸, 平木英治, 佐藤伸二, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-02 ( 77-96 )   2002年

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  • バスラインゼロ電圧ホールド可能な新方式補助共振DCリンクスナバ回路と三相電圧形インバータへの適用

    広田慶彦, 中村万太郎, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 1 )   2002年

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  • ソフトスイッチング方式正弦波電力変換器の変調法

    平木英治, 中岡睦雄

    電気学会全国大会講演論文集   2002 ( 4 )   2002年

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  • ZVS&ZCS複合共振レッグリンクスナバを用いた三相電圧形インバータの検討〔含 質疑応答〕

    広田 慶彦, 吉田 正伸, 平木 英治

    パワーエレクトロニクス研究会論文誌   28   44 - 51   2002年

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    記述言語:日本語   出版者・発行元:パワーエレクトロニクス研究会  

    In this paper, a novel type of active auxiliary quasi resonant commutation leg link Snubber for three phase soft switching inverter circuit, which can be completely turned on and turned off with ZVS & ZCS hybrid mode transition is presented and discussed. The operating principle of this auxiliary hybrid resonant commutation leg link (AHRCLL) snubber circuit is described, and its optimum circuit parameters are determined from a simulation point of view. In addition to these, the performances of this resonant snubber-assisted three phase voltage source type soft switching inverter are evaluated and discussed on the basis of simulation analysis.

    DOI: 10.14913/jipe1995.28.44

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  • ソフトスイッチング正弦波PWMインバータの変調法に関する考察

    平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-02 ( 30-43 )   2002年

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  • 2石補助共振DCリンクスナバを用いた三相電圧形ソフトスイッチングPWMインバータの直流電圧利用率改善

    長井真一郎, 佐藤伸二, 山本真義, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 1 )   2002年

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  • ロスレススナバキャパシタ単独転流を利用した共振ACリンクスナバインバータ

    吉田正伸, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 1 )   2002年

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  • ブリッジ形共振ACリンクスナバ回路の一検討

    伊与森尚, 吉田正伸, 長井真一郎, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2002 ( 1 )   2002年

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  • 多重入力MRI傾斜磁場電源のディジタル最適制御

    渡辺修治, 平木英治, 高野博司, 中岡睦雄

    電気学会全国大会講演論文集   2002 ( 4 )   2002年

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  • 大容量対応アクティブ補助共振スナバの一方式とソフトスイッチングPWMインバータの検討

    中村 萬太郎, 山崎 貴幸, Rukonuzzaman Md., 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   101 ( 293 )   9 - 14   2001年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    新エネルギー源利用分散型電源システムにおける正弦波インバータのパワー半導体デバイスの高周波スイッチング時のスイッチング損失、電磁ノイズ(EMI、RFI)のノイズレベル低減を目的とした三相電圧形ソフトスイッチングインバータの回路方式として、コ・ジェネレーションシステムや2次電池電力貯蔵システムなどにみられる大容量対応に適したアクティブ補助共振転流アームリンクスナバの1回路トポロジー(ARCPの一方式)を取り扱い、この回路の動作原理と特徴を述べ、さらに実用的な回路設計法を示している。本共振スナバ回路を単相フルブリッジ正弦波PWMインバータとして用いた場合のシミュレーションによる解析と特性解析を行い、その性能評価検討した結果について述べている。

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  • ソフトスイッチングインバータ用のアクティブ補助共振DCリンクスナバの諸回路トポロジーと検討

    広田 慶彦, 吉田 正伸, Rukonuzzaman Md., 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   101 ( 293 )   15 - 21   2001年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では、正弦波パルス変調インバータのソフトスイッチング方式のうちアクティブ補助共振DCリンクスナバトポロジーに注目し、直流電源電圧を分割する3種類の回路方式を取り上げ、それぞれの回路方式において回路動作をシミュレーション解析により明らかにした。そしてそれぞれの回路方式を適用した単相ソフトスイッチング正弦波インバータの出力電圧波形を評価すると共に、パワー半導体デバイス(IGBT及びダイオード)の導通損失とスイッチング損失の実測データから求めた近似式をプログラムに組み込むことによりシミュレーションにおいて総合効率の評価・検討を行った結果について述べている。

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  • アクティブ補助共振転流スナバ方式三相電圧形ソフトスイッチングインバータ

    山元 久明, 岩本 英雄, 吉田 正伸, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   121 ( 7 )   823 - 824   2001年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a three phase voltage source space voltage vector modulated soft switching inverter using bridge leg-side active auxiliary resonant commutation snubbers (ARCS) with a high frequency pulse current transformer which is designed for power regeneration to DC source, along with its performance evaluations under a digital servo control scheme.

    DOI: 10.1541/ieejias.121.823

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  • 3レベル三相電圧形ソフトスイッチングインバータの実証的評価

    山本 真義, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   121 ( 7 )   821 - 822   2001年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a novel type of 3-level 3-phase voltage-fed soft switching inverter with two new Auxiliary Resonant DC Link (ARDCL) snubbers topologies which can operate under a condition of Zero Voltage Switching (ZVS). The feasible operating performances of the proposed soft switching inverter using IGBT module which is more suitable for power systems applications is evaluated on the basis of its experimental results.

    DOI: 10.1541/ieejias.121.821

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  • MRI傾斜磁場発生用PWM電力増幅器の電流パターン追従ディジタル最適予見制御

    渡辺 修治, 高野 博司, 平木 英治, 中岡 睦雄

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   121 ( 7 )   756 - 763   2001年7月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper deals with a two-paralleled switch-mode PWM power amplifier using current pattern tracking scheme in order to generate a gradient magnetic field in the Magnetic Resonance Imaging (MRI) system. This power conversion circuit has 8-IGBTs at their inputs/outputs so as to realize further high-power density, and to reduce current switching ripple of the Gradient Coils (GCs) as well as to raise current responses. The modern optimal preview control implementation in 2 parallel bridge type PWM power amplifier can improve the quick and precise current pattern tracking control responses in accordance with the specified values for the magnetic field in GCs. It is clearly proven from a theoretical point of view that the proposed control software is to be enlarged highly the diagnostic target and improves the image quality of MRI systems.

    DOI: 10.1541/ieejias.121.756

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  • パルス電流トランス付アクティブ補助共振転流スナバと最適回路設計

    山元 久明, 平木 英治, 奥野 敦, 中岡 睦男

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   121 ( 4 )   522 - 523   2001年4月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents a novel prototype of auxiliary resonant commutated snubber (ARCS) which incorporates a high frequency pulse current transformer with power regeneration diode loop, along with its practical design considerations.

    DOI: 10.1541/ieejias.121.522

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  • B-9-9 補助共振転流スナバ方式3レベル三相電圧形ソフトスイッチングインバータ

    山本 真義, 平木 英治, 中岡 睦雄

    電子情報通信学会総合大会講演論文集   2001 ( 2 )   423 - 424   2001年3月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

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  • ソフトスイッチングインバータ電力損失解析シミュレータの開発

    平木 英治, 山本 真義, 中村 萬太郎, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   100 ( 628 )   25 - 30   2001年2月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    スイッチングモード半導体電力変換装置にソフトスイッチング技術も導入することで、スイッチング電力損失や電圧・電流サージを大幅に低減することが可能である。しかしながらシステム全体の電力変換効率は、新たに負荷する補助共振転流回路で損失が発生してしまうため、スイッチング損失の減少分と、新たな増加分の関係により決定される。そこで本稿では、数kW級の養老を持つ小型インバータ試験器の実験結果から導出した電力損失計算テーブルを元にインバータの電力損失を定量的に解析することが可能な、比較的単純な構造をもつ電力損失分析シミュレータを構築し、大容量インバータへのソフトスイッチング導入効果を評価・検討した。

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  • 汎用DSPを用いた磁場電流制御システムの特性評価

    渡辺修治, 西田克美, 高野博司, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2001 ( 2 )   2001年

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  • 一括インダクタ形ACリンクスナバインバータと実証的性能評価

    吉田正伸, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2001 ( 3 )   2001年

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  • 永久磁石方式ACサーボモータ駆動用ソフトスイッチングインバータの検討

    吉次淳二, 井上堅治, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2001 ( 3 )   2001年

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  • 高周波パルス電流トランスを用いた三相電圧形ソフトスイッチングインバータとその実証評価

    山元久明, 平木英治, 中村万太郎, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-01 ( 26-37 )   2001年

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  • スパイラルプレナー構造電磁誘導発熱体による遠赤外線放射加熱システム用インバータ

    定方秀樹, 田中秀明, MOISSEEV S, 平木英治, 中岡睦雄, 荻原弘之

    電気学会半導体電力変換研究会資料   SPC-01 ( 113-121 )   2001年

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  • 共振ACリンクスナバを用いたソフトスイッチングインバータと実証評価

    吉田正伸, 小倉弘毅, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-01 ( 26-37 )   2001年

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  • 共振DCリンクスナバの諸回路方式と電圧形インバータヘの適用

    広田慶彦, 奥野敦, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-01 ( 113-121 )   2001年

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  • 補助共振転流アームリンク3レベル三相電圧形ソフトスイッチングインバータ

    山本真義, 平木英治, 中岡睦雄

    電気学会半導体電力変換研究会資料   SPC-01 ( 113-121 )   2001年

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  • 電流利用率を改善した共振DCリンク三相電流形PWMコンバータ

    石橋正基, 小西義弘, 平木英治, 中岡睦雄

    電気学会産業応用部門大会講演論文集   2001 ( 2 )   2001年

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  • アクティブ共振DCリンクスナバを用いたソフトスイッチングPDM電流形並列共振高周波インバータ

    馮 越路, 小西 義弘, Koudriavtsev Oleg, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   100 ( 304 )   1 - 7   2000年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    近年、無声放電原理はオゾナイザ、CO2レーザー、UV-エキシマランプおよびプラズマディスプレーパネルなど産業応用分野で広く応用されている。オゾン発生用高周波DC/AC変換インバータにおいては、オゾン発生管負荷の要求、制御性の良い利点から、PDM&PWM複合制御方式が用いられている。同時に、高周波動作のため、スイッチング損失の少ない負荷共振ソフトスイッチング方式の検討が始まっている。本論文では、オゾナイザ電源としての電流形インバータ用ソフトスイッチング技術としては、スイッチト・キャパシタ形部分アクティブ共振DCリンク(RDCL)回路を用いた新しい電流形用ゼロ電流ソフトスイッチング方式を提案し、無声放電オゾン発生管駆動高周波高電圧電源にパルス密度変調制御方式電流形負荷並列共振インバータを適用した時の動作特性について述べている。また、本論文では、本提案回路の動作原理を明らかにするとともに、アクティブ共振DCリンクスナバ回路の実用設計法と数値例を示している。さらに、無声放電オゾン発生管駆動用新オゾンナイザー電源システムの定常動作特性と制御電力特性について述べている。

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  • パルス電流回生アクティブ補助共振スナバを用いたソフトスイッチングインバータ

    Inaba Claudio Yudi, 中村 萬太郎, 吉田 正伸, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   100 ( 304 )   17 - 24   2000年9月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では, 高周波パルス電流回生用トランスを用いたアクティブ補助共振転流スナバ回路(新ARCS)を取り上げ, その回路動作原理と特徴について述べている.新補助共振スナバ回路は従来のARCSと比較すると, 直流バスライン電圧2分割平滑キャパシタがなく, 共振初期開始電流を与える必要がないため電圧センサー・電流センサーを必要としないセンサレスにできる他, 補助共振スナバのパワー半導体デバイスにおけるストレスの低減ができる。次に, 提案のARCSの設計条件と手順を示している。これを用いたディジタル制御瞬時空間ベクトル変調正弦波3相CVCFソフトスイッチングインバータの特性解析を行い, 従来のハードスイッチング方式と評価・比較検討している。

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  • 高周波ソフトスイッチングインバータを用いた電磁誘導流体加熱装置

    金田 充, 平木 英治, 中岡 睦雄, 弘田 泉生, 大森 英樹

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   120 ( 8 )   1088 - 1089   2000年8月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents an electromagnetic induction eddy current-based continuous fluid heating appliance using voltage-fed quasi resonant high-frequency soft switching inverter with time ratio control scheme. Its power regulation characteristic are illustrated and this new consumer appliance is evaluated on the basis of its computer simulation and 4kW experimental setup.

    DOI: 10.1541/ieejias.120.1088

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  • 部分共振ZVS-PWM制御高周波インバータの近似電力算定式

    金田 充, 平木 英治, 中岡 睦雄, 弘田 泉生, 大森 英樹

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   120 ( 8 )   1086 - 1087   2000年8月

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    記述言語:日本語   出版者・発行元:一般社団法人 電気学会  

    This paper presents an approximate equation to evaluate the regulated output power of asymmetrical ZVS-PWM high frequency quasi resonant inverter for induction heating. Its approximate output power regulation characteristics derived from a theoretical point of view are discussed for induction heating loads as compared with the simulation results.

    DOI: 10.1541/ieejias.120.1086

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  • 小容量PMモータ駆動制御用三相空間電圧ベクトル変調形ソフトスイッチングインバータの性能評価(その1)

    吉次 淳二, 井上 堅治, 安藤 正之, 平木 英治, 中岡 睦雄

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術   100 ( 215 )   41 - 47   2000年7月

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    記述言語:日本語   出版者・発行元:一般社団法人電子情報通信学会  

    本論文では, 小容量PMモータ駆動用瞬時電圧ベクトル変調方式三相電圧形ソフトスイッチングインバータのアクティブ共振スナバとしての一括補助アクティブ共振DCリンクスナバ回路の1トポロジーを取り上げ, アクティブ補助共振スナバ回路の駆動回路インターフェースとそのソフトスイッチングモード転流動作を試作実験波形を用いて説明している。次に, 本アクティブ補助共振スナバ回路を用いた三相電圧形ゼロ電圧ソフトスイッチングインバータによるPMモータ駆動時のソフトスイッチング転流回路動作を説明している。さらに本方式の伝導性ノイズ測定結果をハードスイッチング方式のデータとの比較検討のもとに述べている。

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  • 三相電圧形ソフトスイッチング瞬時無効電力補償システムの検討

    服部 弘, 山元 久明, 平木 英治, 平地 克也, 中岡 睦雄

    電気学会研究会資料. SPC, 半導体電力変換研究会   2000 ( 1 )   31 - 36   2000年1月

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  • ロスレスキャパシタスナバと共振DCリンクスナバの併用制御ソフトスイッチングインバータ

    小田義行, 黒川学, 平木英治, 小西義弘, 中岡睦雄

    電気学会全国大会講演論文集   2000 ( 4 )   2000年

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  • MRI傾斜磁場電流制御用ZCS-PWMインバータの検討

    渡辺修治, 平木英治, 高野博司, 中岡睦雄

    電気学会全国大会講演論文集   2000 ( 4 )   2000年

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  • 多機能系統連系双方向電圧形ソフトスイッチングコンバータの検討

    山元 久明, 平木 英治, 中岡 睦雄, 平地 克