Faculty Profiles - HIRAKI Eiji

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Discrete Pulse Density Modulation Controlled Series Load Resonant High Frequency Inverter for Induction Heated Fusing Roller with Cylindrical Working Coil Stator

SUGIMURA Hisayuki, LEE Hyun-Woo, HIRAKI Eiji, TANAKA Toshihiko, NAKAOKA Mutsuo

2006 ( 87 ) 33 - 38 2006.6

A Novel Soft-Switching PWM HB DC-DC Converter with DC Rail High and Low Side Active Edge Resonant Snubbers Assisted by High Frequency Transformer Parasitic Components

AHMED Nabil A., FATHY Khairy, MORIMOTO Keiki, HIRAKI Eiji, LEE Hyun Woo, NAKAOKA Mutsuo

IEICE technical report 105 ( 601 ) 133 - 137 2006.2

Language：English Publisher：The Institute of Electronics, Information and Communication Engineers

This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type dc-dc high power converter for DC bus feeding power plants. The proposed dc-dc power converter is composed of typical voltage source fed half-bridge high frequency PWM inverter with a high frequency transformer planar link in addition to do busline side power semiconductor switching devices for PWM control scheme and parallel capacitive lossless snubbers. The operating principle of the new dc-dc converter treated here is described by using switching mode equivalent circuits, together with its unique features. All the active power switches in the half-bridge arms and do buslines can achieve ZCS turn-on and ZVS turn-off commutation transitions and consequently the total turn-off switching losses of the power switches can be significantly reduced. As a result, a high switching frequency IGBTs can be actually selected in the range of 60 kHz under the principle of soft switching. The performance evaluations of the setup are illustrated experimentally. The effectiveness of this new converter topology is proved for low voltage and large current dc-dc power supplies such as DC bus feeding from a practical point of view.

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One Stage High Frequency AC-AC Converter for Induction Heating with Power Factor Correction Function

TANIMATSU Hiroaki, HIRAKI Eiji, TANAKA Toshihiko, NAKAOKA Mutsuo, YASUI Kenji, HIROTA Izuo, IWAI Toshiaki, OMORI Hideki

電気学会半導体電力変換研究会資料 2006 ( 36 ) 47 - 52 2006.1

An Analysis of Super Capacitor Interface Bi-Directional DC-DC Converter for Electric Vehicle

ISHIGAMI Yoshinori, HIRAKA Eiji, TANAKA Toshihiko, NAKAOKA Mutsuo

電気学会半導体電力変換研究会資料 2006 ( 36 ) 29 - 34 2006.1

Feasible Analysis of Two Stage Soft Switching DC-Three Phase Inverter

SHIRAISHI Kazuhiro, HIRAKI Eiji, TANAKA Toshihiko, NAKAOKA Mutsuo

電気学会半導体電力変換研究会資料 2006 ( 36 ) 35 - 40 2006.1

ハイブリッドフィルタを用いた風力発電システムにおけるソフトスタート時の高調波電流補償法-実機モデルに対する補償効果の検討-

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

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

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

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

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

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

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

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

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

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

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

A New Control Method of Single-Phase Active Filter Using the Correlation and Cross-Correlation Coefficients : Consideration for Harmonic Voltage and Momentary Voltage Drop

UEDA Kengo, WATANABE Shuji, FUKUMA Shinji, HIRAKI Eiji, TANAKA Toshihiko

電気学会半導体電力変換研究会資料 2005 ( 99 ) 67 - 72 2005.11

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 = IEICE technical report : 信学技報 105 ( 269 ) 19 - 24 2005.9

Feasible Evaluations of PWM and PDM Dual Mode Controlled Soft Switching High-Frequency Inverter

MIURA Yuta, HIRAKI Eiji, TANAKA Toshihiko, YASUI Kenji, IWAI Toshiaki, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 105 ( 197 ) 49 - 54 2005.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

In this paper, a voltage-source type ZCS-SEPP high-frequency multi resonant inverter with a constant frequency PWM controlled active auxiliary quasi-resonant lossless sunbber, which is composed of switched capacitor and two lossless inductors in series with the main switches, is newly proposed for consumer IH cooking and processing applications. The operating principle of the proposed high frequency inverter circuit is presented and asymmetrical PWM control scheme for high-frequency effective power regulation is described here in. The effective operating characteristics of this high frequency inverter using IGBTs are illustrated and evaluated on the basis of experimental results. Finally, in order to extend soft switching operating range under low power setting condition, a pulse density modulation (PDM) based power regulation scheme is actually discussed for this consumer IH high frequency inverter.

High Frequency AC-AC Direct Converter and Its Applications

NAKAO Masahiro, HIRAKI Eiji, TANAKA Toshihiko, NAKAOKA Mutsuo, HIROTA Izuo, OMORI Hideki

Technical report of IEICE. Energy engineering in electronics and communications 105 ( 197 ) 55 - 60 2005.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

This paper presents the soft switching duty factor controlled AC-AC direct high frequency cycloconversion circuit for consumer Induction Heated cooker and steamer, which has unity power factor and sinewave line current shaping functions. The proposed utility frequency AC-high frequency AC cycloconverter as direct step-up frequency changer for converting commercial frequency AC (LFAC) into high frequency AC (HFAC) more than 20kHz can be composed of minimum circuit components for resonance components filter and diodes, which is possible to implement effective miniaturization, low cost, reliability, downsizing because of the non-electrolytic capacitor at zero voltage soft switching commutation scheme. This paper describes the operating principle and its unique features of LFAC-HFAC soft switching PWM cycloconverter circuit. Its utility AC side sinewave current quality and unity power factor correction characteristics are evaluated and discussed from an experiment point of view. Its practical effectiveness of this direct frequency changer is proven for consumer induction heated appliances in home and business usages.

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