Faculty Profiles - HIRAKI Eiji

MISC - HIRAKI Eiji

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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

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

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

Minimum PWM Pulse Width Control of Soft Switching Power Conversion System.

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

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

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

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

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

A Consideration on An Auxiliary Active Resonant Commutation Snubber for Large-Capacity Power Conversion Circuits and Soft Switching PWM Inverter using Resonant Snubbers

NAKAMURA Mantarou, YAMAZAKI Takayuki, RUKONUZZAMAN Md., HIRAKI Eiji, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 101 ( 293 ) 9 - 14 2001.9

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

In this paper, for the purpose of reducing switching power losses of both power semiconductor devices and electromagnetic noises(EMI, RFI)on large-capacity power source system using voltage source type sinewave PWM inverter and PFC converter as well as bi-directional converter, a circuit topology of the auxiliary resonant commutation snubber is proposed and discussed for soft switching transition of the voltage source source pulse modulated inverter. The operation principle and characteristics of this active auxiliary snubber circuit is described, together with a practical design procedure of this unique resonant snubber. Furthermore, the computer simulation analysis of single phase full bridgs soft switching PWM inverter using the resonant bridge leg snubbers treated here, the simulation results of this inverter are evaluated as compared with hard switching inverter.

Comparative Studies on Auxiliary Active Resonant DC Link Snubber Circuit Topologies for Soft Switching Sinewave Pulse Modulated Inverters

HIROTA Yoshihiko, YOSHIDA Masanobu, RUKONUZZAMAN Md., HIRAKI Eiji, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 101 ( 293 ) 15 - 21 2001.9

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

This paper presents three proto types of auxiliary active resonant DC link snubber circuit topology for soft switching PWM inverter and their comparative considerations. In this paper, the operation principles and characteristics of their auxiliary active resonant DC link snubber circuits are described for the basic circuit features. The single phase PWM inverters with their auxiliary active resonant DC link snubber circuits treated here are evaluated with aid of computer simulation. Furthermore, by introducing power losses data of IGBTs and diodes to their simulation programs, their efficiencies are discussed and evaluated for each soft switching inverter using IGBTs.

Feasible Evaluations of 3-Phase Voltage-Fed Soft-Switching Inverter with Two Active Resonant Snubbers

Yamamoto M., Hiraki E., Nakaoka M.

Proceedings of the IEICE General Conference 2001 ( 2 ) 423 - 424 2001.3

Practical Simulator Development for Power Loss Performance Analysis of Voltage-fed Soft Switching Inverter using IGBTs.

平木英治, 山本真義, 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 ( 1-13 ) 2001

Practical design approach of a single inductor type active resonant AC link snubber for voltage-fed soft switching inverter and feasible performance evaluations Reviewed

M Yoshida, E Hiraki, M Nakaoka

IECON'01: 27TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-3 850 - 855 2001

Language：English Publisher：IEEE

This paper presents a novel type of active resonant AC link snubber circuit topology with a single quasi-resonant inductor, which is more effective in order to achieve the zero voltage soft switching of single-phase or three-phase voltage source inverter using IGBTs for CVCF/VVVF power applications and utility-interfaced dispersed power supply. In the first place, the design procedure and design example of this resonant snubber is schematically described. In the second place, the comparative feasible studies of the switching power losses analysis, the power conversion efficiency, the conductive and radiative noises for AC load side resonant snubber-assisted soft switching inverter treated here are actually carried out as compared with those data of the generic voltage source hard switching Inverter using IGBTs. The effectiveness of this resonant snubber is proved on the basis of the experimental results for voltage source soft switching inverter.

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Three phase soft switching inverter with pulse current transformer - Assisted resonant snubbers Reviewed

CY Inaba, T Yamazaki, M Yoshida, E Hiraki, Y Konishi, M Nakaoka

ISIE 2001: IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS PROCEEDINGS, VOLS I-III 1106 - 1111 2001

Language：English Publisher：IEEE

In this paper, a high frequency pulse current transformer-assisted auxiliary active resonant commutation snubber (HFTA-ARCS) for voltage source power conversion is proposed. A three phase voltage source type soft switching inverter incorporating HFTA-ARCS circuits in its three bridge legs can reduce current rating of auxiliary active power switches and simplified sensorless control scheme without specified boost current management required for soft switching. Its operating principle and digital control scheme are described and a practical design method of circuit parameters on this HFTA-ARCS circuit is also introduced on the basis of computer simulation results. Moreover, this space vector modulated soft switching inverter system with DSP-based digital control scheme is discussed on the basis of performance evaluations. The effectiveness of this inverter is proved by the simulation results and this inverter system is also compared with the conventional three-phase hard switching inverter under the conditions of specified parameters.

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Auxiliary active quasi-resonant commutation block snubber-assisted voltage source three phase soft switching PFC rectifier Reviewed

E Hiraki, M Yoshida, M Nakaoka, T Horiuchi, Y Sugawara

PESC 2001: 32ND ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-4, CONFERENCE PROCEEDINGS 1647 - 1652 2001

Language：English Publisher：IEEE

This paper presents a new active quasi-resonant snubber-assisted (Auxiliary Quasi-Resonant Commutation Block-Link; ARCB) voltage source type three phase soft switching PWM-PFC rectifier, which can operate under a principle of Zero Voltage Soft Switching (ZVS) commutation. Its operating principle and the steady-state performances of this digitally-controlled three phase soft switching PWM-PFC rectifier system with an instantaneous power feedback scheme are illustrated and evaluated on the basis of computer-aided simulation analysis.

DOI： 10.1109/PESC.2001.954355

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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