Faculty Profiles - HIRAKI Eiji

Papers - HIRAKI Eiji

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Utility-interactive three-phase soft-switching pulse width modulated converter with active resonant snubbers in bridge leg sides for energy storage devices

Hisaaki Yamamoto, Eiji Hiraki, Yoshihiro Konishi, Katsumi Nishida, Toshikazu Horiuchi, Yoshitaka Sugawara, Mutsuo Nakaoka

IECON Proceedings (Industrial Electronics Conference) 2 897 - 902 1999

Digitally-controlled three phase soft-switching PFC converter with instantaneous power feedback control scheme

M. Yamamoto, H. Hattori, E. Hiraki, M. Nakaoka

PEDES 1998 - 1998 International Conference on Power Electronic Drives and Energy Systems for Industrial Growth 2 1002 - 1006 1998

Object-oriented simulation of DSP controlled three phase active PFC converter

S. M. Ulhaq, E. Hiraki, M. Nakaoka, H. Takano

IEE Conference Publication ( 456 ) 28 - 33 1998

Three phase voltage-fed space vector modulated soft-switching PFC rectifier with instantaneous power feedback scheme

M. Yamamoto, S. Hattori, E. Hiraki, M. Nakaoka, T. Horiuchi, Y. Sugawara

IEE Conference Publication ( 456 ) 92 - 98 1998

IV. Feasible Applications of Resonant Power Conversion Circuit Systems

NAKAOKA Mutsuo, HIRAKI Eiji

IEEJ Transactions on Industry Applications 117 ( 2 ) 129 - 132 1997.2

High-Frequency Switched Resonant Mode Power Conversion Technologies. Feasible Applications of Resonant Power Conversion Circuit Systems.

中岡睦雄, 平木英治

電気学会論文誌 D 117 ( 2 ) 1997

The State-of-The Art Soft-Switching Power Conversion Technology.

中岡睦雄, 平木英治

電気学会全国大会講演論文集 1997 ( 4 ) 1997

New phase-shifted soft-switching PWM series resonant inverter topologies and their practical evaluations

Satoshi Nagai, Eiji Hiraki, Yasuhiro Arai, Mutsuo Nakaoka

Proceedings of the International Conference on Power Electronics and Drive Systems 1 318 - 322 1997

Control implementation Induction Machines System for Supplying the Desired Mechanical Power from Solar Photovoltaic Array

Izumi Teruyuki, Tamura Keizoh, Hiraki Eiji, Nakaoka Mutsuo

Journal of the Japan Institute of Power Electronics 21 ( 1 ) 91 - 100 1995

Publisher：The Japan Institute of Power Electronics

Solar energy is more attractive and acceptable as one of available power sources in future from a view point of a clean and inexhaustible power supply. However, the electric power generated from a solar photovoltaic array largely depends on weather conditions. Therefore a constant mechanical power can not be obtained from one motor which is driven on the basis of the electric power from a solar photovoltaic array. In order to produce a stable mechanical power, the authors propose the parallel operation system using two induction machines.<br>This paper presents on the stability of the proposed system in which the machine A is related to a solar phtovoltaic array coupled with a general purpose inverter and another machine B is interconnected directly to the utility-grid AC line. It is shown that the system can generate a stable mechanical power with cooperation of the machine B even if the output power of the machine A becomes zero. Furthermore the operating frequency of the inverter is determined by utilizing the relation of the maximum power and the optimal operating voltage of a solar photovoltaic array. As a result, the output power of the machine A becomes always a maximum value under variable weather conditions.

DOI： 10.14913/jipe1995.21.91

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Optimal control of a servo system regenerating conservative energy to a condenser

Teruyuki Izumi, Prasanna Boyagoda, Mutsuo Nakaoka, Eiji Hiraki

International IEEE/IAS Conference on Industrial Automation and Control: Emerging Technologies, Proceedings 651 - 656 1995

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