Faculty Profiles - HIRAKI Eiji

Papers - HIRAKI Eiji

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A Constant DC Voltage Control Based Strategy for an Active Power Quality Compensator Used in Electrified Railways with Improved Response

N. Ishikura, E. Hiraki, T. Tanaka

IECON: 2009 35TH ANNUAL CONFERENCE OF IEEE INDUSTRIAL ELECTRONICS, VOLS 1-6 3023 - 3028 2009

Stand-alone photovoltaic generation system with combined storage system using EDLC

Hiroaki Nakayama, Eiji Hiraki, Toshihiko Tanaka, Noriaki Koda, Nobuo Takahashi, Shuji Noda

IECON Proceedings (Industrial Electronics Conference) 883 - 888 2009

A Large-Capacity Capacitor Simulator with a PWM Rectifier and Bi-directional DC-to-DC Converter

A. Tanaka, E. Hiraki, T. Tanaka

2009 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1 AND 2 1318 - 1323 2009

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 2008.4

A Constant DC Voltage Control Based Method of the Active Power Quality Compensator for Electrified Railways

TANAKA Toshihiko, ISHIKURA Norio, FUKUI Hirokazu, HIRAKI Eiji

IEEJ Transactions on Industry Applications 128 ( 2 ) 145 - 146 2008.2

Language：Japanese Publisher：The Institute of Electrical Engineers of Japan

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

A New Control Method of Current Balancer for Single-Phase Three-Wire Secondary Distribution Systems Using the Correlation and Cross-Correlation Coefficients

FUKUI Hirokazu, HIRAKI Eiji, TANAKA Toshihiko, FUKUMA Shinji

IEEJ Transactions on Industry Applications 128 ( 1 ) 34 - 40 2008.1

Language：Japanese Publisher：The Institute of Electrical Engineers of Japan

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

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

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

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

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

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

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

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

Soft-Switching PWM-SEPP High-Frequency Inverter with Single ZCS Cell for IH Cooking Heater

Miura Yuta, Atsushi Fujita, Omori Hideki, Hiraki Eiji, Nakaoka Mutsuo

Journal of the Japan Institute of Power Electronics 34 103 - 110 2008

Publisher：The Japan Institute of Power Electronics

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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13^th International Power Electronics and Motion Control Conference

Hiraki Eiji

Journal of the Japan Institute of Power Electronics 34 226 - 226 2008

A stand-alone photovoltaic generation system with soft-switching converters

Nakayama Hiroaki, Hraki Eiji, Tanaka Toshihiko, Koda Noriaki, Takahashi Nobuo, Noda Shuji

Journal of the Japan Institute of Power Electronics 34 143 - 150 2008

Language：Japanese Publisher：The Japan Institute of Power Electronics

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

A Novel Simple Control Method of an Active Power Quality Compensator Used in Electrified Railways with Constant DC Voltage Control

T. Tanaka, N. Ishikura, E. Hiraki

IECON 2008: 34TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-5, PROCEEDINGS 451 - 456 2008

A novel half-bridge asymmetrical ZCS-PWM DC-DC converter with high frequency-link

Tomokazu Mishima, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

IEEJ Transactions on Industry Applications 128 ( 4 ) 5 - 395 2008

High-frequency link symmetrical active edge resonant snubbers-assisted ZCS-PWM DC-DC converter

T. Mishima, E. Hiraki, T. Tanaka, M. Nakaoka

IET ELECTRIC POWER APPLICATIONS 1 ( 6 ) 907 - 914 2007.11

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 2007.10

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