Faculty Profiles - HIRAKI Eiji

Papers - HIRAKI Eiji

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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

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

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

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

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

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

Okamoto Masayuki, Hiraki Eiji, Tanaka Toshihiko, Tanaka Atsushi

IEEJ Journal IA 2 ( 4 ) 204 - 210 2013

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

This paper proposes a universal large-capacity capacitor simulator. The proposed simulator consists of a main chemical 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 supplied 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 as 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. The 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.

DOI： 10.1541/ieejjia.2.204

CiNii Article

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Other Link： https://jlc.jst.go.jp/DN/JALC/10020770012?from=CiNii

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 2012.12

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 2012.9

A Study on Small-Sized Time-Sharing High-Frequency Resonant Soft-Switching Inverter for IH Cooking Appliances

HIROKAWA Takayuki, HIRAKI Eiji, TANAKA Toshihiko, OKAMOTO Masayuki

Technical report of IEICE. Energy engineering in electronics and communications 2012 ( 96 ) 81 - 85 2012.7

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

We have been proposed the time-sharing high-frequency resonant soft-switching inverter for IH cooking appliances which is composed of two single-IGBT multiple-resonant inverter cells. Until now, the proposed inverter has been feasibly evaluated by the experimental point of view. In this paper, possibility of the minimization of the circuit volume by coupling of two inductors is discussed from theoretical way.

A Constant DC-Capacitor Voltage Control Based Strategy for Current Balancer in Single-Phase Three-Wire Distribution Systems

BABA Yusuke, OKAMOTO Masayuki, HIRAKI Eiji, TANAKA Toshihiko, LEE Seong Ryong

IEEJ Transactions on Industry Applications 132 ( 5 ) 581 - 587 2012.5

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

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

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 2012.5

A Practical Evaluation of a Time-Sharing High-Frequency Inverter with Coupled Inductor for IH Cooking Appliances

Hirokawa Takayuki, Hiraki Eiji, Tanaka Toshihiko, Okamoto Masayuki

Journal of the Japan Institute of Power Electronics 38 141 - 148 2012

Language：Japanese Publisher：The Japan Institute of Power Electronics

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

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

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

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

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

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

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

BABA Yusuke, SUGAHARA Kazuya, OKAMOTO Masayuki, HIRAKI Eiji, TANAKA Toshihiko

IEEJ Transactions on Industry Applications 131 ( 7 ) 880 - 887 2011.7

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

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

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

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

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