Faculty Profiles - HIRAKI Eiji

Papers - HIRAKI Eiji

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A Novel Type Time-Sharing High-Frequency Resonant Soft-Switching Inverter for All Metal IH Cooking Appliances

Takayuki Hirokawa, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Mutsuo Nakaoka

IECON 2011: 37TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY 2526 - 2532 2011

Loss Evaluation of an AC-AC Direct Converter with a New GaN HEMT SPICE Model

Masayuki Okamoto, Genki Toyoda, Eiji Hiraki, Toshihiko Tanaka, Tamotsu Hashizume, Tetsu Kachi

2011 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 1795 - 1800 2011

直流電圧一定制御を用いた単相三線式配電用電流バランサの制御法

馬場雄介, 福井博一, 岡本昌幸, 平木英治, 田中俊彦

パワーエレクトロニクス学会誌 36 ( 36 ) 168 - 168 2011

非接触給電用高周波電力変換回路のシミュレーション評価

河野真吾, 岡本昌幸, 平木英治, 田中俊彦

パワーエレクトロニクス学会誌 36 ( 36 ) 187 - 187 2011

直列抵抗を模擬可能な大容量キャパシタシミュレータ

田中敦士, 岡本昌幸, 平木英治, 田中俊彦

パワーエレクトロニクス学会誌 36 ( 36 ) 190 - 190 2011

A Half-Bridge Inverter Based Current Balancer with the Reduced DC Capacitors in Single-Phase Three-Wire Distribution Feeders

Yusuke Baba, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

2011 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 4233 - 4239 2011

High Frequency link AC-AC converter for non-contact power supply system in parking tower

KAWANO Shingo, OKAMOTO Masayuki, HIRAKI Eiji, TANAKA Toshihiko

Technical report of IEICE. Energy engineering in electronics and communications 2011 ( 305(EE2011 24-30) ) 7 - 12 2011

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

In tandem with the penetration of EV, PHV, non-contact power supply system in parking towers have become important subjects. In parking towers, EV and PHV are charged on the traveling pallets, supply power is to be transmitted from the building to travelling pallets. In this paper, high frequency link AC-AC converter for non-contact power supply system in parking tower is newly proposed and its performance have been demonstrated from computer aided simulation and experiment.

Conference Report : The 36th Annual Conference of the IEEE Industrial Electronics Society (IECON2010) November 7 - 10, 2010, Glendale, USA

IEEJ Transactions on Industry Applications 131 ( 3 ) NL3_4 2011

A feasible evaluation of a charge boost type two output full bride inverter for IH cooking appliance

Zenitani Shin, Okamoto Masayuki, Hiraki Eiji, Tanaka Toshihiko, Sadakata Hideki, Fujita Atsushi, Nakaoka Mutuo

Journal of the Japan Institute of Power Electronics 36 ( 36 ) 103 - 109 2011

Language：Japanese Publisher：The Japan Institute of Power Electronics

In this paper, a multi output high frequency soft switching inverter topology is presented for home use IH cooking appliances. The proposed inverter system is comprised of simple power circuitry and unique control scheme. The detailed analysis shows that the proposed inverter has low harmonic distortion, low switching losses and wide output powerrange. A detailed PWM procedure is illustrated as well. Through simulation and experimental results, the proposed IH system is verified.

DOI： 10.5416/jipe.36.103

電気自動車用スマートチャージャ

田中秀典, 関谷司, 岡本昌幸, 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) 62nd 2011

マルチレベルインバータを用いた無効電力補償装置

伊藤北斗, 岡本昌幸, 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) 62nd 2011

高周波ソフトスイッチングハーフブリッジインバータにおける寄生インダクタンスを考慮した動作解析

松井光生, 岡本昌幸, 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) 62nd 2011

高い降圧比を有するインダクタ結合形DC-DCコンバータの損失分析

渡辺潤, 岡本昌幸, 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) 62nd 2011

A half-bridge inverter based active power quality compensator with a DC voltage balancer for electrified railways

Tint Soe Win, Yusuke Baba, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

Proceedings of the International Conference on Power Electronics and Drive Systems 185 - 190 2011

Control strategies of active power line conditioners in single-phase circuits

Toshihiko Tanaka, Masayuki Okamoto, Eiji Hiraki

8th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2011-ECCE Asia 1813 - 1820 2011

An isolated bi-directional soft switching DC-DC converter for energy storage system and its voltage stress suppression approach

Kazumasa Hirao, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka

Proceedings of the International Conference on Power Electronics and Drive Systems 555 - 560 2011

A ubiquitous power with DC micro-grid for sctional compact emergency shelters

Keiichi Kato, Masayuki Okamoto, Eiji Hiraki, Toshihiko Tanaka, Makoto Koganei, Fusanori Miura

Proceedings of the International Conference on Power Electronics and Drive Systems 436 - 440 2011

A New Control Method of a Large-Capacity Capacitor Simulator with an Inner Series Resistor

TANAKA Atsushi, HIRAKI Eiji, TANAKA Toshihiko

IEEJ Transactions on Industry Applications 130 ( 10 ) 1189 - 1190 2010.10

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

This paper proposes a new control method for the previously proposed large-capacity capacitor simulator, which can perform an inner series resistor of the EDLCs. In the proposed large-capacity capacitor simulator, one of three legs performs a bi-directional dc-dc converter. The others are used for a single-phase PWM rectifier. In the charging operation of the proposed large-capacity simulator, one-leg is used as a boost converter. Most power, which is stored in the proposed simulator, is injected to the utility through the PWM rectifier. In the discharging operation, the one-leg performs a buck converter. Most power, which is supplied to the load, is from the utility through the PWM rectifier. Thus the proposed simulator performs a large-capacity capacitor with an inner resistor in both charging and discharging operations. The basic principle of the proposed simulator is discussed in detail. The validity and excellent practicability of the proposed control method for the large-capacity capacitor simulator are confirmed using PSIM software.

DOI： 10.1541/ieejias.130.1189

Basic analysis of an isolated bi-directional DC-DC converter

HIRAO Kazumasa, OKAMOTO Masayuki, HIRAKI Eiji, TANAKA Toshihiko

IEICE technical report 110 ( 151 ) 23 - 28 2010.7

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

FUKUI Hirokazu, HIRAKI Eiji, TANAKA Toshihiko

IEEJ Transactions on Industry Applications 130 ( 7 ) 935 - 936 2010.7

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

This paper deals with applying the constant dc voltage control based algorithm to the current balancer in single-phase three-wire secondary distribution systems. The power flows into a three-leg inverter, which performs the current balancer, are discussed, and then we show that only the reactive power flows into the three-leg inverter. This demonstrates that the required-capacity of the dc capacitor can be reduced as compared to that of the active power quality compensator used in the electrified railways. This reduced-capacity dc capacitor results in the rapid and stable balancing. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. Digital computer simulation results demonstrate that the balanced source currents with unity power factor are obtained remaining the unbalanced load currents conditions.

DOI： 10.1541/ieejias.130.935

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