Faculty Profiles - HIRAKI Eiji

MISC - HIRAKI Eiji

Division display 221 - 240 of about 341 ／ All the affair displays >>

A Novel Type Active Resonant Snubber-Assisted Soft Switching PWM DC-DC Power Converter with High Frequency Transformer Link

ISHIGAMI Yoshinori, HIRAKI Eiji, AHMED Nabil A, LEE Hyun Woo, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 104 ( 651 ) 7 - 11 2005.2

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

In recent years, in several kW class, soft switching PWM DC-DC converter with a high frequency transformer link, which include a variety of active auxiliary resonant snubbers has been attracted special interest. The high efficiency, high power density and high performance due to the developments of high frequency soft switching commutation becomes realizable for practical applications. The miniaturization, lighter weight and high efficiency of the DC-DC power converters can be advanced. In this paper, the proposed high frequency isolated phase shift PWM DC-DC power converter with auxiliary resonant DC link snubbers, which is suitable for arc welding equipment, is presented and discussed. The operating principle of new DC-DC power converter with optimum gate pulse pattern is described, along with its unique features. The operating characteristics of DC-DC converter treated here is illustrated and discussed as compared with previously-proposed soft switching DC-DC power converter with a high frequency link. Its practical effectiveness is proved on the basis of the simulation results.

Current-Fed E Class High Frequency Soft Switching PDM Inverter for Driving Dielectric Barrier Discharge Fluorescent Lamp

MATSUDA Mikiya, HIRAKI Eiji, AHMED Nabil A., LEE Hyun Woo, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 104 ( 651 ) 21 - 25 2005.2

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

In recent years, the environmental recycling movement of the mercury-less comes out from the practical viewpoint of influence to the human body and environmental preservation. This paper presents a cost effective PDM (Pulse Density Modulation) controlled current source type high frequency edge resonant high frequency inverter using a single power semiconductor switch for driving and dimming the dielectric barrier discharge based mercury-less rare gas fluorescent lamp. The current source-fed class E edge resonant soft switching inverter treated here are evaluated on the basis of the simulation results and experimental ones and discussed for operating characteristics of the rare gas (Xe) barrier discharge fluorescent lamp from an application point of view. Furthermore, the experimental performances are comparatively evaluated from the viewpoints of performance evaluations in these resonant inverters, are discussed as compared with the royer type high frequency inverter and current source-fed class E edge resonant soft switching inverter.

Utility Frequency AC to High Frequency AC Direct Converter with Soft Switching Commutation Approach

NAKAO Masahiro, SUGIMURA Hisayuki, HIRAKI Eiji, AHMED Nabil A., LEE Hyun Woo, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 104 ( 651 ) 27 - 32 2005.2

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

This paper presents the soft switching duty factor controlled AC-AC direct high frequency cycloconversion circuit for consumer Induction Heated cooker and steamer, which has unity power factor and sinewave line current shaping functions. The proposed utility frequency AC-high frequency AC cycloconverter as direct step-up frequency changer for converting commercial frequency AC (LFAC) into high frequency AC (HFAC) more than 20kHz can be composed of minimum circuit components for resonance, filter and diodes, which is possible to implement effective miniaturization, low cost, reliability, high efficiency, downsizing because of the non-electrolytic capacitor at zero voltage soft switching commutation scheme. This paper describes the operating principle and its unique features of LFAC-HFAC soft switching PWM cycloconverter circuit. Its utility AC side sinewave current quality and unity power factor correction characteristics are evaluated and discussed from an experiment point of view. Its practical effectiveness of this direct frequency changer is proven for consumer induction heated appliances in home and business usages.

Phase shifted PWM DC-DC Converter with active auxiliary Resonant snubber

NISHIDA Tomomasa, HIRAKI Eiji, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 104 ( 650 ) 31 - 35 2005.2

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

The full bridge inverter circuit can operates under soft switching by the phase shifted PWM control method. However, this conventional soft switching full bridge DC-DC converter cannot achieve the soft switching in all power range. Then, this paper presents a new circuit topology of high frequency link DC-DC converter with active auxiliary snubber. This proposed active auxiliary resonant snubber make wider soft switching range compared with simplest soft switching Full Bridge DC-DC converter. In this paper, We clarify the operation of the active auxiliary snubber and the comparative experimental result.

A Novel Single-Phase Sinewave Inverter Controlled by Time-Sharing Sinewave Absolute Modulated Soft Switching PWM Boost Chopper

OGURA Koki, SHIRAISHI Kazuhiro, HIRAKI Eiji, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 104 ( 650 ) 7 - 13 2005.2

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

This paper presents a novel prototype circuit topology of a high efficiency single-phase sinewave inverter, which is composed of time-sharing sinewave absolute modulated boost chopper in the first power processing stage and time-sharing sinewave modulated full-bridge inverter in the second power processing stage operated by time-sharing dual mode control scheme. Its unique operating principle of two power processing stage with time-sharing dual mode sinewave modulation scheme is described in addition to a design example. Finally, this paper proposes a soft switching boost chopper with a single passive auxiliary edge-resonant snubber. The new conceptual operating principle of this novel sinewave inverter related to new energy generation system is presented and discussed by using the experimental results.

Advanced High Power DC-DC Converter using A Novel Voltage Source Full-Bridge Soft-Switching PWM Inverter with High Frequency Transformer Link for Utility AC400Vrms Input

MORIMOTO Keiki, DOI Toshimitsu, MANABE Haruhiko, HIRAKI Eiji, LEE Hyun Woo, NAKAOKA Mutsuo, AHMED Tarek

電気学会半導体電力変換研究会資料 2005 ( 9 ) 1 - 7 2005.1

アクティブ補助共振スナバ方式ソフトスイッチングPWMインバータの太陽光発電システムへの応用

白石和洋, 小倉弘毅, 中村万太郎, 平木英治

電気学会全国大会講演論文集 2005 ( 4 ) 2005

補助共振スイッチ付高周波トランスリンクソフトスイッチングPWM DC-DCコンバータの特性評価

衛藤哲弥, 石上宜範, 平木英治, 中岡睦雄, 土井敏光, 真鍋陽彦, 森本慶樹

電気学会全国大会講演論文集 2005 ( 4 ) 2005

IHクッキングヒータ用PWM/PDM複合制御型ソフトスイッチング高周波インバータ

三浦祐太, 谷松弘章, 平木英治

電気学会全国大会講演論文集 2005 ( 4 ) 2005

簡易制御型アクティブ共振DCリンクスナバを持つ三相電圧形ソフトスイッチングインバータ

藤井勇馬, 白石和洋, 中村万太郎, 平木英治

電気学会全国大会講演論文集 2005 ( 4 ) 2005

希ガス蛍光ランプ調光用高周波インバータの性能評価

藤田堅太郎, 松田樹也, 平木英治

電気学会全国大会講演論文集 2005 ( 4 ) 2005

Newly-Proposed hybrid Resonant Commutation Bridge Led Link Snubber Assisted Three-Phase ZVZCS-PWM Soft-Switching Inverter

平木英治

Journal of Power Electronics Vol.5,No.1 29 - 35 2005

An Active Auxiliary Quasi-Resonant Commutation BlockSnubber-Assisted Three Phase Voltage Source Soft Switching PFC Rectifier using IGBTs

平木英治

JOURNAL OF POWER ELECTRONICS Vol.5,No.1 29 - 35 2005

Power Loss Estimation Analysis Based on Experimental Power Switching Device Data for Three-Phase ARCP Assisted Soft Switching Inverter

HIRAKI Eiji, HIROTA Yoshihiko, NAKAOKA Mutsuo, HORIUCHI Toshikazu, SUGAWARA Yoshitaka

IEICE TRAS. COMMUN 87 ( 5 ) 1366 - 1372 2004.5

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

This paper deals with a simple and practical power loss analysis simulator, which can actually estimate the total power losses of three phase voltage-fed Auxiliary resonant commutation pole snubber assisted soft switching inverter as well as hard-switching inverter. In order to estimate the switching power losses and conduction power losses of switching semiconductor power devices (IGBTs), which are incorporated into the inverters, the proposed practical simulator is making use of feasible switching power loss data tables and conduction power loss data tables, which are accumulated from the measured voltage and current operating wave forms of power semiconductor switching devices. The practical effectiveness of feasible simulation technique and power loss evaluations for power electronic conversion circuits and systems are confirmed by the simulation and experimental results basis under the conditions of soft switching and hard switching sinusoidal PWM schemes.

CiNii Article

CiNii Books

researchmap

Auxiliary Resonant Leg Link Snubber-Assisted Single-Phase Soft-Switching Inverter

FUJII Yuma, IMAMURA Kosuke, NAKAMURA Mantaro, HIRAKI Eiji, NAKAOKA Mutsuo

Technical report of IEICE. Energy engineering in electronics and communications 103 ( 653 ) 5 - 8 2004.2

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

This paper presents the voltage source inverter with auxiliary resonant leg link snubber. The proposed ARLL snubber is a kind of soft-switching principle for voltage-fed inverter. In this paper, designing method of control timing and circuit parameter is described on the ARLL snubber. Through several experiments, circuit operation and efficiency were confirmed and the validity of this circuit is verified by experimental results.

Bridge Type Resonant AC Link Snubber-Assisted Three-Phase Voltage Source Sinewave Soft-Switching PWM Inverter and Its Performance Evaluations

IYOMORI Hisashi, NAGAI Shin-ichiro, YOSHIDA Masanobu, HIRAKI Eiji, NAKAOKA Mutsuo

電気学会半導体電力変換研究会資料 2004 ( 47 ) 7 - 11 2004.1

AC Load Voltage Regulator with Static VAR Compensator for Three-Phase Self-Excited Induction Generator

TAREK Ahmed, NORO Osamu, SOSHIN Koji, SRAWOUTH Chandhaket, HIRAKI Eiji, NAKAOKA Mutsuo

2004 ( 1 ) 19 - 24 2004.1

高周波パルス変調ソフトスイッチングインバータの現状と技術動向

平木英治, 長井真一郎

電気学会全国大会講演論文集 2004 ( 4 ) 2004

新ゲートパルスパターンによるアクティブ補助共振スナバ方式ソフトスイッチングPWMインバータとその応用

白石和洋, 小倉弘穀, 中村万太郎, 藤井勇馬, 平木英治, 中岡睦雄, LEE H W

電気学会産業応用部門大会講演論文集 2004 ( 1 ) 2004

Terminal Voltage Regulation Implementation of Three-Phase Self-Excited Induction Generator Using Static VAR Compensator

AHMED Tarek, HIRAKI Eiji, NAKAOKA Mutsuo

21 285 - 288 2003.8

　 PREV - NEXT 　

< HIRAKI Eiji >

MISC - HIRAKI Eiji