Research keywords (3)：
Power Electronics
, Energy Electronics
, electrical machinery and apparatus
Research theme for competitive and other funds (9)：
2021 - 2025 Development of highly stable wireless power transfer system for implantable medical devices
2019 - 2023 SiCデバイスのスイッチング動作時に発生する誤動作メカニズムの解明
2016 - 2019 Circuit Wiring Design Method for Preventing the Oscillatory False Triggering of GaN Power Devices
2013 - 2016 Contact-less AC Power Supply System for EV/PHV in Parking Tower
2009 - 2011 An FC Generation System for Home Appliances Considering a Developing Goal of a Reformer in USA with Oversupply and Shortage Power Compensation
2009 - 2010 産業応用を目的とした高出力密度高周波誘導加熱用電源の開発
2006 - 2007 スーパーキャパシタを効果的に利用したEV用高効率回生エネルギ回収システム
2006 - 2007 A Home Use Fuel Cell Generation System with an Energy Storage Device to Suppress the Surplus and Deficit Power Caused by a Reformer
2003 - 2004 Performance development of the three-phase soft switching power conversion system for electric vehicle
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Papers (272)：
Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki. Design of Embedded Experiments in Power Electronics Class. 2023 IEEE 10th International Conference on E-Learning in Industrial Electronics, ICELIE 2023. 2023
Eiji Hiraki, Masataka Ishihara, Kazuhiro Umetani. Introduction of Circuit Simulator to Power Electronics Education in Interdisciplinary Educational Environment. 2023 IEEE 10th International Conference on E-Learning in Industrial Electronics, ICELIE 2023. 2023
Hiromu Saeki, Kazuhiro Umetani, Tomohide Shirakawa, Masataka Ishihara, Eiji Hiraki. Rectifier-Integrated Printed-Circuit-Board Winding Structure of Secondary-Side Center-Tapped Transformer for Suppressing Parasitic Resonance between Decoupling Capacitors. ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics. 2023. 1731-1737
Kazuhiro Umetani, Kento Tanohara, Koki Abe, Masataka Ishihara, Eiji Hiraki. Power Loop Inductance Optimization Strategy for Eliminating Turn-off Switching Surge for GaN-HEMT Switching Device. 2023 25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe. 2023
Akihiro Konishi, Kazuhiro Umetani, Member Masataka Ishihara, Eiji Hiraki. Autonomous Resonant Frequency Tuner for a 6.78 MHz Inductive Coupling Wireless Power Transfer System to Stably Maximize Repeater Current. IEEJ Journal of Industry Applications. 2023. 12. 2. 215-227
阿部洸希, 石原將貴, 梅谷和弘, 平木英治. Turn-off Surge Suppression Strategy Based on Parasitic Resonance Period in Replace of Power Loop Inductance Reduction. 電気学会全国大会講演論文集(CD-ROM). 2023. 2023
高力斗亜, 平木英治, 梅谷和弘, 石原將貴. Exploration of Plate Fins in Forced Air Cooled Heat Sinks with Reduced Thermal Resistance and Pressure Drops. 電気学会全国大会講演論文集(CD-ROM). 2023. 2023
1988 - 1990 Osaka University Graduate School of Engineering Science
1984 - 1988 Osaka University Faculty of ENGINEERING SCIENCE
Professional career (1)：
ph-D (Osaka University)
Work history (4)：
2013/10 - 現在 Okayama University The Graduate School of Natural Science and Technology
2006/04 - 2013/09 Yamaguchi University Graduate School of Science and Engineering
1995/12 - 2006/03 Yamaguchi University Faculty of Engineering Department of Electrical and Electronic Engineering
1990/04 - 1995/12 Mazda Motor Corporation
Association Membership(s) (4)：
Institute of Electrical and Electronics Engineers
, The Japan Institute of Power Electronics
, The Institute of Electrical Engineers of Japan
, The Institute of Electronics, Information and Communication Engineers
