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 (304)：
Toshiyuki Zaitsu, Yuto Yoshimura, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki, Kazuhiro Horii. Compact Hardware Implementation of Power Factor Control for LLC converter with Event-Driven-Timer Based Digital Controller. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC. 2024. 2015-2020
Kotaro Kobashi, Kazuhiro Umetani, Masataka Ishihara, Hiroto Sakai, Yuta Okawauchi, Takuto Hayashi, Eiji Hiraki. Parasitic Inductance Network Modeling Method for Power Module Inner Wirings Based on Inductance Matrix Measurement. Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC. 2024. 2530-2536
Masataka Ishihara, Kazuhiro Umetani, Akihiro Konishi, Eiji Hiraki. Feasibility of Active Reactance Compensator for Autonomously Maximizing Repeater Coil Current of Wireless Power Transfer System Against Variations in Resonant Frequency and Magnetic Coupling Intensity. IEEE Access. 2024. 12. 98175-98188
Kazuhiro Umetani, Yu Takehara, Masataka Ishihara, Eiji Hiraki. GaN-HEMT Power Module of Aluminum-Clad Printed Circuit Boards for Small Power Loop Inductance and High Cooling Performance. IEEE Transactions on Power Electronics. 2024. 39. 10. 12047-12052
Hiroki Seto, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki. Effectiveness Study of Streamlined Fin with Low-Pressure Loss to Improve Heat Dissipation Performance of Heat Sink. INTELEC, International Telecommunications Energy Conference (Proceedings). 2024
西尾颯真, 石原將貴, 梅谷和弘, 平木英治. Feasibility Study on Fixed-Time Compensation of Control Signal Propagation Delay for Automatic Tuning Assist Circuit in 6.78MHz Wireless Power Transfer System. 電気学会研究会資料(Web). 2024. SPC-24-001-017/MD-24-001-017
石谷文絵, 石原將貴, 梅谷和弘, 平木英治. Two-Phase Interleaved Non-isolated High Step-down Converter with Automatic Current Sharing. 電気学会研究会資料(Web). 2024. SPC-24-044-050.052-054/MD-24-044-050.052-054
吉村勇人, 財津俊行, 梅谷和弘, 石原將貴, 平木英治, 堀井一宏. Miniaturization of Power Factor Control Circuit for LLC Converter Using Event-Driven Digital Controller. 電気学会研究会資料(Web). 2024. HCA-24-010-017
石原將貴, 吉田崚真, 梅谷和弘, 平木英治. Design Guideline of Parasitic Inductance for Preventing Oscillatory False Triggering of Two Paralleled GaN-HEMTs Caused by Parallel Oscillation between GaN-HEMTs. 電気学会産業応用部門大会(CD-ROM). 2023. 2023
小橋孝太郎, 小西晃央, 梅谷和弘, 石原將貴, 林拓翔, 平木英治. Elucidation of the mechanism of the common source inductance of power devices with the kelvin source terminal. 電気学会産業応用部門大会(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
