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