Papers - HIRAKI Eiji
-
Load Observing System Based on Wave Reflection for Soft-Switching Control of MHz-Frequency Resonant Inverter Against Load Fluctuations
Aoi Oyane, Kazuhiro Umetani, Eiji Hiraki
IEEE Access 2025
-
Effectiveness Study of Streamlined Fin with Low-Pressure Loss to Improve Heat Dissipation Performance of Heat Sink
Hiroki Seto, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
INTELEC, International Telecommunications Energy Conference (Proceedings) 2024
-
Compact Hardware Implementation of Power Factor Control for LLC converter with Event-Driven-Timer Based Digital Controller
Toshiyuki Zaitsu, Yuto Yoshimura, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki, Kazuhiro Horii
Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC 2015 - 2020 2024
-
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
Masataka Ishihara, Kazuhiro Umetani, Akihiro Konishi, Eiji Hiraki
IEEE Access 12 98175 - 98188 2024
-
Parasitic Inductance Network Modeling Method for Power Module Inner Wirings Based on Inductance Matrix Measurement
Kotaro Kobashi, Kazuhiro Umetani, Masataka Ishihara, Hiroto Sakai, Yuta Okawauchi, Takuto Hayashi, Eiji Hiraki
Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC 2530 - 2536 2024
-
GaN-HEMT Power Module of Aluminum-Clad Printed Circuit Boards for Small Power Loop Inductance and High Cooling Performance
Kazuhiro Umetani, Yu Takehara, Masataka Ishihara, Eiji Hiraki
IEEE Transactions on Power Electronics 39 ( 10 ) 12047 - 12052 2024
-
Non-Isolated Interleaved High Step-Down DC-DC Converter with Reduced Switched Capacitor Stages and Automatic Current Sharing
Kazuhiro Umetani, Fumie Ishitani, Taira Shirahase, Masataka Ishihara, Eiji Hiraki
INTELEC, International Telecommunications Energy Conference (Proceedings) 2024
-
Artificial-Voice-Based Conversational Lecture Video Clips for Flipped Classroom.
Kazuhiro Umetani, Yoshitaka Toyota, Masataka Ishihara, Eiji Hiraki
ISIE 1 - 7 2023
-
Power Loop Inductance Optimization Strategy for Eliminating Turn-off Switching Surge for GaN-HEMT Switching Device
Kazuhiro Umetani, Kento Tanohara, Koki Abe, Masataka Ishihara, Eiji Hiraki
2023 25th European Conference on Power Electronics and Applications, EPE 2023 ECCE Europe 2023
-
Autonomous Resonant Frequency Tuner for a 6.78 MHz Inductive Coupling Wireless Power Transfer System to Stably Maximize Repeater Current
Akihiro Konishi, Kazuhiro Umetani, Member Masataka Ishihara, Eiji Hiraki
IEEJ Journal of Industry Applications 12 ( 2 ) 215 - 227 2023
-
Introduction of Circuit Simulator to Power Electronics Education in Interdisciplinary Educational Environment
Eiji Hiraki, Masataka Ishihara, Kazuhiro Umetani
2023 IEEE 10th International Conference on E-Learning in Industrial Electronics, ICELIE 2023 2023
-
Rectifier-Integrated Printed-Circuit-Board Winding Structure of Secondary-Side Center-Tapped Transformer for Suppressing Parasitic Resonance between Decoupling Capacitors
Hiromu Saeki, Kazuhiro Umetani, Tomohide Shirakawa, Masataka Ishihara, Eiji Hiraki
ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics 1731 - 1737 2023
-
Design of Embedded Experiments in Power Electronics Class
Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
2023 IEEE 10th International Conference on E-Learning in Industrial Electronics, ICELIE 2023 2023
-
GaN-HEMT Power Module Structure with Single-sided and Double-sided Aluminum-Clad Printed-Circuit Boards for Small Power Loop Inductance and High Cooling Performance
Kazuhiro Umetani, Yu Takehara, Masataka Ishihara, Eiji Hiraki
2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 5531 - 5537 2023
-
Origin of Common Source Inductance in Power Device Packages with Kelvin Source Terminal
Kotaro Kobashi, Akihiro Konishi, Kazuhiro Umetani, Masataka Ishihara, Takuto Hayashi, Eiji Hiraki
2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 5510 - 5516 2023
-
Suppression Strategy for Oscillatory False Triggering Between Two paralleled GaN-HEMTs Based on Optimization of Parasitic Inductance
Ryoma Yoshida, Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki
2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 5406 - 5413 2023
-
Eiji Hiraki, Masataka Ishihara, Kazuhiro Umetani
2022 IEEE 9th International Conference on e-Learning in Industrial Electronics (ICELIE) 2022.10
-
Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
2022 IEEE 9th International Conference on e-Learning in Industrial Electronics (ICELIE) 2022.10
-
Shota Kawahara, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
2022 IEEE Energy Conversion Congress and Exposition (ECCE) 2022.10
-
Masataka Ishihara, Kodai Matsuura, Akihiro Konishi, Kazuhiro Umetani, Eiji Hiraki
2022 IEEE Energy Conversion Congress and Exposition (ECCE) 2022.10