Papers - HIRAKI Eiji
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Analytical Derivation of Phase-Current Waveform for Elimination of Torque and Input-Current Ripples of Switched Reluctance Motor Operating Under Magnetic Saturation
Takayuki Kusumi, Kosuke Kobayashi, Kazuhiro Umetani, Eiji Hiraki
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 58 ( 4 ) 5248 - 5261 2022.7
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High-Efficiency Solenoid Coil Structure for Induction Heating of Cylindrical Heating Object
Daiki Miyake, Kazuhiro Umetani, Shota Kawahara, Masataka Ishihara, Eiji Hiraki
IEEE International Symposium on Industrial Electronics 2022-June 307 - 313 2022
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Secondary-Side Resonating LLC Converter for Reducing Transformer Voltage in High Power Applications
Hayato Nakamura, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia 547 - 554 2022
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Phase-Shift Based on Power Factor Control for LLC Converter with High Output Stability Against Load Fluctuation
Kenta Yamada, Kazuhiro Umetani, Eiji Hiraki, Masataka Ishihara
2022 IEEE 7th Southern Power Electronics Conference, SPEC 2022 2022
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A Secondary-Side Resonant LLC converter for Reducing Resonance Voltage with Boost Mode Operation Using Resonance Including Current Doubler Rectifier
Hayato Nakamura, Naoyuki Yokoshima, Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki, Tatsuya Miyazaki, Yuta Okawauchi, Ken Nakahara
2022 IEEE 7th Southern Power Electronics Conference, SPEC 2022 2022
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Sinusoidal-Flux Reluctance Machine Driven with Three-Phase Inverter for Improving Power Density with Reduced Torque and Input Current Ripples
Masaki Iida, Kazuhiro Umetani, Takayuki Kusumi, Masataka Ishihara, Eiji Hiraki
2021 23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe 2021.9
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Autonomous System Concept of Multiple-Receiver Inductive Coupling Wireless Power Transfer for Output Power Stabilization against Cross-Interference among Receivers and Resonance Frequency Tolerance
Masataka Ishihara, Keita Fujiki, Kazuhiro Umetani, Eiiji Hiraki
IEEE Transactions on Industry Applications 57 ( 4 ) 3898 - 3910 2021.7
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Analytical Formulation of Copper Loss of Litz Wire With Multiple Levels of Twisting Using Measurable Parameters
Kazuhiro Umetani, Shota Kawahara, Jesus Acero, Hector Sarnago, Oscar Lucia, Eiji Hiraki
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 57 ( 3 ) 2407 - 2420 2021.5
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Industrial Electronics Education: Past, Present, and Future Perspectives
Oscar Lucia, Joao Martins, Yousef Ibrahim, Kazuhiro Umetani, Luis Gomes, Eiji Hiraki, Houcine Zeroug, Milos Manic
IEEE INDUSTRIAL ELECTRONICS MAGAZINE 15 ( 1 ) 140 - 154 2021.3
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Feasibility of Sinusoidal Flux Drive Design of Reluctance Motor for Reducing Torque and Input Current Ripples with Three-Leg Inverter
Masaki Iida, Takayuki Kusumi, Kazuhiro Umetani, Eiji Hiraki
2021 IEEE 19TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (PEMC) 439 - 446 2021
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Yusuke Hatakenaka, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki, Hiroshi Tadano
IECON 2021 - 47th Annual Conference of the IEEE Industrial Electronics Society(IECON) 1 - 8 2021
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Tiny Approaches to the Interactive Online Lectures Under the COVID-19 Pandemic.
Eiji Hiraki, Masataka Ishihara, Kazuhiro Umetani
IECON 2021 - 47th Annual Conference of the IEEE Industrial Electronics Society(IECON) 1 - 4 2021
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Koki Abe, Masataka Ishihara, Yusuke Hatakenaka, Kazuhiro Umetani, Eiji Hiraki
30th IEEE International Symposium on Industrial Electronics(ISIE) 1 - 5 2021
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A Control Method Based on Power Factor for Improving Output Voltage Stability and Efficiency of LLC Converter in Wide Range of Output Voltage and Load Impedance
Kazuhiro Umetani, Kota Shimomura, Kenta Yamada, Taichi Kawakami, Masataka Ishihara, Eiji Hiraki
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 3436 - 3443 2021
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Multiple-Transmitter with Phase-Shift and Dynamic ZVS Angle Controls at Fixed Operating Frequency for Cross-Interference Free Wireless Power Transfer Systems
Kodai Matsuura, Masataka Ishihara, Akihiro Konishi, Kazuhiro Umetani, Eiji Hiraki
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) 5767 - 5774 2021
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Autonomous Resonant Frequency Tuning Controller for Repeater Resonator in Resonant Inductive Coupling Wireless Power Transfer System
Akihiro Konishi, Kazuhiro Umetani, Masataka Ishihara, Eiji Hiraki
PROCEEDINGS OF 2021 IEEE 30TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE) 2021
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AC resistance Prediction of Litz Wire Planer Spiral Coil Based on Litz wire Loss Model
S. Kawahara, K. Umetani, E. Hiraki
23rd International Conference on Electrical Machines and Systems, ICEMS 2020 1541 - 1546 2020.11
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Phase-current waveform for switched reluctance motors to eliminate input-current ripple and torque ripple in low-power propulsion below magnetic saturation
Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki
IET POWER ELECTRONICS 13 ( 15 ) 3351 - 3359 2020.11
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Simultaneous Tuning of Rotor Shape and Phase Current of Switched Reluctance Motors for Eliminating Input Current and Torque Ripples With Reduced Copper Loss
Takayuki Kusumi, Takuto Hara, Kazuhiro Umetani, Eiji Hiraki
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 56 ( 6 ) 6384 - 6398 2020.11
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Strategy of Topology Selection Based on Quasi-Duality Between Series-Series and Series-Parallel Topologies of Resonant Inductive Coupling Wireless Power Transfer Systems
Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki
IEEE TRANSACTIONS ON POWER ELECTRONICS 35 ( 7 ) 6785 - 6798 2020.7