Papers - MATSUMORI Hiroaki
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Comparative Study on Insulation Lifetime of Stator Winding of Dual Inverter Fed Open Winding IPMSM and Single Inverter Fed Star-Connected IPMSM for EV Application Reviewed International coauthorship International journal
Hayakawa, Teppei and Maeda, Yuto and Matsumori, Hiroaki and Kosaka, Takashi and Matsui, Nobuyuki and Miyoshi, Yoichi and Koga, Kiyotaka and Saha, Subrata
IEEE Transactions on Industry Applications 60 ( 5 ) 6886 - 6898 2024.06
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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New Experimental System and Procedure for On-Line Insulation Life Testing of Stator Winding of Automotive Traction PMSM Without Using Dynamo System Reviewed International coauthorship International journal
Hayakawa, Teppei and Maeda, Yuto and Matsumori, Hiroaki and Kosaka, Takashi and Matsui, Nobuyuki and Miyoshi, Yoichi and Koga, Kiyotaka and Saha, Subrata
IEEE Transactions on Industry Applications 60 ( 5 ) 6684 - 6693 2024.05
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Alternative PWM Switching Strategy Implementation for a Dual Inverter Fed Open Winding Motor Drive System for an Electric Vehicle Application International journal
Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui and Subrata Saha
IEEE Transactions on Industry Applications 59 ( 5 ) 5957 - 5970 2023.09
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
The dual inverter fed open winding interior permanent magnet synchronous motor (DIF-OW-IPMSM) is a promising traction drive system configuration for a high power and high efficiency electric vehicle. In this article, for an electric vehicle application, an alternative PWM switching strategy of the DIF-OW-IPMSM is presented when the motor is operating in the medium and high speed regions. The alternative PWM switching strategy consists of operating one of the inverters in the low switching frequency synchronous 1 pulse (1P) mode and the other inverter in the high switching frequency asynchronous specialized continuous pulse width modulation (SCPWM) or discontinuous pulse width modulation (SDPWM). Preliminarily, the alternative PWM switching strategy has been verified from suitable simulation and experimental results with a dual Si-IGBT based inverter. Finally, a dual inverter configuration with a hybrid combination of Si-IGBT inverter and SiC-MOSFET inverter is recommended for a premium class electric vehicle to further improve the drive system efficiency. Suitable experimental results and relevant logical arguments are given for the dual inverter based on Si-IGBT and SiC-MOSFET to support the concept.
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Inverter Power Device Fault Detection and Fail Safe Action Strategy for Electric Vehicle With a Dual Inverter Fed Open Winding Motor International journal
Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui and Subrata Saha
IEEE Transactions on Industry Applications 59 ( 3 ) 3875 - 3888 2023.05
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE
A electric vehicle (EV) needs high drive system efficiency, low motor noise and limp-home capability of the traction drive when there is a component failure. A dual inverter fed open winding interior permanent magnet synchronous motor (DIF-OW-IPMSM) drive system satisfied all the above needs. In this paper, new algorithms for the inverter power device fault detection and fail-safe action strategy for the DIF-OW-IPMSM drive system in the entire speed region of the EV are proposed to prove its high reliability. The new algorithms for the inverter power device fault detection are derived from the sensed three phase fault currents and their subsequent analytical and logical processing within the micro-computer. The fail-safe action strategy is derived such that the unbalanced three phase fault currents using the dual inverters are quickly restored to balanced three phase currents using a single inverter and hence, theeffect of the vibration of the traction motor due to undesired torque ripple during inverter device fault condition is kept minimum. The proposed new algorithms are verified by suitable simulation and experimental results, and the safe limp-home capability of the DIF-OW-IPMSM drive system is demonstrated.
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Issues and Solutions for a GaN Based Modified Non-Isolated Integrated On-Board Charger Configuration Using Traction Motor Reviewed International coauthorship International journal
Kazuki Toda, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui, Keisuke Nakamura, Keisuke Ushida, Yutaka Hotta and Saha Subrata
2024 IEEE Energy Conversion Conference & EXPO(ECCE) 2548 - 2552 2024.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
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Proper magnetic materials selection method for AC filter inductor design used in single phase PWM inverters Reviewed International journal
Taisei Yamaguchi, and Hiroaki Matsumori
AIP Advances 14 ( 015132 (2024) ) 015132-1 - 015132-6 2024.01
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.1063/9.0000740
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DC inductor loss measurement used in DC/DC converters under high DC current conditions Reviewed International journal
Huu Thien Le, Hiroaki Matsumori, Koushi Takano and Keiji Wada
2023 IEEE Energy Conversion Conference & EXPO(ECCE) 2023.10
Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
This paper proposes an experimental procedure using a new experimental system for on-line insulation turn-to-turn life testing of a stator winding without a rotor of permanent magnet synchronous motor. Without using any expensive large capacity dynamo set-up, the system and procedure make it possible to test the insulation life of the stator winding under steady state operation of the motor even though at high temperatures more than
200 degrees Celsius. The line-to-line surge voltage applied to the motor under inverter's PWM control at running state of the motor can be identically replicated by the proposed static system. Suitable control blocks are given to describe the experimental procedure for an automotive traction application. -
GaN Based Modified Integrated On-Board Charger Configuration Using Minimum Additional Active and Passive Components Reviewed International journal
Shohei Funatsu, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui, Keisuke Nakamura, Mitsuru Takahashi, Shin Taguchi and Saha Subrata
2023 IEEE Energy Conversion Conference & EXPO(ECCE) 2023.10
Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
This paper proposes an experimental procedure using a new experimental system for on-line insulation turn-to-turn life testing of a stator winding without a rotor of permanent magnet synchronous motor. Without using any expensive large capacity dynamo set-up, the system and procedure make it possible to test the insulation life of the stator winding under steady state operation of the motor even though at high temperatures more than
200 degrees Celsius. The line-to-line surge voltage applied to the motor under inverter's PWM control at running state of the motor can be identically replicated by the proposed static system. Suitable control blocks are given to describe the experimental procedure for an automotive traction application. -
Design Study on Light-weight Quasi-coreless SPMSM using CFRP, Small Amount of SMC Core and Aluminum Winding Reviewed International journal
Takashi Kosaka, Chika Higashihama, Teruchika Ishihara, Hiroaki Matsumori and Nobuyuki Matsui
Proc. of 2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia) 2338 - 2343 2023.05
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213851
DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213851
Other Link： https://ieeexplore.ieee.org/document/10213851/authors#authors
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Study on Electric Motor Vibration Suppression by Active Dynamic Vibration Absorber Reviewed International coauthorship International journal
Takeshi Okada, Makoto Isobe, Takashi Kosaka, Paul Steinmann, Hiroaki Matsumori and Nobuyuki Matsui
Proc. of 2023 IEEE International Electric Machines & Drives Conference (IEMDC) 2023.05
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
DOI： 10.1109/IEMDC55163.2023.10238866
DOI： 10.1109/IEMDC55163.2023.10238866
Other Link： https://ieeexplore.ieee.org/document/10238866
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Isolated AC/DC converter used in EV/PHEV battery charger from household AC outlet Reviewed International journal
Daisuke Endo, Hiroaki Matsumori, Takashi Kosaka, Sadanori Suzuki and Kenichi Nagayoshi
2022 IEEE Energy Conversion Conference & EXPO(ECCE) 2022.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
This paper presents an isolated AC/DC converter used in a battery charger for EV/PHEV. The converter works for EV/PHEV battery charger from a household outlet with AC 100V/200V to the high voltage main battery with 350V.
A typical isolated AC/DC converter consists of a PFC circuit and isolated DC/DC converter. However, this configuration requires the 12-power semiconductor deceives which is an obstacle to downsizing, cost reduction, and power conversion efficiency. Therefore, the authors integrate an isolated SEPIC circuit and a totem-pole PFC circuit. The number of power semiconductor devices is reduced from 12 to 6. In this paper, the operating principle of the proposed converter is firstly explained. Then, the circuit operation at 1kW output is verified in the experiment. -
Comparative Study on Insulation Lifetime of Stator Winding of Dual Inverter Fed Open Winding IPMSM and Single Inverter Fed Star-Connected IPMSM for EV Reviewed International journal
Yuto Maeda, Teppei Hayakawa, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui, Yoichi Miyoshi, Kiyotaka Koga and Subrata Saha
2022 IEEE Energy Conversion Conference & EXPO(ECCE) 2022.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
In this paper, the winding insulation lifetime of a dual inverter fed open winding interior permanent magnet synchronous motor (OWIPMSM) is compared with a conventional single inverter fed star-connected interior permanent magnet synchronous motor (SCIPMSM) for an EV traction application. A twisted pair coil (TP) is connected between the line-to-line terminal of windings of an OWIPMSM and a SCIPMSM and the effect of the line-to-line terminal surge voltage on the turn- to-turn insulation lifetime using the TP is investigated. From the present preliminary insulation lifetime testing results using the TP, it is found that for motors with the same ratings, an OWIPMSM could be designed with a lower insulation level winding than the SCIPMSM for an EV traction application.
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New Experimental System and Procedure for On-line Insulation Life Testing of Stator Winding of Automotive Traction PMSM without using Dynamo System Reviewed International journal
Teppei Hayakawa, Yuto Maeda, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui, Yoichi Miyoshi, Kiyotaka Koga and Subrata Saha
2022 IEEE Energy Conversion Conference & EXPO(ECCE) 2022.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
This paper proposes an experimental procedure using a new experimental system for on-line insulation turn-to-turn life testing of a stator winding without a rotor of permanent magnet synchronous motor. Without using any expensive large capacity dynamo set-up, the system and procedure make it possible to test the insulation life of the stator winding under steady state operation of the motor even though at high temperatures more than
200 degrees Celsius. The line-to-line surge voltage applied to the motor under inverter's PWM control at running state of the motor can be identically replicated by the proposed static system. Suitable control blocks are given to describe the experimental procedure for an automotive traction application. -
Design Optimization Study on HEFSM with Flat Aspect Ratio for Enhancing Power Density and Efficiency Reviewed International journal
T. Okada, M. Saito, T. Aikoh, T. Kosaka, H. Matsumori and N. Matsui
2022 International Conference on Electrical Machines (ICEM) 122 - 128 2022.09
Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)
This paper focuses on a hybrid excitation flux switching motor (HEFSM) as one of the variable flux motors for EV/HEV propulsion. HEFSMs have the advantage in that all the active components are concentrated in the stator, which provides ease of cooling, whereas causes the drawback of being likely to occur severe magnetic saturation on the stator side. Therefore, a low L/D ratio, i.e., a flat aspect ratio, was selected, which offers a wide two-dimensional cross-section and mitigation of the magnetic saturation. In this paper, optimization of permanent magnet arrangement and grades under a low L/D ratio is addressed to enhance efficiency and power density over the entire speed range while satisfying design constraints and required performance for EV/HEV propulsion applications. The experimental verification shows that the motor efficiency of the newly designed HEFSM significantly exceeded that of the previously designed one, which reaches over 92% at the frequent operating point.
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Modeling and Simulation of Battery-powered Electric Vehicle on MATLAB/Simulink Reviewed International journal
Yu Inoue, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui
2021 International Conference on Electrical Machines and Systems (ICEMS 2021) 2021.10
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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Design Study on High Torque Density Multiphase Pole-Change Induction Motor for Vehicle Propulsion Drive Reviewed International journal
Yuya Matsuyama, Kota Ishizuka,, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui
2021 International Conference on Electrical Machines and Systems (ICEMS 2021) 2021.10
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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Optimum Design Study on HEFSM Using Variably Magnetizable PM with Low L/D Ratio and Novel PM Arrangement for EV/HEV Traction Applications Reviewed International journal
Takeshi Okada, Mitsuru Saito, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui
2021 IEEE Energy Conversion Congress and Exposition (ECCE) 3737 - 3744 2021.10
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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Open Device Fault Detection and Fail Safe Action Strategy for a Premium Class Electric Vehicle with a Dual Inverter fed Open Winding Motor Reviewed International journal
Hiroaki Matsumori, Yuto Maeda, Takashi Kosaka, Nobuyuki Matsui, Hiroki Iwai, Teppei Tsuda, Subrata Saha
2021 IEEE Energy Conversion Congress and Exposition (ECCE) 1527 - 1533 2021.10
Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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New PWM Switching Strategy for a Dual Inverter Fed Open Winding Motor Drive System Reviewed International journal
Yuto Maeda, Hiroaki Matsumori, Takashi Kosaka, Nobuyuki Matsui, Hiroki Iwai, Teppei Tsuda, Subrata Saha
2021 IEEE Energy Conversion Congress and Exposition (ECCE) 4803 - 4809 2021.10
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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Magnetization State Control of Variably Magnetizable Permanent Magnets Employed in HEFSM at Starting Up Reviewed International journal
T. Okada, M. Saito, T. Kosaka, H. Matsumori, and N. Matsui
2021 IEEE International Electric Machines & Drives Conference (IEMDC) 1 - 8 2021.05
Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE
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