Faculty Profiles - IMAKIIRE Akihiro

Papers - IMAKIIRE Akihiro

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Comparison of Drive Characteristics of Induction Machines with Voltage Unbalance Compensator in Implementing SiC and GaN Power Devices Reviewed

Imakiire Akihiro, Matsuo Yoshitaka, Shibayama Kanata, Matsumoto Satoshi

The Japanese Journal of the Institute of Industrial Applications Engineers ( The Institute of Industrial Applications Engineers ) 13 ( 1 ) 38 - 45 2025.01

Authorship：Lead author,　Last author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

This paper compares drive characteristics of an induction machine with an implemented voltage unbalance compensator in implementing SiC and GaN power devices. Generally, voltage unbalances in the power grid line have been a serious problem for industrial motors due to over currents, torque ripple and local heating causes damage insulating material of stator windings. The authors have proposed the induction machine with the implemented voltage unbalance compensator which is consists of an open-winding induction machine and the voltage unbalance compensator (VUC). We have demonstrated effectiveness the proposed system effect on the torque ripple suppression at the voltage unbalance occurs using simulation in past paper.
In recent years, SiC and GaN power devices have appeared as next-generation power devices. In addition, it is expected that they are applied to various applications instead of Si power device. However, it is difficult to distinguish between SiC and GaN power devices according to the applications because there are power devices with the same voltage rating and similar on-resistance. In order to determine which power device is preferable for the proposed system, this paper compared the loss when implementing SiC and GaN power devices. We also estimated the junction temperature and compared the size of the cooling device. As a result, we clarified the differences between SiC and GaN power devices in the proposed application.

DOI： 10.12792/jjiiae.13.1.38

CiNii Research

Simulation of Torque Ripple Reduction Using an Induction Machine with Implemented Voltage Unbalance Compensator Reviewed

Imakiire Akihiro, Yamakawa Iori, Matsumoto Satoshi

The Japanese Journal of the Institute of Industrial Applications Engineers ( The Institute of Industrial Applications Engineers ) 11 ( 2 ) 84 - 91 2023.01

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

This paper introduces an induction machine with an implemented voltage unbalance compensator. Generally, voltage unbalances in the power grid line have been a serious problem for industrial motors due to over currents, torque ripple and local heating causes damage insulating material of stator windings. The induction machine with the implemented voltage unbalance compensator is consists of an open-winding induction machine and the voltage unbalance compensator (VUC) which is utilized PWM inverter and PWM converter. The stator windings of the induction machine are connected to the power grid line, the other side is connected to the VUC. The VUC provides the compensation voltages to the induction machine during the period unbalance voltage occurred. The torque ripple was compared with and without the VUC using a simulation. As a result, it was clarified the effectiveness for torque ripple reduction of the induction machine with the VUC.

DOI： 10.12792/jjiiae.11.2.84

CiNii Research

Voltage Compensation Performance of the Voltage Unbalance Compensator Using the Method of Symmetrical Components Reviewed International journal

Katsuki T., Yamakawa I., Imakiire A., Matsumoto S.

2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia 2484 - 2490 2022.01

Torque Performance of the 750 W Induction Motor with a Voltage Unbalance Compensator Utilized Independent DC Voltage Source Reviewed International journal

Katsuki T., Imakiire A., Matsumoto S.

23rd International Conference on Electrical Machines and Systems, ICEMS 2020 1275 - 1279 2020.11

Electrical characteristics of double-sided cooling SiC power module using Ni micro plating bonding Reviewed International journal

Itose T., Kawagoe A., Imakiire A., Kozako M., Hikita M., Tatsumi K., Iizuka T., Morisako I., Sato N., Shimizu K., Ueda K., Sugiura K., Tsuruta K.

CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems 422 - 427 2020.01

Thermal Resistance and Transient Thermal Analysis of SiC Power Module Using Ni Micro Plating Bonding Reviewed

Imakiire Akihiro, Sugiura Kazuhiko, Tsuruta Kazuhiro, Toda Keiji, Kozako Masahiro, Hikita Masayuki, Tatsumi Kohei, Inagaki Masakazu, Iizuka Tomonori, Sato Nobuaki, Shimizu Koji, Ueda Kazutoshi

IEEJ Transactions on Industry Applications ( The Institute of Electrical Engineers of Japan ) 139 ( 10 ) 838 - 846 2019.10

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

<p>This paper deals with the thermal resistance and thermal conduction characteristics of a Nickel Micro Plating Bonding (NMPB) power module in comparison with those of a power module adapting a conventional structure with a high-temperature solder attachment. An attempt is made to estimate the thermal resistance and thermal structure function for the two types of power modules when peeling of the chip junction occurs. In terms of spreading heat, an NMPB is superior to a conventional power module using high temperature solder, because NMPB allows spreading heat from both sides of the chip and setting the heat spreader near the chip.</p>

DOI： 10.1541/ieejias.139.838

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Induction machine with localized voltage unbalance compensation Reviewed International journal

Imakiire A., Lipo T.A.

2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 1248 - 1255 2019.05

Development and evaluation of SiC inverter using Ni micro plating bonding power module Reviewed International journal

Kawagoe A., Itose T., Imakiire A., Kozako M., Hikita M., Tatsumi K., Iizuka T., Morisako I., Sato N., Shimizu K., Ueda K., Sugiura K., Tsuruta K., Toda K.

2019 IEEE International Workshop on Integrated Power Packaging, IWIPP 2019 36 - 39 2019.04

Investigation of System Configuration of Wireless Power Transfer System for Power Supply in Pure Car Carrier Ship Reviewed

7 ( 1 ) 14 - 24 2019.03

Electrical Characteristics of Wireless Power Transfer System with Repeating Coil for AGV Considering the Misalignment of Coils Reviewed International journal

6 ( 4 ) 165 - 172 2018.10

Thermal Characteristic Evaluation and Transient Thermal Analysis of Next-generation SiC Power Module at 250 °C Reviewed International journal

2018.07

Dielectric Properties and Partial Discharge Inception Voltage of Aluminum Nitride Insulating Substrate at High Temperatures Reviewed International journal

2018.07

Development of Packaging Technology for High Temperature Resistant SiC Module of Automobile Application Reviewed International journal

Tatsumi K., Inagaki M., Kamei K., Iizuka T., Narimatsu H., Sato N., Shimizu K., Ueda K., Imakire A., Hikita M., Kamimura R., Sugiura K., Tsuruta K., Toda K.

Proceedings - Electronic Components and Technology Conference 1316 - 1321 2017.08

Investigation of prototype SiC power module structure for low inductance and high heat operation Reviewed International journal

Imakiire A., Nakamura K., Tanabe H., Kaisyakuji H., Kubo T., Kozako M., Hikita M.

2017 IEEE International Workshop on Integrated Power Packaging, IWIPP 2017 2017.05

Performance of PM Motor Driven by PWM Inverter with Voltage Booster Using Both Flux Weakening Control and DC Link Voltage Control Invited Reviewed International journal

Imakiire A., Yamamoto K., Hikita M.

Electronics and Communications in Japan 100 ( 4 ) 42 - 55 2017.04

Experimental verification of operation and method of decision of maximum DC link voltage in wireless power transfer system Reviewed International journal

Tokunaga H., Tanabe H., Imakiire A., Kozako M., Hikita M.

IEEE Region 10 Annual International Conference, Proceedings/TENCON 797 - 800 2017.02

Proposal of PM motor driving system consist of PWM inverter with voltage booster for applying to automated guided vehicle Reviewed International journal

2052 - 2057 2016.01

Performance of PM Motor Driven by PWM Inverter with Voltage Booster Using Both Flux Weakening Control and DC Link Voltage Control Reviewed

Imakiire Akihiro, Yamamoto Kichiro, Hikita Masayuki

IEEJ Transactions on Industry Applications 136 ( 1 ) 17 - 28 2016.01

Experimental Verification on Achievement of High Efficiency Operation in Constant Power Region for Permanent Magnet Motor Driven using PWM Inverter with Voltage Booster Reviewed

Imakiire Akihiro, Yamamoto Kichiro, Hikita Masayuki

The Japanese Journal of the Institute of Industrial Applications Engineers 4 ( 2 ) 50 - 59 2016.01

Characterization of contactless power transfer system and investigation of core shape for AGV application Reviewed International journal

2015-August 703 - 706 2015.08

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Papers - IMAKIIRE Akihiro