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Common-Mode Voltage-Reduction Method of 7-Phase BLDC Motor Control System

Author

Listed:
  • Yung-Deug Son

    (Department of Mechanical Facility Control Engineering, Korea University of Technology and Education, Cheonan 31253, Republic of Korea)

  • Dong-Youn Kim

    (Department of Research and Development, Hyowon Powertech Company, Busan 46241, Republic of Korea)

  • Hyeong-Jin Kim

    (Air Mobility Electric-Motor & Drive Research Team, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Republic of Korea)

  • Jang-Mok Kim

    (Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Republic of Korea)

Abstract

This paper describes a method for reducing the common-mode voltage in a seven-phase brushless DC motor (BLDC) drive. The conventional interleaved method used in the three-phase inverter system is extended and applied. The proposed phase-phase interleaved method is studied to apply the six-phase excitation method for controlling the seven-phase BLDC. The six-phase switching functions related with modulation index (MI) and interleaved angle are obtained, and the average of the common-mode voltage is derived mathematically. The proposed control method reduces the common-mode voltage generation by applying the optimal interleaved angle according to MI. The proposed method is verified by experimental results.

Suggested Citation

  • Yung-Deug Son & Dong-Youn Kim & Hyeong-Jin Kim & Jang-Mok Kim, 2023. "Common-Mode Voltage-Reduction Method of 7-Phase BLDC Motor Control System," Energies, MDPI, vol. 16(5), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2097-:d:1075670
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