The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Active Short Circuit Control Method to Reduce Overcurrent and Oscillation Current in PMSM

영구자석 동기모터 진동 및 과전류 저감을 위한 능동단락회로 제어 기법

  • Choi, Jong-Won (Dept. of Electrical and Electronic Engineering, Hannam University) ;
  • Kim, Yoon-Jae (Dept. of Electrical Engineering, Hoseo University)
  • Received : 2022.01.20
  • Accepted : 2022.03.11
  • Published : 2022.08.20
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Abstract

This study proposes the mitigation method for overcurrent and oscillation motor current in an active short-circuit operation. This operation is attracting attention as the safe state of electric vehicle traction inverters. However, the active short-circuit operation generates oscillation and overcurrent of motor currents during a transient state. The proposed method uses two different safe states in PMSM, such as active short circuit and freewheeling. The active short circuit is used for safe state in a steady state. To reduce the overshoot and oscillation, a freewheeling state is injected between active short-circuit operation by comparing the motor phase current with an analytically calculated steady-state motor current. Freewheeling state is only used in a transient state. The performance is demonstrated through simulations and experimental results. The peak current of the motor was reduced from 52 A to 40 A, and oscillation time was reduced.

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Acknowledgement

이 논문은 2021학년도 한남대학교 학술연구비 지원에 의하여 연구되었음

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