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

  • 제20권5호
  • /
  • Pages.429-436
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  • 2015
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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영구자석 동기 전동기의 고속운전 시 토크리플 저감 알고리즘

Torque Ripple Reduction Algorithm of PM Synchronous Motor at High Speed Operation

  • Kim, Jong-Hyun (Dept. of Control & Instrumentation Engineering, Korea Nat'l Univ. of Transportation) ;
  • Cho, Kwan-Yuhl (Dept. of Control & Instrumentation Engineering, Korea Nat'l Univ. of Transportation) ;
  • Kim, Hag-Wone (Dept. of Control & Instrumentation Engineering, Korea Nat'l Univ. of Transportation)
  • 투고 : 2015.06.16
  • 심사 : 2015.08.17
  • 발행 : 2015.10.20
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초록

Torque ripples generate mechanical vibration at low speed and acoustic noise at high speed. The back emf harmonics of a PM synchronous motor is one of the main sources of torque ripples. To reduce torque ripples resulting from back emf harmonics, dq-axis harmonic currents that reduce the torque ripples are generally compensated to the current controller. Harmonic current compensation is effective at low speed, but it is not applicable at high speed because of the limited bandwidth of the current controller. In this study, dq-axis harmonic voltage compensation that can reduce torque ripples at high speed is proposed. The dq-axis harmonic voltages are calculated from the motor speed and the dq-axis harmonic currents. The effectiveness of the proposed method in reducing torque ripple is verified by a simulation and experiments.

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참고문헌

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