Compensation Algorithm for Periodic Torque Ripple of AC Motors

교류전동기의 주기적인 토크리플 보상알고리즘

  • 김병섭 (경북대 대학원 전기공학과) ;
  • 최종우 (경북대 전자전기컴퓨터학부)
  • Published : 2006.12.20

Abstract

The electrical frequency synchronized periodic torque ripple exits in the AC motor. There are various sources of torque ripple in AC motor such as current measurement error, dead time, etc. This paper proposes a compensation algorithm which suppresses undesired side effect known as the periodic torque ripple of AC motor. The torque ripple compensation classified as the speed ripple detector and torque ripple compensator. This paper proves a speed ripple minimization at steady state by analysis of torque ripple compensator. A new speed ripple detector improves the performance of torque ripple compensation algorithm. The simulation and experimental results show that the compensation algorithm is effective and the torque ripple compensation method improves the performance of speed ripple detector by eliminating torque ripples effectively.

교류 전동기는 전류의 측정오차와 데드타임(dead time) 등의 영향으로 전기각주파수에 동기된 주기적인 토크리플이 발생한다. 본 논문에서는 주기적인 토크리플 보상알고리즘을 제안한다. 보상기는 토크리플에 의해 생성된 속도리플의 크기을 관측하는 속도리플 관측기와 관측한 양으로 토크리플을 보상하는 토크리플 보상기로 나누어진다. 본 논문에서는 토크리플 보상기의 해석을 통해 정상상태에서 속도리플이 제거되고 새롭게 제안된 속도리플 관측기을 적용하여 성능이 향상됨을 보였다. 제안한 주기적인 토크리플 보상알고리즘에 의해 토크리플 성분이 보상됨을 모의 실험과 실험을 통해 검증하였다.

Keywords

References

  1. Jong-Woo Choi, Sang-Sup Lee, Sang-Yeop Yu and Seok-Joo Jang, 'Novel Periodic Torque Ripple Compensation Scheme in Vector Controlled AC motor drives,' Applied Power Electronics Conference and Exposition, 1998, pp. 81-85
  2. D. Antic, J. B. Klaassens, W. Deleroi, 'Side Effects in Low-Speed AC Drives, ' IEEE PESC Conference, 1994, pp. 998-1002
  3. Dea-Woong Chung and Seung-Ki Sul, 'Analysis and Compensation of Current Measurment Error in Vector Controlled AC motor Drives, ' IEEE Transaction on Industry Application, 1998, pp. 340-345
  4. Roberto Barro and Ping Hsu, 'Torque Ripple Compensation of Induction Motors under Field Oriented Control,' IEEE APEC Conference, 1997, pp. 527-533
  5. Roberto Barro and Ping Hsu, 'Torque Ripple Compensation of Vector Controlled Induction Machine,' IEEE PESC Conference, 1997, pp. 1281-1287
  6. Jong-Woo Choi, Seung-Ki Sul, 'Inverter Output Voltage Synthesis Using Novel Dead Time Compensation, ' IEEE Trans. Power Electronics, vol. 11, no. 2, pp. 221-227 https://doi.org/10.1109/63.486169
  7. Weizhe Qian and S.K. Panda, 'Torque ripple minimization in PM synchronous motors using iterative learning control,' Power Electronics, IEEE Transactions on, 2004, pp. 272-279
  8. Weizhe Qian, S.K. Panda, J.X.Xu, 'Reduction of periodic torque ripples in PM synchronous motors using learning variable structure control, 'Industrial Electronics Society, IEEE Conference, 2002, pp. 1032-1037
  9. Philip Beccue, Jason Neely, Steve Pekarek, Daniel Stutts, 'Measurement and control of torque ripple-induced frame torsional vibration in a surface mount permanent magnet machine,' Power Electronics, IEEE Transactions on, 2005, pp. 182-191