Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (5): 741-746.DOI: 10.12068/j.issn.1005-3026.2020.05.022

• Information & Control • Previous Articles     Next Articles

Super-Twisting Sliding Mode Observer Based Sensorless Control of PMSM

LIU Zhen, MIAO Shu, LI Wen-hui, LIU Jing-jing   

  1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2019-11-18 Revised:2019-11-18 Online:2020-05-15 Published:2020-05-15
  • Contact: MIAO Shu
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Abstract: In order to realize the high performance requirements of permanent magnet synchronous motor(PMSM) vector control system, a reverse electromotive force (EMF) observer of PMSM based on super-twisting second order sliding mode theory is proposed. The rotor position and speed of the PMSM can be obtained by computing the observed value of the reverse electromotive force. The vector control is used to control the motor speed so as to realize the sensorless control of PMSM. According to the Lyapunov stability theory, the convergence property of the observer is proved.In addition, compared with the traditional first-order sliding mode algorithm, the super-twisting algorithm greatly weakens the chattering of the system, and reduces the overshoot adjustment time of the system. The simulation and experiment results show that the scheme can estimate the rotor position and speed effectively, and the system has good robustness and dynamic response ability.

Key words: PMSM (permanent magnet synchronous motor), STSMO(super-twisting sliding mode observer), Lyapunov stability, sensorless control; vector control

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