Research on coordinated speed control of sliding mode and active disturbance rejection based on permanent magnet synchronous motor
In order to solve the problem of large overshoot,serious chattering and poor anti-interference ability when using exponential sliding mode in speed control of permanent magnet synchronous motor(PMSM)vector control,a composite control strategy of sliding mode and reduced-order linear active disturbance rejection was adopted.The strategy made the sliding mode and reduced-order linear active disturbance rejection occupy a certain proportion in the speed loop of the vector control system through a variable weighting factor,and ensured that the sum of their respective proportions was 1.The simulation results show that compared with the exponential sliding mode,the chattering of the control strategy is significantly reduced during acceleration and deceleration,or positive and negative inversion.Besides,no overshoot tracking is achieved,and it can converge to the reference speed faster.During loading and unloading,not only the chattering is significantly reduced,but also the overshoot is reduced by 17％and 18％,respectively.The strategy not only effectively improves the performance of the control system,but also has strong robustness to speed changes.
permanent magnet synchronous motor(PMSM)exponential sliding modereduced-order linear active distrubance rejectioncomposite control
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