Research on Fractional-Order Active Disturbance Rejection Control Method for Permanent Magnet Synchronous Motor

To solve the problems of large overshoot and slow dynamic response speed in traditional linear active disturbance rejection control (LADRC) of permanent magnet synchronous motor (PMSM), this paper proposes a disturbance rejection control method based on improved linear state error feedback (LSEF). Firstly, design a fractional-order proportional integral (FOPI) controller, and combine the error feedback rate module of FOPI and active disturbance rejection controller (ADRC) to create a linear error feedback rate based on FOPI. And compare and verify the new controller through speed tracking and sudden-load simulation experiments. The results show that under the above two experimental conditions, the overshoot of the latest self-disturbance rejection controller based on FOPI is reduced by 90% and 75% compared to traditional ADRC respectively; The adjustment time has been reduced by 10% and 17% respectively. This indicates that the new self-disturbance rejection controller based on FOPI has a smaller overshoot and stronger robustness.