Torque Ripple Suppression of Permanent Magnet Synchronous Motor Based on Improved Active Disturbance Rejection Controller

The traditional auto disturbance rejection controller (ADRC) can't effectively suppress the torque ripple of the permanent magnet synchronous motor (PMSM) caused by current sampling errors. A speed loop generalized integral-decoupled auto disturbance rejection controller (GI-DADRC) is proposed, which utilizes the high gain characteristics of quasi-resonant integrators at resonant frequencies to enhance the observation accuracy of extended state observer (ESO) against harmonics disturbance. This method not only retains the ability of traditional ADRC in suppressing the DC disturbance, but also improves its performance to suppress harmonics disturbance. Simulation results prove the feasibility of the proposed method.