Sliding-Mode Speed Control based on Active-Disturbance-Rejection for Permanent-Magnet Synchronous Motors

In order to improve the tracking performance of speed control system of permanent magnet synchronous motor (PMSM) for new energy vehicles, a novel sliding-mode speed control based on active disturbance rejection (ADR-SMSC) scheme for PMSM is proposed in this article. First, this paper investigates the super-twisting sliding modes to control the speed of PMSM and optimizes the super-twisting algorithm to further reduce chattering problem. Then, to improve the tracking performance and reduce disturbances, an extended state observer (ESO) is designed to estimate the disturbance in real time without the need for an accurate mathematical model of the PMSM. The resulting ADR-SMSC has improved stead-state and transient speed tracking performance and enhanced robustness to disturbance. It also achieved smoother acceleration and deceleration. The simulation results show that the ADR-SMSC improves the response speed and anti-disturbance ability.