sliding mode control

controller

torque control

variable structure

magnet synchronous

synchronous motor

induction motor

motor drive

torque ripple

IEEE Journal of Emerging and Selected Topics in Power Electronics

To improve the tracking performance of the speed controllers of permanent-magnet synchronous motor (PMSM) drive systems with different disturbances, such as internal parameter variations and external load changes, a novel extended-state-observer-based sliding-mode speed control (ESO-SMSC) scheme for PMSM drives is proposed in this article. First, a fast-response SMSC is designed based on the upper bound of the total disturbance. Then, an ESO is designed to estimate the total disturbance in real time. The parameters of the ESO can be easily designed based on the desired bandwidth of the ESO. The estimated total disturbance is then used to update the control law of the SMSC in real time. The resulting ESO-SMSC has improved speed tracking performance and strong robustness to disturbances while maintaining the fast dynamic response. The stability of the closed-loop PMSM drive system with the proposed ESO-SMSC is proven through the Lyapunov theory. The proposed ESO-SMSC is validated by experimental results for a 200-W salient-pole PMSM drive system.

An Extended-State-Observer-Based Sliding-Mode Speed Control for Permanent-Magnet Synchronous Motors