Speed-current composite loop SPMSM control based on ADR-SMC

Abstract

In order to reduce the performance deterioration of the control system of surface-mounted permanent magnet synchronous motor (SPMSM) under the influence of external disturbances, parameter changes and other factors, a new active disturbance rejection sliding mode control strategy (ADR-SMC) based on active disturbance rejection control (ADRC) is proposed. Firstly, based on the speed-current compound loop mathematical model of SPMSM, a nonlinear active disturbance rejection controller (NLADRC) is established to observe internal and external disturbances. Secondly, based on the independent characteristics of each module of NLADRC, a sliding mode error feedback control law with fast convergence speed and strong robustness is designed to replace the NLSEF module by using the characteristics of sliding mode control (SMC) with low requirements and strong robustness for the system model. Then, the sliding mode error feedback control law is updated in real time according to the internal disturbance estimated by the extended state observer (ESO). The resulting ADR-SMC improves the dynamic response capability of the system and improves the robustness of the system to internal and external disturbances. The stability of ADR-SMC compound closed-loop SPMSM control system is proved by Lyapunov theory. Finally, the effectiveness and superiority of the proposed control strategy are verified by experimental results.