Switching Active Disturbance Rejection Based Deadbeat Predictive Current Control for Permanent Magnet Synchronous Motors

To enhance prediction precision and tracking performance of current controllers for permanent magnet synchronous motor (PMSM) drives subject to control delay and disturbances, a switching active disturbance rejection based deadbeat predictive current control (SADR-DPCC) strategy of the PMSM is presented in this article. First, a traditional DPCC strategy is introduced based on the dynamic model of the PMSM and the parameter sensitivity of the DPCC is analyzed. Then, an active disturbance rejection based DPCC (ADR-DPCC) strategy is presented to alleviate the influence of disturbances on the DPCC controller. However, the ADR-DPCC only with the linear extended state observer (LESO) is incompetent in the applications with high requirement of control accuracy and robustness. Therefore, the SADR-DPCC strategy of the PMSM is proposed to integrate the advantages of the LESO and nonlinear extended state observer (NLESO) with a hysteretic switching strategy. Moreover, the stability analysis and parameter setting of the NLESO are elaborated, which are simplified by the switching strategy of the SADR-DPCC. Finally, the effectiveness and superiority of the SADR-DPCC are validated experimentally.