Integral Sliding Mode Control Based Deadbeat Predictive Current Control for PMSM Drives With Disturbance Rejection
Yongxiang Xu, Shaobin Li, Jibin Zou
Abstract
To promote the control performance of the modern high-precision permanent-magnet synchronous motor (PMSM) system on the existence of the time-delay and parameter mismatch, an improved deadbeat predictive current control (DPCC) method is proposed in this article. First, the conventional DPCC method considering the time-delay compensation is introduced. Along with this method, the negative influence on the control performance when the parameter mismatch occur is analyzed mathematically. Afterward, this article proposes a novel compensation scheme based on the integral sliding mode control (ISMC) theory for disturbance elimination. This proposed method incorporates the disturbance rejection term in the main control loop, which avoids the side effects of the traditional parallel external observer-based compensation method. The convergence of this disturbance rejection design is also proved. Meanwhile, the procedure of the ISMC-based DPCC method in digital implementation is illustrated and the resulting problems are discussed and solved. Furthermore, the chattering problem caused by the signum function is significantly suppressed by introducing the improved super-twisting algorithm combined method. Finally, experimental results confirm the validity of the proposed ISMC-based DPCC controller.