An extended design of sliding mode disturbance observer for PMSM

Due to its relatively simple structure and good robustness to system uncertainties and external disturbances, the sliding mode control method has attracted significant attention from relevant experts and researchers, and has been widely used in many studies. In the application process of permanent magnet synchronous motor control systems, due to susceptibility to external disturbances and other unstable factors, the control performance may decline. Therefore, based on the high-order sliding mode algorithm, we investigate improved sliding mode control for permanent magnet synchronous motors. This effectively improves the stability and robustness of the permanent magnet synchronous motor system, enhancing the system's control degree and anti-disturbance ability. The concepts and content proposed in this study are verified through simulation experiments.