Optimal speed controller design method for permanent magnet AC servo system

In the permanent magnet synchronous motor (PMSM) digital control system, the proportional-integral (PI) regulator is always adopted in the speed control loop. To solve the speed overshoot and oscillation problems in the dynamic process, this paper proposed an optimal speed controller design method. On the basis of the analysis of the permanent magnet AC servo system speed loop model, it relocated the proportional action into the feedback path to constitute integral-proportional (IP) regulator. According to stability and following performance requirements, it formulated the speed error criterion function. The speed controller parameters were optimized, and the anti-windup strategy was considered. The speed control strategy has fast response without overshoot and oscillation, and improves the anti-disturbance performance. The simulation and experimental results verify the effectiveness and feasibility of the proposed method.