Finite Control Set Model Predictive Position Control of PMSM System

Servo drivers used for position control require higher dynamic performance in speed control. In order to improve the dynamic response speed and position tracking accuracy of permanent magnet synchronous motor (PMSM) system, this paper proposes a control strategy for servo system based on finite control set. First, the mathematical model of the PMSM system is established; then the reference voltage vector is predicted, and a speed expectation correction method is adopted to take into account system stability and fast followability; then the difference between the reference voltage vector and the candidate voltage vector is used as the improved cost function, and the selection of the candidate voltage vector and the optimization of the cost function are performed, to eliminate the complexity caused by the tuning of the weight coefficient. After that, considering the actual user needs, the current limit is integrated into the selection of the candidate voltage vector to achieve the current limit. Finally, the simulation research prove that the proposed control strategy can meet the requirements of dynamic response speed and position tracking accuracy.