The application of predictive functional control for permanent magnet synchronous motor servo system

The speed-regulation problem for permanent-magnet synchronous motor (PMSM) servo system is studied in this paper. The predictive functional control (PFC) theory applied to PMSM is concerned. This paper insists on how to implement the PFC method and what kind of performance can be expected from this technology. First, a simplified model of the PMSM servo system is accounted to refine this approach. Then, the controller based on standard PFC method is designed for speed-loop of the system. The optimal control law can be obtained by given a quadratic performance index. And a modified controller, i.e. PFC plus integrator, is also presented to regulate the effects of disturbances. Simulation and experimental comparisons with the PI control method are given to verify the effectiveness of the proposed method.