Design of Model Free Adaptive Controller for PMSM Speed Control

In order to gain favorable control performance of permanent magnet synchronous motor (PMSM) drive system in the presence of structural perturbation and load disturbance, model free adaptive control (MFAC) method is introduced in the design of speed controller, since it only relies on the input and the output measurement data of the controlled plant. Analysis of the stability, the convergence and the parameter tuning of the proposed control algorithm from a global perspective are also included. Besides, an optimized full form dynamic linearization (FFDL) MFAC method is presented, aiming at the convergence speed and the tracking capability of this algorithm. Simulation results show that the control effect of the improved control strategy is better than that of both the traditional PI control scheme and the conventional MFAC method.