On-line identification and compensation methods of Permanent magnet flux linkage fluctuations

A kind of flux linkage identification method for Permanent magnet synchronous servo motor (PMSM) based on model reference adaptive recognition system method (MARS) is proposed in this paper. And the flux linkage fluctuation compensation method is introduced to minimize the influences of flux linkage fluctuations. These methods can improve the motor control performance such as low speed stability, high speed stationarity and position accuracy. The simulation and experiment confirmed that identifications method can estimate the real flux linkage value, and also they also can improve position control precision of PMSM.