Static error elimination algorithm for PMSM predictive current control

This paper presents an algorithm to eliminate the static error of PMSM predictive current control when the model in controller has parameter mismatches with real system. The algorithm mainly applies to cases where the controller inductance is smaller and the controller flux is not accurate. The static error caused by smaller inductance is eliminated by introducing error integration in d axis current control. The error caused by flux inaccuracy is eliminated by dynamically adjusting the flux parameter according to q axis current error. The algorithm is verified through simulation and experiments on a 3.3kW PMSM servo platform.