A Current Harmonic Suppression Method of PMSM Based on Resonant Controller and Asymmetric-SVPWM Strategy

Abstract

Resonant controllers can be utilized in the variable frequency control system of permanent magnet synchronous motor (PMSM) to suppress the current harmonics for its capacity on extracting signals of specific frequency. However, the performance of resonant controllers on high-order harmonics suppression can be weakened by the limited bandwidth of the control system. This paper improves the space vector pulse width modulation (SVPWM) algorithm to the asymmetric-SVPWM (ASVPWM) algorithm and combine it with resonant controllers to expand the system bandwidth and promote the performance of resonant controllers on suppressing high-order harmonics.