Current Harmonics Suppression Control of PMSMs Based on Extremum-Seeking Algorithm

In current harmonics suppression of Permanent Magnet Synchronous Machines (PMSMs), conventional control methods by injecting voltage in d-q or alpha-beta focus on the amplitude of current harmonics ignoring the phase. This paper introduces a new current harmonics suppression control based on extremum-seeking algorithm which can minimize the current harmonics amplitude. The dynamic performance of the new method is discussed. Lower current harmonics can be obtained by the new methed. Conclusions are verified by experiment result.