A Harmonic Current Suppression Method for PMSM Based on Model Predictive Current Control

Abstract:
This paper introduces a harmonic current suppression (HCS) strategy utilizing dual-vector model predictive current control (DV-MPCC) to mitigate the issue of elevated harmonic currents resulting from a reduced switching frequency in permanent magnet synchronous motors (PMSMs). First, the number of switching actions of the inverter at future moments is evaluated and limited to reduce the switching frequency of the inverter. Second, by employing a simple calculation method, the harmonic components induced by the reduced switching frequency are separated from the predicted current. These components are then embedded as one of the performance indicators in the cost function so that high-performance predictive control can be achieved even with reduced switching frequency. Finally, the effectiveness of the proposed method is validated through simulation experiments.