Improved Advanced Angle Field Weakening Control Strategy for Multi-phase PMSM

This paper mainly proposes an improved advanced angle field weakening control strategy for multi-phase PMSM. Firstly, voltage vector reference limit of multi-phase PMSM is analyzed and calculated. This method considers the influence of voltage amplitude and phase angle of different harmonic subspaces on the voltage vector reference limit, which greatly improves the accuracy of the calculation. Then, an advanced angle field weakening control strategy based on third harmonic current injection is proposed. The control strategy adjusts the optimal reference current commands of different harmonic subspaces in real time to maximize the voltage limit of the inverter. Finally, the effectiveness of the proposed method are verified by simulation results.