转子结构参数对新型反凸极永磁同步电机性能影响的研究

Research on Influence of Structural Parameters on Performance of New Negative-Salient PMSM

永磁同步电机性能优良,但无法调节永磁体励磁,导致调速范围小。利用磁桥增大d轴电感以及利用W型永磁体减小q轴电感,提出一种新型的反凸极永磁同步电机(NSPMSM)转子结构。通过理论分析NSPMSM的转矩和弱磁调速的特点,利用有限元方法验证该电机具有反凸极性。研究转子结构参数对NSPMSM电磁转矩和调速性能的影响。有限元弱磁仿真分析结果与理论分析结果相符合,验证了其提高弱磁调速范围的有效性。

The performance of permanent magnet synchronous motor(PMSM)is excellent.However,the permanent magnet excitation cannot be regulated,which leads to a limited speed regulation range.A novel rotor structure of negative-salient permanent magnet synchronous motor(NSPMSM)is proposed by utilizing the magnetic bridge to increase d-axis inductance and the W-shaped permanent magnet to decrease q-axis inductance.The characteristics of torque and flux-weakening speed regulation of the NSPMSM are analyzed by theoretical analysis,and the negative-salient polarity is verified by the finite element method.The influences of rotor structure parameters on the electromagnetic torque and speed regulation performance of the NSPMSM are studied.The flux-weakening simulation results obtained by finite element method are consistent with the theoretical analysis results,which verifies the effectiveness of the structure in improving the flux-weakening speed regulation range.