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.

国家自然科学基金项目（51307045）；黑龙江省自然科学基金项目（LH2019E075）