摘  要：该文首先分析了永磁同步电动机凸极比大于1时凸极比、交直轴电感量对电机性能的影响，然后分析凸极比小于1时电机运行性能，进而分析比较凸极比大于1和凸极比小于1时电机在弱磁调速时的转矩和最大输出功率，通过数学仿真求得转矩和最大功率输出曲线，仿真分析结果表明凸极比大于1的永磁同步电动机更适合弱磁调速。
关键词：内置式；永磁同步电动机；凸极比Lq/Ld；弱磁调速；弱磁扩速

Abstract: The paper first analyzed the performance of the PMSM with the saliency-ratio greater than 1and the different d、q inductance, then researched the motor with the saliency-ratio less than 1. At last compared the torque and maximum output power of the PMSM with the saliency-ratio greater than 1and less than 1. Torque and maximum power output curves were obtained by mathematical simulation, the simulation results show that a permanent magnet synchronous motor with the saliency-ratio greater than 1 is more suited to the flux-weakening operation at high speed.
Key words: interior; PMSM; saliency-ratio Lq/Ld; flux-weakening