裂齿式永磁游标电动机性能分析与比较.

To solve the problems of permanent magnet vernier motor（PMVM） with high torque density and high power density, the performance of PMVM was compared with that of traditional permanent magnet synchronous motor（PMSM）. The structure and working principle of 6-slot/32-pole split-tooth PMVM were introduced. The air-gap flux density of PM field and armature reaction magnetic field（ARMF）, the no-load EMF, the torque and the loss of 6-slot/32-pole split-tooth PMVM were analyzed by finite element simulation software of JMAG and quantitatively compared with those of two traditional PMSMs with the same diameter, stack length and number of stator teeth. The results show that compared with 6-slot/32-pole and 6-slot/4-pole PMSMs, the average torque of 6-slot/32-pole split-tooth PMVM is increased by about 45.0% and 76.2%, and the torque ripple is decreased about 90.5% and 95.0%, respectively. The results reveal that the split-tooth PMVM has merits of high torque density and low cogging torque. However, the air-gap flux density of the split-tooth PMVM contains large number of harmonics with different pole-pairs and rotation speeds, which leads to higher iron loss and PM eddy current loss. [ABSTRACT FROM AUTHOR]