关键词: 内置式永磁同步电机, 裂比分析, 转子设计, 电机设计

Abstract: Aiming at the permanent magnet synchronous motor with limited installation space and fixed stator outer diameter,the presented a design method based on the relationship between crack ratio and power,which could meet the high power requirements of the motor through the design of air gap magnetic field. The influence of the split ratio on power was analyzed. Under the premise of constant copper loss, the relationship between power and split ratio was derived and the variation law of power with the split ratio under different air-gap flux densities was obtained. A motor design method was proposed when the split ratio of the motor was constrained. Taking a 4-pole 18-slot permanent magnet synchronous motor as an example,the air-gap flux density was adjusted through rotor structure design to obtain the optimal design scheme under the split ratio constraint. The validity of the proposed method was verified through finite element analysis.

Key words: interior permanent magnet synchronous motor( IPMSM), split ratio analysis,rotor design,motor design