永磁电机定子装压过盈量会造成电机主磁场变化，使实际电机的性能偏离设计值。为了优化设计，依据铁磁学理论和磁路定律，研究过盈量对定子铁心产生应力、应变的影响，提出定子磁压降与过盈量的解析方程。以一台560 kW电机为研究对象，建立求解模型并进行仿真运算和试验，证实了求取最优过盈量的有效性。本文的分析结果对永磁电机优化设计提供了一定的借鉴意义。

The change of the main magnetic field caused by the interference of the permanent magnet motor stator will cause the performance of the actual motor to deviate from the design value. The influence of interference on the stress and strain of stator core is studied according to the ferromagnetism theory and magnetic circuit law to optimize the design. The solution model is established and the simulation calculation and experiment are carried out based on a 560 kW motor. The analysis results in this paper can be used for reference in the optimization design of permanent magnet motor.

天津市科委重点研发计划项目（18YFFCTG00040）