关键词: 转子强度, 多物理场, 永磁同步电机, 内置式永磁, 有限元

Abstract: In order to ensure the rotor core strength of permanent magnet synchronous motor, reduce magnetic leakage
of rotor and improve utilization ratio of magnet, the rotor core strength was analyzed and calculated accurately under multiphysical field, according to the calculation results, the method to improve the structural strength of the rotor was proposed.
take the IPMSM for example, the stress analytical expression of the magnetic barriers under centrifugal force, the rotor core
stress under centrifugal force, electromagnetic force, interference fit and thermal was calculated by finite element method.
The rotor core stress was calculated under multi-physical field. method to improve the structural strength of rotor core was
proposed, the strength of the rotor model was optimized. Research had certain reference significance for the accurate
calculation and improvement of rotor strength of permanent magnet synchronous motor.