永磁直驱牵引电机转子过盈配合分析方法

Method to Analyze Interference Fit of Rotors in PM Direct-drive Tractor Motors

在计算铁心过盈配合时,因内嵌式永磁转子的叠片结构和磁钢槽,造成转子铁心的结构不连续性,故不能直接使用工程常用算法进行运算。该文通过分析过盈配合中每个参数或负载与接触应力间的关系,得出它们之间的函数关系,然后再结合工程常用算法推导得出多变量下接触应力的计算方法。并通过有限元仿真,验证了该计算方法的正确性。

During calculating the iron core interference fit,it is not able to directly apply the common engineering calculation method because of the structural discontinuity of the iron core caused by laminated structure and magnet steel grooves of interior PM rotor.After analyzing the relationship between each parameter or load and the contact stress in the interference fit,the functional relationship between them is achieved,and then,the calculation method of multivariate contact stress is obtained by combining with the common engineering algorithm.Correctness of the calculation method is verified by the finite element simulation.