车用永磁同步电机定子强度分析与结构设计  

Strength analysis and structure design of permanent magnet synchronous motor stator for electric vehicles

作　　者：田中梁 吴鹏飞 仝宇 孙岩桦[1] TIAN Zhong-liang;WU Peng-fei;TONG Yu;SUN Yan-hua(School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《电机与控制学报》2022年第5期1-7,共7页Electric Machines and Control

基　　金：上海汽车工业科技发展基金会(1707)。

摘　　要：为了进一步减小损耗、提高效率并增大电机的功率密度,新一代车用永磁电机定子可选用更高磁性能的取向硅钢片代替常用的无取向硅钢片。对于此类电机,由于定子齿部和轭部磁路方向不同,为充分发挥材料性能,必须采用齿轭分离的拼接结构。针对一种采用齿轭分离结构的电机定子,通过有限元分析,研究了榫接参数对其结构强度的影响,分析了不同接触边界下的静态和动态力学模型,确定了装配工艺过程中过盈量、热套温度等结构设计敏感参数。对现有榫接结构进行优化,并计算确定其装配工艺。设计样机和采用整体无取向硅钢片结构的原型电机相比,峰值功率、最大效率、高效区等各方面性能均优于原型电机。该研究可为齿轭分离结构永磁同步电机的结构设计提供参考。In order to improve the efficiency,reduce the loss and increase the power density of the motor,in the new generation permanent magnet motor the oriented silicon steel sheet was selected as the stator material.Because the direction of the magnetic circuit of the stator tooth and the magnet yoke is different,the stator tooth and magnet yoke must be tenoned.The stator structure of a kind of magnetic anisotropic motor was designed and optimized.Through finite element analysis,the influence of tenon parameters on its structural strength was studied,the static and dynamic mechanical models under different contact boundaries were analyzed,and the sensitive structural design parameters such as interference and hot sleeve temperature in the assembly process were determined.The existingmagnetic anisotropic motor structure was optimized,and its assembly process was calculated and determined.The prototype designed is superior to the magnetic isotropic motor in peak power,maximum efficiency and high efficiency area.This study provides a reference for the structural design of magnetic anisotropic motor stator.

关 键 词：电机定子 齿轭分离结构 取向硅钢片 榫接 热装配 定子齿片 

分 类 号：TM351[电气工程—电机]