基于流固耦合的电动汽车轮毂电机不同工况瞬态温度场分析  

Analysis of transient temperature field of electric vehicle hub motor based on fluid-solid coupling

作　　者：陈丽香[1] 刘佳琛 张超[1] 王晓宇[1] CHEN Li-xiang;LIU Jia-chen;ZHANG Chao;WANG Xiao-yu(National Engineering Research Center for Rare-earth Permanent Magnetic Machines, Shenyang University of Technology, Shenyang 110870, China)

机构地区：[1]沈阳工业大学国家稀土永磁电机工程技术研究中心,辽宁沈阳110870

出　　处：《电工电能新技术》2021年第8期73-80,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：江西省重大研发专项项目(20173ABC28007);沈阳市科技计划项目(17-7-2-00)。

摘　　要：针对电动汽车轮毂电机在限定空间内散热难问题,以一台高功率密度永磁同步轮毂电机为例,选取典型过载爬坡、急加速和峰值转速三种行驶工况,采用流固耦合方法对永磁同步轮毂电机在电动汽车不同行驶工况下的瞬态温度场进行分析计算,在水冷结构基础上分析不同水道数量、水道宽度及冷却液流量对电机温度场及流阻的影响,并通过改进机壳结构,有效降低电机绕组端部温升,通过试验验证了仿真计算的准确性,为轮毂电机温度场计算和冷却结构的设计提供参考。Aiming at the problem that the heat of the hub motor of electric vehicle is difficult to dissipate in a limited space,three typical driving conditions,namely,overload climbing,acceleration and peak speed are selected as the studying objects.The transient temperature field of permanent magnet synchronous hub motor under different working conditions is analyzed and calculated by magnetic-thermal coupling method.The influence of the number of water channels,the width of water channel and the flow rate of coolant on the temperature field and flow resistance of the motor is analyzed,and through the improvement of the housing mechanism,the temperature rise of the end of the motor winding is effectively reduced.The accuracy of the simulation calculation is verified by comparing the test values,which provides a reference for the calculation of the temperature field of the hub motor and the selection of the cooling structure.

关 键 词：电动汽车 不同工况 永磁同步轮毂电机 瞬态温度场 

分 类 号：TM351[电气工程—电机]