整车运行环境下油冷对外转子轮毂电机温度特性的影响  

The Effects of Oil Cooling on the Temperature Field of Out-rotor In-wheel Motor Under Vehicle Operation Environment

作　　者：赵兰萍[1,2] 江从喜[2] 徐鑫 杨志刚[2,3] Zhao Lanping;Jiang Congxi;Xu Xin;Yang Zhigang(School of Mechanical Engineering,Tongji University,Shanghai 201804;Tongji University,Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems,Shanghai 201804;Beijing Aeronautical Science & Technology Research Institute,Beijing 102211)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]同济大学上海市地面交通工具空气动力与热环境模拟重点实验室,上海201804 [3]北京民用飞机技术研究中心,北京102211

出　　处：《汽车工程》2019年第4期373-380,共8页Automotive Engineering

基　　金：上海市地面交通工具空气动力与热环境模拟重点实验室(18DZ2273300)资助

摘　　要：鉴于电动汽车用外转子轮毂电机特殊的结构形式,在整车运行环境下对轮毂电机的温度特性进行研究,以对比自然风冷和油冷两种方式下电机各部位的温度场。在此基础上,研究不同冷却油介质对电机各部位最高温度的影响。结果表明:CFD仿真结果与整车热环境风洞实验结果基本吻合;油冷冷却可有效降低轮毂电机内部最高温度,同时起到良好的温度均衡作用;4种冷却油均使绕组最高温度显著下降,导热系数越高,冷却油的热量传递和均温能力越强,电机冷却效果越好。In view of the special structure of outer rotor in-wheel motors for electric vehicles,the temperature characteristics of the in-wheel motor are studied under vehicle operation environment,to compare the temperature fields of the different parts of the motor under natural air cooling and oil cooling modes.Then on this basis,the influences of different types of cooling oil on the highest temperature in different parts of the motor are studied.The results indicate that the simulation outcomes well agree with that of hot environment wind tunnel test of vehicle.The oil cooling can effectively reduce the maximum temperatures inside the in-wheel motor,and plays a good role in temperature equalization in the motor.All the four types of cooling oil can significantly lower the highest temperature of motor coil,the higher the thermal conductivity of cooling oil,the stronger the capability of heat transfer and temperature equalization,and hence the better the cooling effects of the motor.

关 键 词：电动汽车 轮毂电机 油冷 温度场 

分 类 号：U469.72[机械工程—车辆工程]