整车运行环境下油冷对外转子轮毂电机温度特性的影响*

doi:10.19562/j.chinasae.qcgc.2019.04.003

Abstract

Abstract: 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.

Key words: EVs, in-wheel motor, oil cooling, temperature field

Zhao Lanping, Jiang Congxi, Xu Xin , Yang Zhigang. The Effects of Oil Cooling on the Temperature Field of Out-rotor In-wheel Motor Under Vehicle Operation Environment[J].Automotive Engineering, 2019, 41(4): 373-380.

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

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