不同冷源轮毂电机多模式切换温度场研究

Research on Temperature Field of In-wheel Motors with Different Cold Sources in Multi-mode Switching

针对轮毂电机电动汽车长时间运行时出现的散热困难问题,设计一种与之匹配的冷却机构和冷却方式.在此基础上,建立轮毂电机热磁耦合温度场仿真模型.对电动汽车的2种运行工况,开展基于不同冷源多模式方式下的轮毂电机热磁耦合温升研究及分析,并对仿真结果进行试验验证.结果表明:电动汽车在长时间运行过程中电机高温问题得到明显改善;2种运行工况对电机温升有不同的影响.仿真结果与试验结果吻合度较高,工况1中绕组最大误差为5.1%,转子最大误差为4.9%,工况2中绕组最大误差为4.8%,转子最大误差为4.5%,为轮毂电机电动汽车长时间运行过程中高温问题的研究提供一定参考.

Aiming at the difficulty of heat dissipation during long-term operation of in-wheel motor electric vehicles,a matching cooling mechanism and cooling method are designed.On this basis,a thermal and magnetic coupling temperature field simulation model of the in-wheel motor is established.Under the two operating conditions,the thermal and magnetic coupling temperature rise of in-wheel motors based on different cooling sources and multi-mode modes are carried out,and the simulation results are verified by experiments.The results show that the motor high-temperature problem is significantly improved during the long-term operation of electric vehicles;the two operating conditions have different effects on the motor temperature rise.The simulation results are in good agreement with the test results.The maximum winding error in working condition 1 is 5.1%,the maximum rotor error is 4.9%,the maximum winding error in working condition 2 is 4.8%,and the maximum error of the rotor is 4.5%.The study of high-temperature problems during long-term automobile operation provides a certain reference.