车用永磁同步电机三维温度场分析

摘要

In order to study temperature field of PMSM used in vehicles,a rated power of 25 kW PMSM in vehicles was taken as the research obj ect,and its three-dimensional solution domain model was built based on the basic theory ofheat transfer.The motor's steady state condition temperature field and the temperature rise changes were derived through simulation analysis.Also,the simulation analysis on temperature rise of the key parts in the motor was carried out under continuous variable power working conditions,for the sake of studying the changes in motor temperature field under actu-al driving conditions of the vehicle.By building an experimental platform,the effective tests of motor's temperature rise were carried out under rated operating conditions and continuous variable working conditions.By contrast and analysis,experimental data are close to simulation data,which verifies the accuracy of the simulation.%为了研究车用永磁同步电机的温度场，以一台额定功率为25 kW的车用永磁同步电机为研究对象，基于传热学基本理论，建立其三维求解域模型，通过仿真分析，得出了电机额定工况下的温度场及温升变化，并对连续变功率工况下的电机内关键部分的温升进行仿真分析，以研究车辆实际行驶时电机温度场的变化情况。通过搭建的实验平台，对电机工作在额定工况和连续变工况条件下的温升进行了测试。经对比分析，实验数据与仿真数据误差较小，验证了仿真的正确性。