基于COMSOL的混合动力汽车ISG电机瞬态温度场分析

Analysis on Transient Temperature Field of ISG Motor in Hybrid Electric Vehicle Based on COMSOL

为了分析ISG电机在混合动力汽车不同工作模式下的工作状态、发热情况以及冷却风速对电机温度场的影响,建立了ISG电机整体结构三维模型,给出了ISG电机边界条件,运用COMSOL软件在电机额定状态和峰值状态下对电机三维瞬态温度场进行了仿真计算,将仿真结果与电机温度试验数据进行对比,并在电机额定状态下对不同冷却风速下电机温度场进行了仿真计算。研究结果表明:电机最高温度出现在电机定子线圈上面;仿真数据和试验数据的一致性验证了该模型及其仿真计算方法的正确性;冷却风速对ISG电机温度场分布趋势影响不大,对ISG电机最高温度影响较大。

In order to analyze ISG motor＇s working states and heating conditions under different operating modes of the hybrid electric vehicle, and cooling wind speed＇s influence on the temperature field of the motor, the overall structure 3D model of ISG motor was established and ISG motor＇s boundary conditions were presented. COMSOL software was used to simulate the motor＇s 3D transient temperature field in the rated and peak state of the motor, and the simulation results were compared with the experimental temperature data of the motor. In addition, the temperature fields of the motor＇s rated state with different cooling wind speeds were also simulated and calculated. The results show that the highest temperature appears in motor stator coil; the consistency of simulation and experimental data proves the correctness of the ISG motor＇s temperature field model and the simulation calculation method; cooling wind speed has a little influence on temperature field distribution trend of ISG motor, but it has a great influence on the highest temperature of ISG motor.