大功率永磁同步电机磁热耦合分析

Electromagnetic-thermal Coupled Analysis of High-power Permanent Magnet Synchronous Motor

本文以一台160kW永磁同步电机为研究对象,根据电机的结构参数在电磁仿真软件中建立了电机的有限元仿真模型,计算出电机在额定工况运行下的电磁场及铁耗和铜耗的分布情况。将三维模型导入到温度场仿真软件中并计算出各主要部分的体积,结合铁耗和铜耗的计算结果求出电机各主要部分的生热率,进而求出电机在额定工况下稳定运行后电机各部分的温度分布情况。在此基础上对电机进行温升实验,将两者结果进行对比,二者结果基本一致,证明磁热耦合仿真在分析电机内部温度场分布时准确性满足要求。

In this paper,a 160kW permanent magnet synchronous motor is taken as the research object.The finite element simulation model of the motor is established in the electromagnetic simulation software according to the structural parameters of the motor.The electromagnetic field,iron loss and copper loss of the motor under rated working conditions are calculated.The 3D model is imported into the temperature field simulation software and the volume of each main part is calculated.Combined with the calculation results of iron loss and copper loss,the heat generation rate of each main part of the motor is obtained.Furthermore,the temperature distribution of each part of the motor after stable operation of the motor under rated conditions is obtained.On the basis of this,the temperature rise test of the motor is carried out,and the results are compared.The results show that the electromagnetic-thermal coupled simulation meets the requirements when analyzing the internal temperature field distribution of the motor.