关键词: 永磁同步电机, 等效热网络, 流固耦合, 温度场

Abstract: Because of the advantages of high torque, high power and high efficiency, the low speed and high torque permanent magnet synchronous motor is widely used in the mining field. In the normal operation process, the electric opportunity generates a high temperature rise,which affects the service life of the motor. this takes a mine-used low-speed high-torque permanent magnet synchronous motor as the research object,and uses the equivalent thermal network method to calculate the temperature rise of the motor. According to the motor structure,the equivalent thermal network model of the motor under the water cooling system of the casing and the end potting glue is built. The heat dissipation coefficient of the
surface and end faces of different parts of the motor and the thermal resistance of each heat conduction path are calculated and analyzed. The temperature rise of each node of the motor is calculated by the program,and then the fluid-solid coupling method is used. The calculation results and experimental data verify the accuracy and reliability of the model.