Research on cooling performance of natural air-cooled drive motor with internal oil-cooled chassis
Aiming at the problems of permanent magnet synchronous motors with high power density,large torque and small volume for vehicle driving,such as small effective heat dissipation area of traditional air-cooled structure and high temperature of internal components caused by electromagnetic loss during operation,an oil-air hybrid cooling method with natural air cooling of internal cavity oil-cooled chassis was proposed,to meet the temperature performance requirements of each component in the drive motor.The equivalent thermal network method was used to calculate the temperature of the stator winding,stator,permanent magnet and rotor in the drive motor under different working conditions,and the highest temperature of the drive motor appeared at the stator winding.Then,the temperature at the stator winding end of the drive motor was measured by experiment and compared with the simulation results.The relative error between the simulation results and the measured results was less than 5%.The results showed that the temperature of the stator winding and other components of the oil-air hybrid cooling drive motor under different working conditions dropped obviously and met the temperature performance requirements,which indicated that the oil-air hybrid cooling method had good heat dissipation performance and high cooling efficiency.The research results can provide reference for the development of heat dissipation systems for vehicle drive motors.
国家科技期刊平台
NSTL
万方数据
