With the increase of power density of permanent magnet motor for electric vehi-cle,the heat loading and temperature rise increases,which affect the operation performance and reliability of the motor.The magneto-thermal bidirectional coupling analysis of the motor was carried out based on 3D equivalent thermal network method.The 3D equivalent thermal network model of the motor was established to calculate the temperature of the specified node.The fi-nite-element model of electromagnetic field was combined with the thermal network model to carry out the magneto-thermal bidirectional coupling calculation,solve the temperature distribu-tion and determine the cooling effect of the motor.Finally,this paper analyzes the difference between the two temperature rise calculations by fluid-solid coupled temperature field simula-tion.The calculation method of magneto-thermal coupling temperature based on 3D equivalent thermal network has high accuracy,greatly-reduced calculation time and low requirement for computer equipment,which is more suitable for the initial structural design of high-power den-sity motor.
关键词
电动汽车/高功率密度/三维等效热网络/磁热双向耦合/温度场
Key words
Electric vehicle/high power density/3D equivalent thermal network/mag-neto-thermal bidirectional coupling/temperature field
维普
万方数据