高速永磁同步电机温度场及水冷分析

Analysis of Temperature Field and Water Cooling of High Speed Permanent Magnet Synchronous Motor

高速永磁同步电机(HSPMSM)具有体积小、高功率密度等特点,导致电机在高速运行时温升越来越高,过高的温度影响永磁体、电机零部件使用寿命,造成永磁体退磁等现象,严重影响电机正常运转。通过ANSYS等软件对高速永磁同步电机建立三维稳态温度场有限元分析,通过多物理场耦合分析,得到电机温度场分布情况;采用一种新型水冷结构,分析开不同数量的冷却槽对电机磁密及电机水冷之后定子、永磁体温度的分布情况,对比冷却之后温度场变化,为高速永磁电机冷却及电机优化设计提供依据。

The temperature rise higher and higher in high-speed permanent magnet synchronous motor(HSPMSM)by its small size,high power density and other characteristics,which decrease service life of motor component,and result in the demagnetization phenomenon of permanent magnet,then seriously affect the normal operation of the motor.The finite element analysis for three-dimensional steady-state temperature field of HSPMSM was analyzed by ANSYS software.The distribution for temperature field of motor was obtained by multi-physical filed coupling.A new type of water-cooling structure was used to analyze the stator and rotor temperature distribution,then compared with the temperature field before cooling,which could provide the basis for design the HSPMSM and motor optimization.