文档介绍：永磁直流无刷电机三维温度场分析
[史忠震 1,2,张卫 2,李青青 1,2,许贞俊 1]
[,贵阳 550025]
[,贵阳 550003]
[摘要]:利用 ansys 有限元分析软件对永磁无刷直流电动机进行了温度场分布研究,应用传热学理论建立
了电机三维暂态温度场计算模型,根据永磁直流无刷电机内热交换理论给出了边界条件,并在求解域内给
出了一定的假设,计算电机的主要发热热源——通过电磁场计算,确定了定子铁耗和转子护套表面的损耗,
通过理论计算确定了电动机的铜损和机械损耗。以某型永磁无刷直流电动机为例,该电机工作时间为
10min-12min,因此对其进行前 12min 的暂态温度场分析计算,得到了永磁直流无刷电机运行 5min 和 12min
时电机整体的温度场分布云图以及电机各部件在 12min 内的变化曲线,并与实测结果对比基本一致,证明
该三维模型简化合理,采用的分析方法正确。说明该分析方法对于永磁直流无刷电机的设计和优化具有一
定的参考意义。
[关键词]:永磁直流无刷电机;温度场;有限元;内热交换
Analysis of 3D temperature field for the permanent
brushless DC motor
SHI ZHong-ZHen1,2,ZHANG Wei2,LI Qing-Qing1,2,XU Zhen-Jun1
[ Engineering College, Guizhou University, Guiyang 550025, China]
[ Engineering Research Center for Small and Special Precision Motors,
Guiyang 550003, China]
[Abstract]: In this paper the temperature field is calculated using 3D Finite Element Method, the
mathematic model of the 3D transient temperature field for a motor is established,and hypothetical
conditions and boundary conditions of the solved region are presented. The main heat source of the
motor and the ic field calculation to determine the stator iron losses and rotor sheath
surface loss. A type of Permanent brushless DC motor is taken for example, The motor working
time is 10min-12min,before the first 12min of transient temperature field