5摘  要：异步电动机定子绕组的温度分布特别是最高温度决定了其工作寿命与过载性能。该文以测试为基础、应用有限元分析软件建立的异步电动机定子全域三维温度场仿真计算模型，计算了某型号异步电动机定子全域三维温度分布。根据该温度场计算结果，分析了温度分布及最高温度区域的特点与成因。在此基础上提出了基于异步电动机定子全域三维温度场仿真模型，优化定子散热结构，降低异步电动机定子绕组最高温度，提高工作寿命与过载性能的思路与方案。计算结果表明针对该文的研究对象，所提出的优化措施可有效降低定子绕组最高温度。该思路将适用于各种异步电动机。
关键词：异步电动机；三维温度场；仿真；结构优化；最高温度；过载性能

Abstract: Temperature distribution, especially the maximum temperature of stator windings determines induction motor's life and overload performance. The simulation model of 3D thermal field of induction motor stator was established based on the test and the temperature distribution was calculated.  According to the result, analysed the characteristics of temperature distribution and formation cause of maximum temperature area were, proposed the idea and scheme about optimizing the heat dissipation structure of the stator to reduce the maximum temperature of induction motor stator windings. Thus improved the induction motor's life and overload performance. The results show that optimization measures proposed in this paper can effectively reduce the maximum temperature of stator windings. The idea will be applied to a variety of induction motors.
Key words: asynchronous motor; 3D thermal field; simulation; structure optimization; maximum temperature; overload performance