定子绝缘系统导热性能对电机温升影响仿真研究

Simulated Research on the Influence of Thermal Conductivity of Stator Insulation System on Temperature Rise of Electric Motor

电机小型化、轻量化和高功率密度的发展趋势,对电机绝缘系统提出了越来越高的要求。绝缘系统导热性能的提升,在一定程度上可以提升电机的整体性能。文章基于电机内传热的基本理论,采用数值方法,针对不同冷却方式和种类的电机,分析了定子绝缘系统导热性能对电机各部分温升的影响。结果表明,定子绝缘系统综合导热性能对电机绕组温升的影响最大,在实际应用中,应尽量使定子绝缘系统综合导热系数值处于某一临界值附近。

At present, the development trend of motor such as downsize, light weight and high power density has put forward higher requirement to its insulation system. The increase of thermal conductivity of insulation system is beneficial to improve the overall performance of motor. Based on the basic theory of heat transfer in the motor and numerical method, this paper analyzed the effect of thermal conductivity of stator insulation system on the temperature rise of the motor. The thermal conductivity of stator insulation system has the greatest influence on the winding temperature rise. In the application, the thermal conductivity of stator insulation system should be as close as possible to a critical value.