高导热耐高温环氧灌封树脂在低压电机上的应用研究

Application of High Thermal Conductive and High Temperature Resistant Epoxy Encapsulating Resin in Low Voltage Motor

为提高电机绝缘结构的导热性能和耐环境性能,本研究针对某高导热耐高温环氧灌封树脂的常规性能、耐热性能、导热性能及耐环境性能等进行了分析,并制作样机,对其在低压电机上的应用性能进行测试。结果表明:该高导热环氧灌封树脂具有优异的力学性能和电气性能,导热系数为1.18 W/(m·K),温度指数达到187.5℃,具有优异的耐低温及冷热冲击性能,且与漆包线具有良好的相容性。高导热绝缘树脂的应用可有效提升电机绝缘系统的导热性能,在相同条件下使电机温升比使用普通耐高温绝缘漆的电机下降了20.7℃。同时,相对于真空压力浸漆工艺,通过真空灌封工艺制作的电机绝缘结构整体性更优,且避免了槽口挂漆量较低的缺点,具有更优的电气性能和防潮性能。

In order to improve the thermal conductivity and environmental resistance of motor insulation system,we analyzed the conventional properties,heat resistance,thermal conductivity,and environmental resistance of a high thermal conductive and high temperature resistant epoxy encapsulating resin.A prototype was made,and the application performance of the epoxy encapsulating resin in low voltage motor was tested.The results show that the epoxy encapsulating resin has excellent mechanical and electrical properties,excellent low temperature and thermal shock resistance,and good compatibility with enameled wire,and the thermal conductivity and temperature index reach 1.18 W/(m·K)and 187.5℃,respectively.The application of high thermal conductive insulating resin could effectively improve the thermal conductivity of the motor insulation system,under the same conditions,the temperature rise of motor decreases by 20.7℃compared to the motor with ordinary high temperature resistant insulating varnish.At the same time,compared with the vacuum pressure impregnation process,the insulation system of the motor made by the vacuum encapsulation process has better integrity,electrical properties,and humidity resistance,and the disadvantage of low paint hanging at the groove is avoided.