牵引电机聚酯亚胺绝缘系统研究

Study on Polyesterimide Insulation System of Traction Motor

结合牵引电机特殊的应用环境及结构特点,本文针对基于聚酯亚胺树脂和三合一云母带的牵引电机聚酯亚胺绝缘系统开展了研究。通过热失重分析及其黏温曲线研究了聚酯亚胺树脂的耐热性和工艺性,在此基础上,采用与聚酯亚胺树脂相容性良好的三合一云母带制备模拟绝缘结构,验证了绝缘系统的电气性能、耐老化性能及可靠性。结果表明:基于本文所选聚酯亚胺树脂及三合一云母带构建的绝缘系统具有突出的工艺性、力学性能、电气性能、耐热性、可靠性及低成本,耐热指数达到215,满足牵引电机高粘结强度、高耐热、高可靠性要求。

Combined with the special application environment and special structural characteristics of traction motor,the polyester imide insulation system of traction motor based on polyesterimide resin and three-in-one mica tape was studied in this paper.The heat resistance and processability of polyesterimide resin were studied by thermogravimetric analysis(TGA)and viscosity-temperature curve,on the basis of it,simulated insulation structure was prepared using the three-in-one mica tape with good compatibility with polyesterimide resin to verify the electrical ageing performance and reliability of the insulation system.The results show that the insulation system based on the selected polyesterimide resin and three-in-one mica tape has outstanding processability,mechanical properties,electrical properties,heat resistance,reliability,and low cost.The heat resistance index reaches to 215,which meets the requirements of high bonding strength,high heat resistance,and high reliability of traction motor.