高速列车牵引电机定子绝缘劣化机理研究综述

Overview of Research on Stator Insulation Deterioration Mechanisms in High-Speed Train Traction Motors

摘要:

根据高速列车牵引电机实际运行工况和外部环境，梳理并总结出电机定子绕组绝缘劣化过程中电磁应力、温度应力、机械应力和环境应力的协同作用机制，阐明定子绕组绝缘劣化机理，指出进风侧的端部和铁心槽口绕组的绝缘层是牵引电机定子绕组绝缘最薄弱部位，分析了现有研究存在的局限性并提出未来亟待解决的关键问题。

Abstract:

Based on the actual operating conditions and external environment of high-speed train traction motors， this paper reviews and summarizes the synergistic effects of electromagnetic， thermal， mechanical， and environmental stresses on insulation deterioration. It elucidates the degradation mechanisms of stator winding insulation and identifies the end windings on the air intake side and the core slot windings as the weakest points of the traction motor stator insulation. Furthermore， this study highlights the limitations of existing research and critical issues that require future attention.