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一、前言牵引电动机的可靠性直接影响到铁路运输的安全。提高牵引电动机的质量,亦即提高其运行的可靠性。当前由于绝缘系统的失效(击穿或破损)而造成的故障在牵引电动机的故障率中所占比例最大。因此绝缘系统的寿命不仅决定着各类电机的寿命,也决定着牵引电动机的寿命。我厂生产的牵引电动机和各类辅助电机中所使用的绝缘材料主要由云母(粉云毋或片云母),玻璃(玻璃丝及其织物)以及聚合物材料(树脂浸渍漆、薄膜……)等组成的。在电机绕组的匝间和对地绝缘中起主要粘接和绝缘作用的聚合物材料,不论其耐热等级如何,电机运转中长期受热、电、机械和环境应力的作用,其性能发生了缓慢的
I. INTRODUCTION The reliability of traction motors directly affects the safety of railway transportation. Improve the quality of the traction motor, that is to improve the reliability of its operation. The current failure due to failure of the insulation system (breakdown or breakage) is the largest contributor to the failure rate of traction motors. Therefore, the life of insulation system not only determines the life of various types of motors, but also determines the life of the traction motor. The insulation materials used in the traction motors and auxiliary motors of our factory mainly consist of mica (powder cloud or mica), glass (glass wool and its fabric) and polymer materials (resin varnish, film ...), etc. consist of. The polymer material that plays a major role in bonding and insulating insulation between the turns of the motor windings and the ground, irrespective of its heat resistance, is subjected to long-term heating, electrical, mechanical and environmental stress during operation of the motor and its performance slows down of