温度对变频牵引电机用电磁线绝缘特性的影响 effect of temperature on the insulating properties of magnet wire for inverter-fed traction motor.pdfVIP

66 张依强等：温度对变频牵引电机用电磁线绝缘特性的影响 绝缘材料 2013 ，46(6) 温度对变频牵引电机用电磁线绝缘特性的影响 1 2 张依强 ，罗 杨 （1. 国网山东省电力公司菏泽供电公司，山东 菏泽 274000 ； 2. 西南交通大学 电气工程学院，成都 610031） 摘要：为研究温度对牵引电机用电磁线绝缘特性的影响，基于IEC 60851-5 标准设计了一套变频电机绝缘老 化装置，研究了不同温度下电磁线的失效时间和击穿电压，并探讨了电磁线的介质损耗（tanδ）温度谱。基于 方波脉冲条件下的局部放电测试系统，研究了温度对局部放电特性的影响。结果表明：随着温度的升高，绝 缘寿命呈反幂函数衰减，击穿电压降低；介质损耗随着温度的升高而增大，在高温区出现小幅度的下降；随着 温度的升高，局部放电次数升高，最大放电量逐渐减小。 关键词：温度；绝缘寿命；击穿电压；介质损耗；局部放电 中图分类号：TM245 文献标志码：A 文章编号：1009-9239（2013 ）06-0066-05 Effect of Temperature on the Insulating Properties of Magnet Wire for Inverter-fed Traction Motor 1 2 Zhang Yiqiang , Luo Yang (1. Heze Power Supply Company of State Grid, Heze 274000, China; 2. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China) Abstract: To study the effect of temperature on the insulating properties of magnet wire for inverter-fed traction motor, based on a self-designed aging test device according to IEC 60851-5, the failure time and breakdown voltage of the magnet wire under different temperature were studied, and the temperature spec- trum of dielectric loss of the magnet wire was discussed. Based on a partial discharge test system, the effect of temperature on the partial discharge characteristic was investigated. The results show that with the increase of temperature, the insulation life decreases according to power function, the breakdown volt- age decreases. The dielectric loss increases with the increasing of temperature, but it decreases a little at high temperature. With the incre