高压脉冲方波下聚酰亚胺薄膜电老化寿命模型-电工技术学报.PDF
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2009 年 3 月 电 工 技 术 学 报 Vol.24 No. 3
第24 卷第 3 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY Mar . 2009
高压脉冲方波下聚酰亚胺薄膜
电老化寿命模型
叶 强 吴广宁 张雪原 何常红 邓明丽
(西南交通大学电气工程学院 成都 6 1003 1)
摘要 逆变器输出的高压脉冲 波会导致变频调速牵引电机绝缘过早损坏,其老化机理与
工频交流电压下不同。利用一种高压脉冲绝缘老化试验系统模拟变频器对变频调速牵引电机定
子绕组绝缘的老化作用,以聚酰亚胺薄膜为试验对象,研究了脉冲 波幅值、频率对绝缘寿命
的影响,提出了高压脉冲 波下绝缘材料的电老化寿命模型。
关键词:变频电机 老化 绝缘 模型
中图分类 :TM2 15.3
Electrical Aging Lifetime Model of Polyimide Film
Under High Voltage Square Impulses
Ye Qiang Wu Guangning Zhang X uey uan H e Changhong D eng M ing li
(Southwest Jiaotong University Chengdu 6 1003 1 China)
Abstract High voltage square impulses from converter can make stator insulation of inverter-
fed motors damaged much earlier . There are many differences in insulation aging mechanism between
under continuous impulses and under sine voltages. In order to test insulation properties under
continuous impulses, a new insulation aging test system is used to simulate the aging effect of
converter on the winding insulation in the inverter-fed motors. The influences of impulse amplitude
and frequency on insulation lifetime are investigated by using polyimide film . Finally, an insulation
electrical aging lifetime model is proposed.
Keywords :Inverter-fed motors, aging, insulation, model
机的设计具有重要的理论和实际意义。
[6]
1 引言 目前的研究结果表明,局部放电 、空间电
[7] [2 ]
荷 以及介质损耗 是导致绝缘损坏的原因,变频
与直流电机相比,变频调速的交流感应电机具
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