方波脉冲电压下聚酰亚胺薄膜降解机理(英文)

被引：2

作者：

罗杨 ^{[1
]}

吴广宁 ^{[1
]}

夏金凤 ^{[2
]}

朱光亚 ^{[1
]}

王鹏 ^{[1
]}

曹开江 ^{[1
]}

机构：

[1] School of Electrical Engineering, Southwest Jiaotong University

[2] Zhuzhou Electric Locomotive Co, Ltd, China South Locomotive & Rolling Stock Co, Ltd

来源：

高电压技术 | 2013年 / 39卷 / 08期

关键词：

inverter-fed motor; polyimide film; bipolar continuous square impulse voltage; partial discharge; aging; insulation failure; mi-; cro-morphology; degradation mechanism;

D O I：

暂无

中图分类号：

O631.3 [高聚物的化学性质];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Partial discharge (PD) under a sequence of high-repetition-rate square pulses is one of the key factors leading to premature failure of insulation systems of inverter-fed motors. Polyimide (PI) film is an important type of insulating material used in the inverter-fed motors. In this paper, micro-morphology and structure change of PI film aged by bipolar continuous square impulse voltage (BCSIV) with ampli- tude above partial discharge inception voltage (PDIV) are investigated by scanning electron microscope (SEM). The chemical bonds of PI chain are analyzed through Fourier transform infrared spectroscopy (FTIR). The results show that the degradation mechanism of PI film is the fracturing of chemical bonds caused by the erosion from PDs. Three layers are displayed in both 100 HN film and 100 CR film. The de- gradation path of PI film is initiated from surface and then gradually extends to the interior with continuous aging. Nano-fillers can retard the degradation of PI film and prolong its lifetime.

引用

页码：1925 / 1931

页数：7

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