Degradation process of silicone-gel by internal surface discharges

机译：内表面放电降解硅凝胶的过程

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Silicone gel is widely used to encapsulate power electronic circuits. It is well known that surface discharge in the module is one of the weakest points in insulation. These discharges cause the growth of cavity in silicone gel. We have observed the cavity dynamics in order to investigate the degradation process. The results indicated that streamers propagate through the gaseous phase in filamentary channels from the electrode and reaches the tip of the cavity, and leaves charges until the next discharge occurs. Moreover it was revealed that the propagation of the cavity was caused by the positive discharges. The self-healing ability of gel determined whether the propagation succeeds or not.

机译：硅胶广泛用于封装电力电子电路。众所周知，模块中的表面放电是绝缘的最薄弱点之一。这些放电会导致硅胶中空腔的生长。为了观察降解过程，我们观察了腔动力学。结果表明，拖缆从电极通过丝状通道中的气相传播并到达空腔的尖端，并留下电荷，直到发生下一次放电。此外，揭示了空腔的传播是由正放电引起的。凝胶的自愈能力决定了繁殖是否成功。

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来源
《2014 IEEE 18th International Conference on Dielectric Liquids》|2014年|1-4|共4页
会议地点 Bled(SI)
作者
Sato Masahiro; Kumada Akiko; Hidaka Kunihiko; Yamashiro Keisuke; Hayase Yuji; Takano Tetsumi;
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作者单位

Department of Electrical Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113-8656, Japan;

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原文格式 PDF
正文语种 eng
中图分类
关键词
cavity; partial discharge; power module; silicone gel; surface discharge; tree; void;

机译：腔局部放电电源模块；硅胶表面放电树;虚空;

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Degradation process of silicone-gel by internal surface discharges

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