Partial discharge control in a power electronic module using high permittivity non-linear dielectrics
Partial discharge control in a power electronic module using high permittivity non-linear dielectrics
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DOI：
10.1109/tdei.2010.5539704
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发表时间：
2010-08
影响因子：
3.1
通讯作者：
Ningyan Wang;I. Cotton;J. Robertson;S. Follmann;K. Evans;D. Newcombe
中科院分区：
文献类型：
--
作者：
Ningyan Wang;I. Cotton;J. Robertson;S. Follmann;K. Evans;D. Newcombe
基板金属化边缘的高电场可能会在电力电子模块内引起局部放电，并可能导致最终故障。本文研究了使用填充钛酸钡的有机硅凝胶来减少基板金属化边缘的电场增强，从而提高局部放电起始电压。钛酸钡填充的凝胶产生电介质，其中相对介电常数比普通凝胶增加，并且还表现出对电场的依赖性。通过使用填充凝胶可以在电力电子模块中实现理论上的电场降低，并与实验测量结果进行比较，包括在一些商业模块中对该技术的试验。随着取得了可喜的结果，还考虑了钛酸钡填料对凝胶粘度和导热率这两个关键制造问题的影响。
High electric fields at the edge of the substrate metallization can give rise to partial discharge within power electronic modules and can lead to eventual failure. This paper examines the use of silicone gels filled with barium titanate to reduce the electric field enhancement at the edge of substrate metallization and therefore increase partial discharge inception voltages. The barium titanate filled gel produces a dielectric in which the relative permittivity is increased over a plain gel and that also exhibits a dependence on electric field. The theoretical electric field reduction that can be achieved in a power electronic module through the use of filled gels is demonstrated and compared against experimental measurements including the trial of the technique in some commercial modules. As promising results are achieved, consideration is also given to the effect of the barium titanate filler on the viscosity of the gel and the thermal conductivity, two key manufacturing issues.