Correlation between Space Charge Behavior and Dielectric Breakdown in Cross-linked Polyethylene under dc High Electric Field
Correlation between Space Charge Behavior and Dielectric Breakdown in Cross-linked Polyethylene under dc High Electric Field
复制标题
直流强电场下交联聚乙烯空间电荷行为与介电击穿的相关性
DOI：
10.1541/ieejfms1990.120.1_68
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发表时间：
2000
影响因子：
--
通讯作者：
T. Nakagawa
中科院分区：
文献类型：
--
作者：
T. Takeda;N. Hozumi;H. Suzuki;T. Okamoto;K. Terashima;M. Asano;T. Nakagawa
在高压直流电场作用下，用脉冲电声法测量了交联型聚乙烯中的空间电荷，直到介质击穿。用积分空间电荷分布的方法计算了块体中的局部电场。当局部电场达到最大值时没有发生介电击穿，而是在局部电场达到最大值后的一段时间内才发生击穿，这表明在局部电场达到最大值后，介电击穿强度变差。击穿强度的恶化是由于绝缘层中产生的移动载流子的增加而引起的，这些移动载流子是从阴极注入的，此时局部电场足够高。
Space Charge was measured in Cross-linked Polyethylene using pulse-electroacoustic method under a high dc electric field up to the time of dielectric breakdown. Local electric field in the bulk was calculated by integrating space charge profile. Dielectric breakdown did not occurred when the local electric field reached the maximum value but a little while after, suggesting that dielectric breakdown strength deteriorated after the local electric field reached the maximum value. The deterioration of the breakdown strength was caused by increase of mobile carriers that were generated in the insulation and were injected from cathode, where the local electric field was enough high.