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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Space charge and external circuit current measurements in LDPE films during breakdown tests
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Space charge and external circuit current measurements in LDPE films during breakdown tests

机译：击穿测试期间LDPE膜中的空间电荷和外部电路电流测量

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Space charge dynamics in low density polyethylene films were observed by the pulsed electroacoustic (PEA) method throughout breakdown tests at various temperatures. To clarify the relationship between space charge and breakdown, we developed a PEA system with a current measurement unit. The applied voltage was increased up to 300 kV mm(-1) in 150 ms to investigate a short time breakdown. Space charge profiles were measured at I ins intervals, and the external current was simultaneously measured. A significant positive charge propagating into the specimen was observed immediately before the breakdown at 90degreesC. These measurements revealed that the positive charge behaviour is strongly related to the breakdown. [References: 4]
机译：在各种温度下的整个击穿试验中，通过脉冲电声（PEA）方法观察到低密度聚乙烯薄膜中的空间电荷动力学。为了阐明空间电荷与击穿之间的关系，我们开发了带有电流测量单元的PEA系统。在150 ms内将施加的电压提高到300 kV mm（-1），以研究短时击穿。以I ins间隔测量空间电荷分布，并同时测量外部电流。在90℃击穿之前，立即观察到明显的正电荷在样品中传播。这些测量表明，正电荷行为与击穿密切相关。 [参考：4]

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