High repetition rate PEA system for in-situ space charge measurement during breakdown tests
High repetition rate PEA system for in-situ space charge measurement during breakdown tests
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DOI：
10.1109/tdei.2004.1266330
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发表时间：
2004-02
影响因子：
3.1
通讯作者：
M. Fukuma;T. Maeno;K. Fukunaga;M. Nagao
中科院分区：
文献类型：
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作者：
M. Fukuma;T. Maeno;K. Fukunaga;M. Nagao
为了研究瞬态空间电荷现象，必须在高重复频率下观察空间电荷分布。我们研制了一种新的空间电荷测量系统，采用脉冲电声（PEA）方法，它可以测量每10 /spl μ/s的空间电荷分布。它采用了最新的数字化示波器模型和半导体开关。利用该系统研究了预应力对低密度聚乙烯板冲击击穿电压的影响。实验结果表明，正电荷注入是占主导地位的击穿之前，和电荷注入过程中的预应力引起的电场附近的电极的失真，并加强了后续的电荷注入由于脉冲电压。
In order to investigate transient space charge phenomena, it is essential that the space charge profile be observed at a high repetition rate. We have developed a new space charge measurement system using the pulsed electroacoustic (PEA) method, which can measure the space charge profiles every 10 /spl mu/s. It employs the most recent digitising oscilloscope model and a semiconductor switch. The effect of prestressing on impulse breakdown voltage of a low-density polyethylene sheet was investigated by using the new system. Experimental results suggest that positive charge injection was dominant immediately before the breakdown, and charge injection during the prestressing causes distortion of the electric field near the electrode, and enhances the subsequent charge injection due to the impulse voltage.