高压电器2017，Vol.53Issue(11)：85-91,98,8.DOI:10.13296/j.1001-1609.hva.2017.11.014
8/20μs冲击电流发生器源阻抗对压敏电阻器性能表征的影响研究
Influence of Source Impedance of 8/20 μs Impulse Current Generator on the Performance Characterization of Varistor
摘要
Abstract
The effect of 8/20 μs impulse current generator with different source impedance on the impact energy of varistor was analyzed.A circuit model of 8/20 μs impulse current generator was established to conduct circuit simulation.Then,the experiment platform for 8/20 μs impulse current generator was set up to conduct impulse current test for the varistors with different specifications.The results show that the smaller the source impedance of 8/20 μs impulse current generator is,the larger the impact energy through the varistor in the same impulse current amplitude is;the higher the DC reference voltage of the varistor is,the stronger the effect of the source impedance on the impact energy is.However,with the increase of the impulse current amplitude,the effect of the source impedance on the impact energy weakens.Therefore,for the 8/20 μs impulse current test under a certain impulse current amplitude,the source impedance of the impulse current generator cannot be too small.This study may provide theoretical and engineering support for standardization of the impulse current test on varistor.关键词
冲击电流/源阻抗/压敏电阻/冲击能量Key words
impulse current/source impedance/varistor/impact energy引用本文复制引用
孙伟,李元晶,孙晋茹..8/20μs冲击电流发生器源阻抗对压敏电阻器性能表征的影响研究[J].高压电器,2017,53(11):85-91,98,8.基金项目
国家自然科学基金资助项目(51221005) （51221005）
陕西省重点科技创新团队(2012KCT-07).Project Supported by National Natural Science Foundation of China(51221005) （2012KCT-07）
Technological Innovation Team Funds of Shaanxi Province(2012KCT-07). （2012KCT-07）
