电压反峰对脉冲电容器寿命特性的影响

以金属化聚丙烯膜电容器电压反峰为研究对象，探讨了脉冲电流对电容器寿命的影响机制，通过对电容器在不同电压反峰系数下进行寿命测试，研究了电压反峰系数与电容器寿命之间的关系。研究结果表明：当电压反峰系数在10%～65%时，电容器寿命成指数下降。基于试验结果，通过统计分析的方法，拟合出寿命随电压反峰系数变化的经验公式，可以用来预测不同反峰系数下金属化聚丙烯膜电容器的寿命特性。

Effect of reverse voltage on lifetime performance of pulsed capacitors

Metallized polypropylene film capacitors (MPPFCs) are key components in pulsed power systems. This paper mainly concentrates on the effect of the reverse voltage on the lifetime performance. Firstly the effect of discharge current on the lifetime performance of capacitors is introduced. Secondly experiment is designed to investigate the lifetime under different voltage reversal coefficients (). The results indicate that the lifetime is extremely sensitive to in the range of 9.4% to 65%, and the lifetime of MPPFCs decreases with in index. Based on the experimental results, an empirically derived life-scaling equation is given by statistical analysis, which can predict the lifetime of MPPFCs under different .