金属化聚丙烯膜脉冲电容器过载特性

摘要

As one of the energy storing elements of explosively-driven flux compression generators,the pulsed capacitor was required to discharge only once,such as explosively-driven flux compression generators.Therefore,it provided a possibility to make the pulsed capacitor working in overstress.Compared with the overstressing capacitor,the pulsed capacitor has several advantages,such as small volume and light weight.So it could be used as a current driver to miniaturize explosively-driven flux compression generators.The overstress characteristics of metalized polypropylene pulse capacitor (MPP capacitor)were investigated at different temperatures.Experimental results show that the energy storage density is 1.8 times of the rated energy storage density at the temperature of -45 ~60℃,and in this condition,the one-side lower confidence limit of reliability is 0.9 if the confidence level is 0.95.%脉冲电容器作为爆磁压缩激励电流源的储能元件之一，通常要求单次可靠运行。正是由于单次运行，为脉冲电容器的过载工作提供了极大的可能。过载工作的电容器与额定电容器相比具有体积小、重量轻的优点，可实现爆磁压缩激励电流源的紧凑化。研究了不同温度下国产金属化聚丙烯膜脉冲电容器的过载特性，如过载运行的储能密度，放电电流及可靠度等。实验表明：在－45℃～60℃范围内过载运行这种电容器，其储能密度可达额定储能密度的1．8倍，同时在0．95的置信水平下，其过载运行的可靠度单侧置信下限为0．9，可以实现稳定可靠运行。