基于加速退化数据的金属化膜脉冲电容器可靠性分析  

Failure analysis of metallized film pulse capacitors based on accelerated degradation data

作　　者：赵建印[1] 孙权[1] 周经伦[1] 贺少勃[2] 魏晓峰[2] 

机构地区：[1]国防科学技术大学信息系统与管理学院系统工程系,长沙410073 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2006年第9期1495-1498,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：基于金属化膜脉冲电容器的失效机理,研究了基于加速退化数据的金属化膜脉冲电容器可靠性评估问题,给出了一个该型电容器的加速退化失效模型和参数统计推断方法。基于试验数据可求得该型电容器可靠性模型中未知参数的估计值分别为9.066 9×10-8和0.022 1,将该值代入失效分布函数即可确定电容器的失效模型,由此模型求得该型电容器充放电20 000次的可靠度为0.972 4。使用这种分析方式对金属化膜脉冲电容器进行可靠性分析将更能节省试验时间和费用。The high energy density self-healing metallized film pulse capacitor has been applied to all kinds of laser facilities for their power conditioning systems, whose reliability and expense are straightforwardly affected by the reliability level of capacitors. Reliability analysis of highly reliable devices, such as metallized film capacitors, is a challenge due to cost and time restriction. Accelerated degradation testing provides a way to predict its life cost and time effectively. A model and analysis based on accelerated degradation data of metallized film capacitors are described. Also described is a method for estimating the distribution of time to failure. The estimation values of the unknown parameters in this model are 9. 066 9 × 10^-8 and 0. 022 1, respectively. Both the failure probability density function（PDF） and the cumulative distribution function（CDF） can be presented by this degradation failure model. Based on these estimation values and the PDF/CDF, the reliability model of the metallized film capacitors is obtained. According to the reliability model, the probability of the capacitors that survive to 20 000 shots is 0. 972 4.

关 键 词：金属化膜脉冲电容器 激光装置 可靠性 加速试验 

分 类 号：TB114.3[理学—概率论与数理统计]