摘要
金属化膜脉冲电容器的“自愈”性使其失效数据短时内很难得到。故在分析电容器失效机理的基础上给出其耗损失效模型,推导出失效概率密度及分布函数,用电容器的性能衰退数据分析其可靠性。在估计形状参数和尺度参数分别为0.3817、23.12时确定失效模型后可求得充放电10000次的可靠度为0.9881,预计充放电寿命为23120次。用该可靠性模型分析可节约试验成本。
Metallized film pulse capacitor is a key component of inertial confinement laser fusion facility, Reliability of capacitors affects operational reliability and maintenance expenses of the entire system. For the high reliability capacitors, it is difficult to assess the reliability by using the traditional time-to-failure analysis method. By analyzing degradation mechanism of the metallized film capacitors, a degradation failure model in which parameters can be estimated from decreasing of capacitance in capacitors is presented in this paper. The estimation values of the parameters in the model are 0. 3817 and 23. 12, respectively. Both the failure probability density function （PDF） and the cumulative distribution function {CDF） can also be derived from this model, Based on the estimation values and the PDF/CDF, the life reliability of the metallized film capacitors is obtained. According to our reliability model, the probability of the capacitors after being undergone 10000 times of recharge and discharge is 0. 9881, the predicted lifetime of the capacitors is 23120（ times）.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2006年第3期62-64,共3页
High Voltage Engineering
基金
国家863计划项目资助课题(2004AA845023)
关键词
可靠性
退化失效
金属化膜脉冲电容器
惯性约束聚变
reliability
degradation failure
metallized-film pulse capacitor
inertial confinement fusion（ICF）
