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作 者:赵建印[1] 彭宝华[1] 孙权[1] 周经伦[1]
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
出 处:《高电压技术》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)
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).
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