连续方波脉冲电压下PCB绝缘可靠性的多变量威布尔失效模型

doi:10.19595/j.cnki.1000-6753.tces.180311

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Abstract Printed circuit board (PCB) is the core component of the spacecraft power supply system, and its insulation reliability directly affects the safe and stable operation of the spacecraft. For this reason, a reliability model for PCB insulation based on multi-parameter Weibull failure distributions (WFDs) is proposed. Firstly, the WFDs are used to statistically analyze the failure data of PCB under the action of electrical-thermal double stress, and the insulation characteristic failure time of PCB is obtained by the maximum likelihood estimation. Secondly, the PCB insulation reliability failure model is established through combining the exponential function (EF) and Fallou model with the standard WFDs, respectively. Finally, the behavior and mechanism of breakdown failure occurred in PCB are discussed and analyzed. The analysis shows that the occurrence and development of the electric discharge can be promoted by the temperature, electric field and the heat accumulation caused by them during PCB failure process, which accelerates the insulation degradation of PCB and reduces its insulation reliability.

Key words： Printed circuit board Weibull failure distributions exponential function Fallou model insulation reliability

Received: 12 March 2018 Published: 29 March 2019

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TM855

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	Zhou Quan
	Xiong Taotao
	Jiang Tianyan
	Wen Mingqian
	Ouyang Xi

Cite this article:

Zhou Quan,Xiong Taotao,Jiang Tianyan等. Multi-Parameter Weibull Failure Model of PCB Insulation Reliability under Continuous Square Impulse Voltage[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1310-1318.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180311 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I6/1310

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