摘要
PCB型Rogowski线圈克服了传统手工绕制空心线圈重复性差、准确性低的缺点,便于大规模的自动化生产。可是PCB型Rogowski线圈依靠镀通孔和焊接点实现线圈的绕制和串联连接,这种特殊的结构使得线圈的可靠性取决于镀通孔和焊接点的可靠性。为了设计高可靠性的PCB型Rogowski线圈,介绍了镀通孔的失效模式和失效机理,给出了PCB型Rogowski线圈的失效判据,建立了PCB型Rogowski线圈的可靠性框图和数学模型,基于GJB/Z 299B-98定量地推导出PCB型Rogowski线圈的失效率与线圈镀通孔数目及镜像印制板对数间的关系。最后,预计出测量300 A电流的PCB型Rogowski线圈的平均寿命约为27年。
PCB Rogowski coil overcomes the drawbacks such as poor repeatability and low accuracy of traditional handmade Rogowski coils, and is propitious to extensive automatic production. But PCB Rogowski coil is formed by interconnections of the conductive imprints on the upper and lower sides of single PCB with plated through holes as well as connections of mirrored PCB pairs in series with soldering points. This special design causes reliability of coil depending on the quality of PTH and soldering point. Thus, this paper presents the failure modes and failure mechanism of PTH, establishes the reliability model of PCB Rogowski Coil, deduces relational formula of the failure rate, lifetime to the number of PTH and the pairs of mirrored PCB, finally, it predicts the failure rate and lifetime of PCB Rogowski Coils for 300 A current measurement.
出处
《高压电器》
EI
CAS
CSCD
北大核心
2006年第6期421-423,427,共4页
High Voltage Apparatus
基金
科技部攻关项目(2004BA409B01-1)
关键词
ROGOWSKI线圈
印刷电路扳
镀通孔
可靠性预测
失效率
Rogowski coil
printed circuit board（PCB） plated through holes（PTH）
reliability prediction
failure rate
