| Failure analysis of a kind of low power connector |
| |
| 作者姓名： | ZHOU Yi-lin ZENG Ning XU Liang-jun JORGENS Stefan |
| |
| 作者单位： | Lumberg Connect |
| |
| 摘 要： | A kind of low power connector used e.g. in household appliances was partly burned in routine experiment. The heat sources were four paralleled contacts constructed by springs (Sn/CuSn-alloy) in socket and a plug sheet (Ni/Steel) while mating. The contact interfaces were detected by scanning electronic microscope (SEM) and X-ray energy dispersive spectros- copy (XEDS), obvious wear tracks and various contaminants, including element Si, Al, Na, K, S, Cl, O, etc., were found. The contamination degrees on the four paralleled contacts were different, so that the ratio of average contact resistance on the four contacts was about 5:8:3:1. The maximum contact resistance on contacts of the plug sheet reached 28 ?. The main failure rea- sons were fretting and contamination between the contact interfaces. Fretting simulation showed that connection resistance of connectors was raised up, even to ohms level. When the current increased to 5 A, the socket housing was heated and decom- posed. By the thermal analysis, it was estimated that the connector would be burned under the lower current if the current was not evenly distributed on the four paralleled contacts caused by uneven contamination. Improvement methods for connector failure are also discussed.
|
| 关 键 词： | 连接器 热量流失 低功率电器 磨损量 |
| 收稿时间： | 2006-12-19 |
| 修稿时间： | 2007-01-05 |
Failure analysis of a kind of low power connector |
| |
| ZHOU Yi-lin ZENG Ning XU Liang-jun JORGENS Stefan.Failure analysis of a kind of low power connector[J].Journal of Zhejiang University Science,2007,8(3):384-392. |
| |
| Authors: | Zhou Yi-lin Zeng Ning Xu Liang-jun Jörgens Stefan |
| |
| Institution: | (1) Research Lab of Electric Contacts, Beijing University of Posts & Telecommunications, Beijing, 100876, China;(2) Lumberg Connect GmbH & Co. KG, Schalksmühle, 58579, Germany |
| |
| Abstract: | A kind of low power connector used e.g. in household appliances was partly burned in routine experiment. The heat sources were four paralleled contacts constructed by springs (Sn/CuSn-alloy) in socket and a plug sheet (Ni/Steel) while mating. The contact interfaces were detected by scanning electronic microscope (SEM) and X-ray energy dispersive spectroscopy (XEDS), obvious wear tracks and various contaminants, including element Si, Al, Na, K, S, Cl, O, etc., were found. The contamination degrees on the four paralleled contacts were different, so that the ratio of average contact resistance on the four contacts was about 5:8:3:1. The maximum contact resistance on contacts of the plug sheet reached 28 Ω. The main failure reasons were fretting and contamination between the contact interfaces. Fretting simulation showed that connection resistance of connectors was raised up, even to ohms level. When the current increased to 5 A, the socket housing was heated and decomposed. By the thermal analysis, it was estimated that the connector would be burned under the lower current if the current was not evenly distributed on the four paralleled contacts caused by uneven contamination. Improvement methods for connector failure are also discussed. |
| |
| Keywords: | Connector Thermal failure Fretting Contamination |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
