Numerical study on current and thermal distributions of electrical contacts by FEM

K. Koibuchi, K. Sawa
{"title":"Numerical study on current and thermal distributions of electrical contacts by FEM","authors":"K. Koibuchi, K. Sawa","doi":"10.1109/HOLM.2007.4318228","DOIUrl":null,"url":null,"abstract":"Accurate determinations of contact resistance (which contains constriction and film resistance) and temperature rise are most conventional and important issues of electric conduction devices. This paper investigates coupled analysis of current and thermal distributions of Ag electrode by FEM. Intended final results are to obtain constriction resistance and temperature values. Contact areas (a-spot) of spherical and flat shaped Ag electrodes are discretized to a large number of narrow finite elements. Firstly, current density distributions in each element are calculated by FEM, and contact resistance values are obtained from the impressed current and electric potential difference between the anode and cathode. Compared with the theoretical results by R. Holm's equation for constriction resistance, calculated contact resistance values of several a-spot radii show fine agreement. Local Joule heat distributions are also obtained. Moreover, thermal distributions in the electrodes are shown as the calculated results. As a quantitative verification, tendency of maximum temperature of the calculated results shows good agreement with phi-thetas theory by R. Holm.","PeriodicalId":11624,"journal":{"name":"Electrical Contacts - 2007 Proceedings of the 53rd IEEE Holm Conference on Electrical Contacts","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2007-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrical Contacts - 2007 Proceedings of the 53rd IEEE Holm Conference on Electrical Contacts","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/HOLM.2007.4318228","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3

Abstract

Accurate determinations of contact resistance (which contains constriction and film resistance) and temperature rise are most conventional and important issues of electric conduction devices. This paper investigates coupled analysis of current and thermal distributions of Ag electrode by FEM. Intended final results are to obtain constriction resistance and temperature values. Contact areas (a-spot) of spherical and flat shaped Ag electrodes are discretized to a large number of narrow finite elements. Firstly, current density distributions in each element are calculated by FEM, and contact resistance values are obtained from the impressed current and electric potential difference between the anode and cathode. Compared with the theoretical results by R. Holm's equation for constriction resistance, calculated contact resistance values of several a-spot radii show fine agreement. Local Joule heat distributions are also obtained. Moreover, thermal distributions in the electrodes are shown as the calculated results. As a quantitative verification, tendency of maximum temperature of the calculated results shows good agreement with phi-thetas theory by R. Holm.
电触点电流和热分布的有限元数值研究
准确测定接触电阻(包括收缩电阻和薄膜电阻)和温升是导电器件中最传统和最重要的问题。本文采用有限元法对银电极的电流分布和热分布进行了耦合分析。预期的最终结果是获得收缩阻力和温度值。将球形和扁平银电极的接触区域(a点)离散为大量的窄单元。首先,采用有限元法计算了各元件的电流密度分布,并根据阳极和阴极的外加电流和电位差计算了接触电阻值。与R. Holm收缩阻力方程的理论计算结果相比,计算得到的几个a点半径的接触电阻值具有较好的一致性。局部焦耳热分布也得到了。计算结果显示了电极内的热分布。作为定量验证,计算结果的最高温度趋势与R. Holm的phi-theta理论符合得很好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信