Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238)最新文献_第2页

The effect of microstructure on the electrical performance of Ag-WC-C contact materials 微观结构对Ag-WC-C触点材料电性能的影响

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722456

S. Allen, E. Streicher

引用次数: 17

Stress relaxation of aluminum wire conductors 铝线导体的应力松弛

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722452

M. Braunovic

引用次数: 1

Concerning reliability modeling of connectors 关于连接器的可靠性建模

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722428

R. Mroczkowski

{"title":"Concerning reliability modeling of connectors","authors":"R. Mroczkowski","doi":"10.1109/HOLM.1998.722428","DOIUrl":"https://doi.org/10.1109/HOLM.1998.722428","url":null,"abstract":"A Physics of Failure approach provides a basis for modeling of connector degradation mechanisms. Such a modeling capability can be realized, with differing levels of complexity, for many important connector degradation mechanisms. However, extension of this modeling capability to modeling of connector reliability is far more complicated and, in fact, questionable. Reliability modeling of connectors requires knowledge of the relationship between degradation mechanisms and connector performance parameters such as contact resistance. The required relationships, however, are not straightforward in that some of the key parameters are design and application dependent. This dependence makes a general reliability modeling approach difficult at best. This paper highlights some of these design/application dependencies in terms of a proposed general model of contact resistance degradation and, therefore, contact reliability modeling. The conclusion reached is that, at this point, connector modeling has its major value in identifying and \"quantifying\" laboratory exposure environments and procedures directed towards assessing connector reliability empirically.","PeriodicalId":371014,"journal":{"name":"Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122103878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

The finite-element model and analysis of static contact resistance and thermal process for contact with film 薄膜接触的静态接触电阻和热过程的有限元模型与分析

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722450

Li Kui, Su Xiuping, L. Zhigang, Lu Jianguo, Z. Guan-sheng

引用次数: 8

Investigation of arcing effects during contact blow open process 接触吹开过程中电弧效应的研究

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/6144.846764

X. Zhou, P. Theisen

{"title":"Investigation of arcing effects during contact blow open process","authors":"X. Zhou, P. Theisen","doi":"10.1109/6144.846764","DOIUrl":"https://doi.org/10.1109/6144.846764","url":null,"abstract":"A theoretical model has been developed to simulate the blow open process considering contact constriction force, contact spring force, and plasma pressure. Meanwhile, monochromatic high speed imaging technique has been used to characterize arc behavior, contact vapor distribution and determine contact blow open gaps. Modeling results are in good agreement with test results. The results show that plasma pressure has a significant effect at the initial arcing stage of a blow open process, but it decreases rapidly due to the increase of arc gap and the gas pressure equilibrium around moving contacts. The plasma pressure and the contact spring force (or applied magnetic force) basically determine the arcing time during the blow open process. However, contacts can be held open by plasma pressure till current zero if piston type arc chamber is employed. Higher contact spring force results in shorter arcing time, higher arcing current and more likely leads to contact weld. Due to the fact of arc pressure decreasing rapidly during the blow open process, the blow open contact gap is less than 2.5 mm for all the contactors tested at the blow open current level. The results indicate that larger allowed arc gap does not necessarily reduce contact weld possibility, since other factors such as arc motion and heat conduction through contacts also have strong influence on contact weld.","PeriodicalId":371014,"journal":{"name":"Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238)","volume":"11 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134620814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Contact physics of gold microcontacts for MEMS switches MEMS开关用金微触点的接触物理

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/6144.796533

D. Hyman, M. Mehregany

引用次数: 290

Arc structure, arc motion and gas pressure between laterally enclosed arc runners 电弧结构、电弧运动及横向封闭电弧流道间的气体压力

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/6144.946476

P. Zeller, W. Rieder

{"title":"Arc structure, arc motion and gas pressure between laterally enclosed arc runners","authors":"P. Zeller, W. Rieder","doi":"10.1109/6144.946476","DOIUrl":"https://doi.org/10.1109/6144.946476","url":null,"abstract":"Arc motion along parallel arc runners tightly enclosed by lateral walls was investigated experimentally, both with and without an exhaust barrier at the outlet. High speed movies (33000 frames/s) were taken and the gas pressure was measured at several locations along the path of arc motion. The measurements show how both arc shape and motion depend on the parameters arc length (5-15 mm), arc current (1-5 kA), magnetic blast field (40-100 mT), and exhaust constriction. In many cases both are shape and are motion were influenced by a plasma volume forming a \"nose\" in front of the arc next one of the electrodes. Spontaneous formation of an anode spot and/or a cathode spot in front of the arc may ignite a parallel current path and initiate a commutation process. The plasma volume in front of the arc is less significant at low electrode distance, high arc current, high blast field, and in more realistic chamber geometries with an exhaust barrier. Cold gas shock waves hitting the arc strongly influence both arc motion and shape. Simulation of arc motion may be a helpful tool in order to save expensive experiments when designing low voltage miniature circuit breakers. The high speed movies showed that the arc motion is sometimes strongly influenced by commutation processes requiring a very complex arc model.","PeriodicalId":371014,"journal":{"name":"Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133724199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Adjustment state and quasisteady state of structure and composition of AgMeO contacts by breaking arcs 断弧AgMeO触点结构和组成的调整状态和准稳态

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722446

J. Wan, Ji-gao Zhang, Mingcong Rong

引用次数: 10

Nickel matrix composite electrocoatings as stationary electrical contacts 镍基复合电镀层作为固定电触点

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722440

C. Dervos, C. Kollia, S. Psarrou, P. Vassiliou, N. Spyrellis

{"title":"Nickel matrix composite electrocoatings as stationary electrical contacts","authors":"C. Dervos, C. Kollia, S. Psarrou, P. Vassiliou, N. Spyrellis","doi":"10.1109/HOLM.1998.722440","DOIUrl":"https://doi.org/10.1109/HOLM.1998.722440","url":null,"abstract":"The electrical contact characteristics are dominated by the interfacial transport processes, thermal generation and dissipation rates, mechanical fatigue during the operations, material phase transitions and migration effects as a result of transient phenomena during arcing. The work presented in this paper explores the possibility of using as electrical contacts composite nickel matrix electrodeposits prepared under direct current (DC) and pulse current (PC) conditions. The codeposition of liquid-containing microcapsules (/spl mu/caps) along with the metal matrix from electrolytic baths leads to the development of a totally new type of material, the liquid-containing metal electrocoating with prespecified properties. The incorporation of oil-containing polymeric wall /spl mu/caps in the nickel matrix ensures a self-lubrication-cooling action during fretting or transient operation. The electrical properties of composite nickel electrodeposits have been investigated for possible utilization as electrical contacts. Different preparation conditions have been employed. Their contact resistance and interfacial temperature for a great number of operation cycles have been monitored under constant axial contact force using low current excitations. SEM and XRD analysis were applied for the inter-electrode surfaces for investigating their structural characteristics.","PeriodicalId":371014,"journal":{"name":"Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124442373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of compounds in airborne dust collected in Beijing 北京地区空气中粉尘成分分析

Electrical Contacts - 1998. Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts (Cat. No.98CB36238) Pub Date : 1998-10-26 DOI: 10.1109/HOLM.1998.722442

Ji-gao Zhang, Yaqi Liang, J. Wan, Bai-Sheng Sun

引用次数: 12