2017 IEEE Holm Conference on Electrical Contacts最新文献_第4页

Third bodies in electrical contacts — Wear and electrical performance 电触点用第三体。磨损和电气性能

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088073

Jian Song, Vitali Schinow, Haomiao Yuan

{"title":"Third bodies in electrical contacts — Wear and electrical performance","authors":"Jian Song, Vitali Schinow, Haomiao Yuan","doi":"10.1109/HOLM.2017.8088073","DOIUrl":"https://doi.org/10.1109/HOLM.2017.8088073","url":null,"abstract":"Silver is a widely used protective coating material in electrical connectors, since it has good resistance to oxidation and thus is not affected by corrosion and fretting corrosion. The dominating mechanism for failure in silver coated electrical contacts is fretting wear. Recently, wear between silver-silver contacts has been analyzed and adhesion is recognized as the dominating mechanism during the wear process. According to our experiments, the distribution of third bodies in the contact area also has great influence on the lifetime of electrical contacts, since it can greatly influence the condition of contact surfaces. In this paper, two arrangements of samples, namely \"sphere on plate\" and \"plate on sphere\" are used to generate different distribution of third bodies. Depending on the arrangement of electrical contacts, the amount of remaining debris in the contact area produced by fretting of electrical contacts varies largely. As a result, should a large amount of debris remain in the contact area, the third bodies (the debris) change the tribological conditions significantly. This leads to a marked increase in the wear of the coating which in turn reduces the lifetime of electrical contacts considerably. A model of the mechanism of the influence of third bodies is introduced and verified by experiments. This paper provides indications for design, characterization and fretting corrosion measurements. The arrangement of samples has to be specified and \"sphere on plate\" is the more critical case.","PeriodicalId":354484,"journal":{"name":"2017 IEEE Holm Conference on Electrical Contacts","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130769334","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: 6

Fretting wear of low current electrical contacts: Quantification of electrical endurance 小电流电触点的微动磨损:电耐久性的量化

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088056

S. Fouvry, J. Laporte, O. Perrinet, P. Jedrzejczyk, O. Graton, O. Alquier, J. Sautel

{"title":"Fretting wear of low current electrical contacts: Quantification of electrical endurance","authors":"S. Fouvry, J. Laporte, O. Perrinet, P. Jedrzejczyk, O. Graton, O. Alquier, J. Sautel","doi":"10.1109/HOLM.2017.8088056","DOIUrl":"https://doi.org/10.1109/HOLM.2017.8088056","url":null,"abstract":"In many industrial applications like automotive, aeronautics, train but also nuclear energy connectors need to maintain low stable electrical contact resistance. However, they are subject to vibrations that cause severe fretting wear damage which increases the electrical contact resistance and degrades information transmission. Fretting wear damages can induce dramatic increase of the direct current Electrical Contact Resistance (ECR) inducing the connector failure. The purpose of this paper is to expose a synthesis describing how fretting loadings but also material properties of coatings can influence the fretting DC-ECR behavior. The analysis first focuses on \"laboratory\" fretting test specifications that must be as possible representative of the pin-clip interface and sufficiently instrumented to measure fretting loading parameters such as sliding amplitude, normal loading friction energy, and ambient condition. To compare noble (Au, Ag) and non noble (Sn) coatings, an ECR endurance variable is introduced so that N(fretting cycle) = Nc when ΔR> ΔRc = 4mΩ. This synthesis exposed how the sliding condition from small partial slip to large gross slip sliding influences from infinite to finite Nc endurances. Then focusing on the gross slip finite endurances, different formulations are introduced to quantify the effect of fretting sliding amplitude, normal force, material properties but also coating thickness. Focusing on Ag/Ag interface, this research demonstrates that the ECR endurance is controlled by the fretting wear rate of the contact. This investigation also underlines how the application of sequential large reciprocatings can increase the fretting ECR endurance through a refilling process of fretting scar with silver transferred from the outer part of the lateral reciprocating track.","PeriodicalId":354484,"journal":{"name":"2017 IEEE Holm Conference on Electrical Contacts","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123189072","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: 10

Arcing fault in aircraft distribution network 飞机配电网电弧故障

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088106

Jonathan Andrea, M. Buffo, E. Guillard, R. Landfried, R. Boukadoum, P. Teste

引用次数: 17

Study of the influence of permanent magnets in the interruption process of the electrical arc in MCB 永磁体对微型断路器电弧中断过程影响的研究

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088067

E. Galvan, J. Rodriguez

引用次数: 2

Power flux brought by an electric arc on Ag-SnO2 electrodes 电弧在Ag-SnO2电极上产生的功率通量

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088087

R. Landfried, F. Houzé, T. Leblanc, P. Teste

引用次数: 0

Investigation of arc splitters in an SF6 insulated medium voltage switchgear SF6绝缘中压开关柜分弧器的研究

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088094

B. Novák, R. Sonar, R. Sivaraj

引用次数: 0

Preliminary study on switching characteristics of silver tin oxide type contacts for capacitive load 电容负载用氧化银锡触点开关特性的初步研究

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088065

W. Ren, Jianmin Wei, Xu Zhang, F. Luo, Zhefeng Zhou, Yinghua Fu

引用次数: 3

Commutation characteristics and brush wear of DC motor at high rotation speed 直流电机高转速换相特性及电刷磨损

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088082

K. Sawa, Masayuki Isato, T. Ueno, Keisuke Nakano, K. Kondo

{"title":"Commutation characteristics and brush wear of DC motor at high rotation speed","authors":"K. Sawa, Masayuki Isato, T. Ueno, Keisuke Nakano, K. Kondo","doi":"10.1109/HOLM.2017.8088082","DOIUrl":"https://doi.org/10.1109/HOLM.2017.8088082","url":null,"abstract":"Many small-size DC commutator motors are still widely used in automobiles and other applications. In recent years, DC motors have been driven at high speed to realize small size and high-power. However, as is well-known, the commutation becomes difficult at higher speed and brush wear/erosion increases due to the commutation arc. Therefore, it is important to understand how the motor speed influences commutation phenomena, including arc duration and residual current, so the correct motor can be selected for the particular application to achieve the required reliability. In this paper as the rotation speed is changed from 1000 to 5000min−1, the influence of the speed on commutation characteristics is investigated, such as effective commutation period, arc duration and others. In addition, it is also examined how the rotation speed affects brush wear/erosion. Consequently the followings can be made clear. The effective commutation period decreases in inverse proportion to the rotation speed, while the arc duration and residual current are almost constant, around 42μsec and 0.55A respectively up to 3000min−1. When the rotation speed increased to 3000 and 5000min−1, brush wear/erosion is found to increase rapidly. This indicates that as arc erosion increases the mechanical wear also becomes larger due to the effect of arc discharge. Based on experimental results, a model including the effect of the rotation speed is proposed for brush wear/erosion.","PeriodicalId":354484,"journal":{"name":"2017 IEEE Holm Conference on Electrical Contacts","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125135935","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: 3

Interdependency of test environment and current breaking capacity of a model vacuum switch 试验环境与真空开关断流能力的相互关系

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088097

A. Feilbach, H. Menne, V. Hinrichsen, U. Hauf, M. Heilmaier, M. Böning, F. Müller

{"title":"Interdependency of test environment and current breaking capacity of a model vacuum switch","authors":"A. Feilbach, H. Menne, V. Hinrichsen, U. Hauf, M. Heilmaier, M. Böning, F. Müller","doi":"10.1109/HOLM.2017.8088097","DOIUrl":"https://doi.org/10.1109/HOLM.2017.8088097","url":null,"abstract":"In contact material development it is elementary to have a fundamental understanding of the effects of the test environment on the switching performance. However, the complexity of those dependencies make it difficult to identify a definite cause-effect relationship between contact material and switching properties, especially if the effect of small variations in the contact material, such as the particle distribution and the morphology, shall be investigated. This paper sensitizes to the strong interdependencies of test conditions and current breaking capacity. To identify these dependencies the test environment was systematically modified. The modifications could reproducibly be correlated with their effect on the test results. In particular, the topology of the high current circuit and the contact bolt design showed strong effects. The circuit topology was optimized for reduction of the magnetic flux density within the contact gap, and it was standardized to ensure long-term reproducibility of future results. The modifications of the test circuit could also be recognized in the characteristic arcing voltage.","PeriodicalId":354484,"journal":{"name":"2017 IEEE Holm Conference on Electrical Contacts","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126572398","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

Influence of sealed gas and its pressure on arc discharge in electromagnetic contactor 密封气体及其压力对电磁接触器电弧放电的影响

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI: 10.1109/HOLM.2017.8088093

Kiyoshi Yoshida, K. Sawa, Kenji Suzuki, K. Takaya

引用次数: 6