Dejan Poljanec (Author), Mitjan Kalin (Author), Ludvik Kumar (Author)

Abstract

Sliding electrical contacts are used in devices for the conduction of electrical power or the electrical signals between stationary and moving parts. The most widely used electrical-sliding system is still the conventional slip ring and brush assembly. In the last decade, the lifetime of ring-brush contacts was extended through the use of better contact-material combinations and design improvements. However, the extremely rapid electrification of many more components has put severe demands on this extended lifetime. This paper presents a novel, patented design for two sliding discs that allows the use of advantageous graphite/graphite contacts. In the literature there is a serious lack of understanding the performance of sliding electrical contacts with graphite/graphite pairs, which depends on the key contact parameters, as well as the influence and potential of the different available graphite materials. The normal load, the contact velocity, the electric current, and the three self-mated graphite contacts, i.e., hard carbon, electrographite and polymer-bonded graphite, were investigated. The results indicate that the contact conditions influence the performance, which is also very dependent on the graphite materials. The polymer-bonded graphite showed the best results in this study.

Keywords

sliding electrical contacts;slip-ring;graphite;friction;wear;electric current;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 539.92:621.8(045)
COBISS: 16085019 Link will open in a new window
ISSN: 0043-1648
Views: 747
Downloads: 168
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Other data

Secondary language: Slovenian
Secondary keywords: drsni električni kontakti;drsni obroči;grafit;trenje;obraba;električni tok;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2022-07-31
Pages: str. 75-83
Issue: ǂVol. ǂ406-407
Chronology: Jul. 2018
ID: 11053087