About Electrical Brushes and Brush Materials
Electrical brushes and brush materials are used in conjunction with slip rings, commutators or other contact surfaces to maintain an electrical connection in rotary and linear sliding contact applications. Electrical brushes and brush materials require very good frictional characteristics combined with high to moderate conductivity. Graphite brush materials are used for high power equipment. Metal brushes or sliding contacts are used for signal or low power applications.
Electrical brushes and brush materials are made from copper graphite, amorphous carbon, graphite and flake graphic, electrographite, metal graphite, resin-bonded graphite, silver and silver alloys, silver graphite, and specialized or proprietary materials. A carbon brush is typically constructed of carbon with an amorphous structure or graphite, which is an allotropic form of carbon. A graphite brush is useful in high power or sliding contact applications because the graphite is a good lubricant and provides low friction contact. Electrical brushes and brush materials also include combining graphite with metals. A metal graphite brush, such as a copper brush combined with graphite, provides the low friction capability of graphite with the high conductivity of copper to provide reliable contact. A copper graphite brush is an expensive option, but has excellent flexural strength and high conductivity. A silver graphite molybdenum disulfide brush is the most common used in slip ring mechanisms used in aerospace applications, such as solar power arrays.
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Electric motor - Wikipedia, the free encyclopedia An electric motor uses electrical energy to produce mechanical energy, nearly always by the interaction of magnetic fields and current-carrying |
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ASTM B613 -76(2006) Standard Guide for Preparing... ASTM B613 - 76(2006) Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts See ASTM International Information |
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Abrasion¿A Factor in Electrical Brush Wear Abrasion¿A Factor in Electrical Brush Wear |
