Effects of lubricant oil on sliding contact phenomena in carbon brush-slip ring system

Sliding contact systems are widely used as a method of exchanging electrical power and/or signal between static and moving components. Considerable challenges remain regarding the need for improving the service life and reliability of these systems. The sliding characteristics of C-brushes and Cu-rings have been thoroughly investigated; however, lubricated C-brush and Cu- sliding contact systems have received comparatively little attention. In this work lubricants are shown to influence contact resistance of slip ring-brush system.