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Slip-Ring Collector Tester

A slip ring (in electrical engineering terms) is a method of making an electrical connection through a rotating assembly. Slip rings, also called rotary electrical interfaces, rotating electrical connectors, collectors, swivels, or electrical rotary joints, are commonly found in electric motors, electrical generators for AC systems and generally in all rotary systems with electrical connections of sensors and receptors.

Two tribometer facilities for long-term tests of single slip-ring systems are available at AAC: The 1st for electro-tribological tests at room temperature on air, the 2nd for tests from -5 to +60 °C on air. With these testing facilities the performance of slip-rings with standard coatings compared with the new coatings is evaluated in order to optimize the coating type as well as the parameters for different applications of the slip-rings.

By means of the criteria wear, friction coefficient, electrical resistance and SEM/EDX post-test analysis, correlations between alloy, type of particles, coating parameters and the criteria named above can be established.

In the following picture the SRC-testing facilities developed at AAC is shown.