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Slip Ring

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A Slip Ring is a method of making an electrical connection through a rotating assembly. Slip rings are commonly found in electrical motors, electrical generators for AC systems, and alternators in cable reels, wind turbines and packaging machinery. Slip rings are rotary couplings used to transfer electric current from a stationary unit to a rotating unit. This is achieved by either holding the center core stationary while the brushes and housing rotate around it; or holding the brushes and housing stationary while the center core rotates. Slip rings are also called rotary electrical interfaces, rotating electrical connectors, swivels, or electrical rotary joints.