Slip rings, also referred to as rotary joints, are electromechanical devices. They are popular in electric induction motors and several other systems that require signal transmission between fixed and rotating components. In induction motors, Slip rings mainly insert resistance, instead of conducting signals. However, these devices are designed to transmit power (electricity) or data signals from a stationary part to a rotating element. The fixed part is usually made of carbon graphite and coated with gold, silver, or other metal alloys, although this will vary depending on the application of the slip Ring. The rotating metal ring is often made