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A slip ring is a continuous conducting ring used in generators and motors. It allows brushes to take or deliver current to the rotor. Slip rings are essential components for transferring electrical power to or from a rotating part of a machine.1

The term "slip regulator" refers to a variable rheostat connected to the collector rings of a wound-rotor induction motor. This device is used to control the motor's speed or slip.2

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2 Britannica Sources
  1. slip ring
  2. slip regulator

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