Slip Ring Rotor Winding

What is a slip ring induction motor.

Slip ring rotor winding.

Rotor the rotor of a squirrel cage motor is a set of bars which are short circuited by end rings. These slip rings are insulated from the rotor shaft. The slip ring brushes made of graphite are connected to a resistive device such as a rheostat. Construction the construction of the slip ring motor is more complicated than the squirrel cage.

Also rotor windings are connected through slip rings to external resistance. Wound rotor motors can be started with low inrush current by inserting high resistance into the rotor circuit. This has to do with the windings on the rotor and the use of slip rings. A wound rotor motor uses three slip rings typically made of copper or a copper alloy mounted to but insulated from the motor shaft.

Adjusting the resistance allows control of the speed torque characteristic of the motor. Bar straps or wires are used for winding. A large number of rotor turns will increase the secondary voltages and reduce the current that flows through slip rings. For ease of understanding instead of the current 24 slots winding let s use a 12 slot winding.

Let s see how the slip ring rotor does it. The disadvantages are high copper losses and the low torque. As for the slip ring motor the rotor has the same winding as the stator. Name one disadvantage of slip ring induction motor and squirrel cage induction motor.

Instead of bars in this motor three windings are used. A wound rotor motor also known as slip ring rotor motor is a type of induction motor where the rotor windings are connected through slip rings to external resistance. As the motor accelerates. Each phase of winding is connected with the slip ring.

A motor with a wound type rotor is known as a slip ring induction motor. As it names wound rotor the rotor is wound with a 3 phase windings.