Slip Ring Rotor Winding

This has to do with the windings on the rotor and the use of slip rings.

Slip ring rotor winding.

What is a slip ring induction motor. Each slip ring is connected to one of the three phases of rotor windings. Name one disadvantage of slip ring induction motor and squirrel cage induction motor. As it names wound rotor the rotor is wound with a 3 phase windings.

As the motor accelerates. Also rotor windings are connected through slip rings to external resistance. Construction the construction of the slip ring motor is more complicated than the squirrel cage. Bar straps or wires are used for winding.

A wound rotor motor uses three slip rings typically made of copper or a copper alloy mounted to but insulated from the motor shaft. For ease of understanding instead of the current 24 slots winding let s use a 12 slot winding. 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.

Each phase of winding is connected with the slip ring. Adjusting the resistance allows control of the speed torque characteristic of the motor. A motor with a wound type rotor is known as a slip ring induction motor. A large number of rotor turns will increase the secondary voltages and reduce the current that flows through slip rings.

The slip ring brushes made of graphite are connected to a resistive device such as a rheostat. Instead of bars in this motor three windings are used. However the rotor construction of the slip ring motor is quite interesting. Let s see how the slip ring rotor does it.

These slip rings are insulated from the rotor shaft. Rotor the rotor of a squirrel cage motor is a set of bars which are short circuited by end rings.