Slip Ring Rotor Winding

What is a slip ring induction motor.

Slip ring rotor winding.

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. Name one disadvantage of slip ring induction motor and squirrel cage induction motor. As for the slip ring motor the rotor has the same winding as the stator.

However the rotor construction of the slip ring motor is quite interesting. The disadvantages are high copper losses and the low torque. The slip ring brushes made of graphite are connected to a resistive device such as a rheostat. Let s see how the slip ring rotor does it.

For ease of understanding instead of the current 24 slots winding let s use a 12 slot winding. This has to do with the windings on the rotor and the use of slip rings. Each slip ring is connected to one of the three phases of rotor windings. Rotor the rotor of a squirrel cage motor is a set of bars which are short circuited by end rings.

Adjusting the resistance allows control of the speed torque characteristic of the motor. Bar straps or wires are used for winding. Construction the construction of the slip ring motor is more complicated than the squirrel cage. A large number of rotor turns will increase the secondary voltages and reduce the current that flows through slip rings.

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. Wound rotor motors can be started with low inrush current by inserting high resistance into the rotor circuit. Instead of bars in this motor three windings are used. As it names wound rotor the rotor is wound with a 3 phase windings.

A wound rotor motor uses three slip rings typically made of copper or a copper alloy mounted to but insulated from the motor shaft. Also rotor windings are connected through slip rings to external resistance.