Damper windings and induction motor working principle

Question

Accepted Answer

Damper windings are used in induction motors to provide starting torque and improve motor performance.

Damper windings are short-circuited conductors placed in the slots of the rotor of an induction motor.
They are made of copper or aluminum and are connected to the rotor bars.
The purpose of damper windings is to provide starting torque and improve the motor's performance.
When the motor is started, the rotating magnetic field induces currents in the damper windings, creating a magnetic field that interacts with the stator's magnetic field.
This interaction produces torque, which helps the motor to start and accelerate.
Damper windings also help to reduce the slip of the motor, improving its efficiency and power factor.
They are commonly used in high-power induction motors, such as those used in industrial applications.
Example: In a crane motor, damper windings are used to provide the necessary starting torque to lift heavy loads.

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