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Squirrel Cage motor is a kind of Induction Motor. The reason an induction motor sometimes refered to a rotating transformer is because the stator (Primary windings in a transformer), which is powered to set up a magnetic field induces a current in the armature coils (secondar coils in a transformer). However, instead of giving an electrical power output, the coil is short circuited to produce mechanical output (torque in this case)

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Q: Why short circuiting rings are used in squirrel cage motor?
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If there is an extra winding called the "damper winding" in addition to the field winding.Then the synchronous motor will operate as a squirrel cage induction motor.Whats is a damper winding ?A damper winding is made up of copper bars which are placed in the slots in the pole faces of the rotor.These are short circuited with the help of end rings in a squirrel cage induction motor.


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