Electrical Machines
The damper windings also called the squirrel cage windings or damper grids

  are provided on the stator for improving power factor.
  consists of short-circuited copper bars embedded in the field pole faces.
  are provided in a synchronous motor to make it self starting.
  both (A) and (B).

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Electrical Machines
DC Motor

  dc compound motor.
  dc shunt with armature resistance control.
  dc series motor.
  dc shunt motor with field weakening.

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