What is squirrel cage rotor

  • In this type of rotor, the rotor drum is provided with a number of circular holes, which are parallel to the shaft.
  • Solid copper or aluminium bars are placed in these holes and all bars are welded to the two end rings to establish bars electrical contact between them.
  • The bars and the end rings together look like a cage and hence such a rotor is called cage rotor or squirrel, Cage rotor.
  • Due to short-circuiting of bars through end rings, rotor terminals are not accessible to the user.
  • So no external connection can be made to the cage type rotor, therefore it is not possible to connect external resistance to the rotor.
Squirrel cage rotor

Squirrel cage rotor

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