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Application of Induction Motor

Published on 24/2/2012 & updated on 25/8/2018
Application of Induction Motor differ by the type of rotor which is being used
  1. Squirrel Cage Rotor
  2. Slip Ring Rotor or Wound Rotor Type

Squirrel Cage Rotor

Squirrel type rotor has a cylindrical laminated core with slot parallel to the shaft, uninsulated conductor bar of aluminium or copper in each slot of the rotor and the rotor conductor are short-circuited by heavy end ring at the end of the rotor.

The end ring and the conductor bar looks same as a cage of squirrel so it is named as squirrel cage rotor. Squirrel cage rotor have high efficiency and high power factor, require less maintenance and is cheap. squirrel cage rotor

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Application of Induction Motor

The Torque Slip characterstics determines the use of squirrel cage motor which is stated as under, torque slip characterstics of induction motor Generally it is classified into four class :-

Slip Ring Rotor

Slip Ring Rotor consists of sloted armature, Insulated conductor arranged in slots forming three phase double layer distribution winding similar to that of the stator winding. Rotor is star connected and the open ends of the rotor is connected with brushes to slip ring mounted in the shaft whereas the other end of slip ring is connected to variable resistor which is totally used for speed control purpose as stated in the below diagram, slip ring inductor motor Slip ring inductor motor have High Starting Torque and low starting current so the load which require this operational condition uses slip ring type rotor induction motor. Ex :- Conveyors, Cranes, Compressors, Elevators, Hoist etc.

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