Arrangement of Squirrel Cage Motor | Electrical Machine Theory | Electrical Knowledge Theory !!!
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Construction of squirrel cage rotor is shown in below image 👇👇
Squirrel cage induction motor have a laminated cylindrical core which have a parallel slots on its outer periphery and copper or aluminum bars are placed in the rotor slots.
All the copper or aluminum bars are permanently short at the end using conducting copper ring which is also called end ring. So that's type of rotor is called squirrel cage motor.
All the bars are shorted permanently to each other by end ring, so this type of rotor is also called short circulated rotor. Upper image shows the construction of squirrel cage rotor.
The schematic arrangement of Squirrel cage rotor is shown in below image.
Here, Current induced in the rotor by transformer action which is done by stator, so here rotor is not be connected electrically.
The induction motor which used squirrel cage type rotor is called squirrel cage induction motor.
Most of the cases squirrel cage induction rotor is used in three phase induction motor, because construction of this type rotor is very simple and also assembly of brush and slip ring is not required.
Advantages Of Squirrel Cage Induction Motor
- Construction of this type of motor is simple.
- Assembly of brush and slip ring is not required.
Disadvantages Of Squirrel Cage Induction Motor
- Starting torque is less.
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