What is 3-phase induction motor?

Three-phase induction motor an induction motor is simply an electric transformer whose magnetic circuit is separated by an air gap into two relatively movable portions, one carrying the primary and the secondary winding.

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Advantages of Three-phase induction motor.

1. Reliable operation 2. Low initial cost 3. Easy operation and simple maintenance 4. High efficiency 5. Simple control gear for starting and speed control

Application of 3-induction motor.

1) They are used for loads that requires speed control. 2) Typical applications of wound rotor or slip ring induction motors are crushers, plunger pumps, cranes & hoists, elevators, compressors and conveyors.

To understand its principle we need to know its construction. It has mainly two parts:

1) Stator 2) Rotor

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