An induction electric motor or 3 stage induction motor is an AC electric engine in which the electric current in the rotor needed to Three Phase Motor create torque is obtained by electromagnetic induction from the magnetic field of the stator winding

An induction electric motor which connects with a 3-stage supply called 3-phase induction motor. Example enthusiasts,blowers, cranes,traction .It really is a ac electric motor. The main drawback of DC motors is the presence of commutator and brushes, which require frequent maintenance and we can not use DC motor in explosive and filthy environment. But induction motors are cheaper,durable,lighter,smaller,require less maintenance and can use in filthy and explosive environment. Slip s is the imp element in this type of motor.

There are 2 types of IM.

Squirrel cage IM

Slip ring IM

There are various starting and braking condition.

Important starting methods are

Star-delta starter

Auto transformer starter

Ac voltage controller starter

Rotor resistance starter

Important braking methods are

Regenerative braking

Plugging or reverse voltage braking

Dynamic braking

But one thing quickness control technique of induction electric motor is important

Pole changing

Stator voltage control

V/f control

Slip power recovery

Rotor resistance control