An induction electric motor or 3 phase induction motor is an AC electric motor in which the electric energy in the rotor had a need to generate torque is obtained by Three Phase Motor electromagnetic induction from the magnetic field of the stator winding

An induction engine which connects with a 3-stage supply called 3-phase induction motor. Example followers,blowers, cranes,traction .It is a ac motor. The primary drawback of DC motors is the existence of commutator and brushes, which require regular maintenance and we can not use DC engine in explosive and dirty environment. But induction motors are cheaper,durable,lighter,smaller,require less maintenance and will use in filthy and explosive environment. Slide s may be the imp aspect in this kind of motor.

There are 2 types of IM.

Squirrel cage IM

Slip ring IM

There are many 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 swiftness control technique of induction electric motor is important

Pole changing

Stator voltage control

V/f control

Slip power recovery

Rotor resistance control