An induction engine or 3 stage induction motor can be an AC electric engine in which the electric energy in the rotor needed to generate torque is obtained by electromagnetic induction from the magnetic field of the stator winding

An induction motor which connects with a 3-stage supply called 3-phase induction motor. Example followers,blowers, cranes,traction .It is a ac engine. The main drawback of DC motors may be the presence of commutator and brushes, which require regular maintenance and we can not use DC engine in explosive and filthy environment. But induction motors are cheaper,rugged,lighter,smaller,require less maintenance and may use in filthy and explosive environment. Slide s is the imp factor 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 acceleration control technique of induction electric motor is important

Pole changing

Stator voltage control

V/f control

Slip power Three Phase Motor recovery

Rotor resistance control