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An induction engine or 3 phase induction motor can be an AC electric motor in which the electric energy in the rotor had a need to produce 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-stage induction motor. Example enthusiasts,blowers, cranes,traction .It really is a ac motor. The main drawback of DC motors may be the presence of commutator and brushes, which require regular maintenance and we can’t use DC engine in explosive and filthy environment. But induction motors are cheaper,rugged,lighter,smaller,require much less maintenance and will 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 numerous starting and Three Phase Motor 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 invert voltage braking

Dynamic braking

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

Pole changing

Stator voltage control

V/f control

Slip power recovery

Rotor resistance control