An induction engine or 3 stage induction motor is an AC electric motor in which the electric energy 
in the rotor had a need to Three Phase Motor create torque is obtained by 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 supporters,blowers, cranes,traction .It is a ac engine. The main drawback of DC motors is the presence of commutator and brushes, which require frequent maintenance and we can’t use DC engine in explosive and filthy environment. But induction motors are cheaper,rugged,lighter,smaller,require less maintenance and may use in dirty and explosive environment. Slip s is the imp aspect in this type 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 invert voltage braking
Dynamic braking
But one thing rate control technique of induction motor is important
Pole changing
Stator voltage control
V/f control
Slip power recovery
Rotor resistance control
