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