An induction motor or 3 phase induction motor is an AC electric electric motor in which the electric energy in the rotor needed 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 followers,blowers, cranes,traction .It really is a ac motor. The primary 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,durable,lighter,smaller,require less maintenance and may use in filthy and explosive environment. Slip s is the imp element in this kind of motor.
There are 2 types of IM.
Squirrel cage IM
Slip ring IM
There are numerous 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 quickness Three Phase Motor control technique of induction motor is important
Pole changing
Stator voltage control
V/f 
control
Slip power recovery
Rotor resistance control