An induction motor or 3 stage 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 electric motor which connects with a 3-phase supply called 3-phase induction motor. Example enthusiasts,blowers, cranes,traction .It really is a ac motor. The main drawback of DC motors may be the existence of commutator and brushes, which require frequent maintenance and we can not use DC electric motor in explosive and dirty environment. But induction motors are cheaper,tough,lighter,smaller,require less maintenance and will use in dirty and explosive environment. Slide 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 Three Phase Motor 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 swiftness control technique of induction engine is important
Pole changing
Stator voltage control
V/f control
Slip power recovery
Rotor resistance control