An induction engine which connects with a 3-phase supply called 3-phase induction motor. Example enthusiasts,blowers, cranes,traction .It is a ac engine. The main drawback of DC three phase ac induction motor china motors is the existence of commutator and brushes, which require frequent maintenance and we can 
not use DC engine in explosive and filthy environment. But induction motors are cheaper,tough,lighter,smaller,require less maintenance and may use in dirty and explosive environment. Slide s may be the imp factor 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 reverse voltage braking
Dynamic braking
But one thing quickness control technique of induction motor is important
Pole changing
Stator voltage control
V/f control
Slip power recovery
Rotor resistance control