three phase ac induction motor

An induction motor which three phase ac induction motor china connects with a 3-phase supply called 3-phase induction motor. Example supporters,blowers, cranes,traction .It 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’t use DC motor 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 type of motor.

There are 2 types of IM.

Squirrel cage IM
Slip ring IM
There are various 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 motor is important

Pole changing
Stator voltage control
V/f control
Slip power recovery
Rotor resistance control