Three Phase Motor

An induction motor or 3 phase induction motor is an AC electric motor in which the electric energy in the rotor had a need to generate 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-stage induction motor. Example enthusiasts,blowers, cranes,traction .It really is a ac motor. The primary drawback of DC motors may be the existence of commutator and brushes, which require regular maintenance and we can not use DC electric motor in explosive and dirty environment. But induction motors are cheaper,durable,lighter,smaller,require less maintenance and can use in filthy and explosive environment. Slide s is the imp aspect in this kind of motor.

There are 2 types of IM.

Squirrel cage IM

Slip ring IM

There are various starting and Three Phase Motor 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 electric motor is important

Pole changing

Stator voltage control

V/f control

Slip power recovery

Rotor resistance control

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