☑ Induction Motor As A Transformer

Another difference is that transformer is an alternating flux machine while induction motor is rotating flux machine. Unlike a transformer the magnetic circuit of a 3 phase induction motor has an air gap.

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Estimation Of Equivalent Circuit Parameters Of Transformer

Induction Motor Graph Of A Function Transformer Ac Motor

Therefore the magnetizing current in a 3 phase induction motor is much larger than that of the transformer.

Induction motor as a transformer. The induction motor is similar as a transformer with a rotating short circuited secondary. Circuit globe induction motor auto transformer starter. The normal transformer has no air gap as against this an induction motor has distinct air gap between its stator and rotor.

So it is also called the rotating transformer. For example in an induction motor it may be as high as 30 50 of rated current whereas it is only 1 5 of rated current in a transformer. Induction motor is a well known device which works on the principle of transformer.

Ii in an induction motor there is an air gap and the stator and rotor windings are distributed along the periphery of the air gap rather than concentrated on a core as in a transformer. In this method the starting current is limited by using a three phase auto transformer to reduce the initial stator applied voltage. Therefore the leakage reactances of stator and rotor windings are quite large compared to that of a transformer.

Transformer is a electrical device which transfers electrical power from one circuit to another without changing its frequencywhereas induction motor is a machine which converts the given electrical energy into mechanical energy. The stator winding in induction motor corresponds to the primary winding in the transformer and the rotor winding in induction motor corresponds to the secondary. That is when an emf is supplied to its stator then as a result of electromagnetic induction a voltage is induced in its rotor.

So an induction motor is. The difference is that the normal transformer is an alternating flux transformer while induction motor is rotating flux transformer. There are many similarities and differences between the induction motor and transformer.

Auto transformer starter an auto transformer starter is suitable for both star and delta connected motors. Auto transformer starter can be used for both stardelta connected induction motors. An induction motor can therefore be made without electrical connections to the rotor.

Rotating flux is only possible when three phase voltage or poly phase which is 1200 apart in time is applied to a three phase winding or poly phase winding 1200 apart in space then a three phase rotating magnetic flux is produced whose magnitude is constant but direction. An induction motor or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. The starting current 6 to 8 times the rated current and this can cause voltage dip in supply and also motor and motor driven equipment experience large torque surge which can damage the motor as well as connected equipment.

Similarities between induction motor and transformer.