Why rotating magnetic field is not produced in a transformer?

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1013472

2026-05-14 22:45

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In case of Alternator, the three phases (RYB) are wound on the stator in a sequential manner (R-Y-B-R-Y-B... so on) As we are aware, the three phases are electrically apart by 120deg. so that by adopting such a stator winding, a rotating magnetic field with synchronous speed (120*freq/no. of poles) is developed.
Even an emf is induced in the rotor also, with similar synchronous speed, but owing to large inertia of rotor, it cannot attain synchronous speed and stays standstill.

In case of transformer, the three-phase windings are wound on three limbs - on each limb LV winding is wound on the core and then HV winding is wound over the LV winding (for increased efficiency of transformer). Due to this constructional arrangement, a rotating magnetic field is not visualized in transformer, rather mutual inductance comes in to picture.

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