A varying current in any one coil of the transformer produces a varying magnetic flux in the transformer s core which induces a varying electromotive force across any other coils wound around the same core.
Transformer core are laminated for what purpose.
Purpose of transformer core.
Electrical energy can be transferred between separate coils without a metallic conductive connection between the two circuits.
A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another or multiple circuits.
A transformer core is laminated to a reduce hysteresis loss b reduce eddy current losses c reduce copper losses d reduce all above losses.
The performance of a transformer mainly depends upon the flux linkages between these windings.
The eddy currents cause energy to be lost from the transformer as they heat up the core meaning that electrical energy is being wasted as unwanted heat energy.
The main purpose of a transformer core is to provide a closed magnetic path to the magnetic flux.
Without disturbing the closeness of the magnetic path we can design two types of core.
A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical electromechanical and magnetic devices such as electromagnets transformers electric motors generators inductors magnetic recording heads and magnetic assemblies it is made of ferromagnetic metal such as iron or ferrimagnetic compounds such as ferrites.
For efficient flux linking between these windings one low reluctance magnetic path common to all windings should be provided in the transformer.