Electrical Studys

Definition:

Electrical Transformer is a static device that transfers electric power from one circuit to another without change of frequency. Since there is no rotating part in a transformer so it is a static device. Transformer operates on ac supply. In transformer operation two electrical circuits are not connected to each other rather they are interlinked by common magnetic circuit.

Operating Principle:

  Transformer works on principle of mutual inductance between two or more inductively coupled coils. Here one of the winding is called primary which is energized by an alternating voltage source and secondary winding is connected to the load. If ac voltage source is applied to primary winding coil it produces alternating current in it. This produces an alternating magnetic flux in the core of the transformer. Alternating magnetic flux links with primary and secondary coil turns and induces in them an emf by self induction and mutual induction respectively. The emf induced in secondary drives a current through the load connected across the secondary winding.