Basic Electronics and Electrical Engineering: Chapter 3: Transformer
Working Principle of a Transformer
Transformer is a static device, which transforms the electrical power from one circuit to another circuit at the same frequency. It operates on the principle of mutual induction.
CHAPTER‒
3
TRANSFORMER
INTRODUCTION
Transformer is a static
device, which transforms the electrical power from one circuit to another
circuit at the same frequency. It
operates on the principle of mutual induction.
WORKING PRINCIPLE OF A TRANSFORMER
A transformer operates
on the principle of mutual inductance, between two inductively coupled coils.
It consists of two windings in close proximity as shown in Fig. 3.1. The two
windings are coupled by magnetic induction. (There is no conductive connection
between the windings). One of the windings called primary is energised by a
sinusoidal voltage. The second winding called secondary feeds the load.
The alternating current
in the primary winding set up an alternating flux (ϕ) in the core.
The secondary winding
is linked by most of this flux and emf are induced in the two windings. The emf
induced in the secondary winding drives current through the load connected to
the winding.
Energy is transferred
from the primary circuit to the secondary circuit through the medium of the
magnetic field.
In brief, a Transformer
is a device that:
(i) transfers electric
power from one circuit to another;
(ii) it does so without
change of frequency; and
(iii) it accomplishes
this by electromagnetic induction (or mutual inductance)
Basic Electronics and Electrical Engineering: Chapter 3: Transformer : Tag: Basic Engineering : - Working Principle of a Transformer
Basic Electronics and Electrical Engineering: Chapter 3: Transformer
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Basic Electronics and Electrical Engineering
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