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Design And Construction Of 2kva Step Up Transformer With Input Voltage Regulation And Control Circuit
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CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
A
transformer is a static electromagnetic device that transfers energy by
inductive coupling between its winding circuits. In another way, a
transformer is an electrical device that transfers electrical energy
between two or more circuits through electromagnetic induction.
Electromagnetic induction produces an electromotive force within a
conductor which is exposed to time varying magnetic fields. A varying
current in the primary winding creates a varying magnetic flux in the
transformers core and thus a varying magnetic flux through the secondary
winding. This varying magnetic flux induces a varying electromotive
force (e.m.f) or voltage in the secondary winding. Transformers are used
to increase or decrease the alternating voltages in electric power
applications. In simple terms, it is an electromagnetic device that
steps up or steps down voltages. Making use ofFaraday's Law (discovered
in 1831) in conjunction with high magnetic permeabilitycore properties,
transformers can be designed to efficiently change AC voltages from one
voltage level to another within power networks (Gottlieb, 2012.).
A
wide range of transformer designs are used in electronics and electric
power applications. Transformers are essential for the transmission,
distribution and utilization of electric energy. There are many sizes,
shapes and configurations of transformers from tiny to gigantic like
those used in power transmission. Some come with stubbed out wires,
others with screw or spade terminals, some made for mounting in PC
boards, others for being screwed or bolted down.
Transformers are
composed of a laminated iron core with one or more windings of wire.
They are called transformers because they transform voltage and current
from one level to another. An alternating current flowing through one
coil of wire, the primary, induces a voltage in one or more other coils
of wire, the secondary coils. It is the changing voltage of AC current
that induces voltage in the other coils through the changing magnetic
field. DC voltage such as from a battery or DC power supply will not
work in a transformer.
Figure 1.1: A typical Transformer
Only AC
makes a transformer work. The magnetic field flows through the iron
core. The faster the voltage changes, the higher the frequency (Edward,
2011). However, the output of transformers various from single to
double or multiple.
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ABSRACT - [ Total Page(s): 1 ]This seminar research presents a study on transformer installation, operation and maintenance. A transformer is a static electromagnetic device that transfers energy by inductive coupling between its winding circuits. A transformer is an electrical device that transfers electrical energy between two or more circuits throughelectromagnetic induction. ... Continue reading---
