(1)Introduction (2)Types of transformer (3)Principle (4)Construction (5)Working (6)Efficiency (7)Energy losses

1. TRANSFORMER

2. Contents
 Introduction
 Types of transformer
 Principle
 Construction
 Working
 Efficiency
 Energy losses

3. Introduction
 A transformer is a static
electromagnetic device
that transforms one
alternating current into
another of different
voltage and current.
 It is a device used to
change the voltage.

4. Types of Transformer
 Step up transformer- It is
used to convert low
voltage to high voltage or
high current to low
current.
 Step down transformer-
It is used to convert high
voltage to low voltage or
low current to high
current.

5. Principle
 Transformer system is based on the principle of
mutual induction.

6. Construction
 Transformer consist of two coil insulates from each
other. They are wounded on a soft iron core. One of
the coil is called primary coil and other is called as
secondary coil.

8. Working
 This equation is equal to a constant k called
transformation ratio.
 For step up k>1 and for step down k<1.

9. Efficiency
 It can be defined as,

10. Energy Losses in Transformer
 Flux linkage
 Resistance of the windings
 Eddy current
 Hysteresis