BEE.pdf
- 2. Group Members KURIL V. S. PAWAR H. B. LOHARE S. M. KUMBHAR S. V.
- 3. Transformer History, Use, Workking, types and More Detail
- 4. CONTENTS History Introduction Construction Working and Principle Types of Transformer Ideal Transformer Uses of Transformer
- 5. History 1. The first Electrical power distribution system developed by Edison in 1880s was transmitting DC. It was designed for low voltage. 2. The second generation of power distribution system was purposed by Tesla few years later. His idea was to generate AC power of any convenient voltage.
- 6. Transformer A transformer is a device that changes AC electric power at one voltage level to another voltage level through the action of a magnetic field. It involves interchange of electric energy between two or more electric systems.
- 7. Working and Principle Working When current in the primary coil changes being alternating in nature, a changing magnetic field is produced This changing magnetic field gets associated with the secondary through the soft iron core Hence magnetic flux linked with the secondary coil changes. Which induces EMF in the secondary.
- 8. Construction A transformer consist of a rectangular or the core of soft iron in the from of sheets insulated from one another. Two separate coils of insulated wires, a primary coil and a secondary coil are wound on the core. These coils are well insulated of one another. The coil on the input side is called Primary coil and on the out put side is called Secondary coil.
- 9. Principle It is based on principle of MUTUAL INDUCTION. According to which an e.m.f. is induced in a coil when current in the neighboring coil changes.
- 10. Types Of Transformer There are Generally two types of Transformer. Step up Transformer Step down Transformer Some important types of are given as… Auto Transformer Poly-phase Transformer Leakage Transformer Resonant Transformer Instrument Transformer
- 11. Step up Transformer • A step up transformer is a device that converts low alternating voltage to high alternating voltage. • In another word Ns > Np that is called step up Transformer.
- 12. Step Down Transformer A step up transformer is a device that converts high alternating voltage to low alternating voltage. In another word Np > Ns that is called step up Transformer.
- 13. Auto Transformer An auto transformer has only a single winding with two end terminals, plus a third at an intermediate tap point.
- 14. Poly-Phase Transformer For three phase supplies, A bank of three individual single-phase transformer can be used or all three phases can be made as a single three-phase transformer.
- 15. Instrument Transformer Current transformer, designed to be looped around conductor. A current transformer is a measurement device provide a current in its secondary coil proportional to the current flowing in its primary.
- 16. Resonant Transformer A resonant transformer is a kind of leakage transformer. It uses the leakage inductance of its secondary windings in combination with external capacitors, to create one or more resonant circuits.
- 17. Ideal Transformer An ideal transformer is a lossless device with an input winding and an output winding. It has the following properties. No iron and copper losses. No leakage fluxes. A core of infinite magnetic permeability and of infinite electrical resistivity. Flux is confined to the core and winding resistances are negligible.
- 18. Uses of Transformer The Transformer used in Television and Photography machines. The transmission and distribution alternating power is possible by transformer. Simple camera flash use fly back Transformer. Single and audio Transformer are used couple in amplifier.