Transformers
Class: 12
Submitted to:
Mr. Jonny beaver,
Physics teacher
Submitted by:
Mohammed Al Khabori
19 February 2011
Theoretical report
Transformers
I have generated series of questions, regarding the transformers, which are to be researched and answered. They are the following: * What is the history of transformers? * What is a transformer? * Which principle/laws does the transformer obey? * How can we construct a transformer? * How does a transformer function/work? * What are the mathematical formulae, which show the relationship between the different quantities to be measured and how it’s derived?
* What are the different types of transformers? * What is the major source of energy loss in a transformer? * What are the uses of transformers? * Why do we employ high voltages?
History of transformers:
Transformer is based upon the theory of electromagnetic induction and Michael Faraday discovered that in 1831. In 1836 the first device, an induction coil, was invented. William Stanley, who designed the first commercial model, introduced the term "transformer" in 1885.
What is a transformer?
Transformers are electrical devices that change the value of an alternating voltage.They do this by applying the principle of magnetic induction between coils to convert voltage and/or current levels. Transformers are mainly made up of two coils wrapped around the iron core. The first coil is called the primary coil and the second coil is called the secondary coil.
What principle/law does the transformer obey?
The transformer obeys the faradays law. Faradays law states that the size of the induced voltage in a conductor equals the rate of change of magnetic flux.
How can we construct a transformer?
Transformers are mainly composed of iron core made of laminated sheets, well insulated from one another. The iron core normally comes in a rectangular shape. There are two coils