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Transformers

Transformers. Definition History Working principle Why do we use transformers? Classification Example Manufacturing of transformers. Overview.

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Transformers

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  1. Transformers

  2. Definition • History • Working principle • Why do we use transformers? • Classification • Example • Manufacturing of transformers Overview

  3. Transformer is a power converterdevice that transfers energy between two electrical circuits by inductive coupling between two or more windings. It bring voltage up or down in ac electrical circuit and it can be used to convert ac power to dc power. Definition

  4. Single-phase distribution transformer in Canada use like a power supply facilities outside settlements, such as isolated houses.

  5. The principle behind the operation of a transformer, electromagnetic induction, was discovered independently by Michael Faraday and Joseph Henry in 1830. But the first transformer used was about 1886 by William Stanly which was used in the electrification of great Barrington , Massachusetts. History

  6. Stanly’s First transformer

  7. The transformer is based on two principles: first, that an electric current can produce a magnetic field (electromagnetism) and second that a changing magnetic field within a coil of wire induces a voltage across the ends of the coil (electromagnetic induction). Changing the current in the primary coil changes the magnetic flux that is developed. The changing magnetic flux induces a voltage in the secondary coil. Working Principal

  8. To reduce the voltage or increase it between the primary and the secondary sides Why do we use transformers?

  9. To provide an economical way of transmitting power over the long distances. Why do we use transformers?

  10. Converting from AC to DC.

  11. According to method of cooling.Example: Self-air–cooled (dry type). • According to number of phases.Example: Single-phase. • According to insulation between windings. Example: Autotransformers. • According to method of mounting.Pole and platform transformers • According to purpose.Example: Constant voltage transformer. • According to service. Example: Distribution transformer. Classification

  12. Distribution transformer Platform mounted transformer AC to DC transformer

  13. AC to DC Transformer in Details

  14. Manufacturing • The coil Usually cupper and Aluminum are used to build the coil to reduce the resistance • winding • The core

  15. Video Link http://www.youtube.com/watch?v=ANK--5Fu518 Manufacturing

  16. Whelan, M. "The History of the Transformer." The History of the Transformer. The Edison Tech Center, n.d. Web. 21 Dec. 2012. <http://edisontechcenter.org/Transformers.html> • http://www.mhprofessional.com/downloads/products/0071494626/CroftCh5.pdf • http://en.wikipedia.org/wiki/Transformer • http://www.powerwise.org.uk/ollieandsparky/teachers/OC3.html • http://www.youtube.com/watch?v=ANK--5Fu518 References

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