1. Transformers

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

3. Definition
Transformer is a power converter device 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.

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

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

6. Stanly’s First transformer

7. Working Principal
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.

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

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

11. Converting from AC to DC.

12. Classification
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.

13. Distribution transformer
Platform mounted transformer
AC to DC transformer

14. AC to DC Transformer in Details

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

16. Manufacturing
Video Link

17. References
Whelan, M. "The History of the Transformer." The History of the Transformer. The Edison Tech Center, n.d. Web. 21 Dec <