Dan Luckow Electric


Transformers


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Transformers Cast Resin TransformersA transformer is an electrical device that uses electromagnetic induction to transfer energy between two or more circuits. The major importance of transformers lies in their abilities to decrease or increase the voltages of alternating current in applications that uses electric power.

Where there is a differing current in the primary winding of the transformer, it leads to a different magnetic flux in the transformer core and a different magnetic field which affects the secondary winding of the transformer. The differing magnetic field at the secondary winding causes a differing voltage or electromotive force in the secondary winding.

Transformers are thus created for the purpose of changing AC voltages within power networks from one voltage level to another.

The history of transformer could be traced to the discovery of induction by Michael Faraday and Joseph Henry in 1831 and 1832 respectively. The first experiments on induction performed by Faraday between coils of wire led to the creation of the first toroidal closed-core transformer. The first widely used type of transformer was however invented by Rev. Nicholas Callan in 1836. He was a research in Maynooth College in Ireland and he was able to discover that increments in the number of turns of the secondary winding compared to the number of turns in the primary winding would lead to an increment in the induced secondary EMF.

The efforts of scientists to increase the voltages of batteries led to the evolution of induction coils. However, direct current was produced by batteries as opposed to alternating currents. This made the induction coils to rely on the electrical contacts vibrations that constantly interrupted the flow of current in the primary to produce the flux changes which is needed for induction. A lot of experiments to create more effective induction coils between 1830s and 1870s through trials and errors led to the discoveries of the basic principles of transformers with time.

Generators with abilities to produce alternating currents were available in the 1870s and it was found that it was possible even without an interrupter to directly power an induction coil. A lighting system was invented in 1876 by Pavel Yablochkov who was a Russian Engineer. His lighting system used a set of induction coils whose primary windings were connected to alternating current. Several electric candles designed by him could then powered by the secondary windings. Some other lighting systems were also carried out between 1878 and 1874 by Ganz factory in Budapest, Hungry, Luicien and John Dixon Gibbs in London where the principles of transformers were used. The first 3-phased transformer was however developed by Mikhail Dolivo-Dobrovolsky who was a Russian-born engineer in 1889. The Tesla coil developed in 1891 by Nikola Tesla gave transformers the ability to generate high voltages at high frequency.

There are different types of transformers based on electrical application designs. While they all operate on the basic principles of transformer, they differ in terms of electrical properties or construction. The different types of transformers include Autotransformer, capacitor voltage transformer, distribution transformer, phase angle regulating transformer, polyphase transformer, scott-T transformer, Pulse transformer, instrument transformer, resonant transformer, grounding transformer, leakage transformer, output transformer and audio transformer.

The major application of transformers is to step up the voltage of an electrical energy before transmitting it through wires over long distances. The resistance of wires leads to energy being lost during transmission due to joule hitting. Converting the power to a higher voltage before transmission allows for economical transmission and distribution of power.

Transformers are also applied in electronic products to step down the voltage so as not to destroy the low voltage circuits in the electronics. Telephone circuits are able to hold a 2-way conversation on 1 pair of wires with the aid of an audio transformer.

Transformers are thus very important in electricity as well as electronic appliances.

Give us a call 24/7/365 and talk to our dedicated staff so we can get you the transformers you are looking for. 

      800-237-4965


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