A transformer is a static piece of apparatus with two or more windings which, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current of same values or of different values, and at the same frequency for the purpose of transferring electrical power.

Although transformers look simple, its design involves a few very important electromagnetic laws and formulas.

As mentioned above, one of the important building blocks is a two-coil wire - namely primary and secondary windings. These two windings are placed in a very close proximity and are linked by the alternate flux in the core. As the result, the voltage is induced in the winding. The formula below is used to calculate the induced voltage in the secondary winding.

E = kAcNBmf(10-4)

Where,

E – induced voltage

k – constant, 4.44 for sinewave

4.00 for squarewave

Ac – cross section area of core in cm2

N – number of turn which induces the voltage

Bm – maximum flux density of the core in Tasla

f – frequency in Hz

Armed with the above formula, one can increase or decrease the amount of turns of the winding to increase or decrease the induced voltage. Indeed, there are more turns on the secondary winding than in the primary winding for a step-up transformer and vise versa for a step-down transformer.

As many wonder what a transformer may do, if the windings are not correctly designed and manufactured, they may cause harm to the system in which the transformer is used, and put the user in danger because of the risk of electrocution, burns, and fires. We take pride in the design and fabrication of our transformers. We design the transformers to be accurate to the customers’ specifications and make them safe, highly efficient and long-lasting.