All about Electric Transformer

Electricity Science


We all have heard about transformers being installed in every locality and in case there is a failure in the performance of transformer, the problem of power cut arises. Haven’t you ever wondered what this magical device is all about?

Electricity is a necessity of the present era. None of the electric gadgets work without electricity. But this electric supply has to be constant in nature so that the gadgets may perform properly and this is where electrical transformer comes into action.

What is an Electric Transformer?

Electric Transformer is a power conversion device. As the name suggests, it helps in the transformation of voltage from one point to another, usually from a higher voltage to lower voltage. It facilitates to a better, faster and efficient transportation of electricity. It helps convert the alternating current from one circuit into another circuit with the help of electromagnetic induction. It either increases or decreases the voltage coming from the substation.

Types of Transformer

Transformers may be classified into two types:

  • Step Up Transformer
  • Step Down Transformer

When a transformer raises the voltage i.e.the output voltage is higher than the input voltage, it is called as a step up transformer while a transformer is termed as a step down transformer if it lowers the voltage i.e. the output voltage is lower than the input voltage. The electricity supply at home is generally brought down to a limited amount of voltage.

Principle of Operation

Michael Faraday and Joseph Henry were the first one to find out the theory of operation of a transformer and this principle was electromagnetic induction. The working of a transformer is based over two principles:

  • Electromagnetism: It states that a magnetic field can be produced through electric current.
  • Electromagnetic Induction: It means that electric current is produced across a conductor moving in a magnetic field.

Electric Transformer is generally made of soft iron and consists of two coils namely primary coil and secondary coil (winding). The winding connected to the mains is considered as the primary coil whereas the one connected to the load is called as secondary coil. In an electric transformer, energy is transferred by electromagnetic induction from one coil to another set of coils with the help of magnetic flux.

Importance of Transformer

The transformer has helped mankind in a very pleasant way. There have been drastic changes in the state of electricity supply after the arrival of transformers in existence. Inappropriate voltage has always caused obstacles in the proper running of appliances in homes. And that is why transformers have helped us a lot. A constant flow of voltage takes place in a very easy, fast and cost efficient way. Transformers help pass current electricity from power stations to houses and offices in a very hassle free manner.

These are a very inexpensive path to provide power supply to so many places easily.  The repairing and maintenance cost of the transformer is also very low as there are no moving parts or rotating parts in it that may cause friction within them.

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Comments 1

  1. Neeraj bisht wrote:

    this website helped me a lot

    Posted 29 Dec 2016 at 2:29 am

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