What is a Step Down Transformer | Construction Of Step Down Transformer | Working Principle Of Step Down Transformer | Types of Step Down Transformer | Application Of Step Down Transformer

What is a Step Down Transformer | Construction | Working Principle And Its Application

Hello friends as we all know Transformers do not have any kind of moving parts like motor

The main function of a transformer is to transfer current and voltage from one circuit to another. There is no difference in the frequency of any species during this process.

Transformers can be classified into two parts depending on the function step sub transformer and step down transformer.

The use of step sub transformer is to increase the low voltage and the function of the step-down transformer is to reduce the high voltage in stark contrast.

Today we will talk about the step-down transformer in its construction and its working principle in its application etc.

What is a Step Down Transformer?


Step Down Transformer

Definition: A type of transformer that converts high voltage current to low voltage current is known as step down transformer.

This type of transfer has 2 windings, a primary winding and a secondary winding.

The turns of the primary winding are more than those of the secondary winding

For example the voltage used in our power circuit is 230V to 110V but 16V is required to operate any device.

In such a requirement a step down transformer is used which is first reduced to 230V to 110V and then to 16V.

Read More: Difference Between Step-up And Step-Down Transformer

Construction of Step Down Transformer

Construction of Step Down Transformer

A step down transformer is constructed using 2 or more coils in the core of the transformer.

The energy efficient transformer uses a ferromagnetic core as it is converted into a magnet using the primary winding and sends the energy to the secondary winding.

A simple method of obtaining a ferromagnetic coil is to find a large inch steel washer or 2-3 inches of racking yard.

Any copper wire is used to make the transformer but 28 gauge magnetic wire is excellent for making this.

This is a thin copper wire with insulation coated. To make the primary coil, cover the wire tightly in the region of the washer

Count the turns of the winding and note the correct place

When the winding of a transformer is complete, keep both the ends open for power supply and cover properly with heat synchronous tube.

But when winding, special care should be taken that the turns of the secondary coil do not exceed that of the primary coil.

Read More: Step up Transformer | Construction | Working & Its Applications

Working Principle Of  Step Down Transformer

The step down transformer operates according to Faraday’s principle of electromagnetic induction.

In a transformer, mutual induction between two windings is required for transmission.

According to Faraday’s law, once the magnetic flux connecting the circuit is changed, an electromotive force can be transmitted inside the circuit which is proportional to the rate of change of flux linkage.

The induced electromotive force is determined by the number of windings present in the transformer

So this is also called turns ratio. The increase or decrease in transformer voltage depends on the turns ratios.

The turns of the secondary winding are less compared to the primary winding. The connection of current with the secondary coil is also less than that of the primary coil.

So that the induced electromotive force in the secondary winding is less, for this reason, the voltage decreases in the secondary winding as opposed to the primary winding.

Formula Of Step Down Transformer 

The formula of Step Down Transformer is as follows

Ns/Np = Vs/Vp

In which Ns is the secondary winding

Np is the primary winding.

Vs is the voltage of the secondary winding

Vp is the voltage of the primary winding

Ns < Np


Types of Step Down Transformer

Step down transformers are classified into 3 types.

1. Single phase
2.Center phase.
3. Multi taped.

1. Single Traps

Single phase is used to reduce the rating of current and to give low voltage to the input voltage and give output current like 12V AC.

2.Center Phase.

The center tap consists of a primary and a center divided in the middle so that it gives an output voltage with center dividing like 12v from 0 to 12v.

3. Multi Taped.

Multi taps have a lot of tapping in the secondary winding used to get the preferred output through secondary coils like 0 to 12v, 0 to 18v.

Advantages of Step Down Transformer

  • The cost is low.
  • Sustainability is high
  • Reliability is high
  • High efficiency
  • Provides different voltage supplies
  • Used to lower the voltage so that transmission power generation becomes cheaper and easier

Disadvantages of Step Down Transformer

The disadvantages of step-down transformers are as follows

  • Maintenance requires more
  • It takes a long time to fix any fault
  • Volatility in feedstock costs

Applications of Step Down Transformer

The applications of step-down transformers are as follows

  • Inverter
  • Power distribution network
  • TV
  • In welding machines
  • Home appliances
  • Electrical isolation
  • Voltage stabilizers
  • Adapters
  • CD players
  • Doorbells
  • Chargers

Read More:

Electrical Substation Components and Their Workings

Difference Between Step-up And Step-Down Transformer

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