Transformer frequency

The transformer frequency is a type of frequency. Which is equal to both coils of the transformer. Some aspects of transformer frequency are highlighted.

What is frequency?

The number of cycles completed in a given web at a given time is called frequency. The time is usually taken to be 1 second.

Suppose, ten cycles are completed on a web in 1 second. In this case, the frequency will be 10 Hz.

Each cycle is 360 degrees. A cycle is completed with a positive half cycle and a negative half cycle. The unit of frequency is Hertz (Hz).

Frequency calculation

f = Frequency

N = Number of cycles

T = Time

`f=\frac NT`

From this, we understand that frequency is nothing but frequency as many cycles are completed at a particular time.

In other words,

The number of cycles made per second by an alternating quantity is called frequency. It is measured in cycle per second (c/s) or hertz ( Hz ) and is denoted by ( f ).

Transformer increase frequency

Transformer emf equation, we get

E = Voltage

F  =  Frequency

N = Number of turns

`\varphi_m` = Mutual flux

`E=4.44\varphi_mfN` -------( 1 )

The frequency calculation formula for frequency calculation is from the above equation.

`f=\frac E{4.44\varphi_mN}` ----- ( 2 )

In this case, the frequency equation implies that the flux decreases as the frequency increases.

The following formula can be used as the winding inductor of the transformer.

L = Inductor

I = Current

`\varphi` = Flux

`L=\frac{N\varphi}I` ----- ( 3 )

This equation shows that as the flux decreases, the inductor decreases but at the same time the current increases.

More is known from Equation 2

`f=\frac E{4.44\varphi_mN}`

E = Voltage

F  =  Frequency

N = Number of turns

A = Area

`B_m` = Mutual flux

`f=\frac E{4.44B_mAN}`

`(\varphi_m=B_mA)` `\varphi_m` Instead `B_mA` Has been written.

By doing this, it is understood that as the frequency (f) increases, the area (A) decreases. This area is the winding area of the transformer.

High-frequency transformers tend to be smaller in size than folk frequency transformers. But the power rating remains the same.

Suppose the high-frequency transformer between two 25KVA transformers will be smaller in size than the greed frequency transformer.

Hysteresis loss will increase with increasing frequency in high-frequency transformers.

Why is the frequency is same in both coils of a transformer?

When a coal AC is applied to a transformer to produce a magnetic field, the AC voltage of the other coil is absorbed. Connecting an AC source to anyone's coil creates a variable magnetic field in the coil. According to Faraday's formula, voltage is induced in the coil Since the voltage is generated in the secondary with the same supply, the frequency of both the coils of the transformer remains the same.


Main parts of transformer


2.primary winding

3. secondary winding



6.insulation oil

7.buckle relay


9.bushing point

11.transformer oil

12.radiator tube


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FAQ In Transformer frequency

Q1. A transformer transforms?
Ans: The transformer converts voltage but the frequency remains unchanged.

Q2. Doesn't the transformer change?
Ans: The power and frequency do not change in the transformer. But current and voltage change.

Q3. A transformer converts energy from primary to secondary through what?
Ans: Transform transmits allergens from primary to secondary through mutual flux. There is no electric connection between the two coils.

Q4. Which winding of transformer has more turns?
Ans: The high voltage side of the transformer has more turns. The low voltage winding has less turns.

Q5. What method is usually used to keep the transformer cool?
Ans: The oil cooling method is usually used to keep the transformer cool. This method is more suitable for power transformers and distribution transformers.

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