Transformer Formula

Transformer 

In other words, the transformer transforms the energy from one circuit to another. This occurs through electromagnetic induction. It is known as an efficient voltage converter, which can reduce the high voltage to low voltage and vice versa. A good-condition transformer consists of two windings, namely primary winding and secondary winding. There are two types of the transformer; step up and step down transformers.

The transformer formula is given by,

Where

V_p = primary voltage,

V_s = secondary voltage,

N_p = number of turns in the primary

N_s  = number of turns in the secondary

Solved Examples

Example 1

The number of primary and secondary windings is 60 and 100 respectively. The secondary voltage is given by 250V, determine the primary voltage.

Solution:

Given:

Np = 60,

Ns = 100

Vs = 250V

The transformer formula is given by,

Vp / Vs = Np / Ns

Vp = Np / Ns ×Vs

    = 60 / 100 x 250

Vp = 150 V

Example 2

The number of primary and secondary windings is 100 and 350 respectively. The primary voltage is given by 200V, determine the secondary voltage.

Solution:

Given:

Np = 100,

Ns = 350 and

Vp = 200V

The transformer formula is given by,

Vp / Vs = Np / Ns

Vs = Vp×Ns / Np

Vs = 200 × 350 / 100

Vs = 700V

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