When a sinusoidal voltage is applied to the primary winding of a transformer, alternating flux ϕm sets up in the iron core of the transformer. This sinusoidal flux links with both primary and secondary winding. The function of flux is a sine function.
The rate of change of flux with respect to time is derived mathematically.
The derivation of the EMF Equation of the transformer is shown below. Let
- ϕm be the maximum value of flux in Weber
- f be the supply frequency in Hz
- N1 is the number of turns in the primary winding
- N2 is the number of turns in the secondary winding
Φ is the flux per turn in Weber.
Derive EMF Equation of Transformer
Transformer Ratio – Single Phase Transformer (Turn Ratio, Voltage Ratio, Current Ratio)
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