EMF Equation of Transformer

EMF Equation of Transformer Definition

The EMF equation of a transformer is derived using Faraday’s law, indicating the induced EMF based on flux changes and winding turns.

Magnetizing Current

An alternating current in the primary winding generates a magnetizing current that produces alternating flux in the transformer’s core.

Sinusoidal Flux and EMF

The sinusoidal primary current creates a sinusoidal flux, and its rate of change (cosine function) determines the induced EMF.

Voltage and Turns Ratio

The ratio of primary to secondary voltage (voltage ratio) is directly proportional to the ratio of the number of turns in the primary and secondary windings (turns ratio).

Transformation Ratio

The transformation ratio (K) indicates whether a transformer is step-up (K > 1) or step-down (K < 1), based on the primary and secondary windings.