Working Principle of Pulse Transformer

Working principle of pulse transformer A transformer that uses the magnetic saturation performance of the core to convert the input sinusoidal voltage into a narrow pulse-shaped output voltage . It can be used for burner ignition, thyristor triggering, etc. The structure of the pulse transformer is that the primary winding is sleeved on the iron core column with a larger cross-section made of silicon steel sheets, and the secondary winding is sleeved on the iron core column with a smaller cross-section made of Permalloy material that is easy to highly saturate. A magnetic shunt can be set between the two columns. The relationship between voltage and flux, the input voltage u1 is a sine wave, and a sinusoidal magnetic flux Φ1 is generated in the left core. The magnetic flux Φ2 in the right core is highly saturated and is a flat-top wave. It only changes near the zero value and immediately saturates to a fixed value. When Φ2 passes through the zero value, an extremely steep narrow pulse electromotive force e2 is induced in the secondary winding. There is an air gap in the magnetic shunt, and Φσ basically changes linearly, similar to leakage magnetic flux, and its function is to ensure that Φ1 is a sine wave.