Scattering Field Transformers  Manufacturers, Traders, Suppliers

A transformer (hereinafter referred to as transformer) is in the broader sense a device that converts (transforms) electrical voltages and currents of a certain magnitude into another magnitude. This is done by electromagnetic means. The transformer has at least one so-called input winding (also called primary winding) and one so-called output winding (also called secondary winding) which are not electrically and mechanically connected to each other. The power and voltage transfer is effected by the magnetic coupling effect of an iron core to which both windings (coils) are applied. The input winding generates an alternating magnetic field, whose magnetic lines generate a voltage in the output winding. The voltages are proportional to the number of windings applied to the two coils, the currents are inversely proportional. The transmitted power, if one disregards the efficiency, remains the same. Power is the product of voltage times current. That is, low voltage = high current, high voltage = low current. It is also clear from the above that a transformer only works with alternating voltage or current, only this generates an alternating magnetic field.In order to achieve good efficiency, the magnetic coupling between the windings and the iron core must be as close as possible. This results in a"hard" characteristic curve, which means that even under high loads the transformer hardly drops to its knees. For stray field transformers the exact opposite is the case and desired. A loose (poor) coupling is achieved by various measures, so that the transformer becomes"soft" and thus limits the power and the current on the output side. One could also say that the stray field transformer slows itself down with increasing load. Typical applications for a stray field transformer are: Welding transformers, here the arc is limited, which would otherwise lead to an uncontrolled short circuit. A high voltage is required for"ignition" with series transformers for neon sign tubes. This is limited by the characteristic of the stray field transformer.Intrinsically safe power supplies, which are almost independently short-circuit proof due to the soft characteristic.The stray field transformer also prevents voltage peaks and high-frequency interference voltages occurring in the mains from being transmitted to the output side.