IMPROVED CURRENT DRIVER FOR ELECTRONIC DESCALING

摘要

An electronic descaling system to prevent or remove mineral deposits by exposing moving fluids to magnetic and electric fields includes an improved power supply. In particular, the power supply adapts to the varying length, diameter and impedance of attached coil (20) and cable combinations, and still provides the proper current and power levels to effectuate electronic descaling. A constant current D.C. power supply (10) having a regulated D.C. current output level is provided. The substantially constant D.C. current output is then switched in a switching circuit (12) responsive to a switching control signal to provide a bi-directional current through the coil (20) in one direction and then switched to conduct current through the coil (20) in the other direction. The switching frequency of the switching control signal is time variable or constant. The present improved current driver adapts for such varying frequencies while providing a substantially constant D.C. current output level as the frequency of switching control signal varies. The descaling coil (20) provides the proper induced electric and magnetic fields, and the resulting induced electromotive force, for different switching frequencies and for cables with varying lengths and coils with varying diameters.