Joseph D Evans

US Patent:

57257787, Mar 10, 1998

Filed:

Oct 17, 1995

Appl. No.:

8/544156

Inventors:

Young I. Cho - Cherry Hill NJ
Joseph M. Evans - Morgantown PA

Assignee:

Electronic Descaling 2000, Inc. - Boothwyn PA
Drexel University - Philadelphia PA

International Classification:

C02F 148

US Classification:

210695

Abstract:

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 and cable combinations, and still provides the proper current and power levels to effectuate electronic descaling. A constant current D. C. power supply having a regulated D. C. current output level is provided. The substantially constant D. C. current output is then switched in a switching circuit responsive to a switching control signal to provide a bi-directional current through the coil in one direction and then switched to conduct current through the coil 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.