Patent ID: 7524423
Filing Date: 2009-04-28
Classification: C02F,H03K

Abstract:
1. A method for electromagnetically treating a flow of liquid, said method comprising: providing a coil means surrounding said flow and having both an inductance and a capacitance in parallel with one another; providing an AC voltage source having a period including a first half cycle of one polarity and a second half cycle of a polarity opposite to that of the first half cycle; connecting a first switch in series with the AC voltage source and the coil means; controlling the first switch so as to conduct current from the AC voltage source in one direction through the first switch and the coil means during at least a portion of each first half cycle of the AC voltage source and so as to not conduct current through the first switch in a direction opposite to said one direction during each second half-cycle of the AC voltage source; and during each second half-cycle of the AC voltage source performing successive substeps of first connecting an electrical energy source to said coil means to add electrical energy to the coil means and then disconnecting said electrical energy source from said coil means to produce a ringing current pulse in said coil means, the successive substeps being performed at least once.