System and method of generating a ringing magnetic pulse for the treatment of flowing liquids

A method as defined in claim 3, and further comprising:

• said step of during each second half-cycle of the AC voltage source performing at least one successive substeps being accomplished by providing an electrically controlled switch connected in series with the coil means and the AC voltage source to form a second electrical loop;
• conducting current through the first loop during at least a portion of the first half-cycle when the SCR is forward biased while preventing current from being conducted through the second loop;
• conducting current through the second loop during a first portion of the second half-cycle while current is prevented from being conducted through the first loop when the SCR is reverse biased;
• and
• preventing current from flowing through the second loop during a second portion of the second half-cycle upon the current flowing through the coil reaching a predetermined value to interrupt current flowing through the coil and to thereby generate a ringing magnetic pulse.

A system for electromagnetically treating a flowing liquid, said system comprising:

• a coil means surrounding the flow of liquid;
• an AC power source;
• a switching arrangement connected in series with the coil means and the AC power source, the switching arrangement including first and second switch means connected in parallel with one another;
• and
• a control means for controlling the operation of the first and second switch means.

A system for electromagnetically treating a flow of liquid, said system comprising:

• a coil means surrounding the flow of liquid and having both an inductance and a capacitance in parallel with one another;
• a switch means connected in series with the coil means to form a series connected combination;
• an AC power source connected across the series connected combination;
• and
• said switch means being operable to close a circuit through the AC power source and the coil means during a first portion of each cycle of the AC power source, during which first cycle portion current from the AC power source flows in one direction through the coil means, and the switch means also being operable during a remaining portion of each cycle of its AC power source to first open and then close the circuit a multiple number of times to create an equal multiple number of ringing pulses of current in the coil means.

A system for electromagnetically treating a flow of liquid, said system comprising:

• a coil means surrounding the flow and having both an inductance and a capacitance;
• means providing a source of AC voltage 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;
• a first switch in series with the AC voltage source and the coil means;
• 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
• means operable and at least once during each second half-cycle of the AC voltage source for connecting a source of electrical energy to the coil means to add electrical energy to the coil means and for then disconnecting the source of electrical energy from the coil means to produce a ringing current pulse in the coil means.