Scheme for rapid adjustment of network impedance

An apparatus disposed in an A.C. line between an A.C. source and load for impedance adjustment in the A.C. line comprising:

• a transformer having a primary coil and a secondary coil;
• said primary coil being serially connectable in said A.C. line with said A.C. source and load;
• a controlled inductor device connected across said secondary coil of said transformer, said controlled inductor device including
• an inductor, and
• switch means, connected in series with said inductor, for adjustably controlling the conduction period of the current passing through said inductor to thereby vary the effective reactance of said inductor;
• and
• a continuously operable parallel reactance connected in parallel with said controlled inductor device.

An apparatus disposed in an A.C. line between an A.C. source and load for network impedance adjustment in the A.C. line comprising:

• continuously operable reactance means, connected in series with said A.C. line between said A.C. source and load, for providing coarse correction of the impedance of said A.C. line;
• and
• controlled inductor means, connected in series with said A.C. line between said A.C. source and load across said reactance means, for adjusting the impedance of said A. C. line, said controlled inductor means including,
• an inductor, and
• switch means, connected in series with said inductor, for adjustably controlling the conduction period of the power supplied through said inductor to thereby vary the effective reactance of said apparatus from the reactance of said reactance means alone to that of the parallel combination of said reactance means and said inductor.

A method of impedance adjustment in an A.C. line disposed between an A.C. source and load comprising:

• forming an impedance adjustment device including,
• an inductor,
• switching means, connective in series with said inductor, and
• a continuously operable parallel reactance connected in parallel with said series connection of said inductor and said switch means;
• inserting said impedance adjustment device serially within said A.C. line between said source and load;
• and
• adjustably controlling the conduction period of the current passing through said inductor to thereby adjust the impedance of said line.