US 3,953,779 AGranted

Electronic control system for efficient transfer of power through resonant circuits

OwnerFrancisc Carol Schwarzinventor

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Abstract

A device to control the transfer of energy via resonant circuits from a D.C. source of electric energy to a load. The device confines the resonant currents to near the magnitude needed to accomplish this controlled transfer within prescribed limits, independent of variations of the source voltage or of the load. The voltage stresses imposed on the individual circuit components are contained accordingly. An electronic control system governs the electronic power switches to conform to a pattern of operation which confines the average currents in the resonant circuits to preset levels and therewith confines the series capacitor voltage amplitude to predictible and restricted magnitudes. The rms content of the resonant current is restricted to predictible and moderate deviations from a design norm for specified conditions of system operation.

Claims16

Dependent claims

A controllable converter device for providing electrical current to a load, comprising in combination:

a power source;
first and second switch means;
capacitor means;
a first series resonant circuit comprising said first switch means connected in series with the load and said capacitor means;
a second series resonant circuit comprising said second switch means connected in series with the load and said capacitor means;
means connecting said first and second resonant circuits across said power source;
control means enabling alternate conduction of said first and second switch means to provide alternate direction load current from said power source to the load during alternate charging of said capacitor means;
said alternate charging of said capacitor means providing alternate potentials which oppose said alternate conduction of said first and second switch means thereby alternately terminating conduction of said first and second switch means;
and means connected to said first and second series resonant circuit for enabling discharge of said capacitor means between said alternate direction load currents to limit the voltage of said capacitor means.

6 more elements

Dependencies are inferred from the claim text.