STATIC CONVERTER WITH QUASI-RESONANT CURRENT SWITCHING Russian patent published in 1998 - IPC

FIELD: power supplies incorporating high-frequency section for loads running at no load for long time, such as welding machines, or equipment requiring no-break power supply. SUBSTANCE: converter that has two series- connected DC power supplies, series resonance-tuned LC circuit connected on one end through controlled valves shorted out by diodes to free poles of power supplies and on other end, to their common point, as well as load connected directly or through matching transformer to resonance-tuned circuit capacitor, is provided, in addition, with choke or series LC circuit connected in parallel with resonance-tuned circuit capacitor to form oscillatory circuit. Choke should be better used for transformerless circuit arrangement, and LC circuit, for circuits using matching transformer. EFFECT: reduced loading of power components and loss under no-load conditions. 4 dwg