Plural parallel resonant switching power supplies
AssigneeTDK Corporation
InventorsKatsuhiko Shimizu, Masaharu Hatta
Life of this patent
Estimating the term…
Abstract
A plurality of converter circuits A and B are provided. The converter circuits A and B have circuit structures that are identical to each other. In the converter circuit A, a resonant capacitor 31, a resonant inductor 32 and a primary winding 51 of a transformer 5 are connected in series, with the two ends of the serial circuit thus achieved connected between the connecting point of switching elements 11 and 12 and one end of a source 10. The output ends of output rectifier smoothing circuits 7 and 8 are connected commonly. Resonant circuits 3 and 4 of the converter circuits A and B are connected with each other.
Claims11
A switching power supply comprising a plurality of converter circuits each having two switching elements, a transformer, a resonant circuit and an output rectifier smoothing circuit;
- wherein:
- said two switching elements in each converter circuit are connected in series to form a serial circuit of which two ends are led to a DC source to be driven alternately;
- said transformer in each converter circuit includes at least a primary winding and a secondary winding;
- said resonant circuit in each converter circuit has a resonant capacitor and a resonant inductor;
- said resonant capacitor, resonant inductor and primary winding in each converter circuit are connected in series to form a serial circuit of which two ends are connected between a connecting point of said two switching elements and one end of said serial circuit which is constituted of said two switching elements;
- said output rectifier smoothing circuit in each converter circuit is connected to said secondary winding of said transformer;
- output ends of each of said output rectifier smoothing circuits included in each of said plurality of converter circuits are connected to each other;
- and
- each of said resonant circuits included in said plurality of converter circuits are connected with each other.
Dependencies are inferred from the claim text.