PUSH-PULL DC VOLTAGE CONVERTER WITH CURRENT DOUBLING Russian patent published in 2024 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to push-pull DC voltage converters, and can be used in secondary power supply systems for conversion, stabilization and control of constant output voltage, galvanically separated from input constant voltage. Device comprises power transformer 2, in which the beginning of first primary winding 1 is connected to the positive terminal of the input DC voltage source, and the end of first primary winding 1 through power control key 3, made on a field-effect transistor MOSFET, is connected to the negative terminal of the input DC voltage source, which forms a common bus. Capacitor 4 is connected to the common point of connection of first control switch 3 with the end of first primary winding 1, the second pole of which is connected to the end of second primary winding 5, the beginning of which is connected to a common bus. To the common point of connection of capacitor 4 with the end of second primary winding 5 the second power control switch 6 is connected, made on the field-effect transistor MOSFET, the second pole of which is connected to the positive terminal of the input source of constant voltage. Parallel to secondary winding 7 of transformer 2, two linear inductors 8, 9 are connected in series, and two rectifying diodes 10, 11 are connected by anodes to the beginning and the end of secondary winding 7, cathodes of which are combined into a common point and connected to the first pole of filter capacitor 12, the second pole of which is connected to the common point of connection of linear inductances 8, 9, load 13 is connected in parallel to filter capacitor 12.

EFFECT: elimination of high-voltage surges on power control switches when they are switched off due to presence of leakage inductances on primary windings of transformer, to which power control switch are connected, simplifying the transformer and increasing the efficiency of the output circuit.

1 cl, 1 dwg