LOW-VOLTAGE HALF-BRIDGE DC VOLTAGE CONVERTER Russian patent published in 2024 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to DC-to-DC converters, and can be used in secondary power supply systems for conversion, control and stabilization of constant output voltage, galvanically separated from input constant voltage. In the device, half-bridge 1, consisting of two series-connected switches 2 and 3, implemented in the form of field-effect transistors MOSFET, which control electrodes are connected to pulse-width controller 4, and two serially connected capacitors 5 and 6, is connected to source of input constant voltage. Diagonal of half-bridge 1 includes primary winding 7 of transformer 8, beginning to common point of connection of switches 2 and 3 of half-bridge, and end to common point of connection of capacitors 5 and 6 of half-bridge. End of first secondary winding 9 of transformer 8 is connected in series to the beginning of second secondary winding 10, the end of which is connected to the cathode of diode 11, and the beginning of the second secondary winding 10 is connected to the cathode of diode 12, the anodes of diodes 11 and 12 are combined into a common connection point. Beginning of secondary winding 9 of transformer 8 and common points of connection of anodes of diodes 11 and 12 are connected to input of L-shaped LC-filter 13, parallel to output terminals of which load 14 is connected.

EFFECT: formation of low-voltage constant output voltage from high-voltage constant input voltage, reduction of static and dynamic losses, simplification of synchronous rectifiers control and optimization of transformer magnetic properties.

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