PUSH-PULL DC VOLTAGE CONVERTER 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 is connected through power control switch 3, made on a field-effect transistor MOSFET, to a negative terminal of an input source of constant voltage, 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 connection point of capacitor 4 with the end of second primary winding 5, second power control switch 6, made on the MOSFET field-effect transistor, is connected, which second pole is connected to positive terminal of input constant voltage source. Beginning of secondary winding 7 of transformer 2 is connected to the anode of rectifying diode 8, the cathode of which is connected to the input terminals of L-shaped LC filter 9, to the output terminals of which load 10 is connected. End of secondary winding 7 of transformer 2 is connected to the beginning of second secondary winding 11, the end of which is connected to the anode of rectifying diode 12, the cathode of which is connected to the input terminals of L-shaped LC-filter 9. Common point of connection of secondary windings 7, 11 is connected to load 10.

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 the transformer, to which power control switches are connected.

1 cl, 1 dwg