DC VOLTAGE CONVERTER WITH ACTIVE CLAMPING Russian patent published in 2025 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly DC-to-DC voltage converters and can be used in secondary power supply systems for converting, controlling and stabilizing DC output voltage. In device beginning of transformer 2 primary winding 1 is connected to input DC voltage source positive pole, and the end of primary winding 1 through power control switch 3, implemented in the form of a MOSFET field-effect transistor, is connected to the input DC voltage source negative pole. Parallel to primary winding 1 of transformer 2 there connected is clamping element made of in-series connected capacitor 4 and additional switch 5 implemented in the form of MOSFET field-effect transistor. Beginning of first secondary winding 6 is connected to end of second secondary winding 7. End of first secondary winding 6 is connected to cathode of diode 8, and beginning of second secondary winding 7 is connected to cathode of diode 9, anodes of diodes 8 and 9 are combined into common connection point. Common connection points of the beginning of secondary winding 6 and end of winding 7 of transformer 2 and common connection points of anodes of diodes 8 and 9 are connected to input of L-shaped LC-filter 10, in parallel to output terminals of which load 11 is connected. Control electrodes of switches 3, 5 are connected to pulse-width controller 12. In series with inductance of L-shaped LC-filter there connected is demagnetizing winding 13 of transformer 2, which is connected with its end to inductance of L-shaped LC-filter 10, and with its beginning – to filter capacitor.

EFFECT: generation of DC output voltage from DC input voltage, elimination of a gap in a transformer core and reduction of static power losses.

1 cl, 1 dwg