DC-DC CONVERTER WITH ACTIVE CLAMPING Russian patent published in 2023 - IPC H02M3/335 

FIELD: electrical engineering.

SUBSTANCE: DC-DC converters that can be used in secondary power supply systems for converting, regulating and stabilizing a DC output voltage, galvanically separated from the input DC voltage and reducing static and dynamic losses. The device contains transformer (1), the beginning of primary winding (2) of which is connected to the positive pole of the input constant voltage source, and the end of primary winding (1) is connected to the negative pole of the input constant voltage source through power regulating switch (3), implemented in the form of a MOSFET field-effect transistor. A clamping element consisting of series-connected capacitor (4) and additional switch (5), implemented in the form of a MOSFET field-effect transistor, is connected in parallel with primary winding (1) of transformer (2). The beginning of first secondary winding 6 is connected to the beginning of second secondary winding 7. The end of the first secondary winding is connected to the cathode of diode 8, and the end of second secondary winding 7 is connected to the cathode of diode 9, the anodes of diodes 8 and 9 are combined at a common connection point. The common starting points of the secondary windings of the transformer and the common connecting points of the anodes of diodes 8 and 9 are connected to the input of the L-shaped LC filter 10, parallel to the output terminals of which load 11 is connected. The control electrodes of keys (3, 5) are connected to pulse-width controller (12). One of the secondary windings of the transformer has more turns than the other.

EFFECT: formation of low-voltage DC output voltage from high-voltage DC input voltage and reduction of dynamic and static losses.

4 cl, 3 dwg