LOW-VOLTAGE DC VOLTAGE CONVERTER WITH ACTIVE CLAMPING 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 DC output voltage, galvanically separated from input DC voltage. In the device, the beginning of primary winding 1 of transformer 2 is connected to the positive pole of the input DC voltage source, and the end of primary winding 1 is connected to the negative pole of the input DC voltage source through power control key 3, which is implemented in the form of a field-effect transistor MOSFET. In parallel to primary winding 1 of transformer 2 there is a clamping element composed of series-connected capacitor 4 and additional key 5, implemented in the form of field-effect transistor MOSFET. End of first secondary winding 6 is connected in series with the beginning of second secondary winding 7, the end of which is connected to the cathode of diode 8, and the beginning of second secondary winding 7 is connected to the cathode of diode 9, the anodes of diodes 8 and 9 are combined into a common connection point. Beginning of secondary winding 6 of transformer 2 and the common connection point of the anodes of diodes 8 and 9 are connected to the input of L-shaped LC-filter 10, parallel to the output terminals of which load 11 is connected. Control electrodes of keys 3, 5 are connected to pulse-width controller 12.

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

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