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

FIELD: electrical engineering.

SUBSTANCE: constant voltage converter with active clamping relates to electrical engineering and can be used in secondary power supply systems for conversion, regulation and stabilization of constant output voltage, which is galvanically separated from input constant voltage. Device comprises transformer 2, the beginning of primary winding 1 of which is connected to the positive pole of the input constant voltage source, and the end of primary winding 1 through power control key 3, which is implemented in the form of a field-effect transistor MOSFET, is connected to the negative pole of the input source of constant voltage. 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. Beginning of secondary winding 6 of transformer 2 is connected to the anode of rectifying diode 7, the cathode of which is connected to one of the outputs of capacitor 8, the second output of which is connected to the end of winding 6. End of winding 6 is connected to one of the outputs of capacitor 9, the second output of which is through inductance coil 10 and rectifying diode 11, the anode of which is connected to inductance coil 10, and the cathode to the beginning of second secondary winding 12, the end of which is connected to the beginning of the first secondary winding 6. Anode of shunt diode 13 is connected to the common point of connection of inductor 10 and rectifying diode 11, the cathode of which is connected to the common point of connection of the cathode of first rectifying diode 7 with the capacitor of filter 8, which is connected in series with the capacitor of filter 9, in parallel to which load 14 is connected. Control electrodes of keys 3, 5 are connected to pulse-width controller 15.

EFFECT: generation of constant output voltage from constant input voltage, provision of possibility to switch on power switch to zero current value, formation of rectangular shape of current through power control key, reduction of dynamic and static losses.

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