POWER FACTOR CORRECTOR WITH OPTIMIZED CONSTANT OUTPUT VOLTAGE STABILIZATION UNIT Russian patent published in 2025 - IPC H02M7/21 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to converters of alternating voltage into direct voltage, and can be used in secondary power supply systems for correction of power factor, conversion, regulation and stabilization of constant output voltage. Device comprises control key 3, implemented in the form of series opposition connection of field-effect transistors (MOSFET), the control electrodes of which are combined into a common point connected to control circuit 13, power transformer 2, primary winding 1 of which is connected to alternating voltage source through control key 3. Clamping element 4 is connected in parallel to the primary winding of transformer 2 and composed of series connection of capacitor 5 and series opposition connection of field-effect transistors (MOSFET), which control electrodes are combined into a common point connected to control circuit 14. Two secondary windings 6 and 7 of transformer 2 are combined into a common point by the beginning of winding 6 and the end of winding 7, the end of winding 6 is connected to the cathode of diode 8, and the beginning of winding 7 is connected to the cathode of diode 9, the anodes of which are combined into a common connection point. Common point of connection of windings 6, 7 is connected to the first pole of L-shaped LC-filter 10, and common point of connection of anodes 8, 9 is connected to the second pole of L-shaped LC-filter. Step-down regulator with magnetically coupled magnetic element 11 is connected in parallel to the output terminals of L-shaped LC-filter 10. First pole of the capacitor of L-shaped LC-filter 10 is connected through a linear inductance to the beginning of the first winding of the step-down regulator with magnetically coupled magnetic element 11, and the second pole of the capacitor of L-shaped LC-filter 10 is connected to the beginning of the second winding of the step-down regulator with magnetically coupled magnetic element 11. Pulse-width control controller 12 is connected to output terminals of step-down controller with magnetically coupled magnetic element 11, controller controls control transistor of step-down controller 11. Linear inductor is connected in parallel to additional winding 15 of transformer 2.

EFFECT: generation of current proportional to and in-phase with alternating input voltage, generation of constant output voltage and its stabilization, reduction of dynamic losses at switching on of keys.

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