MAGNETICALLY COUPLED POWER FACTOR CORRECTOR WITH OPTIMIZED CONSTANT OUTPUT VOLTAGE STABILIZATION UNIT Russian patent published in 2025 - IPC H02M7/25 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to alternating-to-constant voltage converters, and can be used in secondary power supply systems for power factor correction, conversion, regulation and stabilization of constant output voltage. Device has power control key 3, which is 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 15. Power transformer 2, primary winding 1 of which is connected through control key 3 to alternating voltage source. Parallel to control key 3 there is winding 4 magnetically connected to winding 1, which is antiphased to winding 1, with series-connected capacitor 5. In parallel to winding 4 of transformer 2 there is a clamping element made up of series connection of capacitor 6 and series opposition connection of field-effect transistors (MOSFET) of key 7, control electrodes of which are combined into a common point connected to control circuit 16. Two secondary windings 8 and 9 of transformer 2 are combined into a common point by beginning of winding 8 and end of winding 9, end of winding 8 is connected to cathode of diode 10, and beginning of winding 9 is connected to cathode of diode 11, anodes of which are combined into common point of connection. Common point of connection of windings 8, 9 is connected to the first pole of L-shaped LC-filter 12, and common point of connection of anodes 10, 11 is connected to the second pole of L-shaped LC-filter. Step-down regulator with a magnetically coupled magnetic element 13 is connected in parallel to the output terminals of L-shaped LC-filter 12. First pole of the capacitor of L-shaped LC filter 12 is connected through a linear inductance to the beginning of the first winding of the step-down regulator with magnetically coupled magnetic element 13, and the second pole of the capacitor of L-shaped LC-filter 12 is connected to the beginning of the second winding of the step-down regulator with magnetically coupled magnetic element 13. Pulse-width control controller 14 is connected to output terminals of step-down regulator with magnetically coupled magnetic element 13, which controls the regulating transistor of step-down regulator 13. Linear inductance 18 is connected in parallel to additional winding 17 of transformer 2.

EFFECT: optimization of constant output voltage generation unit and its stabilization.

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