MAGNETICALLY COUPLED POWER FACTOR CORRECTOR WITH CONSTANT OUTPUT VOLTAGE STABILIZATION Russian patent published in 2024 - IPC H02M7/217 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to AC-to-DC voltage converters, and can be used in secondary power supply systems for power factor correction, conversion, regulation and stabilization of constant output voltage. Device comprises a power 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 (15). Power transformer (2), primary winding (1) of which is connected to an alternating voltage source through control key (3). Parallel to control key (3) there is winding (4) magnetically connected to winding (1), which is antiphased to winding (1) with in-series 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), which control electrodes are combined into a common point connected to control circuit (16). Two secondary windings (8, 9) of transformer (2) are combined into a common point by the beginning of winding (8) and the end of winding (9), the end of winding (8) is connected to the cathode of diode (10), and the beginning of winding (9) is connected to the cathode of diode (11), the anodes of which are combined into a common connection point. 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 (13) is connected in parallel to output terminals of L-shaped LC-filter (12), pulse-width control controller (14) is connected to output terminals of which, controller controls the regulating transistor of step-down regulator (13). Linear inductor (18) is connected in parallel to additional winding (17) of transformer (2).

EFFECT: generation of continuous and in-phase current to alternating input voltage, generation of constant output voltage and its stabilization.

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