FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to AC voltage to DC voltage converters, and can be used in secondary power supply systems for power factor correction, conversion, control and stabilization of constant output voltage. Device contains power control switch 4, power transformer 2, which first primary winding is implemented in the form of two half-windings 1 and 3, each of which is accordingly connected to the drain of two transistors of the power control switch 4 and through the power control switch 4 with in-series connected linear inductance coils 14, 15 is connected to the AC voltage source. Second primary winding 5 with in-series capacitor 6 is connected in parallel to switch 4. Beginning of secondary winding 7 of transformer 2 is connected to anode of diode 8, which cathode is connected to first pole of first capacitor 9, which second pole is connected to first pole of second capacitor 10, second pole of which is connected to anode of diode 11, which cathode is connected to beginning of winding 7, end of which is connected to common connection point of capacitors 9 and 10. Common point of cathode connection of diode 8 and capacitor 9 is connected to first pole of step-down controller 12, and common connection point of anode of diode 11 and capacitor 10 is connected to second pole of step-down regulator 12. To output terminals of regulator 12 control controller 13 of pulse-width type is connected, which controls control transistor of step-down regulator 12. Diagonal of rectifier bridge 16 is connected to AC voltage source, and output terminals of rectifier bridge 16 are connected to C filter 19, which is connected to common connection point of sources of control switch 4. Parallel to container of filter 19 controller 20 of pulse-width type is connected, which output clamp is connected to common connection point of gates of control switch 4.
EFFECT: creation of conditions for realization of effective DC voltage source for electric power supply of pulse-width type controller with alternating current adjusting switch, compensation of low-frequency oscillations of alternating current mains.
1 cl, 1 dwg
