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 has power control key 3, which is implemented in the form of anti-series 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 power control key 3 to alternating voltage source. Parallel to power control switch 3 there is winding 4 magnetically connected to winding 1, which is antiphased to winding 1 with capacitor 5 connected in series. Two secondary windings 6 and 7 of transformer 2, connected in antiphase, are connected in series through capacitor 8. Beginning of winding 6 is connected to the cathode of diode 9, the anode of which is connected to the end of winding 7. Beginning of winding 7 is connected to the anode of diode 10, the cathode of which is connected to the end of winding 6. Common point of connection of beginning of winding 6 and cathode 9 is connected through linear inductance to beginning of first winding of step-down regulator with magnetically coupled magnetic element 11, and the common point of connection of the beginning of winding 7 and the anode of diode 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, the controller controls control transistor of step-down controller with magnetically coupled magnetic element 11. Control electrodes of series-opposition switch 3 are combined into a common connection point and are connected to controller 15, the second output of which is connected to the common connection point of the series-opposition switches of the transistors of switch 3. Linear inductance 14 is connected in parallel to additional winding 13 of transformer 2.
EFFECT: optimization of constant output voltage generation unit and its stabilization.
5 cl, 2 dwg
