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AssigneeVladimir Anatolyevich POLIKARPOV
InventorsVladimir Anatolyevich POLIKARPOV, Anatoliy Grigoryevich POLIKARPOV
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The invention relates to electrical engineering, and more particularly to AC-to-DC voltage converters, and can be used in secondary power supply systems for power factor correction, conversion, and DC output voltage regulation. It is an object of the invention to form a constant output voltage from an alternating input voltage, implement galvanic isolation between input and output circuits, combine the control circuits of the counter-series connected controlled switches, improve the performance of the power factor corrector, simplify the control circuit. The claimed device contains a regulating switch (3), the control electrodes of which are combined into a common point connected to a control circuit (10), and a power transformer (2), a primary winding (1) of which is connected via the regulating switch (3) to a source of alternating voltage, and a secondary winding (4) of which is connected via rectifying diodes (5, 8) to series-connected filter capacitors (6, 7), to which a load (9) is connected in parallel. In the proposed AC-to-DC converter, the beginning of the primary winding 1 of the transformer 2 is connected to the first pole of the input AC voltage source, and the end of the primary winding 1 via the controllable counter-series connected switch 3 is connected to the second pole of the input AC voltage source. The anode of the rectifier diode 5 is connected to the beginning of the secondary winding 4 of the transformer 2, the cathode of which is connected to one of the leads of the capacitor 6. Second lead of capacitor 6 is connected to end of winding 4. The end of winding 4 is connected to one of leads of capacitor 7 whose second lead is connected to anode of rectifier diode 8 whose cathode is connected to beginning of winding 4. The load 9 is connected in parallel to the series-connected capacitors 6 and 7. The control electrodes of the counter-series connected switch 3 are combined into a common point and connected to the pulse-width controller 10, the second output of which is connected to the common connection point of switches of the counter-series connected switch 3.
The AC-to-DC voltage converter, comprising a choke, having a primary winding connected through a controlled counter-series connected switch to input terminals of the AC voltage source, rectifier diodes connected to output leads of the filter capacitor, characterized in that in order to form a constant output voltage from the alternating input voltage, perform galvanic isolation between the input and output circuits, combine the control circuit of the counter-series connected switch, improve performance of the power factor corrector and simplify the control circuit, a secondary winding implementing a transformer is introduced into the choke, which is connected through a series-connected diode to the leads of the first capacitor, through the second series-connected diode, which removes the reactive energy of the transformer, in parallel to which the load is connected, and the control electrodes of the counter-series connected switch are combined into a common connection point, to which a controller is connected, the second output of which is connected to the common connection point of switches of the counter-series connected switch.
The AC-to-DC voltage converter according to paragraph 1, characterized in that a linear inductance is connected in parallel to one of the transformer windings, for example the secondary winding.
Dependencies are inferred from the claim text.