CN201976017U - PFC self-supply circuit - Google Patents
PFC self-supply circuit Download PDFInfo
- Publication number
- CN201976017U CN201976017U CN2011200127998U CN201120012799U CN201976017U CN 201976017 U CN201976017 U CN 201976017U CN 2011200127998 U CN2011200127998 U CN 2011200127998U CN 201120012799 U CN201120012799 U CN 201120012799U CN 201976017 U CN201976017 U CN 201976017U
- Authority
- CN
- China
- Prior art keywords
- diode
- pfc
- power supply
- pfc controller
- links
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a PFC (Power Factor Correction) self-supply circuit which comprises a PFC controller, a switch tube, a pressure-boosting module, and a power supply auxiliary module. The start end of the PFC controller is connected with a voltage input end, the driving end of the PFC controller is connected with the pressure-boosting module and the power supply auxiliary module through the switch tube, the power supply auxiliary module is connected to the power supply end of the PFC controller, and the power supply auxiliary module is a full-wave rectifying circuit. In the embodiment of the utility model, the power supply auxiliary module adopts a full-wave rectifying circuit to supply power for the PFC controller in a stable voltage, so that the power supply voltage wave is small; besides, during the stabilized voltage generating process in the circuit, no extra voltage stabilizing tube and resistor is borrowed to use, so that the circuit loss is reduced and the electrical energy utilization ratio is improved.
Description
Technical field
The utility model relates to the pfc circuit technical field, relates in particular to a kind of PFC self-powered circuit.
Background technology
Usually, power supply can produce heat when work, when converting alternating current to direct current, also can produce heat, and this just also can cause part energy to run off.Adopt PFC (Power Factor Correction, power factor correction) circuit can improve the utilization ratio of electric energy, the value of PFC is high more, illustrates that the utilization ratio of electric energy is high more, and efficient has improved, and just can save cost.
For existing P FC self-powered circuit, generally be the mode that adopts voltage multiplying rectifier, the ripple of this mode output voltage is bigger, and loss is also big, can cause the PFC value to reduce, thereby the utilance of electric energy is also reduced.
The utility model content
The utility model discloses a kind of PFC self-powered circuit, can reduce the ripple of output voltage, reduce the wastage, thereby improve the utilance of electric energy.
In order to reach the foregoing invention purpose, the utility model provides a kind of PFC self-powered circuit, described circuit comprises pfc controller, switching tube, boost module, the start end of power supply supplementary module, described pfc controller links to each other with voltage input end, the drive end of described pfc controller links to each other with described power supply supplementary module with described boost module respectively by switching tube, described power supply supplementary module links to each other with the feeder ear of described pfc controller, wherein, described power supply supplementary module is a full-wave rectifying circuit.
Particularly, described full-wave rectifying circuit comprises the transformer with an elementary winding and two secondary winding, first diode, second diode, first electric capacity, first end of described elementary winding links to each other with voltage input end, second end of described elementary winding links to each other with the drive end of pfc controller by described switching tube, the centre tap ground connection of two secondary winding of described transformer, two terminals are connected with first diode and second diode respectively, the other end parallel connection of described first diode and second diode, first branch road of drawing after the described parallel connection is by first capacity earth, and second branch road links to each other with the feeder ear of described pfc controller.
Particularly, described boost module comprises the 3rd diode, the 4th diode, thermistor, second electric capacity, described primary winding first end and second end are connected with the 3rd diode and the 4th diode respectively, pass through thermistor, second capacity earth after the other end parallel connection of described the 3rd diode and the 4th diode.
Particularly, described switching tube is a metal-oxide-semiconductor, and the grid of described metal-oxide-semiconductor links to each other with the drive end of described pfc controller, and drain electrode links to each other source ground with second end of described primary winding.
The beneficial effect of the utility model embodiment is as follows:
The disclosed PFC self-powered circuit of the utility model when system powers on by voltage input end, starts pfc controller, after the conducting of PFC output pulsed drive switching tube, is that pfc controller carries out the voltage stabilizing power supply by the power supply supplementary module; When switching tube ended, the power supply supplementary module produced high pressure by boost module and stores, for the load of circuit is powered.In the present embodiment, when input voltage was low, it is big that the duty ratio of the driving pulse of switching tube becomes, and is the voltage height that the full-wave rectifying circuit rectification goes out by the power supply supplementary module; When output voltage is high, the duty ratio of the driving pulse of switching tube diminishes, by the power supply supplementary module is that the voltage that goes out of full-wave rectifying circuit rectification is low, therefore, input voltage height or input voltage is low no matter always can rectification goes out a stable voltage by the power supply supplementary module and powers to pfc controller.Because what the power supply supplementary module adopted is full-wave rectifying circuit, so output voltage ripple is little, in addition, in the process that produces burning voltage, need not extra voltage-stabiliser tube and resistance, reduced the loss of circuit, strengthened the utilance of electric energy.
Description of drawings
Fig. 1 is the PFC self-powered circuit frame diagram of the utility model embodiment;
Fig. 2 is the PFC self-powered circuit schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Referring to Fig. 1, it is the PFC self-powered circuit frame diagram of the utility model embodiment, as shown in the figure, described circuit comprises pfc controller 11, switching tube 12, boost module 13, power supply supplementary module 14, the start end 1 of described pfc controller 11 links to each other with voltage input end 15, the drive end 2 of described pfc controller 11 links to each other with described power supply supplementary module 14 with described boost module 13 respectively by switching tube 12, described power supply supplementary module 14 links to each other with the feeder ear 3 of described pfc controller 11, wherein, described power supply supplementary module 14 is a full-wave rectifying circuit, switching tube 13 includes but not limited to metal-oxide-semiconductor, power supply supplementary module 14 links to each other with voltage input end 15, an end that is specially the primary winding of the transformer in the power supply supplementary module 14 links to each other with voltage input end 15, asks for an interview the description among the embodiment two in detail.
When system powers on by voltage input end 15, start pfc controller 11, after 12 conductings of pfc controller 11 output pulsed drive switching tubes, carry out the voltage stabilizing power supply for pfc controller 11 by power supply supplementary module 14; When switching tube 12 ended, power supply supplementary module 14 produced high pressure by boost module 13 and stores, for the load of circuit is powered.
In the present embodiment, when input voltage was low, it is big that the duty ratio of the driving pulse of switching tube 12 becomes, and is the voltage height that the full-wave rectifying circuit rectification goes out by power supply supplementary module 14; When output voltage is high, the duty ratio of the driving pulse of switching tube 12 diminishes, by power supply supplementary module 14 is that the voltage that goes out of full-wave rectifying circuit rectification is low, therefore, input voltage height or input voltage is low no matter always can rectification goes out a stable voltage by power supply supplementary module 14 and powers for pfc controller 11.Because what power supply supplementary module 14 adopted is full-wave rectifying circuit, so output voltage ripple is little, in addition, in the process that produces burning voltage, need not extra voltage-stabiliser tube and resistance, reduced the loss of circuit, strengthened the utilance of electric energy.
Embodiment 2:
Referring to Fig. 2, it is the PFC self-powered circuit schematic diagram of the utility model embodiment, as shown in the figure, described circuit comprises pfc controller, metal-oxide-semiconductor Q1, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the transformer T1 with elementary winding L 1 and two secondary winding L2, L3, temperature-sensitive electricity group NTC1, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, electricity group R1.
Please also refer to Fig. 1, wherein, metal-oxide-semiconductor Q1 is the switching tube among Fig. 1; It is full-wave rectifying circuit that transformer T1, the first diode D1, the second diode D2, first capacitor C 1 have been formed the accessory power supply module among Fig. 1; The 3rd diode D3, the 4th diode D4, temperature-sensitive electricity group NTC1 and second capacitor C 2 have been formed the boost module among Fig. 1.
The annexation of PFC self-powered circuit is as follows:
The start end STAR of pfc controller links to each other with voltage input end INPUT, the drive end DRIVER of described pfc controller links to each other with voltage input end by the elementary winding L 1 of metal-oxide-semiconductor Q1, transformer T1, first end that is specially the elementary winding L 1 of transformer T1 links to each other with voltage input end, second end of described elementary winding L 1 links to each other the source ground of metal-oxide-semiconductor Q1 by the DG of described metal-oxide-semiconductor Q1 with the drive end of pfc controller.The centre tap ground connection of transformer T1 two secondary winding L2, L3, two terminals are connected with the first diode D1 and the second diode D2 respectively, the other end parallel connection of the described first diode D1 and the second diode D2, first branch road of drawing after the described parallel connection is by first capacitor C, 1 ground connection, and second branch road links to each other with the feeder ear VCC of described pfc controller.Elementary winding L 1 first end of described transformer T1 and second end are connected with the 3rd diode D3 and the 4th diode D4 respectively, pass through thermistor NTC1, second capacitor C, 2 ground connection after the other end parallel connection of described the 3rd diode D3 and the 4th diode D4.Described circuit also comprises the 3rd capacitor C 1 and a resistance R 1, and described the 3rd capacitor C 1 links to each other other end ground connection with described resistance R 1 series connection back one end with voltage input end.
The operation principle of this PFC self-powered circuit is as follows:
When system powers on by voltage input end, start pfc controller, after the PFC output pulsed drive metal-oxide-semiconductor Q1 conducting, at the secondary winding L2 of transformer T1, square-wave voltage that L3 obtains responding to through the first diode D1, pfc controller is given in voltage direct-furnish after the second diode D2 rectification, and pfc controller is able to normal work.
When INPUT voltage is low, in order to obtain a regulated output voltage, then the duty ratio of the driving pulse of metal-oxide-semiconductor Q1 becomes big, the voltage height that is gone out by the second diode D2 rectification, the voltage that the first diode D1 rectification goes out is low, and what present on first capacitor C 1 is the high voltage that the second diode D2 rectification goes out.
This be because: Vout/Vin=1/1-D (Vout is an output voltage, and Vin is an input voltage, and D is a duty ratio), when Vin was low, then duty ratio D was big, the time of conducting is long.Because the first diode D1 secondary winding L2, the L3 number of turns that are connected with the second diode D2 are the same, the right-hand member of L3 is an end of the same name with the right-hand member of L1, and the L3 supplying time is elongated, so be worth volt/second greatly, voltage is with regard to height, the second diode D2 rectification go out the voltage height.And L2 just provides electric current when metal-oxide-semiconductor Q1 ends, so because the time that duty ratio D ends greatly is short, and L2, the L3 number of turns are the same, the voltage of induction too, the voltage that such first diode D1 puts in order out is just low.
Otherwise when Vin was high, similar above-mentioned analysis repeated no more in following process.
When INPUT is that above-mentioned Vin voltage is when high, then the duty ratio of the driving pulse of metal-oxide-semiconductor Q1 diminishes, the voltage that is gone out by the second diode D2 rectification is low, the voltage height that the first diode D1 rectification goes out, and what present on first capacitor C 1 is the low-voltage that the second diode D2 rectification goes out.So no matter INPUT is at high pressure or in low pressure, can obtain a stable voltage on first capacitor C 1 and supply with pfc controller.Because what adopt is that full-wave rectifying circuit is that pfc controller is powered, so output voltage ripple is little, need not realize voltage stabilizing, so power consumption is little by means of resistance and voltage-stabiliser tube.
Other parts of this circuit, as boost module, wherein the 3rd diode D3, temperature-sensitive voltage NTC2, second capacitor C 2, the 4th diode D4, constitute charge circuit, wherein the 4th diode D4 is a booster diode, the effect of the 3rd diode D3 auxiliary charging when powering on, the effect that temperature-sensitive electricity group NTC1 has the restriction charging current.The principle of boosting is: when metal-oxide-semiconductor Q1 conducting, INPUT gives transformer T1 energy storage by the DS of metal-oxide-semiconductor Q1, and when metal-oxide-semiconductor Q1 ended, transformer T1 released energy, and produces storage of higher pressures in C2, and the load that can be circuit is powered.
In the present embodiment, when input voltage was low, it is big that the duty ratio of the driving pulse of metal-oxide-semiconductor Q1 becomes, the voltage height that is gone out by the full-wave rectifying circuit rectification; When output voltage is high, the duty ratio of the driving pulse of metal-oxide-semiconductor Q1 diminishes, and the voltage that is gone out by the full-wave rectifying circuit rectification is low, therefore, input voltage height or input voltage is low no matter always can rectification goes out a stable voltage by full-wave rectifying circuit and powers to pfc controller.Because what circuit adopted is full-wave rectifying circuit, so output voltage ripple is little, in addition, in the process that produces burning voltage, need not extra voltage-stabiliser tube and resistance, reduced the loss of circuit, strengthened the utilance of electric energy.
Need to prove, present embodiment and the involved PFC self-powered circuit of other embodiment of the present utility model, in comprising embodiment the related electronic component, also comprise other elements known in those skilled in the art, for outstanding invention thought of the present utility model, therefore, in embodiment of the present utility model, only the element that relates to invention thought of the present utility model is described, other known in PFC self-powered circuit elements is not added give unnecessary details.
Above disclosed only is the utility model preferred embodiment, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (4)
1. PFC self-powered circuit, it is characterized in that, described circuit comprises pfc controller, switching tube, boost module, power supply supplementary module, the start end of described pfc controller links to each other with voltage input end, the drive end of described pfc controller links to each other with described power supply supplementary module with described boost module respectively by switching tube, described power supply supplementary module links to each other with the feeder ear of described pfc controller, and wherein, described power supply supplementary module is a full-wave rectifying circuit.
2. PFC self-powered circuit according to claim 1, it is characterized in that, described full-wave rectifying circuit comprises the transformer with an elementary winding and two secondary winding, first diode, second diode, first electric capacity, first end of described elementary winding links to each other with voltage input end, second end of described elementary winding links to each other with the drive end of pfc controller by described switching tube, the centre tap ground connection of two secondary winding of described transformer, two terminals are connected with first diode and second diode respectively, the other end parallel connection of described first diode and second diode, first branch road of drawing after the described parallel connection is by first capacity earth, and second branch road links to each other with the feeder ear of described pfc controller.
3. PFC self-powered circuit according to claim 2, it is characterized in that, described boost module comprises the 3rd diode, the 4th diode, thermistor, second electric capacity, described primary winding first end and second end are connected with the 3rd diode and the 4th diode respectively, pass through thermistor, second capacity earth after the other end parallel connection of described the 3rd diode and the 4th diode.
4. according to claim 2 or 3 described PFC self-powered circuits, it is characterized in that described switching tube is a metal-oxide-semiconductor, the grid of described metal-oxide-semiconductor links to each other with the drive end of described pfc controller, and drain electrode links to each other source ground with second end of described primary winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200127998U CN201976017U (en) | 2011-01-17 | 2011-01-17 | PFC self-supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200127998U CN201976017U (en) | 2011-01-17 | 2011-01-17 | PFC self-supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976017U true CN201976017U (en) | 2011-09-14 |
Family
ID=44581115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200127998U Expired - Fee Related CN201976017U (en) | 2011-01-17 | 2011-01-17 | PFC self-supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201976017U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305455A (en) * | 2014-06-30 | 2016-02-03 | 欧普照明股份有限公司 | Power factor correction circuit (PFC) |
| CN111614261A (en) * | 2015-05-01 | 2020-09-01 | 虹冠电子工业股份有限公司 | Switching power supply and improvements thereof |
-
2011
- 2011-01-17 CN CN2011200127998U patent/CN201976017U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305455A (en) * | 2014-06-30 | 2016-02-03 | 欧普照明股份有限公司 | Power factor correction circuit (PFC) |
| CN105305455B (en) * | 2014-06-30 | 2019-11-22 | 欧普照明股份有限公司 | A kind of circuit of power factor correction |
| CN111614261A (en) * | 2015-05-01 | 2020-09-01 | 虹冠电子工业股份有限公司 | Switching power supply and improvements thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103633842B (en) | A kind of Single switch oppositely exports secondary molded breadth gain changer | |
| CN207304403U (en) | A kind of Switching Power Supply | |
| CN103490622B (en) | A kind of Single-switch high-gain boost converter | |
| CN101865980A (en) | Method for aging of low-voltage, high-current and non-isolated DC-DC power supply | |
| CN203368326U (en) | Boost circuit and LED driving power supply | |
| CN102148566B (en) | Boost-type voltage balance converter | |
| CN103095134A (en) | Active network boost converter | |
| CN105939107A (en) | Hybrid type quasi-switch voltage-boosting DC-DC converter | |
| KR20080065817A (en) | Photovoltaic system using step-up converter | |
| CN201976017U (en) | PFC self-supply circuit | |
| CN205847086U (en) | A kind of switching capacity type high-gain quasi-Z source DC DC changer | |
| CN204993097U (en) | Turn over and swash formula alternately load regulation switching power supply and TV | |
| CN203434859U (en) | Pseudo continuous work high-gain boost DC-DC converter | |
| CN203590025U (en) | Single-switch high-gain boost converter | |
| CN105099162A (en) | Composite type high-efficiency power factor correction circuit | |
| CN204967611U (en) | Compound high -efficient power factor correction circuit | |
| CN103441668A (en) | High-gain boost DC-DC converter allowing pseudo continuous work | |
| CN115276202A (en) | Photovoltaic energy storage power supply circuit, method and storage medium | |
| CN104049559A (en) | Load control circuit and device | |
| CN203015174U (en) | Led drive circuit | |
| CN203788155U (en) | DC boost circuit structure of miniwatt photovoltaic inverter | |
| CN109713896B (en) | High-gain boost converter with inverse square characteristic and control method thereof | |
| CN202111908U (en) | LED drive circuit possessing capacitance voltage-multiplying effect | |
| CN202282641U (en) | Power supply circuit for high-frequency ignition of integrated stove | |
| CN201656530U (en) | Fast response circuit with adjustable charging current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20190117 |