CN203708111U - Parallel connection integrated-type Buck-Flyback power factor correction device - Google Patents
Parallel connection integrated-type Buck-Flyback power factor correction device Download PDFInfo
- Publication number
- CN203708111U CN203708111U CN201320747139.3U CN201320747139U CN203708111U CN 203708111 U CN203708111 U CN 203708111U CN 201320747139 U CN201320747139 U CN 201320747139U CN 203708111 U CN203708111 U CN 203708111U
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- CN
- China
- Prior art keywords
- power factor
- buck
- flyback
- diode
- pfc converter
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- 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
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Abstract
The utility model discloses a parallel connection integrated-type Buck-Flyback power factor correction device. A traditional power factor correction converter is difficult to simultaneously achieve high power factor, low total harmonic distortion and high efficiency. The parallel connection integrated-type Buck-Flyback power factor correction device is formed in a manner that inputs of a Buck power factor correction (PFC) converter and a Flyback PFC converter are in parallel connection, outputs of the Buck power factor correction (PFC) converter and the Flyback PFC converter are in parallel connection, and then a main switching tube is combined; and advantages that the Buck PFC converter is high in efficiency and the Flyback PFC converter is high in power factor are combined. The converters are simple in topological structure and control, characteristics of high power factor and low total harmonic distortion are achieved, and a high performance solution is provided for applications which are required for power factor correction.
Description
Technical field
The utility model relates to electric power to be carried, especially low Harmonics of Input, low pressure output, high efficiency power factor correction technology field.
Background technology
In recent years, power electronic technology develops rapidly, becomes gradually the focus of application and research as the power technology of field of power electronics important component part.Switching Power Supply is high with its efficiency, power density is high and established its dominant position in field of power supplies, but when accessing electrical network by rectifier, it can there is a fatal weakness: power factor lower (being only generally 0.45～0.75), and in electrical network, can produce a large amount of current harmonics and reactive power and pollute electrical network.The method that suppresses Switching Power Supply generation harmonic wave mainly contains two kinds: the one, and passive means, adopts passive filtering or active filter circuit to come bypass or harmonic carcellation; The 2nd, active method, designs high-performance rectifier of new generation, it have input current for sinusoidal wave, harmonic content is low and power factor high, has power factor emendation function.Switch power supply power factor is proofreaied and correct the emphasis of research, is mainly the research of circuit of power factor correction topology and the exploitation of Power Factor Correction Control integrated circuit.The multiple power factor correcting circuit topological structures such as existing Buck, Boost, Buck-Boost.Wherein, Boost topology has to be controlled easily, drives simply, in whole power frequency period, can carry out switch, and the power factor of input current can approach the advantage such as 1; But Boost circuit has the advantages that output voltage is high, cannot realize single-stage application, and under wide region input (90Vac～265Vac) condition, can be lower than high pressure section (175Vac～265Vac) in low pressure stage (90Vac～135Vac) efficiency.And adopt Buck-Boost topology, because inductance transferring energy mode is total energy storage and release, therefore, efficiency is lower.In middle low power application scenario, Buck topology can keep high efficiency in whole input voltage range, and therefore, Buck topology is used in industrial products more and more.
But Buck topology is applied to pfc circuit, the input voltage V after rectifier bridge
gbe less than output voltage V
ointerval in, input current i
inbe zero, as shown in Figures 1 and 2, this section of Dead Time increased Harmonics of Input dramatically, affected net side input power factor.
Utility model content
In view of the above deficiency of prior art, the utility model provides a kind of integration in parallel connection formula Buck-Flyback power factor correcting, compares traditional Buck topology, has advantages of High Power Factor, low total harmonic distortion.
The utility model for the technical scheme that realizes its utility model object and adopt is:
A kind of integration in parallel connection formula Buck-Flyback power factor correction PFC device, its main circuit is by front end rectifier bridge, filter inductance L
f, filter capacitor C
f, switching tube Q, diode D
1, D
2, D
3, inductance L
b, flyback transformer T, output capacitance C
oand load R composition; it is characterized in that: this device is made up of Buck pfc converter and Flyback pfc converter; wherein the input of the input of Buck pfc converter and Flyback pfc converter is connected in parallel, and the output of the output of Buck pfc converter and Flyback pfc converter is connected in parallel;
Wherein topological form is output and an input filter type altogether, i.e. so-called high-end integration in parallel connection formula Buck-Flyback power factor correcting, and the circuit connection after its rectifying and wave-filtering is as follows: filter capacitor C
fthe drain electrode of high pressure termination switching tube Q, different name end, the diode D of the former limit of another termination transformer T winding
1anode, diode D
2anode, output capacitance C
onegative terminal and one end of load R, the source electrode of switching tube Q meets Same Name of Ends and the diode D of the former limit of transformer T winding
3anode, diode D
3negative electrode meet diode D
1negative electrode and inductance L
bone end, inductance L
bdifferent name end, the output capacitance C of another termination transformer T secondary winding
oanode and the other end of load R, diode D
2negative electrode connect the Same Name of Ends of transformer T secondary winding, because this kind of topological form main switch connects the high-pressure side of input filter;
The another kind of form of its topology is output plus terminal and filter anode connecting-type, i.e. so-called low side integration in parallel connection formula Buck-Flyback power factor correcting, and the circuit connection after its rectifying and wave-filtering is as follows: filter capacitor C
fsame Name of Ends, the diode D of the former limit of high pressure termination transformer T winding
1negative electrode, different name end, the output capacitance C of transformer T secondary winding
oanode and one end of load R, the source electrode of another termination switching tube Q, the drain electrode of switching tube Q meets different name end and the diode D of the former limit of transformer T winding
3negative electrode, diode D
3anode meet diode D
1anode and inductance L
bone end, inductance L
banother terminating diode D
2anode, output capacitance C
onegative terminal and the other end of load R, diode D
2negative electrode connect the Same Name of Ends of transformer T secondary winding.Because this kind of topological form main switch connects input filter ground.
The utility model is by inputting output-parallel in parallel integration switches pipe by Buck pfc converter and Flyback pfc converter, Buck-Flyback pfc converter after integration in parallel connection has the advantage of Buck pfc converter and Flyback pfc converter concurrently, thereby realizes High Power Factor, low total harmonic distortion and high efficiency.According to the connected mode of main switch, be divided into low side integration in parallel connection Buck-Flyback pfc converter and high-end integration in parallel connection Buck-Flyback pfc converter.Control method adopts traditional PFC control mode, as voltage mode control, peak-current mode control etc.Mode of operation has following three kinds of situations: Buck inductance and Flyback transformer all work in discontinuous mode; Buck inductance works in critical continuous conduction mode, and Flyback transformer works in discontinuous mode; Buck inductance works in discontinuous mode, and Flyback transformer works in critical continuous conduction mode.
Compared with existing topology, the beneficial effects of the utility model are:
1, with respect to traditional Buck pfc converter topology, adopt integration in parallel connection formula Buck-Flyback power factor correcting converter of the present utility model to reduce the harmonic wave of input current, reduce total harmonic distortion, improve power factor.
2, adopt integration in parallel connection formula Buck-Flyback power factor correcting converter of the present utility model, can be according to the requirement to input power factor and efficiency, the parameter of appropriate design magnetic element, the power of flexible configuration Buck pfc converter and Fyback pfc converter.
3, integration in parallel connection formula Buck-Flyback power factor correcting converter topology of the present utility model is simple, only realizes power factor correction with a switching tube and a set of control circuit, and cost is low, and reliability is high.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is Buck pfc converter topology.
Fig. 2 is Buck pfc converter input voltage and input current waveform figure.
Fig. 3 is the integration process (low side type) of the integration in parallel connection formula Buck-Flyback power factor correcting converter that the utility model proposes.
Fig. 4 is the high-end type integration in parallel connection formula Buck-Flyback power factor correcting converter topology the utility model proposes.
Fig. 5 is input voltage and the current waveform figure of the integration in parallel connection formula Buck-Flyback power factor correcting converter that the utility model proposes.
Fig. 6 is the embodiment mono-of the utility model integration in parallel connection formula Buck-Flyback power factor correcting converter: voltage mode control, Buck converter and Flyback converter are all operated in the power factor corrector of discontinuous mode, constant voltage output.
Fig. 7 is the simulation waveform of the utility model embodiment mono-under full voltage input range.Circuit parameter is as follows: L
f=2mH, C
f=1uF, L
b=120uH, C
o=1.5mF, R=64 Ω, static exciter inductance L
f=480uH, the turn ratio is 27:12, rated output voltage V
o=80V.
The initial conditions of Fig. 7 (a) is: input voltage V
in=110Vac, frequency f=50Hz.
The initial conditions of Fig. 7 (b) is: input voltage V
in=220Vac, frequency f=50Hz.
Embodiment:
Fig. 6 is an embodiment of the present utility model, is illustrated in figure 6 the power factor correction topology of voltage type PWM control and controls and realize, and Buck inductive current is discontinuous mode, and Flyback transformer current is discontinuous mode.
Fig. 7 is that the utility model embodiment mono-is 110Vac and 220Vac at input voltage, the waveform of input current, input voltage and output voltage when frequency is 50Hz, Buck inductive current, Flyback transformer primary side electric current, as can be seen from the figure, converter all can normally stably be worked in full voltage range, realize the function of power factor correction, and the interval at input voltage lower than output voltage, input current is also followed input voltage to a certain extent, compares traditional Buck PFC transformer and has reduced Harmonics of Input composition.Improve power factor.
Claims (1)
1. an integration in parallel connection formula Buck-Flyback power factor correcting, its main circuit is by front end rectifier bridge, filter inductance L
f, filter capacitor C
f, switching tube Q, diode D
1, D
2, D
3, inductance L
b, flyback transformer T, output capacitance C
oand load R composition; it is characterized in that: this device is made up of Buck pfc converter and Flyback pfc converter; wherein the input of the input of Buck pfc converter and Flyback pfc converter is connected in parallel, and the output of the output of Buck pfc converter and Flyback pfc converter is connected in parallel; Topology form is output and input filter type altogether, i.e. so-called high-end integration in parallel connection formula Buck-Flyback power factor correcting, and the circuit connection after its rectifying and wave-filtering is as follows: filter capacitor C
fthe drain electrode of high pressure termination switching tube Q, different name end, the diode D of the former limit of another termination transformer T winding
1anode, diode D
2anode, output capacitance C
onegative terminal and one end of load R, the source electrode of switching tube Q meets Same Name of Ends and the diode D of the former limit of transformer T winding
3anode, diode D
3negative electrode meet diode D
1negative electrode and inductance L
bone end, inductance L
bdifferent name end, the output capacitance C of another termination transformer T secondary winding
oanode and the other end of load R, diode D
2negative electrode connect the Same Name of Ends of transformer T secondary winding, because this kind of topological form main switch connects the high-pressure side of input filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747139.3U CN203708111U (en) | 2013-11-22 | 2013-11-22 | Parallel connection integrated-type Buck-Flyback power factor correction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320747139.3U CN203708111U (en) | 2013-11-22 | 2013-11-22 | Parallel connection integrated-type Buck-Flyback power factor correction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708111U true CN203708111U (en) | 2014-07-09 |
Family
ID=51058489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320747139.3U Withdrawn - After Issue CN203708111U (en) | 2013-11-22 | 2013-11-22 | Parallel connection integrated-type Buck-Flyback power factor correction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708111U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683952A (en) * | 2013-11-22 | 2014-03-26 | 西南交通大学 | Parallel integrated Buck-Flyback power factor correction (PFC) converter topology |
| CN108770117A (en) * | 2018-05-10 | 2018-11-06 | 四川大学 | A kind of integrated LED drive power of compatible electronic transformer |
| CN112135396A (en) * | 2020-09-29 | 2020-12-25 | 桃江凤冠电机有限公司 | Integrated LED driving power supply compatible with electronic transformer |
-
2013
- 2013-11-22 CN CN201320747139.3U patent/CN203708111U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683952A (en) * | 2013-11-22 | 2014-03-26 | 西南交通大学 | Parallel integrated Buck-Flyback power factor correction (PFC) converter topology |
| CN103683952B (en) * | 2013-11-22 | 2015-11-18 | 西南交通大学 | A kind of integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology |
| CN108770117A (en) * | 2018-05-10 | 2018-11-06 | 四川大学 | A kind of integrated LED drive power of compatible electronic transformer |
| CN112135396A (en) * | 2020-09-29 | 2020-12-25 | 桃江凤冠电机有限公司 | Integrated LED driving power supply compatible with electronic transformer |
| CN112135396B (en) * | 2020-09-29 | 2021-07-27 | 桃江凤冠电机有限公司 | Integrated LED driving power supply compatible with electronic transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |