CN103683952A - Parallel integrated Buck-Flyback power factor correction (PFC) converter topology - Google Patents
Parallel integrated Buck-Flyback power factor correction (PFC) converter topology Download PDFInfo
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- CN103683952A CN103683952A CN201310597600.6A CN201310597600A CN103683952A CN 103683952 A CN103683952 A CN 103683952A CN 201310597600 A CN201310597600 A CN 201310597600A CN 103683952 A CN103683952 A CN 103683952A
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- flyback
- pfc converter
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- diode
- power factor
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
The invention discloses a parallel integrated Buck-Flyback power factor correction (PFC) converter. Conventional power factor correction converters are difficult in realizing high power factor, low total harmonic distortion and high efficiency. The parallel integrated Buck-Flyback PFC converter is formed by parallelly connecting input ends of a Buck PFC converter and a Flyback PFC converter, parallelly connecting output ends of the Buck PFC converter and the Flyback PFC converter and integrating main switch tubes, thereby combining the advantages of high efficiency of the Buck PFC converter and high power factor of the Flyback PFC converter. The parallel integrated Buck-Flyback PFC converter is simple in topological structure and control and realizes characteristics of high power factor and low total harmonic distortion, and a high-performance solution is provided for application needing power factor correction.
Description
Technical field
The present invention relates to electric power and carry, 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 harmonicss 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, and it has input current for sine 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.
Yet 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.
Summary of the invention
In view of the above deficiency of prior art, the invention provides a kind of integration in parallel connection formula Buck-Flyback power factor correcting converter topology, compare traditional Buck topology, there is High Power Factor, low total harmonic distortion.
The present invention realizes the technical scheme that its goal of the invention adopts to be:
A kind of integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology, 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
o, and load R forms.Pfc converter consists of Buck pfc converter and Flyback pfc converter; Two converters share a switching tube; 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 the Flyback pfc converter a set of control circuit of converter using that is connected in parallel realizes power factor correction;
Wherein topological form is output and an input filter type altogether, and the circuit connection after 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, be therefore called high-end integration in parallel connection formula Buck-Flyback pfc converter.
The another kind of form of its topology is output plus terminal and filter anode connecting-type, and the circuit connection after 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, be beneficial to the driving of main switch, therefore claim that this kind of form is low side integration in parallel connection formula Buck-Flyback pfc converter.
The present invention 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.
Compare with existing topology, the invention has the beneficial effects as follows:
1, with respect to traditional Buck pfc converter topology, adopt integration in parallel connection formula Buck-Flyback power factor correcting converter of the present invention to reduce the harmonic wave of input current, reduced total harmonic distortion, improved power factor.
2, adopt integration in parallel connection formula Buck-Flyback power factor correcting converter of the present invention, 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 invention is simple, only with a switching tube and a set of control circuit, realizes power factor correction, and cost is low, and reliability is high.
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
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 proposes of the present invention.
Fig. 4 is the high-end type integration in parallel connection formula Buck-Flyback power factor correcting converter topology that the present invention 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 proposes of the present invention.
Fig. 6 is the embodiment mono-of integration in parallel connection formula Buck-Flyback power factor correcting converter of the present invention: 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 embodiment of the present invention one 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 a specific embodiment of the present invention, is illustrated in figure 6 power factor correction topology and control realization that voltage type PWM is controlled, and Buck inductive current is discontinuous mode, and Flyback transformer current is discontinuous mode.
Fig. 7 is that the embodiment of the present invention one is 110Vac and 220Vac at input voltage, the waveform of input current when frequency is 50Hz, input voltage and output voltage, 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, realized 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.Improved power factor.
Claims (3)
1. an integration in parallel connection formula Buck-Flyback power factor correction pfc converter is topological, and 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
o, and load R composition, it is characterized in that: pfc converter consists of Buck pfc converter and Flyback pfc converter; Two converters share a switching tube; 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 the Flyback pfc converter a set of control circuit of converter using that is connected in parallel realizes power factor correction;
Wherein topological form is output and an input filter type altogether, i.e. so-called high-end integration in parallel connection formula Buck-Flyback pfc converter mode, 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;
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 pfc converter mode, 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.
2. integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology as claimed in claim 1, is characterized in that, its control method adopts traditional PFC control mode, as voltage mode is controlled, peak-current mode is controlled.
3. integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology as claimed in claim 1 or 2, is characterized in that, its mode of operation can be divided into following situation: inductance L
bt all works in discontinuous mode with Flyback transformer; Inductance L
bwork in critical continuous conduction mode, Flyback transformer T works in discontinuous mode; Inductance L
bwork in discontinuous mode, Flyback transformer T works in critical continuous conduction mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597600.6A CN103683952B (en) | 2013-11-22 | 2013-11-22 | A kind of integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597600.6A CN103683952B (en) | 2013-11-22 | 2013-11-22 | A kind of integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology |
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| Publication Number | Publication Date |
|---|---|
| CN103683952A true CN103683952A (en) | 2014-03-26 |
| CN103683952B CN103683952B (en) | 2015-11-18 |
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944425A (en) * | 2014-04-01 | 2014-07-23 | 天津大学 | Buck type high power factor converter based on integrated controller |
| CN107863876A (en) * | 2017-11-14 | 2018-03-30 | 大连泰思曼科技有限公司 | Constant current turns constant pressure converter and constant current turns constant-voltage equipment |
| CN108667308A (en) * | 2018-06-13 | 2018-10-16 | 广州金升阳科技有限公司 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
| CN110289755A (en) * | 2019-06-26 | 2019-09-27 | 南京理工大学 | High power factor DCM Buck-Flyback pfc converter |
| CN112072945A (en) * | 2020-08-25 | 2020-12-11 | 南京工业大学 | IPOP system framework type high-voltage microsecond pulse power supply with ultrahigh repetition frequency |
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Patent Citations (7)
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| US5636114A (en) * | 1995-11-30 | 1997-06-03 | Electronic Measurements, Inc. | Lossless snubber circuit for use in power converters |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944425A (en) * | 2014-04-01 | 2014-07-23 | 天津大学 | Buck type high power factor converter based on integrated controller |
| CN107863876A (en) * | 2017-11-14 | 2018-03-30 | 大连泰思曼科技有限公司 | Constant current turns constant pressure converter and constant current turns constant-voltage equipment |
| CN107863876B (en) * | 2017-11-14 | 2020-07-07 | 大连泰思曼科技有限公司 | Converter for converting constant current into constant voltage and device for converting constant current into constant voltage |
| CN108667308A (en) * | 2018-06-13 | 2018-10-16 | 广州金升阳科技有限公司 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
| CN110289755A (en) * | 2019-06-26 | 2019-09-27 | 南京理工大学 | High power factor DCM Buck-Flyback pfc converter |
| CN110289755B (en) * | 2019-06-26 | 2021-04-06 | 南京理工大学 | DCM Buck-Flyback PFC converter with high power factor |
| CN112072945A (en) * | 2020-08-25 | 2020-12-11 | 南京工业大学 | IPOP system framework type high-voltage microsecond pulse power supply with ultrahigh repetition frequency |
| CN112072945B (en) * | 2020-08-25 | 2022-06-14 | 南京工业大学 | IPOP system framework type high-voltage microsecond pulse power supply with ultrahigh repetition frequency |
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