CN104466978B - Buck-type power factor correction circuit - Google Patents
Buck-type power factor correction circuit Download PDFInfo
- Publication number
- CN104466978B CN104466978B CN201410652669.9A CN201410652669A CN104466978B CN 104466978 B CN104466978 B CN 104466978B CN 201410652669 A CN201410652669 A CN 201410652669A CN 104466978 B CN104466978 B CN 104466978B
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- China
- Prior art keywords
- output capacitance
- power factor
- factor correction
- output
- anode
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4275—Arrangements for improving power factor of AC input by adding an auxiliary output voltage in series to the input
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The present invention relates to circuit of power factor correction, it is desirable to provide a kind of buck-type power factor correction circuit.The present invention includes Buck circuit of power factor correction, and its DC output end is the first output capacitance Co1；Increase the assists winding Lw2 of a coupling on the inductance of Buck circuit of power factor correction, and connected with a diode D2 with assists winding Lw2 for rectification, its DC output end is the second output capacitance Co2；Second output capacitance Co2 connects with the first output capacitance Co1, and two ends of the load Load then with the output capacitance tandem compound connect.The present invention proposes a kind of new buck-type power factor correction circuit；Not only output voltage stress is less than the peak value of input voltage, and low compared to tradition Buck type circuit of power factor correction input current harmonic contents, and the selection of output voltage is more flexible, is adapted to the variable application scenario of output voltage, improves power factor.
Description
Technical field
The present invention relates to circuit of power factor correction, be especially applicable to high efficiency, low Harmonics of Input power because
The buck-type power factor correction circuit of number correction occasion.
Background technology
Because the non-linear element and energy-storage travelling wave tube in current most of electrical equipments can send out input AC current waveform
Raw Severe distortion, net side input power factor is very low, to meet international standard IEC61000-3-2 harmonic requirement, it is necessary at this
PFC (Power factor correction, PFC) circuit is added in a little electrical equipments.In high-power LED illumination
Because LED module voltage is different under application scenario, and lamp applications are in country variant area, therefore have wide scope defeated
Enter, the pfc circuit of output voltage is necessary.
Traditional APFC is typically using boosting (Boost) topology, because there is Boost control to hold
Easily, power factor simple and that switch, input current are can be carried out in whole power frequency period is driven close to 1
Advantage, but have the shortcomings that output voltage is high in wide scope input section (90Vac-265Vac) Boost circuit.Traditional has
The circuit topology of wide output voltage range has buck-boost, flyback, SEPIC, Cuk circuit, but there is voltage, electric current
The problem of stress is high, output voltage is reverse.Although common Buck types PFC topology results in higher input power
Factor, and the voltage stress (such as Fig. 1) of outlet side can also be reduced.But, in Buck circuit of power factor correction, output
The voltage of side decides the dead time of input current, and higher output voltage can cause the higher hamonic wave in input current to contain
Amount increase (such as Fig. 2), it is difficult to pass through Class C harmonic standard.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art there is provided a kind of buck-type power factor school
Positive circuit.The circuit is that a kind of buck-type power factor correction that can decouple in the dead band of input side electric current with output voltage is opened up
Flutter, so as to obtain low harmonic current content and more flexible output voltage.
To solve the above problems, the solution of the present invention is：
A kind of buck-type power factor correction circuit, including Buck circuit of power factor correction, its DC output end are provided
For the first output capacitance Co1；Increase the assists winding Lw2 of a coupling on the inductance of Buck circuit of power factor correction, and
Connected with a diode D2 with assists winding Lw2 for rectification, its DC output end is the second output capacitance Co2；Second is defeated
Go out electric capacity Co2 to connect with the first output capacitance Co1, two ends of the load Load then with the output capacitance tandem compound connect.
As an improvement, the inductance of Buck circuit of power factor correction of the present invention is a coupling inductance, is had
The assists winding Lw1 and assists winding Lw2 intercoupled；The concrete structure of the circuit is：Input ac voltage Vac is through two poles
Pipe commutated network B1 is connected to electric capacity Cin two ends, and electric capacity Cin anode is connected to diode D1 negative electrode and the first output electricity simultaneously
Hold Co1 anode, electric capacity Cin negative terminal is connected to switch S 1 No. 2 ends；Diode D1 anode is connected to assists winding Lw1 simultaneously
No. 1 of S1 end of Same Name of Ends and switch, assists winding Lw1 non-same polarity be connected to simultaneously the first output capacitance Co1 negative terminal and
Second output capacitance Co2 anode；The assists winding Lw2 anode of the same name for terminating to the second output capacitance Co2, assists winding
Lw2 non-same polarity is connected to diode D2 negative electrode, and diode D2 anode is connected to the second output capacitance Co2 negative terminal；Output
Electric capacity Co is connected in parallel on the first output capacitance Co1 anode and the second output capacitance Co2 negative terminal, load Load then with output capacitance
Co is in parallel.
As an improvement, the inductance of Buck circuit of power factor correction of the present invention is a coupling inductance, is had
The assists winding Lw1 and assists winding Lw2 intercoupled；The concrete structure of the circuit is：Input ac voltage Vac is through two poles
Pipe commutated network B1 is connected to electric capacity Cin two ends, and electric capacity Cin negative terminal is connected to diode D1 anode and the first output electricity simultaneously
Hold Co1 negative terminal, electric capacity Cin No. 1 end for just terminating to switch S 1；Diode D1 negative electrode is connected to assists winding Lw1 simultaneously
No. 2 of S1 ends of non-same polarity and switch, assists winding Lw1 Same Name of Ends be connected to simultaneously the first output capacitance Co1 anode and
Second output capacitance Co2 negative terminal；Assists winding Lw2 non-same polarity is connected to the second output capacitance Co2 negative terminal, assists winding
The Lw2 anode of the same name for terminating to diode D2, diode D2 negative electrode is connected to the second output capacitance Co2 anode；Output electricity
Hold Co and be connected in parallel on the first output capacitance Co1 negative terminal and the second output capacitance Co2 anode, load Load then with output capacitance Co
It is in parallel.
The realization principle of the present invention is as follows：
By increasing assists winding Lw2 on the inductance of Buck circuits, and series diode D2 progress is whole on winding Lw2
Stream, obtains second direct current output Vo2, and is connected with the direct current output Vo1 of first Buck circuit, obtains total output
Vo is Vo1 and Vo2 sums；Because Vo2 and Vo1 output voltage ratio can be adjusted by adjusting Lw2 and Lw1 turn ratio n
It is whole, thus very flexible total output voltage Vo can be obtained under conditions of keeping Vo1 constant；Or keeping the total electricity of output
It under conditions of pressing Vo constant, can easily change n design load, change Vo1 value；Due to the dead time of input current
Depending on input voltage vin and the first output voltage Vo1, therefore can be according to the power factor harmonic content of required satisfaction
It is required that designing Vo1 magnitude of voltage, and total output voltage Vo of needs is obtained by n, accordingly, the input in circuit of the present invention is electric
The deadband angle of stream with total output Vo changes, does not realize the decoupling of input current dead band and output voltage.
Compared with prior art, the beneficial effects of the invention are as follows：
1) power factor of input is improved, harmonic content is reduced；
2) switching device voltage stress is low；
3) need not reduce output voltage can just reduce the electric current dead time of input；
4) dead time inputted such as electric current is decoupled with output voltage；
5) design of output voltage is more flexible；
6) control strategy need not be changed, circuit is simple, easy to control.
In summary, the present invention proposes a kind of new buck-type power factor correction circuit；Not only output voltage should
Power is less than the peak value of input voltage, and low compared to tradition Buck type circuit of power factor correction input current harmonic contents,
The selection of output voltage is more flexible, is adapted to the variable application scenario of output voltage, improves power factor.
Brief description of the drawings
Fig. 1 tradition Buck circuit of power factor correction；
The input current of Fig. 2 tradition Buck circuit of power factor correction and input voltage and the schematic diagram of output voltage；
Fig. 3 Novel power factor correction circuits proposed by the present invention；
The relation of input current and output voltage in Fig. 4 present invention；
Fig. 5 another embodiment of the invention.
Embodiment
Below by specific example with reference, the present invention will be further described.
Reference picture 3, input ac voltage Vac is connected to the input of diode rectification network B 1, and B1 output plus terminal is connected to
Electric capacity Cin anode, B1 output negative terminal is connected to electric capacity Cin negative terminal；Cin anode is connected to diode D1 negative electrode simultaneously,
D1 anode is connected to No. 1 of S1 end of switch, No. 2 of S1 terminate to electric capacity Cin negative terminal；Diode D1 anode is also coupled to simultaneously
The winding Lw1 of coupling inductance Same Name of Ends, the another of Lw1 terminates to output capacitance Co1 negative terminal, while being connected to Co2 anode；
The Lw2 anode of the same name for terminating to Co2, another negative electrode for terminating to diode D2, D2 anode is connected to Co2 negative terminal；Output
Electric capacity Co is connected in parallel on Co1 anode and Co2 negative terminal.Load Load in parallel with Co.
Reference picture 5, input ac voltage Vac is connected to the input of diode rectification network B 1, and B1 output plus terminal is connected to
Electric capacity Cin anode, B1 output negative terminal is connected to electric capacity Cin negative terminal；Cin No. 1 that just terminates to switch end, No. 2 of S1
Diode D1 negative electrode is terminated to, D1 anode is connected to input capacitance Cin negative terminal；D1 negative electrode is connected to coupling inductance simultaneously
Winding Lw1 one end, the other end (Same Name of Ends) is connected to output capacitance Co1 anode, and Co1 negative terminal is connected to diode D1 sun
Pole；The Co1 negative terminal for just terminating to Co1, the Co2 negative electrode for just terminating to diode D2, D2 anode is connected to the same of winding Lw2
Name end, Lw2 another negative terminal for terminating to Co2.Output capacitance Co is connected in parallel on Co1 negative terminal and Co2 anode, and load Load is simultaneously
It is associated in Co.
It is to be understood that：Listed above is only the specific embodiment of the present invention.It is clear that the invention is not restricted to more than
Embodiment, can also there is many deformations.One of ordinary skill in the art directly can export or join from present disclosure
All deformations expected, are considered as the protection domain of invention.
Claims (2)
1. a kind of buck-type power factor correction circuit, including Buck circuit of power factor correction, its DC output end are first
Output capacitance Co1；Characterized in that, the inductance of the Buck circuit of power factor correction is a coupling inductance, with mutual
The assists winding Lw1 and assists winding Lw2 of coupling, and connected with a diode D2 with assists winding Lw2 for rectification, its is straight
Stream output end is the second output capacitance Co2；Second output capacitance Co2 connects with the first output capacitance Co1, load Load then with this
The two ends of output capacitance tandem compound connect；
The inductance of the Buck circuit of power factor correction is a coupling inductance, with the assists winding Lw1 that intercouples and
Assists winding Lw2；The concrete structure of the circuit is：Input ac voltage Vac is connected to electric capacity Cin through diode rectification network B 1
Two ends, electric capacity Cin anode is connected to diode D1 negative electrode and the first output capacitance Co1 anode simultaneously, and electric capacity Cin's is negative
Terminate to switch S1 No. 2 ends；Diode D1 anode is connected to assists winding Lw1 Same Name of Ends and switch S1 No. 1 end simultaneously,
Assists winding Lw1 non-same polarity is connected to the first output capacitance Co1 negative terminal and the second output capacitance Co2 anode simultaneously；It is auxiliary
The winding Lw2 anode of the same name for terminating to the second output capacitance Co2 is helped, assists winding Lw2 non-same polarity is connected to diode D2
Negative electrode, diode D2 anode is connected to the second output capacitance Co2 negative terminal；Output capacitance Co is connected in parallel on the first output capacitance
The negative terminal of Co1 anode and the second output capacitance Co2, load Load is then in parallel with output capacitance Co.
2. a kind of buck-type power factor correction circuit, including Buck circuit of power factor correction, its DC output end are first
Output capacitance Co1；Characterized in that, the inductance of the Buck circuit of power factor correction is a coupling inductance, with mutual
The assists winding Lw1 and assists winding Lw2 of coupling, and connected with a diode D2 with assists winding Lw2 for rectification, its is straight
Stream output end is the second output capacitance Co2；Second output capacitance Co2 connects with the first output capacitance Co1, load Load then with this
The two ends of output capacitance tandem compound connect；
The inductance of the Buck circuit of power factor correction is a coupling inductance, with the assists winding Lw1 that intercouples and
Assists winding Lw2；The concrete structure of the circuit is：Input ac voltage Vac is connected to electric capacity Cin through diode rectification network B 1
Two ends, electric capacity Cin negative terminal is connected to diode D1 anode and the first output capacitance Co1 negative terminal simultaneously, and electric capacity Cin is just
Terminate to switch S1 No. 1 end；Diode D1 negative electrode is connected to assists winding Lw1 non-same polarity and switchs No. 2 of S1 simultaneously
End, assists winding Lw1 Same Name of Ends is connected to the first output capacitance Co1 anode and the second output capacitance Co2 negative terminal simultaneously；It is auxiliary
Winding Lw2 non-same polarity is helped to be connected to the second output capacitance Co2 negative terminal, the of the same name of assists winding Lw2 terminates to diode D2
Anode, diode D2 negative electrode is connected to the second output capacitance Co2 anode；Output capacitance Co is connected in parallel on the first output capacitance
The anode of Co1 negative terminal and the second output capacitance Co2, load Load is then in parallel with output capacitance Co.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652669.9A CN104466978B (en) | 2014-11-17 | 2014-11-17 | Buck-type power factor correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652669.9A CN104466978B (en) | 2014-11-17 | 2014-11-17 | Buck-type power factor correction circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104466978A CN104466978A (en) | 2015-03-25 |
| CN104466978B true CN104466978B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410652669.9A Active CN104466978B (en) | 2014-11-17 | 2014-11-17 | Buck-type power factor correction circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207472A (en) * | 2015-10-27 | 2015-12-30 | 杰华特微电子（杭州）有限公司 | Circuit used for boosting buck output voltage |
| CN109889060A (en) * | 2018-10-09 | 2019-06-14 | 南京博兰得电能技术发展有限公司 | The AC-DC isolated converter of high power density |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2959365B1 (en) * | 2010-04-26 | 2012-04-20 | Mge Ups Systems | CONVERTER DEVICE AND POWER SUPPLY WITHOUT INTERRUPTION EQUIPPED WITH SUCH A DEVICE |
| CN203617902U (en) * | 2013-12-09 | 2014-05-28 | 杭州士兰微电子股份有限公司 | Integrated buck-flyback type high power factor constant current circuit and device |
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| CN104466978A (en) | 2015-03-25 |
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