CN104466978A - Buck type power factor correction circuit - Google Patents
Buck type power factor correction circuit Download PDFInfo
- Publication number
- CN104466978A CN104466978A CN201410652669.9A CN201410652669A CN104466978A CN 104466978 A CN104466978 A CN 104466978A CN 201410652669 A CN201410652669 A CN 201410652669A CN 104466978 A CN104466978 A CN 104466978A
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- Prior art keywords
- power factor
- output capacitance
- factor correction
- receives
- anode
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- 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
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- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to power factor correction circuits and aims to provide a buck type power factor correction circuit. The buck type power factor correction circuit includes a buck power factor correction circuit, and a first output capacitor Co1 serves as the DC output end of the buck power factor correction circuit. A coupled auxiliary winding Lw2 is additionally arranged on an inductor of the buck power factor correction circuit and connected with a diode D2 in series for rectification, and a second output capacitor Co2 serves as the DC output end of the auxiliary winding Lw2. The second output capacitor Co2 is connected with the first output capacitor Co1 in series, and a load is connected with the two ends of the combination formed by connecting the output capacitors in series. According to the novel buck type power factor correction circuit, output voltage stress is smaller than the peak value of input voltage; moreover, compared with a traditional buck type power factor correction circuit, the content of current harmonics at the input end is lower, and selection of output voltage is more flexible; accordingly, the buck type power factor correction circuit is suitable for application occasions where output voltage is variable, and power factors are increased.
Description
Technical field
The present invention relates to circuit of power factor correction, be particularly applied to the buck-type power factor correction circuit of power factor correction occasion of high efficiency, low Harmonics of Input.
Background technology
Because the non-linear element in current most of power consumption equipment and energy-storage travelling wave tube can make input AC current waveform generation Severe distortion, net side input power factor is very low, for meeting the harmonic requirement of international standard IEC61000-3-2, power factor correction (Power factor correction, PFC) circuit must be added in these power consumption equipments.Because LED module voltage is different under high-power LED illumination application scenario, and lamp applications is in country variant area, therefore has wide region input, the pfc circuit of output voltage is necessary.
Traditional APFC generally adopts boosting (Boost) topology, because Boost have control easily, drive simple and can carry out in whole power frequency period switch, input current power factor close to 1 advantage, but in wide region input section (90Vac-265Vac) Boost circuit, there is the high shortcoming of output voltage.Traditional circuit topology with wide output voltage range has buck-boost, flyback, SEPIC, Cuk circuit, but there is voltage, current stress is high, output voltage is reverse problem.Although common Buck type power factor correction topology can obtain higher input power factor, and can reduce the voltage stress (as Fig. 1) of outlet side.But, in Buck circuit of power factor correction, the voltage of outlet side decides the Dead Time of input current, higher output voltage, the higher harmonic content in input current can be caused to increase (as Fig. 2), be difficult to the harmonic standard by Class C.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, provides a kind of buck-type power factor correction circuit.This circuit be a kind of can by the buck-type power factor correction of the dead band of input side electric current and output voltage decoupling zero topology, thus obtain low harmonic current content and output voltage more flexibly.
For solving the problem, solution of the present invention is:
There is provided a kind of buck-type power factor correction circuit, comprise Buck circuit of power factor correction, its DC output end is the first output capacitance Co1; The inductance of Buck circuit of power factor correction increases the auxiliary winding L w2 of a coupling, and connects for rectification with auxiliary winding L w2 with a diode D2, its DC output end is the second output capacitance Co2; Second output capacitance Co2 connects with the first output capacitance Co1, and load Load then connects with the two ends of this output capacitance tandem compound.
Improve as one, the inductance of Buck circuit of power factor correction of the present invention is a coupling inductance, has the auxiliary winding L w1 and auxiliary winding L w2 that intercouple; The concrete structure of described circuit is: input ac voltage Vac is connected to the two ends of electric capacity Cin through diode rectification network B 1, the anode of electric capacity Cin receives the negative electrode of diode D1 and the anode of the first output capacitance Co1 simultaneously, and the negative terminal of electric capacity Cin receives No. 2 ends of switch S 1; The anode of diode D1 receives the Same Name of Ends of auxiliary winding L w1 and No. 1 end of switch S 1 simultaneously, and the non-same polarity of auxiliary winding L w1 receives the negative terminal of the first output capacitance Co1 and the anode of the second output capacitance Co2 simultaneously; The Same Name of Ends of auxiliary winding L w2 receives the anode of the second output capacitance Co2, and the non-same polarity of auxiliary winding L w2 receives the negative electrode of diode D2, and the anode of diode D2 receives the negative terminal of the second output capacitance Co2; Output capacitance Co is connected in parallel on the anode of the first output capacitance Co1 and the negative terminal of the second output capacitance Co2, and load Load is then in parallel with output capacitance Co.
Improve as one, the inductance of Buck circuit of power factor correction of the present invention is a coupling inductance, has the auxiliary winding L w1 and auxiliary winding L w2 that intercouple; The concrete structure of described circuit is: input ac voltage Vac is connected to the two ends of electric capacity Cin through diode rectification network B 1, the negative terminal of electric capacity Cin receives the anode of diode D1 and the negative terminal of the first output capacitance Co1 simultaneously, No. 1 end just terminating to switch S 1 of electric capacity Cin; The negative electrode of diode D1 receives the non-same polarity of auxiliary winding L w1 and No. 2 ends of switch S 1 simultaneously, and the Same Name of Ends of auxiliary winding L w1 receives the anode of the first output capacitance Co1 and the negative terminal of the second output capacitance Co2 simultaneously; The non-same polarity of auxiliary winding L w2 receives the negative terminal of the second output capacitance Co2, and the Same Name of Ends of auxiliary winding L w2 receives the anode of diode D2, and the negative electrode of diode D2 receives the anode of the second output capacitance Co2; Output capacitance Co is connected in parallel on the negative terminal of the first output capacitance Co1 and the anode of the second output capacitance Co2, and load Load is then in parallel with output capacitance Co.
It is of the present invention that to realize principle as follows:
By increasing auxiliary winding L w2 on the inductance of Buck circuit, and series diode D2 carries out rectification on winding L w2, obtain second direct current and export Vo2, and export Vo1 with the direct current of first Buck circuit and connect, obtaining total output Vo is Vo1 and Vo2 sum; Because the output voltage ratio of Vo2 and Vo1 can be adjusted by the turn ratio n adjusting Lw2 and Lw1, thus can keep under the condition that Vo1 is constant, obtain total output voltage Vo very flexibly; Or under keeping exporting the constant condition of total voltage Vo, the design load of n can be changed easily, change the value of Vo1; Dead Time due to input current depends on input voltage vin and the first output voltage Vo1, therefore the magnitude of voltage of Vo1 can be designed according to required satisfied power factor and harmonic wave content requirement, and total output voltage Vo of needs is obtained by n, accordingly, the deadband angle of the input current in circuit of the present invention does not export Vo change with total, achieves the decoupling zero of input current dead band and output voltage.
Compared with prior art, the invention has the beneficial effects as follows:
1) improve the power factor of input, reduce harmonic content;
2) switching device voltage stress is low;
3) the electric current Dead Time of input just can be reduced without the need to reducing output voltage;
4) by input as the Dead Time of electric current and output voltage decoupling zero;
5) design of output voltage is more flexible;
6) without the need to changing control strategy, circuit is simple, and it is convenient to control.
In sum, the present invention proposes a kind of novel buck-type power factor correction circuit; Not only output voltage stress is lower than the peak value of input voltage, and it is low to compare traditional B uck type circuit of power factor correction input current harmonic content, and choosing of output voltage is more flexible, is applicable to the application scenario that output voltage is variable, improves power factor.
Accompanying drawing explanation
Fig. 1 traditional B uck circuit of power factor correction;
The input current of Fig. 2 traditional B uck circuit of power factor correction and the schematic diagram of input voltage and output voltage;
The Novel power factor correction circuit that Fig. 3 the present invention proposes;
The relation of input current and output voltage in Fig. 4 the present invention;
Fig. 5 another embodiment of the invention.
Embodiment
Below by concrete example with reference, the present invention will be further described.
With reference to Fig. 3, input ac voltage Vac receives the input of diode rectification network B 1, and the output plus terminal of B1 receives the anode of electric capacity Cin, and the output negative terminal of B1 receives the negative terminal of electric capacity Cin; The anode of Cin receives the negative electrode of diode D1 simultaneously, and the anode of D1 receives No. 1 end of switch S 1, and No. 2 of S1 terminate to the negative terminal of electric capacity Cin; The anode of diode D1 also receives the Same Name of Ends of the winding L w1 of coupling inductance simultaneously, and the other end of Lw1 receives the negative terminal of output capacitance Co1, receives the anode of Co2 simultaneously; The Same Name of Ends of Lw2 receives the anode of Co2, and the other end receives the negative electrode of diode D2, and the anode of D2 receives the negative terminal of Co2; Output capacitance Co is connected in parallel on the anode of Co1 and the negative terminal of Co2.Load Load and Co is in parallel.
With reference to Fig. 5, input ac voltage Vac receives the input of diode rectification network B 1, and the output plus terminal of B1 receives the anode of electric capacity Cin, and the output negative terminal of B1 receives the negative terminal of electric capacity Cin; No. 1 end just terminating to switch of Cin, No. 2 of S1 terminate to the negative electrode of diode D1, and the anode of D1 receives the negative terminal of input capacitance Cin; The negative electrode of D1 receives one end of the winding L w1 of coupling inductance simultaneously, and the other end (Same Name of Ends) receives the anode of output capacitance Co1, and the negative terminal of Co1 receives the anode of diode D1; The negative terminal just terminating to Co1 of Co1, the negative electrode just terminating to diode D2 of Co2, the anode of D2 receives the Same Name of Ends of winding L w2, and the other end of Lw2 receives the negative terminal of Co2.Output capacitance Co is connected in parallel on the negative terminal of Co1 and the anode of Co2, and load Load is connected in parallel on Co.
What enumerate it is understood that above is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think the protection range invented.
Claims (3)
1. a buck-type power factor correction circuit, comprises Buck circuit of power factor correction, and its DC output end is the first output capacitance Co1; It is characterized in that, the inductance of Buck circuit of power factor correction increases the auxiliary winding L w2 of a coupling, and connect for rectification with auxiliary winding L w2 with a diode D2, its DC output end is the second output capacitance Co2; Second output capacitance Co2 connects with the first output capacitance Co1, and load Load then connects with the two ends of this output capacitance tandem compound.
2. buck-type power factor correction circuit according to claim 1, is characterized in that, the inductance of described Buck circuit of power factor correction is a coupling inductance, has the auxiliary winding L w1 and auxiliary winding L w2 that intercouple; The concrete structure of described circuit is: input ac voltage Vac is connected to the two ends of electric capacity Cin through diode rectification network B 1, the anode of electric capacity Cin receives the negative electrode of diode D1 and the anode of the first output capacitance Co1 simultaneously, and the negative terminal of electric capacity Cin receives No. 2 ends of switch S 1; The anode of diode D1 receives the Same Name of Ends of auxiliary winding L w1 and No. 1 end of switch S 1 simultaneously, and the non-same polarity of auxiliary winding L w1 receives the negative terminal of the first output capacitance Co1 and the anode of the second output capacitance Co2 simultaneously; The Same Name of Ends of auxiliary winding L w2 receives the anode of the second output capacitance Co2, and the non-same polarity of auxiliary winding L w2 receives the negative electrode of diode D2, and the anode of diode D2 receives the negative terminal of the second output capacitance Co2; Output capacitance Co is connected in parallel on the anode of the first output capacitance Co1 and the negative terminal of the second output capacitance Co2, and load Load is then in parallel with output capacitance Co.
3. buck-type power factor correction circuit according to claim 1, is characterized in that, the inductance of described Buck circuit of power factor correction is a coupling inductance, has the auxiliary winding L w1 and auxiliary winding L w2 that intercouple; The concrete structure of described circuit is: input ac voltage Vac is connected to the two ends of electric capacity Cin through diode rectification network B 1, the negative terminal of electric capacity Cin receives the anode of diode D1 and the negative terminal of the first output capacitance Co1 simultaneously, No. 1 end just terminating to switch S 1 of electric capacity Cin; The negative electrode of diode D1 receives the non-same polarity of auxiliary winding L w1 and No. 2 ends of switch S 1 simultaneously, and the Same Name of Ends of auxiliary winding L w1 receives the anode of the first output capacitance Co1 and the negative terminal of the second output capacitance Co2 simultaneously; The non-same polarity of auxiliary winding L w2 receives the negative terminal of the second output capacitance Co2, and the Same Name of Ends of auxiliary winding L w2 receives the anode of diode D2, and the negative electrode of diode D2 receives the anode of the second output capacitance Co2; Output capacitance Co is connected in parallel on the negative terminal of the first output capacitance Co1 and the anode of the second output capacitance Co2, and 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 |
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| Publication Number | Publication Date |
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| CN104466978A true CN104466978A (en) | 2015-03-25 |
| CN104466978B CN104466978B (en) | 2017-10-03 |
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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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Cited By (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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2959365A1 (en) * | 2010-04-26 | 2011-10-28 | 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 |
-
2014
- 2014-11-17 CN CN201410652669.9A patent/CN104466978B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2959365A1 (en) * | 2010-04-26 | 2011-10-28 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 杨剑友等: "恒导通时间控制的降压型高效率PFC研究", 《电力电子技术》 * |
Cited By (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 | Publication date |
|---|---|
| CN104466978B (en) | 2017-10-03 |
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