CN1315248C - A single-stage power factor correcting circuit - Google Patents
A single-stage power factor correcting circuit Download PDFInfo
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- CN1315248C CN1315248C CNB2003101122385A CN200310112238A CN1315248C CN 1315248 C CN1315248 C CN 1315248C CN B2003101122385 A CNB2003101122385 A CN B2003101122385A CN 200310112238 A CN200310112238 A CN 200310112238A CN 1315248 C CN1315248 C CN 1315248C
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- diode
- power factor
- transformer
- input
- main transformer
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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
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The present invention relates to a single-stage power factor correction circuit which mainly comprises a rectification bridge Q, a main transformer T1, an auxiliary transformer T2, a switch tube S, an input inductor Ls, diodes D1, D2, D3, D4, D5, an input capacitor C1 and non-polar capacitor C3. The present invention realizes the function of automatic power factor correction by a voltage discontinuous operating mode of the input capacitor C1 and balances the power by taking the main transformer T1 as an inductive energy storage element. The auxiliary transformer T2, the diode D2, the diode D3 and the non-polar capacitor C3 form a nonloss buffer circuit which transfers buffered energy to an output end to overcome the loss brought by a normal lossy buffer and enhance the efficiency of a whole transducer. Due to continuous input current, higher power factor corresponding to the single-stage power factor and low harmonic content, the present invention is especially suitable for small power application occasions, and moreover, the design of an input filter is simplified.
Description
Technical field
The present invention relates to field of power electronics, more particularly, it is a kind of single-stage power factor correcting circuit.
Background technology
The extensive at present traditional often two-stage type power factor correction technology of circuit of power factor correction that adopts, but its circuit element is many, and cost is higher, and the circuit complexity, is not suitable for the middle low power application scenario.For reducing the cost of twin-stage circuit of power factor correction, people have proposed multiple single-level power factor correction technology in recent years.General single-stage power factor correcting circuit is to work in discontinuous conduction mode by the control inductive current, realizes power factor emendation function automatically.For balance input and output power, need to adopt a low frequency electric capacity to carry out storage power.Because input current is discontinuous, contains a large amount of Harmonics of Input, so need add electromagnetic interference suppression circuit at input, entire circuit is with regard to more complicated.
Summary of the invention
The present invention is a kind of single-stage power factor correcting circuit, since continuous input current, the single-level power factor height that power factor is traditional relatively, and harmonic content is less, is particularly useful for the low-power applications occasion, and it has simplified the design of input filter.
The present invention is to provide a kind of single-stage power factor correcting circuit, as shown in Figure 1, its circuit mainly comprises: rectifier bridge Q, two anti-violent change depressor T
1(main transformer) and T
2(auxiliary transformer), switching tube S, input inductance Ls, the first diode D
1, the second diode D
2, the 3rd diode D
3, the 4th diode D
4, the 5th diode D
5With input capacitance C
1, polarity free capacitor C
3The negative electrode of rectifier bridge Q links to each other with the end of input inductance Ls, the other end of input inductance Ls respectively with the first diode D
1Negative electrode, input capacitance C
1An end, main transformer T
1The end of the same name and the second diode D on former limit
2Negative electrode connect; The anode of rectifier bridge Q respectively with the first diode D
1Anode, input capacitance C
1The other end, source electrode and the auxiliary transformer T of switching tube S
2The end of the same name on former limit link to each other; Main transformer T
1The different name end on former limit link to each other the second diode D with the drain electrode of switching tube S
2Anode and the 3rd diode D
3Negative electrode connect main transformer T
1The different name end on former limit and the tie point and the second diode D between the drain electrode of switching tube S
2, the 3rd diode D
3Between tie point by polarity free capacitor C
3Be connected the 3rd diode D
3Anode and auxiliary transformer T
2The different name end on former limit connect; Main transformer T
1The end of the same name of secondary and auxiliary transformer T
2The end of the same name of secondary connect, its tie point is connected with the negative electrode of output filter circuit again; Main transformer T
1The different name end and the 4th diode D of secondary
4Anode connect auxiliary transformer T
2The different name end of secondary and the 5th diode D
5Anode connect; The 4th diode D
4Negative electrode and the 5th diode D
5Negative electrode link to each other, its tie point is connected with the anode of output filter again.Wherein, main transformer T
1Be used for storage power; Input inductance Ls, the first diode D
1, input capacitance C
1Be used to realize power factor correction.
Single-stage power factor correcting circuit of the present invention is that the principle of duality by Circuit theory is carried out dualistic transformation to the circuit of power factor correction of routine and obtained.This circuit in discontinuous conduction mode, is realized power factor emendation function by the control capacitance voltage power supply automatically.Be balance input and output power, the present invention adopts inverse-excitation type transformer T
1As perceptual energy-storage travelling wave tube; For reducing switch stress, the present invention has adopted a kind of non-loss buffer, has absorbed due to voltage spikes effectively, has also improved the efficient of converter simultaneously, and the loop of this non-loss buffer is by auxiliary transformer T
2, the second diode D
2, the 3rd diode D
3And polarity free capacitor C
3Constitute.
The invention has the advantages that the single-level power factor height that its power factor is traditional relatively, harmonic content is less, its non-loss buffer arrives output to the power transfer of buffering, overcome the conventional loss that buffer brings that diminishes, improve the efficient of whole converter, simplified the design of input filter.
Description of drawings
Fig. 1 is a circuit diagram of the present invention;
Fig. 2 is a course of work circuit diagram of the present invention;
Fig. 3 is the C of the present invention in two switch periods
1And T
1Voltage oscillogram;
Fig. 4 is the present invention's capacitor C under the power frequency pattern
1Voltage oscillogram.
Among Fig. 4: the voltage waveform after the rectification of 1-capacitance voltage waveform 2-input voltage
Embodiment
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 2 has provided course of work circuit diagram of the present invention, and in a switch periods, its course of work is as follows:
t
0～t
1, as Fig. 2 (a), switching tube S turn-offs.Input is to capacitor C
1Charge C
1Voltage linear rises.The last cycle is stored in main transformer T
1Energy pass to secondary and to the output transmission.Because T
1The existence of leakage inductance, main transformer T
1Primary current non-vanishing.The electric current flow circuits is T
1-C
3-D
2, electric current is to C
3Charge, the energy on the leakage inductance is transferred to C
3On.Simultaneously, last one-period is stored in auxiliary transformer T
2On energy pass to output by secondary.
t
1～t
2, as Fig. 2 (b), switching tube S is open-minded.Capacitor C
1Pass through T
1-S discharges.T
1Former limit on electric current linear rise T
1Play the energy storage effect.Simultaneously, C
3On energy pass through C
3-S-T
2T is passed in the loop
2Secondary.
t
2～T is as Fig. 2 (c).Capacitor C
1Discharge off, capacitor C
1Last voltage is 0.Electric current is along loop T
1-S-D
1Continue to flow D
1Play the fly-wheel diode effect.
Fig. 3 has provided C shown in Figure 1
1And T
1The oscillogram of voltage, V
C1Zero passage in each switch periods.V
C1Voltage waveform under the power frequency pattern is seen Fig. 4.If V in each switch periods
C1Mean value be linked to be curve, just just be the voltage waveform after the input voltage rectification.
Be power factor correction ability and the voltage-regulation performance of verifying single-stage power factor correcting circuit of the present invention, we have carried out relevant experiment, and adopt the current-mode control technology that this circuit is controlled.Experimental result shows that power factor and efficient reach 98% and 75% respectively.With respect to traditional single-stage pfc circuit, the single-stage power factor correcting circuit of this invention has two big advantages: the one, and the discontinuity capacitance voltage operation mode is realized High Power Factor; The 2nd, transformer has replaced storage capacitor to realize the low frequency energy storage.Because input current works in the continuous current pattern, has reduced EMI and THD, increases with respect to traditional single-stage pfc converter power factor, can be applied in some low-power applications occasions.
Claims (3)
1. a single-stage power factor correcting circuit mainly comprises: rectifier bridge (Q), main transformer (T
1), auxiliary transformer (T
2), switching tube (S), input inductance (Ls), the first diode (D
1), the second diode (D
2), the 3rd diode (D
3), the 4th diode (D
4), the 5th diode (D
5) and input capacitance (C
1), polarity free capacitor (C
3), it is characterized in that main transformer (T
1) be used for storage power, input inductance (Ls), the first diode (D
1) and input capacitance (C
1) be used to realize power factor correction, the negative electrode of described rectifier bridge (Q) links to each other with an end of input inductance (Ls), the other end of described input inductance (Ls) respectively with the first diode (D
1) negative electrode, input capacitance (C
1) an end, main transformer (T
1) the end of the same name and the second diode (D on former limit
2) negative electrode connect; The anode of rectifier bridge (Q) respectively with the first diode (D
1) anode, input capacitance (C
1) the other end, the source electrode and the auxiliary transformer (T of switching tube (S)
2) the end of the same name on former limit link to each other; Main transformer (T
1) the different name end on former limit link to each other the second diode (D with the drain electrode of switching tube (S)
2) anode and the 3rd diode (D
3) negative electrode connect main transformer (T
1) the different name end on former limit and the tie point and the second diode (D between the drain electrode of switching tube (S)
2), the 3rd diode (D
3) between tie point by polarity free capacitor (C
3) be connected the 3rd diode (D
3) anode and auxiliary transformer (T
2) the different name end on former limit connect; Main transformer (T
1) end of the same name and the auxiliary transformer (T of secondary
2) the end of the same name of secondary connect, its tie point is connected with the negative electrode of output filter circuit again; Main transformer (T
1) the different name end and the 4th diode (D of secondary
4) anode connect auxiliary transformer (T
2) the different name end and the 5th diode (D of secondary
5) anode connect; The 4th diode (D
4) negative electrode and the 5th diode (D
5) negative electrode link to each other, its tie point is connected with the anode of output filter again.
2. a kind of single-stage power factor correcting circuit according to claim 1 is characterized in that, described auxiliary transformer (T
2), the second diode (D
2), the 3rd diode (D
3) and polarity free capacitor (C
3) constituted the non-loss buffer loop.
3. a kind of single-stage power factor correcting circuit according to claim 1 is characterized in that, described main transformer (T
1) and auxiliary transformer (T
2) the anti-violent change depressor of employing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101122385A CN1315248C (en) | 2003-11-21 | 2003-11-21 | A single-stage power factor correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101122385A CN1315248C (en) | 2003-11-21 | 2003-11-21 | A single-stage power factor correcting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1545192A CN1545192A (en) | 2004-11-10 |
| CN1315248C true CN1315248C (en) | 2007-05-09 |
Family
ID=34336451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101122385A Expired - Fee Related CN1315248C (en) | 2003-11-21 | 2003-11-21 | A single-stage power factor correcting circuit |
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| Country | Link |
|---|---|
| CN (1) | CN1315248C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438286C (en) * | 2006-06-09 | 2008-11-26 | 燕山大学 | Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit |
| CN108717278B (en) * | 2018-04-03 | 2020-01-14 | 华南理工大学 | Multi-path parallel real-time digital judgment implementation method for PFC (power factor correction) rectifier module |
| KR20220067780A (en) * | 2020-11-18 | 2022-05-25 | 삼성전자주식회사 | Display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790389A (en) * | 1996-05-31 | 1998-08-04 | Virginia Power Technologies, Inc. | Consolidated soft-switching AC/DC converters |
| US5982638A (en) * | 1997-10-31 | 1999-11-09 | Astec International Limited | Single stage power converter with regenerative snubber and power factor correction |
| US6118673A (en) * | 1998-06-01 | 2000-09-12 | Virginia Power Technologies, Inc. | Single-stage AC/DC converters with saturable conductor PFC |
| US6317341B1 (en) * | 2000-11-09 | 2001-11-13 | Simon Fraidlin | Switching circuit, method of operation thereof and single stage power factor corrector employing the same |
-
2003
- 2003-11-21 CN CNB2003101122385A patent/CN1315248C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790389A (en) * | 1996-05-31 | 1998-08-04 | Virginia Power Technologies, Inc. | Consolidated soft-switching AC/DC converters |
| US5982638A (en) * | 1997-10-31 | 1999-11-09 | Astec International Limited | Single stage power converter with regenerative snubber and power factor correction |
| US6118673A (en) * | 1998-06-01 | 2000-09-12 | Virginia Power Technologies, Inc. | Single-stage AC/DC converters with saturable conductor PFC |
| US6317341B1 (en) * | 2000-11-09 | 2001-11-13 | Simon Fraidlin | Switching circuit, method of operation thereof and single stage power factor corrector employing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1545192A (en) | 2004-11-10 |
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Owner name: SHENZHEN MAOSHUO POWER SUPPLY TECHNOLOGY CO., LTD Free format text: FORMER OWNER: SOUTH CHINA UNIVERSITY OF TECHNOLOGY ADDRESS Effective date: 20081121 |
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Effective date of registration: 20081121 Address after: Shenzhen City, Nanshan District province Guangdong industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee after: Shenzhen MoSo Power Supply Technology Co., Ltd. Address before: No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: South China University of Technology |
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