CN202068324U - Passive power factor correction (PFC) circuit - Google Patents
Passive power factor correction (PFC) circuit Download PDFInfo
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- CN202068324U CN202068324U CN2011201286046U CN201120128604U CN202068324U CN 202068324 U CN202068324 U CN 202068324U CN 2011201286046 U CN2011201286046 U CN 2011201286046U CN 201120128604 U CN201120128604 U CN 201120128604U CN 202068324 U CN202068324 U CN 202068324U
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- diode
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- high frequency
- bridge rectifier
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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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Abstract
The utility model provides a passive power factor correction (PFC) circuit. A first electrolytic capacitor negative electrode is connected with a fifth diode negative electrode, a fifth diode positive electrode is connected with a negative electrode of the output end of a bridge rectifier circuit, a seventh diode negative electrode is connected with a positive electrode of the output end of the bridge rectifier circuit, and a seventh diode positive electrode is connected with a second electrolytic capacitor positive electrode. The second electrolytic capacitor negative electrode is connected with the negative electrode of the output end of the bridge rectifier circuit, a sixth diode positive electrode is connected with the first electrolytic capacitor negative electrode, a sixth diode negative electrode is connected with the second electrolytic capacitor positive electrode, one end of a first high frequency absorption circuit is connected with the first electrolytic capacitor negative electrode, and the other end of the first high frequency absorption circuit is connected with the negative electrode of the output end of the bridge rectifier circuit. One end of a second high frequency absorption circuit is connected with the positive electrode of the output end of the bridge rectifier circuit, and the other end of the second high frequency absorption circuit is connected with the second electrolytic capacitor positive electrode.
Description
Technical field
The utility model relates to a kind of circuit, relates in particular to passive pfc circuit.
Background technology
As shown in Figure 1, passive pfc circuit is simple, and reliability height, cost are low, and power factor can reach more than 0.9, and good usability is arranged.PFC is a very important parameter in the computer power, and full name is the computer power factor (PF), abbreviates PFC as, equals " apparent power multiply by power factor (PF) ", that is: power factor (PF)=actual power/apparent power.The distortion of passive power factor circuit input current harmonics is bigger, THD is generally more than 5% in input, reverse conduction THD is more than 10%, in addition because the boosting of circuit, the overshoot voltage of switch transformer is higher, the reverse withstand voltage of adjuster generally requires more than the 800V, and the power-efficient below the power output 30W is generally the highest can only accomplish 82～85%.
The utility model content
In order to solve the problems of the prior art, the utility model provides a kind of passive pfc circuit.
The utility model provides a kind of passive pfc circuit, comprise bridge rectifier, the first high frequency absorption circuit, the second high frequency absorption circuit, first electrochemical capacitor, second electrochemical capacitor, the 5th diode, the 6th diode, the 7th diode, described bridge rectifier output head anode links to each other with described first electrochemical capacitor is anodal, the described first electrochemical capacitor negative pole links to each other with the 5th diode cathode, described the 5th diode cathode links to each other with described bridge rectifier negative pole of output end, described the 7th diode cathode links to each other with described bridge rectifier output head anode, described the 7th diode cathode links to each other with second electrochemical capacitor is anodal, the described second electrochemical capacitor negative pole links to each other with described bridge rectifier negative pole of output end, described the 6th diode cathode links to each other with the described first electrochemical capacitor negative pole, described the 6th diode cathode links to each other with described second electrochemical capacitor is anodal, the described first high frequency absorption circuit, one end links to each other with the described first electrochemical capacitor negative pole, the described first high frequency absorption circuit other end links to each other with described bridge rectifier negative pole of output end, the second high frequency absorption circuit, one end links to each other with described bridge rectifier output head anode, and the described second high frequency absorption circuit other end links to each other with described second electrochemical capacitor is anodal.
As further improvement of the utility model, the described first high frequency absorption circuit is composed in parallel by first resistance and first electric capacity.
As further improvement of the utility model, the described second high frequency absorption circuit is composed in parallel by second resistance and second electric capacity.
As further improvement of the utility model, this passive pfc circuit also comprises first diode, second diode, the 3rd diode, the 4th diode, and described bridge rectifier is made up of described first diode, described second diode, described second triode, described the 4th diode.
The beneficial effects of the utility model are: by the first high frequency absorption circuit and the second high frequency absorption circuit, reverse conduction THD is reduced to below 7%, adjusting pipe drain electrode crest voltage drops to below the 500V, the power-efficient of actual measurement power output 20W can reach 88%, power factor actual measurement 0.93, the temperature rise of adjusting pipe, switch transformer all descends more than 5 ℃, and this passive pfc circuit has improved the multinomial performance index of circuit, and reliability is effectively improved.
Description of drawings
Fig. 1 is existing passive pfc circuit.
Fig. 2 is an electrical block diagram of the present utility model.
Embodiment
As shown in Figure 2, the utility model discloses a kind of passive pfc circuit, comprise bridge rectifier, the first high frequency absorption circuit, the second high frequency absorption circuit, the first electrochemical capacitor C1, the second electrochemical capacitor C2, the 5th diode VD5, the 6th diode VD6, the 7th diode VD7, described bridge rectifier output head anode links to each other with the described first electrochemical capacitor C1 is anodal, the described first electrochemical capacitor C1 negative pole links to each other with the 5th diode VD5 negative pole, described the 5th diode VD5 positive pole links to each other with described bridge rectifier negative pole of output end, described the 7th diode VD7 negative pole links to each other with described bridge rectifier output head anode, described the 7th diode VD7 positive pole links to each other with the second electrochemical capacitor C2 is anodal, the described second electrochemical capacitor C2 negative pole links to each other with described bridge rectifier negative pole of output end, described the 6th diode VD6 positive pole links to each other with the described first electrochemical capacitor C1 negative pole, described the 6th diode VD6 negative pole links to each other with the described second electrochemical capacitor C2 is anodal, the described first high frequency absorption circuit, one end links to each other with the described first electrochemical capacitor C1 negative pole, the described first high frequency absorption circuit other end links to each other with described bridge rectifier negative pole of output end, the second high frequency absorption circuit, one end links to each other with described bridge rectifier output head anode, and the described second high frequency absorption circuit other end links to each other with the described second electrochemical capacitor C2 is anodal.
The described first high frequency absorption circuit is composed in parallel by first resistance R 1 and first capacitor C 3.
The described second high frequency absorption circuit is composed in parallel by second resistance R 2 and second capacitor C 4.
This passive pfc circuit also comprises the first diode VD1, the second diode VD2, the 3rd diode VD3, the 4th diode VD4, and described bridge rectifier is made up of the described first diode VD1, the described second diode VD2, the described second triode VD3, described the 4th diode VD4.
By the first high frequency absorption circuit and the second high frequency absorption circuit, reverse conduction THD is reduced to below 7%, adjusting pipe drain electrode crest voltage drops to below the 500V, the power-efficient of actual measurement power output 20W can reach 88%, power factor actual measurement 0.93, the temperature rise of adjusting pipe, switch transformer all descends more than 5 ℃, and this passive pfc circuit has improved the multinomial performance index of circuit, and reliability is effectively improved.THD is a total harmonic distortion.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (4)
1. passive pfc circuit, it is characterized in that: comprise bridge rectifier, the first high frequency absorption circuit, the second high frequency absorption circuit, first electrochemical capacitor, second electrochemical capacitor, the 5th diode, the 6th diode, the 7th diode, described bridge rectifier output head anode links to each other with described first electrochemical capacitor is anodal, the described first electrochemical capacitor negative pole links to each other with the 5th diode cathode, described the 5th diode cathode links to each other with described bridge rectifier negative pole of output end, described the 7th diode cathode links to each other with described bridge rectifier output head anode, described the 7th diode cathode links to each other with second electrochemical capacitor is anodal, the described second electrochemical capacitor negative pole links to each other with described bridge rectifier negative pole of output end, described the 6th diode cathode links to each other with the described first electrochemical capacitor negative pole, described the 6th diode cathode links to each other with described second electrochemical capacitor is anodal, the described first high frequency absorption circuit, one end links to each other with the described first electrochemical capacitor negative pole, the described first high frequency absorption circuit other end links to each other with described bridge rectifier negative pole of output end, the second high frequency absorption circuit, one end links to each other with described bridge rectifier output head anode, and the described second high frequency absorption circuit other end links to each other with described second electrochemical capacitor is anodal.
2. passive pfc circuit according to claim 1 is characterized in that: the described first high frequency absorption circuit is composed in parallel by first resistance and first electric capacity.
3. passive pfc circuit according to claim 2 is characterized in that: the described second high frequency absorption circuit is composed in parallel by second resistance and second electric capacity.
4. according to each described passive pfc circuit of claim 1 to 3, it is characterized in that: this passive pfc circuit also comprises first diode, second diode, the 3rd diode, the 4th diode, and described bridge rectifier is made up of described first diode, described second diode, described second triode, described the 4th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201286046U CN202068324U (en) | 2011-04-27 | 2011-04-27 | Passive power factor correction (PFC) circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201286046U CN202068324U (en) | 2011-04-27 | 2011-04-27 | Passive power factor correction (PFC) circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202068324U true CN202068324U (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201286046U Expired - Fee Related CN202068324U (en) | 2011-04-27 | 2011-04-27 | Passive power factor correction (PFC) circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202068324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916028A (en) * | 2013-01-08 | 2014-07-09 | 海信科龙电器股份有限公司 | Circuit capable of increasing conduction angle of bridge rectifier |
-
2011
- 2011-04-27 CN CN2011201286046U patent/CN202068324U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916028A (en) * | 2013-01-08 | 2014-07-09 | 海信科龙电器股份有限公司 | Circuit capable of increasing conduction angle of bridge rectifier |
| CN103916028B (en) * | 2013-01-08 | 2017-10-10 | 海信科龙电器股份有限公司 | A kind of circuit for improving the rectifier bridge stack angle of flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20130427 |