CN101738535A - Alternating voltage zero-crossing detection circuit for power factor correction control circuit - Google Patents
Alternating voltage zero-crossing detection circuit for power factor correction control circuit Download PDFInfo
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- CN101738535A CN101738535A CN200810203187A CN200810203187A CN101738535A CN 101738535 A CN101738535 A CN 101738535A CN 200810203187 A CN200810203187 A CN 200810203187A CN 200810203187 A CN200810203187 A CN 200810203187A CN 101738535 A CN101738535 A CN 101738535A
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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
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Abstract
The invention discloses an alternating voltage zero-crossing detection circuit for a power factor correction control circuit. The power factor correction control circuit comprises a central processing unit; the alternating voltage zero-crossing detection circuit comprises a transformer, a bridge rectifier circuit, a first resistor, a second resistor, a first capacitor and an electrolysis capacitor, wherein the bridge rectifier circuit is connected with the output end of the transformer; the first resistor and the second resistor which are in serial connection are connected in parallel with the output end of the bridge rectifier circuit; the first capacitor is connected in parallel with two ends of the second resistor; and the anode of the electrolysis capacitor is connected with the output end of the bridge rectifier circuit through a diode, while the cathode is connected with the other end of the bridge rectifier circuit; the middle nodal points of the first resistor and the second resistor are connected with the base electrode of a triode; the emitting electrode of the triode is connected with the cathode of the electrolysis capacitor; the collecting electrode of the triode is connected with a third resistor and a fourth resistor; and a second capacitor is connected in series between one end of the fourth resistor connected with the central processing unit and the emitting electrode of the triode. The alternating voltage zero-crossing detection circuit has the advantages of a simple structure and can detect the zero-crossing time during inputting alternating voltage so as to ensure the same phase of input current and input voltage.
Description
Technical field
The present invention relates to a kind of alternating voltage zero-crossing testing circuit, relate in particular to a kind of alternating voltage zero-crossing testing circuit that is used for part chopper-type power factor correction control circuit.
Technical background
In recent years, along with development of electronic technology, various electronic equipments, issuable current harmonics of household electrical appliance and reactive power also more and more cause people's attention to the pollution of electrical network, the existence of harmonic wave, not only greatly reduce the power factor of input circuit, and can pollute the detonator circuit fault the public power system.At present, in order effectively to improve power factor, reduction is to the requirement of components and parts and the loss of the components and parts that take effect, can adopt the chopping way of part copped wave in each voltage cycle to control, be directed to this part chopper-type power factor correction control circuit, must guarantee that input current and input voltage keep same-phase, therefore be necessary to work out a kind of input voltage zero cross detection circuit that is used for part chopper-type power factor correction control circuit and keep same-phase to guarantee input current and input voltage.
Summary of the invention
The object of the present invention is to provide a kind of alternating voltage zero-crossing testing circuit that is used for part chopper-type power factor correction control circuit, it has advantage of simple structure, and the zero passage that can detect input ac voltage is constantly to guarantee input current and input voltage same-phase.
The technical scheme that realizes above-mentioned purpose is: a kind of alternating voltage zero-crossing testing circuit that is used for power factor correction control circuit, described power factor correction control circuit includes a central processing unit, wherein, it comprises transformer, the bridge rectifier circuit that links to each other with the output terminal of transformer, be parallel to first resistance R 1 that is connected in series and second resistance R 2 of the output terminal of bridge rectifier circuit, be parallel to first capacitor C 1 at described second resistance R 2 two ends, an and electrochemical capacitor C3, the positive pole of this electrochemical capacitor C3 links to each other with an output terminal of described bridge rectifier circuit by a diode D1, negative pole links to each other with the other end of bridge rectifier circuit, the intermediate node of described first resistance R 1 and second resistance R 2 links to each other with the base stage of a triode T1, the emitter of this triode T1 links to each other with the negative pole of described electrochemical capacitor C3, be connected with the 4th resistance R 4 with the 3rd resistance R 3 respectively on the collector of triode T1, the 3rd resistance R 3 links to each other with the voltage of+5V, the 4th resistance R 4 links to each other with the input end of described central processing unit, also is in series with second capacitor C 2 between an end that links to each other with central processing unit of the 4th resistance R 4 and the emitter of triode T1.
The above-mentioned alternating voltage zero-crossing testing circuit that is used for power factor correction control circuit, wherein, described bridge rectifier circuit is connected and composed by four diode bridge.
The invention has the beneficial effects as follows: by the present invention, can make that the phase place of input AC electric current and input ac voltage can be synchronous fully, it can detect the zero passage moment of input ac voltage, and this circuit has simple in structure, practical advantage.
Description of drawings
Fig. 1 is the circuit diagram of alternating voltage zero-crossing testing circuit of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
See also Fig. 1, there is shown a kind of alternating voltage zero-crossing testing circuit that is used for power factor correction control circuit of the present invention, power factor correction control circuit includes a central processing unit 3, the present invention includes transformer 1, the bridge rectifier circuit 2 that links to each other with the output terminal of transformer 1, be parallel to first resistance R 1 that is connected in series and second resistance R 2 of the output terminal of bridge rectifier circuit 2, be parallel to first capacitor C 1 at second resistance R, 2 two ends, an and electrochemical capacitor C3, the positive pole of this electrochemical capacitor C3 links to each other with an output terminal of bridge rectifier circuit 2 by a diode D1, negative pole links to each other with the other end of bridge rectifier circuit 2, the intermediate node of first resistance R 1 and second resistance R 2 links to each other with the base stage of a triode T1, the emitter of this triode T1 links to each other with the negative pole of electrochemical capacitor C3, be connected with the 4th resistance R 4 with the 3rd resistance R 3 respectively on the collector of triode T1, the 3rd resistance R 3 links to each other with the voltage of+5V, the 4th resistance R 4 links to each other with the input end of central processing unit 3, also be in series with second capacitor C 2 between an end that links to each other with central processing unit 3 of the 4th resistance R 4 and the emitter of triode T1, among the present invention, bridge rectifier circuit 2 is connected and composed by four diode bridge.
When concrete the connection, the output signal of this alternating voltage zero-crossing testing circuit is connect the interruption input port of central processing unit 3, when the input voltage instantaneous value departs from zero crossing, triode T1 conducting, fractures were clamped at zero level during central processing unit 3 was corresponding; When input voltage during near zero crossing, triode T1 turn-offs, and fractures received a high level signal during central processing unit 3 was corresponding, and this high-low level transitional information is handled the synchronizing signal that just can obtain the AC-input voltage zero passage accordingly.
Need to prove: above only unrestricted technical scheme of the present invention in order to explanation, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. alternating voltage zero-crossing testing circuit that is used for power factor correction control circuit, described power factor correction control circuit includes a central processing unit, it is characterized in that, it comprises transformer, the bridge rectifier circuit that links to each other with the output terminal of transformer, be parallel to first resistance R 1 that is connected in series and second resistance R 2 of the output terminal of bridge rectifier circuit, be parallel to first capacitor C 1 at described second resistance R 2 two ends, an and electrochemical capacitor C3, the positive pole of this electrochemical capacitor C3 links to each other with an output terminal of described bridge rectifier circuit by a diode D1, negative pole links to each other with the other end of bridge rectifier circuit, the intermediate node of described first resistance R 1 and second resistance R 2 links to each other with the base stage of a triode T1, the emitter of this triode T1 links to each other with the negative pole of described electrochemical capacitor C3, be connected with the 4th resistance R 4 with the 3rd resistance R 3 respectively on the collector of triode T1, the 3rd resistance R 3 links to each other with the voltage of+5V, the 4th resistance R 4 links to each other with the input end of described central processing unit, also is in series with second capacitor C 2 between an end that links to each other with central processing unit of the 4th resistance R 4 and the emitter of triode T1.
2. the alternating voltage zero-crossing testing circuit that is used for power factor correction control circuit according to claim 1 is characterized in that described bridge rectifier circuit is connected and composed by four diode bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810203187A CN101738535A (en) | 2008-11-21 | 2008-11-21 | Alternating voltage zero-crossing detection circuit for power factor correction control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810203187A CN101738535A (en) | 2008-11-21 | 2008-11-21 | Alternating voltage zero-crossing detection circuit for power factor correction control circuit |
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| Publication Number | Publication Date |
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| CN101738535A true CN101738535A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810203187A Pending CN101738535A (en) | 2008-11-21 | 2008-11-21 | Alternating voltage zero-crossing detection circuit for power factor correction control circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033156A (en) * | 2010-11-11 | 2011-04-27 | 苏州合欣美电子科技有限公司 | Zero-crossing detection circuit of ecological house |
| CN102901861A (en) * | 2011-07-28 | 2013-01-30 | 兄弟工业株式会社 | Zero-crossing detector circuit and image forming apparatus having the same |
| WO2013044602A1 (en) * | 2011-09-30 | 2013-04-04 | 海信科龙电器股份有限公司 | Zero-crossing signal detection circuit |
| CN103207302A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Detecting circuit of discharge current of inductor and power factor correction circuit |
| CN103784099A (en) * | 2012-10-26 | 2014-05-14 | 美的集团股份有限公司 | Zero cross detection circuit and dish-washing machine |
| CN104216305A (en) * | 2013-05-31 | 2014-12-17 | 青岛海尔空调电子有限公司 | Method for improving reliability of cache data of household appliances |
| CN104833847A (en) * | 2015-04-28 | 2015-08-12 | 广东美的制冷设备有限公司 | Detection method of frequency and zero crossing point of input alternating current of air conditioning system and device |
| CN110708092A (en) * | 2019-08-28 | 2020-01-17 | 绍兴凯晟照明电器有限公司 | Method for realizing power line communication through chopping |
-
2008
- 2008-11-21 CN CN200810203187A patent/CN101738535A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033156A (en) * | 2010-11-11 | 2011-04-27 | 苏州合欣美电子科技有限公司 | Zero-crossing detection circuit of ecological house |
| CN102901861A (en) * | 2011-07-28 | 2013-01-30 | 兄弟工业株式会社 | Zero-crossing detector circuit and image forming apparatus having the same |
| US8912468B2 (en) | 2011-07-28 | 2014-12-16 | Brother Kogyo Kabushiki Kaisha | Zero-crossing detector circuit and image forming apparatus having the same |
| CN102901861B (en) * | 2011-07-28 | 2015-12-02 | 兄弟工业株式会社 | Zero-crossing detector circuit and the image forming apparatus with zero-crossing detector circuit |
| WO2013044602A1 (en) * | 2011-09-30 | 2013-04-04 | 海信科龙电器股份有限公司 | Zero-crossing signal detection circuit |
| CN103207302A (en) * | 2012-01-17 | 2013-07-17 | 珠海格力电器股份有限公司 | Detecting circuit of discharge current of inductor and power factor correction circuit |
| CN103784099A (en) * | 2012-10-26 | 2014-05-14 | 美的集团股份有限公司 | Zero cross detection circuit and dish-washing machine |
| CN104216305A (en) * | 2013-05-31 | 2014-12-17 | 青岛海尔空调电子有限公司 | Method for improving reliability of cache data of household appliances |
| CN104833847A (en) * | 2015-04-28 | 2015-08-12 | 广东美的制冷设备有限公司 | Detection method of frequency and zero crossing point of input alternating current of air conditioning system and device |
| CN104833847B (en) * | 2015-04-28 | 2017-08-25 | 广东美的制冷设备有限公司 | The frequency and detection method, the device of zero crossing of the input AC electricity of air-conditioning system |
| CN110708092A (en) * | 2019-08-28 | 2020-01-17 | 绍兴凯晟照明电器有限公司 | Method for realizing power line communication through chopping |
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Open date: 20100616 |