CN203377778U - Active control valley-fill circuit - Google Patents
Active control valley-fill circuit Download PDFInfo
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- CN203377778U CN203377778U CN201320394798.3U CN201320394798U CN203377778U CN 203377778 U CN203377778 U CN 203377778U CN 201320394798 U CN201320394798 U CN 201320394798U CN 203377778 U CN203377778 U CN 203377778U
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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
Abstract
The utility model discloses an active control valley-fill circuit mainly applied to pre-stage power factor correction and energy storage of switch power source. The circuit includes an AC power source, a rectifier and a load. The AC power source is connected with an input terminal of the rectifier. An output terminal of the rectifier is connected with the load. The circuit also includes an energy-storing capacitor, a switch circuit and a control circuit. The switch circuit includes two power terminals and a control terminal of a power channel. The energy-storing capacitor is connected to the output terminal of the rectifier in parallel after being connected with the two power terminals of the switch circuit in series. The control terminal of the switch circuit is connected with the control circuit. The active control valley-fill circuit provided by the utility model has positive effects that the circuit is simple in structure; power factors are improved; and output voltage is not higher than AC ceiling voltage and the minimum value of the output voltage can be set.
Description
Technical field
The utility model relates to the power supply circuits field, and what be specifically related to a kind of active control fills out the paddy circuit, is mainly used in prime power factor correction and the energy storage of Switching Power Supply.
Technical background
At present, Switching Power Supply is with its high efficiency, and the advantage of small size has entered into industry, civilian every field widely.Switching power circuit comprises prime circuit of power factor correction and rear class switching power circuit, and the effect of prime circuit of power factor correction is the power factor that improves power consumption equipment, reduces reactive current, reduces the pollution of reactive current to electrical network.Current common circuit of power factor correction mainly contains two kinds, respectively as depicted in figs. 1 and 2.
Fig. 1 is current a kind of APFC, is widely used in the pre-voltage stabilizing of prime and the power factor correction aspect of various Switching Power Supplies, wherein.Inductance 103, field effect transistor 106 and diode 104 form the boost switching circuit and open up benefit, electric capacity 105 is for output voltage filtering and energy storage, resistance 108 and 109 is for generation of the alternating current phases voltage signal, resistance 111 and 112 is for detection of output voltage signal, the two feed-in PFC control circuit, produce a signal with output voltage and ac power waveform envelope correlation, the electric current of resistance 110 is flow through in control, further, make to flow through field effect transistor 106, the current waveform of inductance 103 is relevant to alternating current phases voltage, amplitude is relevant to output voltage, reach the purpose of power factor correction.This scheme can reach the High Power Factor performance close to 1, shortcoming is that circuit is complicated and cost is high, in addition, output voltage must be higher than the peak value of input ac voltage, need the semiconductor switch device of rear class Switching Power Supply to bear higher voltage stress, and this need higher semiconductor device cost.
Fig. 2 is the current passive paddy circuit of filling out as power factor correction and energy storage, be characterized in diode 205,206 and 207 and storage capacitor 203 and 204 formed the circuit form that storage capacitor 203 and 204 whens charging are connected in series, are connected in parallel while discharging, mode of operation is as follows:
When alternating current 201 phase voltages are greater than storage capacitor 203 and 204 both voltage sums, diode 206 and 207 cut-offs, diode 205 and rectifier bridge 202 conductings, alternating current is given storage capacitor 204 and 205 power supplies by rectifier bridge 202 and diode 205, while is powering load also, in the meantime, storage capacitor 204 and 205 is charged to respectively a half voltage of alternating current 201 peak values; Be less than its crest voltage one half at alternating current 201 phase voltages, storage capacitor 203 is by diode 206, storage capacitor 204 by 207 pairs of load discharges of diode, and now rectifier bridge 202 and diode 205 all oppositely end; During a half voltage at the phase voltage of alternating current 201 at its peak value and peak value, alternating current 201 directly powers to the load by rectifier bridge 202, and diode 205,206 and 207 is oppositely cut-off all, and storage capacitor voltage remains unchanged.The power factor of this scheme is lower than the APFC shown in Fig. 1, but circuit is fairly simple, and cost is also lower, is widely used in electricity-saving lamp, LED illumination constant power less, in the product of cost sensitivity.This passive output voltage minimum of filling out the paddy circuit is below half of alternating current peak value, this requires the rear class Switching Power Supply must adapt to wider input voltage range, thereby the performance index that caused the rear class Switching Power Supply reduce and cost increases, the application that has also caused this to fill out the paddy circuit is limited.
Thereby, still needing a kind of circuit of power factor correction, output voltage raises and the little circuit of power factor correction of output voltage fluctuation range without additional.
The utility model content
The defect existed for above-mentioned prior art, the technical problems to be solved in the utility model is: provide that a kind of power factor is high and circuit cost is low, circuit is simple, and output voltage is not filled out the paddy circuit higher than alternating current peak value and the little active control of output voltage fluctuation range.
The utility model is that the technical scheme that solves the problems of the technologies described above employing is: a kind of active control fill out the paddy circuit, comprise an AC power, a rectifier and a load, AC power is connected with the input of rectifier, the output of rectifier is connected with load, it is characterized in that: also comprise a storage capacitor, a switching circuit, a control circuit; Two power ends and a control end that described switching circuit comprises power channels, storage capacitor and the output that is connected in parallel on rectifier after two power ends of switching circuit are connected, the control end of switching circuit is connected with control circuit.
As preferred version, described switching circuit comprises a charge switch and a discharge switch, the power channels of charge switch formation in parallel with two power ends of discharge switch switching circuit; During described charge switch conducting, alternating current charges to storage capacitor, and during described discharge switch conducting, storage capacitor is to load discharge.
Preferably, described discharge switch is field effect transistor, triode, controllable silicon or equivalent electrons switching device.
Preferably, described charge switch is diode or equivalent electrons switching device.
As preferred version, control circuit is an error amplifying circuit, and the output of described error amplifying circuit is connected with the switching circuit control end, and the reference ground of described error amplifying circuit is connected with switching circuit one power end.
As preferred version, described control circuit comprises two resistance, is connected in parallel on two power ends of switching circuit after described two resistance series connection, and the series connection joint of described two resistance is connected with the control end of discharge switch.
As preferred version, described rectifier comprises a full bridge rectifier and a diode, and described diode is connected on the output loop of rectifier bridge.
As preferred version, the input of described control circuit detects the signal relevant to alternating current phases, when alternating current phases voltage when setting thresholding, the output controlled discharge switch conduction of control circuit, when alternating current phases voltage, when setting thresholding, the output controlled discharge switch of control circuit turn-offs.
As preferred version, the input of described control circuit detects two signals that the power terminal voltage is relevant to switching circuit, and when the voltage of two power ends reaches the setting thresholding, the control circuit output is controlled described discharge switch conducting.
As preferred version, after described discharge switch conducting, be locked in conducting state, until the voltage reversal at discharge switch two ends.
The good effect of the utility model circuit is: improved power factor, circuit cost is low, and circuit structure is simple, is conducive to promote the use of on a large scale.Improved power factor, output voltage is not higher than the alternating current crest voltage, and the output voltage minimum value can be set.
The accompanying drawing explanation
Fig. 1 is the simple and easy schematic diagram of APFC in prior art.
Fig. 2 is the passive paddy circuit of filling out of power factor correcting and energy storage in prior art.
Fig. 3 is that paddy circuit basic principle figure is filled out in active control of the present utility model.
Fig. 4 fills out a kind of preferred embodiment schematic diagram of paddy circuit according to active control of the present utility model.
Fig. 5 is the another kind of preferred embodiment schematic diagram that the paddy circuit is filled out in active control of the present utility model.
Fig. 6 is another preferred embodiment schematic diagram that the paddy circuit is filled out in active control of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Fig. 3 is that paddy circuit basic principle figure is filled out in active control of the present utility model, comprises AC power 301, rectifier 302, storage capacitor 303, switching circuit 304 and control circuit 305 and load.Wherein,
Switching circuit comprises charge switch 306 and discharge switch 307, charge switch 306 in parallel with two power ends discharge switch 307, and the controlled circuit 305 of the control end of discharge switch 307 is controlled.
According to the difference of discharge switch 307 cut-off conditions, two kinds of mode of operations are arranged, the first is:
When the phase voltage of alternating current 301 is greater than storage capacitor 303 both end voltage, charge switch 306 conductings, alternating current 301 gives storage capacitor 303 chargings by rectifier 302 and charge switch 306, charge path is alternating current 301---rectifier 302---storage capacitor 303---charge switch 306---rectifier 302---alternating current 301, meanwhile, alternating current 301 is also by rectifier 302 powering loads; When alternating current 301 phase voltages drop to lower than storage capacitor 303 both end voltage but higher than the first setting threshold voltage, charge switch 306 and discharge switch 307 all end, storage capacitor 303 does not have energy exchange with load and alternating current 301, and alternating current 301 directly powers to the load by rectifier 302; After alternating current 301 phase voltages drop to lower than the first setting threshold voltage and before rising to higher than the second setting threshold voltage, discharge switch 307 conductings, rectifier 302 and charge switch 306 oppositely end, and storage capacitor 303 powers to the load; When alternating current 301 phase voltages rise to higher than the second setting threshold voltage but lower than storage capacitor 303 both end voltage, charge switch 306 and discharge switch 307 all end, storage capacitor 303 does not have energy exchange with load and alternating current 301, and alternating current 301 directly powers to the load by rectifier 302.
The second is:
When the phase voltage of alternating current 301 is greater than storage capacitor 303 both end voltage, charge switch 306 conductings, alternating current 301 gives storage capacitor 303 chargings by rectifier 302 and charge switch 306, charge path is alternating current 301---rectifier 302---storage capacitor 303---charge switch 306---rectifier 302---alternating current 301, meanwhile, alternating current 301 is also by rectifier 302 powering loads; At alternating current 301 phase voltages, drop to lower than storage capacitor 303 both end voltage but when setting threshold voltage, charge switch 306 and discharge switch 307 all end, storage capacitor 303 does not have energy exchange with load and alternating current 301, and alternating current 301 directly powers to the load by rectifier 302;
At alternating current 301 phase voltages, drop to lower than after setting threshold voltage and before rising to higher than storage capacitor 303 both end voltage, discharge switch 307 conductings, rectifier 302 and charge switch 306 oppositely end, storage capacitor 303 powers to the load, until alternating current 301 phase voltages rise to higher than storage capacitor 303 both end voltage.
Fill out paddy circuit basic principle for better explanation active control of the present utility model, below in conjunction with preferred embodiment of the present utility model, the utility model is done to finer explanation.
Fig. 4 is a kind of preferred embodiment schematic diagram that the paddy circuit is filled out in active control of the present utility model, comprises AC power 401, rectifier 402, storage capacitor 403, switching circuit 404, control circuit 405 and load.Wherein,
Switching circuit comprises diode 406 and field effect transistor 407, two power ends of diode 406 and field effect transistor 407 compose in parallel charge and discharge switch, two power ends that two power ends of this charge and discharge switch are switching circuit, the gate pole of field effect transistor 407 is connected with the output of control circuit 405;
When the phase voltage of alternating current 401 is greater than storage capacitor 403 both end voltage, diode 410 and 406 conductings, alternating current 401 gives storage capacitor 403 chargings by rectifier 402 and diode 406, charge path is alternating current 401---full bridge rectifier 411---diode 410---storage capacitor 403---diode 406---full bridge rectifier 411---alternating current 401, meanwhile, alternating current 401 is also by full bridge rectifier 411 and diode 410 powering loads; At alternating current 401 phase voltages lower than storage capacitor 403 both end voltage but when setting threshold voltage, diode 406 and discharge switch 407 all end, storage capacitor 403 does not have energy exchange with load and alternating current 401, and alternating current 401 directly powers to the load by rectifier 402; When alternating current 401 phase voltages drop to lower than the setting threshold voltage, field effect transistor 407 conductings, rectifier 402 and diode 406 oppositely end, and storage capacitor 403 powers to the load via field effect transistor 407.
Fig. 5 is another preferred embodiment of the utility model, comprises AC power 501, rectifier 502, storage capacitor 503, switching circuit 504, control circuit 505 and load.Wherein,
Switching circuit comprises diode 506 and field effect transistor 507, two power ends of diode 506 formation in parallel with two power ends of field effect transistor 507 switching circuit, and the gate pole of field effect transistor 507 is connected with the output of control circuit 505;
The reference ground of control circuit 505 is connected with the source electrode of field effect transistor 507, comprise comparator 508, voltage source 509, field effect transistor 511 and resistance 510,512 and 513, wherein, resistance 512 1 ends are connected to the drain electrode of field effect transistor 507, the other end is via resistance 513 ground connection, and resistance 512 and 513 joint are connected to the input in the same way of comparator 508; One end ground connection of power supply 509, the other end is connected to the inverting input of comparator 508 via resistance 510; The gate pole of field effect transistor 511 is connected with the output of comparator 508, source ground, and drain electrode is connected to the inverting input of comparator 508; The drain electrode of the power supply end field effect transistor 507 of comparator 508 is connected.
The operation principle of this circuit is:
When the phase voltage of alternating current 501 is greater than storage capacitor 503 both end voltage, diode 506 conductings, the feeder ear dead electricity of the comparator 508 in control circuit 505, field effect transistor 507 is turn-offed, alternating current 501 gives storage capacitor 503 chargings by rectifier 502, diode 506, charge path is alternating current 501---rectifier 502---and storage capacitor 503---diode 506---rectifier 502---alternating current 501, meanwhile, alternating current 501 is also by rectifier 502 powering loads;
At alternating current 501 phase voltages during lower than storage capacitor 503 both end voltage, diode 506 cut-offs, field effect transistor 507 drain voltages are higher than source voltage, the feeder ear of the comparator 508 in control circuit 505 obtains electric, being on the scene effect pipe 507 drain-source voltages are during lower than the threshold voltage set by comparator 508, power supply 509 and resistance 512,513, comparator 508 is output as low level, field effect transistor 507 cut-offs, storage capacitor 503 does not have energy exchange with alternating current 501 and load, and alternating current 501 is by rectifier 502 powering loads; Being on the scene effect pipe 507 drain-source voltages are during higher than the threshold voltage set by comparator 508, power supply 509 and resistance 512,513, the output of comparator 508 is locked as high level, field effect transistor 507 is locked in conducting state, until the phase voltage of alternating current 501 is while being greater than storage capacitor 503 both end voltage, diode 506 conductings, the feeder ear dead electricity of the comparator 508 in control circuit 505, field effect transistor 507 is turn-offed.
The specific embodiment that has that Fig. 6 is the utility model circuit, comprise AC power 601, rectifier 602, storage capacitor 603, switching circuit 604, control circuit 605 and load.Wherein,
Alternating current 601 is connected with the input of rectifier 602, the output of rectifier 602 is connected with load, the power end of switching circuit 604 and the output two ends that are connected in parallel on rectifier 602 after storage capacitor 603 is connected, control end is connected with the output of control circuit 605, and 604 liang of power ends of the input of control circuit 605 and switching circuit are connected;
Switching circuit comprises diode 606 and controllable silicon 607, two power ends of diode 606 formation in parallel with two power ends of controllable silicon 607 switching circuit, and the gate pole of controllable silicon 607 is connected with the output of control circuit 605.
Control circuit 605 comprises resistance 608 and 609, and wherein an end of resistance 608 is connected to the silicon controlled negative electrode, and the other end is connected to the gate pole of controllable silicon 607, and an end of resistance 609 is connected to the gate pole of controllable silicon 607, and the other end is connected to the anode of controllable silicon 607.
The operation principle of this circuit is:
When the phase voltage of alternating current 601 is greater than storage capacitor 603 both end voltage, diode 606 conductings, alternating current 601 gives storage capacitor 603 chargings by rectifier 602, diode 606, charge path is alternating current 601---rectifier 602---storage capacitor 603---diode 606---rectifier 602---alternating current 601, meanwhile, alternating current 601 is also by rectifier 602 powering loads;
At alternating current 601 phase voltages during lower than storage capacitor 603 both end voltage, diode 606 cut-offs, controllable silicon 607 anode voltages are higher than cathode voltage, resistance 608 in control circuit 605, 609 potential-divider networks that form form the voltage of forward between silicon controlled gate pole and negative electrode, when the anode of controllable silicon 607 and cathode voltage when low, voltage between gate pole and negative electrode is also lower, controllable silicon 607 cut-offs, anode and cathode voltage rising when controllable silicon 607, voltage between gate pole and negative electrode also raises, when the gate pole door capable of being opened that reaches controllable silicon 607 is prescribed a time limit, controllable silicon 607 conducting that is triggered, until the phase voltage of alternating current 601 is while being greater than storage capacitor 603 both end voltage, diode 606 conductings, the cathode voltage of controllable silicon 607 is higher than anode voltage, controllable silicon 607 cut-offs.
Above specific embodiment has only been described principal character and the innovative point of this programme.Those skilled in the art should understand, and this programme is not restricted to the described embodiments.Under the prerequisite that does not break away from the innovation point and protection range, this programme also has various variations, and these changes and improvements all will fall in the claimed scope of this programme.The claimed scope of this programme is limited by appending claims and equivalent thereof.
It should be noted that above-described embodiment is in order to illustrate rather than limit the utility model, those skilled in the art can design many optional embodiment under the condition of the scope that does not deviate from claims.Word " comprises " and does not get rid of those elements different from the element of listing in claim or step or the existence of step.The existence that word " " before element or " one " do not get rid of a plurality of this elements, in enumerating several circuit claims, several can the performance by one in these devices, hardware branch is also same, only, because some method is to describe, do not illustrate that the combination of these methods can not be used for making a profit in different dependent claims.
It should be noted that, in this article, such as the relational terms of the first and second grades, only be used for an entity or operation and another entity or operating space are separated, and not necessarily require or imply these entities or the operation between exist any this reality relation or the order, and, term " comprises ", " comprise " or any other variant is intended to contain comprising of nonexcludability, thereby make the process that comprises a series of key elements, method, article or equipment not only comprise those key elements, but also comprise other key elements that those are clearly listed, or also be included as this process, method, the key element that article or equipment are intrinsic, term " is connected ", " connection ", " be connected to " or other variants, not only comprise two entities directly are connected, also comprise by thering are useful other entities that improve effect and indirectly being connected.
Claims (10)
1. an active control fills out the paddy circuit, comprise an AC power, a rectifier and a load, AC power is connected with the input of rectifier, and the output of rectifier is connected with load, it is characterized in that: also comprise a storage capacitor, a switching circuit, a control circuit; Two power ends and a control end that described switching circuit comprises power channels, storage capacitor and the output that is connected in parallel on rectifier after two power ends of switching circuit are connected, the control end of switching circuit is connected with control circuit.
2. the paddy circuit of filling out according to claim 1, it is characterized in that: described switching circuit comprises a charge switch and a discharge switch, the power channels of charge switch formation in parallel with two power ends of discharge switch switching circuit; During described charge switch conducting, alternating current charges to storage capacitor, and during described discharge switch conducting, storage capacitor is to load discharge.
3. the paddy circuit of filling out according to claim 2, it is characterized in that: described discharge switch is field effect transistor, triode, controllable silicon or equivalent electrons switching device.
4. the paddy circuit of filling out according to claim 2, it is characterized in that: described charge switch is diode or equivalent electrons switching device.
5. the paddy circuit of filling out according to claim 1, it is characterized in that: control circuit is an error amplifying circuit, the output of described error amplifying circuit is connected with the switching circuit control end, and the reference ground of described error amplifying circuit is connected with switching circuit one power end.
6. the paddy circuit of filling out according to claim 1 and 2, it is characterized in that: control circuit comprises two resistance, be connected in parallel on two power ends of switching circuit after described two resistance series connection, the series connection joint of described two resistance is connected with the control end of discharge switch.
7. the paddy circuit of filling out according to claim 1, it is characterized in that: described rectifier comprises a full bridge rectifier and a diode, and described diode is connected on the output loop of rectifier bridge.
8. the paddy circuit of filling out according to claim 1 and 2, it is characterized in that: the input of described control circuit detects the signal relevant to alternating current phases, when alternating current phases voltage when setting thresholding, the output controlled discharge switch conduction of control circuit, when alternating current phases voltage, when setting thresholding, the output controlled discharge switch of control circuit turn-offs.
9. the paddy circuit of filling out according to claim 2, it is characterized in that: the input of described control circuit detects two signals that the power terminal voltage is relevant to switching circuit, when the voltage of two power ends reaches the setting thresholding, the control circuit output is controlled described discharge switch conducting.
10. the paddy circuit of filling out according to claim 9, is characterized in that: after described discharge switch conducting, be locked in conducting state, until the voltage reversal at discharge switch two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394798.3U CN203377778U (en) | 2013-07-03 | 2013-07-03 | Active control valley-fill circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394798.3U CN203377778U (en) | 2013-07-03 | 2013-07-03 | Active control valley-fill circuit |
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| CN203377778U true CN203377778U (en) | 2014-01-01 |
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| CN201320394798.3U Expired - Fee Related CN203377778U (en) | 2013-07-03 | 2013-07-03 | Active control valley-fill circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312144A (en) * | 2013-07-03 | 2013-09-18 | 上海路千电子科技有限公司 | Active-control valley fill circuit and control method thereof |
| CN105592598A (en) * | 2016-03-21 | 2016-05-18 | 上海路傲电子科技有限公司 | LED drive circuit having high power factor and no flash |
| CN107995736A (en) * | 2017-12-15 | 2018-05-04 | 矽力杰半导体技术(杭州)有限公司 | LED drive circuit, power inverter and control method |
| CN109525160A (en) * | 2017-09-20 | 2019-03-26 | 株式会社东芝 | Motor control assembly and air conditioner |
-
2013
- 2013-07-03 CN CN201320394798.3U patent/CN203377778U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312144A (en) * | 2013-07-03 | 2013-09-18 | 上海路千电子科技有限公司 | Active-control valley fill circuit and control method thereof |
| CN105592598A (en) * | 2016-03-21 | 2016-05-18 | 上海路傲电子科技有限公司 | LED drive circuit having high power factor and no flash |
| CN105592598B (en) * | 2016-03-21 | 2018-02-13 | 上海路傲电子科技有限公司 | High Power Factor, the LED drive circuit without stroboscopic |
| CN109525160A (en) * | 2017-09-20 | 2019-03-26 | 株式会社东芝 | Motor control assembly and air conditioner |
| CN107995736A (en) * | 2017-12-15 | 2018-05-04 | 矽力杰半导体技术(杭州)有限公司 | LED drive circuit, power inverter and control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20160703 |
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| CF01 | Termination of patent right due to non-payment of annual fee |