CN103312144A - Active-control valley fill circuit and control method thereof - Google Patents
Active-control valley fill circuit and control method thereof Download PDFInfo
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Abstract
The invention discloses an active-control valley fill circuit and a control method thereof which are mainly applied to pre-stage power factor correction and energy accumulation of a switching power supply. The active-control valley fill circuit comprises an alternating-current power supply, a current rectifier, a load, an energy storing capacitor, a switch circuit and control circuit, the alternating-current power supply is connected with an input end of the current rectifier, an output end of the current rectifier is connected with the load, the switch circuit comprises two power ends and a control end of a power channel, the energy storing capacitor is serially connected with the two power ends of the switch circuit and is then parallelly connected with an output end of the current rectifier, and the control end of the switch circuit is connected with the control circuit. According to the control method, by means of presetting threshold voltage, switching between power supplying of the load and energy storing of the energy storing capacitor is realized according to changes of relationships among alternating-current phase position voltage, voltage at two ends of the energy storing capacitor and the threshold voltage. The active-control valley fill circuit has the advantages that a circuit structure is simple, a power factor is improved, output voltage is not higher than alternating-current crest voltage, and the minimum value of the output voltage can be set.
Description
Technical field
The present invention relates to the power supply circuits field, what be specifically related to a kind of active control fills out paddy circuit and control method thereof, 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 reactive current to the pollution of 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 used 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 and flow through field effect transistor 106, the current waveform of inductance 103 is relevant with alternating current phases voltage, amplitude is relevant with output voltage, reaches 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 consisted of the circuit form that storage capacitor 203 and 204 whens charging are connected in series, are connected in parallel when discharging, mode of operation is as follows:
At alternating current 201 phase voltages during 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; Less than its crest voltage one half, by 207 pairs of load discharges of diode, this moment, rectifier bridge 202 and diode 205 all oppositely ended storage capacitor 203 by diode 206, storage capacitor 204 at alternating current 201 phase voltages; When a half voltage at its peak value and peak value of the phase voltage of alternating current 201, 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 APFC shown in Figure 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, and 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.
Summary of the invention
For the defective that above-mentioned prior art exists, the technical problem to be solved in the present invention is: provide that a kind of power factor is high and circuit cost is low, circuit is simple, and what output voltage was not higher than the little active control of alternating current peak value and output voltage fluctuation range fills out the paddy circuit.
The present invention 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; Described switching circuit comprises two power ends and control end of power channels, storage capacitor and the output that is connected in parallel on rectifier after two power ends of switching circuit are connected, and 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 with alternating current phases, when alternating current phases voltage is lower than the setting thresholding, the output controlled discharge switch conduction of control circuit, when alternating current phases voltage was higher than the setting thresholding, the output controlled discharge switch of control circuit turn-offed.
As preferred version, the input of described control circuit detects two signals that the power terminal voltage is relevant with switching circuit, and when the voltage of two power ends reached the setting thresholding, the control circuit output was controlled described discharge switch conducting.
As preferred version, after the described discharge switch conducting, be locked in conducting state, until the voltage reversal at discharge switch two ends.
The good effect of circuit of the present invention is: improved power factor, circuit cost is low, and circuit structure is simple, is conducive to promote the use of on a large scale.
The present invention also provides a kind of control method of filling out the paddy circuit based on this active control, comprising: preset the first threshold voltage and the second threshold voltage;
When alternating current phases voltage is higher than the storage capacitor both end voltage, the equal conducting of rectifier and switching circuit, alternating current charges to storage capacitor, gives simultaneously the Switching Power Supply load supplying;
At the alternating current phases voltage drop to being lower than the storage capacitor both end voltage but when being higher than the first threshold voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, and alternating current directly powers to the load by rectifier;
The alternating current phases voltage drop after be lower than the first threshold voltage and rise to be higher than the second threshold voltage before, the switching circuit conducting, rectifier oppositely ends, storage capacitor is to the Switching Power Supply load supplying;
Rise at alternating current phases voltage and to be higher than the second threshold voltage but when being lower than the storage capacitor both end voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, and alternating current directly powers to the load by rectifier.
As preferred version, described the first threshold voltage and the second threshold voltage are same threshold voltage.
Circuit of the present invention also provides another control method, comprising: set a threshold voltage, described threshold voltage is lower than the voltage at storage capacitor two ends,
When alternating current phases voltage is higher than the storage capacitor both end voltage, the equal conducting of rectifier and switching circuit, alternating current charges to storage capacitor, gives simultaneously the Switching Power Supply load supplying;
The alternating current phases voltage drop to being lower than the storage capacitor both end voltage but the switching circuit both end voltage when setting threshold voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, alternating current directly powers to the load by rectifier;
Further descend at alternating current phases voltage, the switching circuit both end voltage reaches when setting threshold voltage, switching circuit conducting, rectifier cut-off, storage capacitor to load discharge, is higher than storage capacitor both end voltage until alternating current rises to again by switching circuit.
The good effect that the control method of filling out the paddy circuit of active control provided by the invention can reach is: improved power factor, output voltage is not higher than the alternating current crest voltage, and the output voltage minimum value can be set.
Description of drawings
Fig. 1 is the simple and easy schematic diagram of APFC in the prior art.
Fig. 2 is the passive paddy circuit of filling out of power factor correcting and energy storage in the prior art.
Fig. 3 is that paddy circuit basic principle figure is filled out in active control of the present invention.
Fig. 4 is a kind of preferred embodiment schematic diagram that the paddy circuit is filled out in active control according to the present invention.
Fig. 5 is the another kind of preferred embodiment schematic diagram that the paddy circuit is filled out in active control of the present invention.
Fig. 6 is another preferred embodiment schematic diagram that the paddy circuit is filled out in active control of the present invention.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 3 is that paddy circuit basic principle figure is filled out in active control of the present invention, comprises AC power 301, rectifier 302, storage capacitor 303, switching circuit 304 and control circuit 305 and load.Wherein,
Alternating current 301 links to each other with the input of rectifier 302, the output of rectifier 302 links to each other with load, the power end of switching circuit 304 and the output two ends that are connected in parallel on rectifier 302 after storage capacitor 303 is connected, switching circuit 304 control ends link to each other with control circuit 305, control circuit 305 links to each other with alternating current, for detection of the voltage phase signal of alternating current;
Switching circuit comprises charge switch 306 and discharge switch 307, and is charge switch 306 in parallel with two power ends discharge switch 307, controlled circuit 305 controls of the control end of discharge switch 307.
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 during 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; Drop at alternating current 301 phase voltages and to be lower than storage capacitor 303 both end voltage but to be higher than first 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; Alternating current 301 phase voltages drop to be lower than first set threshold voltage after and rise to be higher than second set threshold voltage before, discharge switch 307 conductings, rectifier 302 and charge switch 306 oppositely end, storage capacitor 303 powers to the load; Rise at alternating current 301 phase voltages and to be higher than second and to set threshold voltage but when being 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 during 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; Drop at alternating current 301 phase voltages and to be lower than storage capacitor 303 both end voltage but to be higher than 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;
Alternating current 301 phase voltages drop to be lower than set threshold voltage after and rise to be higher than storage capacitor 303 both end voltage before, discharge switch 307 conductings, rectifier 302 and charge switch 306 oppositely end, storage capacitor 303 powers to the load, and is higher than storage capacitor 303 both end voltage until alternating current 301 phase voltages rise to.
Fill out paddy circuit basic principle for better explanation active control of the present invention, below in conjunction with the preferred embodiments of the present invention the present invention is done 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 invention, comprises AC power 401, rectifier 402, storage capacitor 403, switching circuit 404, control circuit 405 and load.Wherein,
Alternating current 401 links to each other with the input of rectifier 402, and the output of rectifier 402 links to each other with load, the power end of switching circuit 404 and the output two ends that are connected in parallel on rectifier 402 after storage capacitor 403 is connected, and control end links to each other with the output of control circuit 405;
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 of this charge and discharge switch are two power ends of switching circuit, and the gate pole of field effect transistor 407 links to each other with the output of control circuit 405;
When the phase voltage of alternating current 401 during 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; When alternating current 401 phase voltages are lower than storage capacitor 403 both end voltage but are higher than the 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; Drop at alternating current 401 phase voltages and to be lower than when 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 present invention, comprises AC power 501, rectifier 502, storage capacitor 503, switching circuit 504, control circuit 505 and load.Wherein,
Alternating current 501 links to each other with the input of rectifier 502, the output of rectifier 502 links to each other with load, the power end of switching circuit 504 and the output two ends that are connected in parallel on rectifier 502 after storage capacitor 503 is connected, control end links to each other with the output of control circuit 505, and 504 liang of power ends of the input of control circuit 505 and switching circuit link to each other;
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 links to each other with the output of control circuit 505;
The reference ground of control circuit 505 links to each other 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 in the same way input 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 links to each other 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 links to each other.
The operation principle of this circuit is:
When the phase voltage of alternating current 501 during greater than storage capacitor 503 both end voltage, diode 506 conductings, the feeder ear dead electricity of the comparator 508 in the 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;
When alternating current 501 phase voltages are 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 the control circuit 505 gets electric, when being on the scene effect pipe 507 drain-source voltages are lower than the threshold voltage of being 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; When being on the scene effect pipe 507 drain-source voltages are higher than the threshold voltage of being 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 during greater than storage capacitor 503 both end voltage, diode 506 conductings, the feeder ear dead electricity of the comparator 508 in the control circuit 505, field effect transistor 507 is turn-offed.
Fig. 6 is the specific embodiment that has of circuit of the present invention, comprises AC power 601, rectifier 602, storage capacitor 603, switching circuit 604, control circuit 605 and load.Wherein,
Alternating current 601 links to each other with the input of rectifier 602, the output of rectifier 602 links to each other 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 links to each other with the output of control circuit 605, and 604 liang of power ends of the input of control circuit 605 and switching circuit link to each other;
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 links to each other with the output of control circuit 605
The operation principle of this circuit is:
When the phase voltage of alternating current 601 during 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;
When alternating current 601 phase voltages are 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 the 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 are low, voltage between gate pole and the negative electrode is also lower, controllable silicon 607 cut-offs, anode and cathode voltage rising when controllable silicon 607, voltage between gate pole and the 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 during 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.
Should be noted that above-described embodiment is in order to illustrate rather than limit the present invention, 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 listed or step in the claim or the existence of step.The existence that word " " before the 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 also is 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.
Need to prove, in this article, only be used for an entity or operation and another entity or operating space are separated such as the relational terms of the first and second grades, and not necessarily require or hint 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 so that comprise the process of 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 " links to each other ", " connection ", " be connected to " or other variants, not only comprise two entities directly are connected, also comprise by having useful other entities that improve effect indirectly being connected.
Claims (13)
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; Described switching circuit comprises two power ends and control end of power channels, storage capacitor and the output that is connected in parallel on rectifier after two power ends of switching circuit are connected, and 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 with alternating current phases, when alternating current phases voltage is lower than the setting thresholding, the output controlled discharge switch conduction of control circuit, when alternating current phases voltage was higher than the setting thresholding, the output controlled discharge switch of control circuit turn-offed.
9. the paddy circuit of filling out according to claim 1 and 2, it is characterized in that: the input of described control circuit detects two signals that the power terminal voltage is relevant with switching circuit, when the voltage of two power ends reached the setting thresholding, the control circuit output was controlled described discharge switch conducting.
10. the paddy circuit of filling out according to claim 9 is characterized in that: after the described discharge switch conducting, be locked in conducting state, until the voltage reversal at discharge switch two ends.
11. one kind is utilized the described control method of filling out the paddy circuit of claim 1, it is characterized in that: comprising: preset the first threshold voltage and the second threshold voltage;
When alternating current phases voltage is higher than the storage capacitor both end voltage, the equal conducting of rectifier and switching circuit, alternating current charges to storage capacitor, gives simultaneously the Switching Power Supply load supplying;
At the alternating current phases voltage drop to being lower than the storage capacitor both end voltage but when being higher than the first threshold voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, and alternating current directly powers to the load by rectifier;
The alternating current phases voltage drop after be lower than the first threshold voltage and rise to be higher than the second threshold voltage before, the switching circuit conducting, rectifier oppositely ends, storage capacitor is to the Switching Power Supply load supplying;
Rise at alternating current phases voltage and to be higher than the second threshold voltage but when being lower than the storage capacitor both end voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, and alternating current directly powers to the load by rectifier.
12. control method according to claim 11 is characterized in that: described the first threshold voltage and the second threshold voltage are same threshold voltage.
13. another kind utilizes the described control method of filling out the paddy circuit of claim 1, it is characterized in that: comprising: set a threshold voltage, described threshold voltage is lower than the voltage at storage capacitor two ends,
When alternating current phases voltage is higher than the storage capacitor both end voltage, the equal conducting of rectifier and switching circuit, alternating current charges to storage capacitor, gives simultaneously the Switching Power Supply load supplying;
The alternating current phases voltage drop to being lower than the storage capacitor both end voltage but the switching circuit both end voltage when setting threshold voltage, the switching circuit cut-off, storage capacitor and load and alternating current do not have energy exchange, alternating current directly powers to the load by rectifier;
Further descend at alternating current phases voltage, the switching circuit both end voltage reaches when setting threshold voltage, switching circuit conducting, rectifier cut-off, storage capacitor to load discharge, is higher than storage capacitor both end voltage until alternating current rises to again by switching circuit.
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| CN103762868A (en) * | 2014-02-12 | 2014-04-30 | 魏其萃 | High-power factor active valley-fill type alternating current and direct current converter |
| CN103973097A (en) * | 2014-05-07 | 2014-08-06 | 魏其萃 | Active valley-filled alternating-current and direct-current converter for improving power factor efficiency |
| CN104022636A (en) * | 2014-06-19 | 2014-09-03 | 熊晓丹 | High-power factor valley-filled circuit for driving switch type load and switching power supply |
| WO2015103641A1 (en) * | 2014-01-06 | 2015-07-09 | Maxat Touzelbaev | Valley-fill power factor correction circuit with active conduction angle control |
| CN105990865A (en) * | 2015-02-06 | 2016-10-05 | 中兴通讯股份有限公司 | Storage battery device, and charging-discharging monitoring method, device and system thereof |
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| CN107888086A (en) * | 2016-09-27 | 2018-04-06 | 快捷半导体有限公司 | The reduction of the electric size of large value capacitor in portable power source |
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| CN107888086B (en) * | 2016-09-27 | 2021-01-08 | 快捷半导体有限公司 | Reduction of electrical size of large-capacity capacitor in mobile power supply |
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| CN109889075A (en) * | 2019-04-11 | 2019-06-14 | 广东美的制冷设备有限公司 | Drive control circuit and household appliance |
| CN109889072A (en) * | 2019-04-11 | 2019-06-14 | 广东美的制冷设备有限公司 | Drive control circuit and household appliance |
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| CN110165880B (en) * | 2019-05-28 | 2024-04-02 | 苏州浪潮智能科技有限公司 | Circuit and method for stabilizing output voltage of switching circuit |
| CN110165880A (en) * | 2019-05-28 | 2019-08-23 | 苏州浪潮智能科技有限公司 | A kind of circuit and method of stable switch circuit output voltage |
| CN112019031A (en) * | 2019-05-31 | 2020-12-01 | 广东美的制冷设备有限公司 | Operation control method, circuit, household appliance and computer readable storage medium |
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| CN110350808A (en) * | 2019-06-21 | 2019-10-18 | 广州宝善电子科技有限公司 | A kind of high efficiency synchronous rectification circuit |
| CN112234849B (en) * | 2020-09-30 | 2022-06-17 | Oppo广东移动通信有限公司 | Power supply device and charging method |
| CN112234849A (en) * | 2020-09-30 | 2021-01-15 | Oppo广东移动通信有限公司 | Power supply device and charging method |
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Denomination of invention: An active control valley filling circuit and its control method Effective date of registration: 20200916 Granted publication date: 20150513 Pledgee: Industrial Bank Co.,Ltd. Shanghai Minhang sub branch Pledgor: SHANGHAI LOOALL ELECTRONICS Co.,Ltd. Registration number: Y2020980006113 |
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Application publication date: 20130918 Assignee: Shanghai Lingang Financial Leasing Co.,Ltd. Assignor: SHANGHAI LOOALL ELECTRONICS Co.,Ltd. Contract record no.: X2022980015095 Denomination of invention: Actively controlled valley filling circuit and control method thereof Granted publication date: 20150513 License type: Exclusive License Record date: 20220913 |
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