CN206650594U - Pfc circuit and supply unit - Google Patents
Pfc circuit and supply unit Download PDFInfo
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- CN206650594U CN206650594U CN201720423739.2U CN201720423739U CN206650594U CN 206650594 U CN206650594 U CN 206650594U CN 201720423739 U CN201720423739 U CN 201720423739U CN 206650594 U CN206650594 U CN 206650594U
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- pfc circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The utility model discloses a kind of pfc circuit and supply unit, the pfc circuit includes power input, multiple rectification filtering modules, boost module, pfc controller and the power output end being correspondingly arranged with rectification filtering module quantity, the input of multiple rectification filtering modules is connected with power input respectively, and the output end of multiple rectification filtering modules and the input of multiple boost modules connect one to one；The output end of multiple boost modules is connected with power output end respectively, and the controlled end of each boost module is connected with the control terminal of pfc controller respectively.The utility model is avoided because the radiator volume of rectifier bridge stack and adaptation is thick and heavy, and cost is higher, the problem of being unfavorable for applying in lightening supply unit and electronic equipment.
Description
Technical field
Electronic circuit technology field is the utility model is related to, more particularly to a kind of pfc circuit and supply unit.
Background technology
At present, in the application of dc source, mostly using the larger power device of a power and one in pfc circuit
Integrated rectifier bridge stack exports after carrying out boosting processing to the power supply of input, to ensure to have relatively high power to export to electric loading,
Correspondingly, it is also desirable to the danger for being adapted to radiator to avoid temperature rise serious and cause dc source hot and be burned out.Big work(
The radiator volume of the power device of rate, integrated rectifier bridge stack and adaptation is thick and heavy, and cost is higher, is unfavorable for applying light
In the supply unit and electronic equipment of thinning.
Utility model content
Main purpose of the present utility model is to propose a kind of pfc circuit and supply unit, it is intended to solve rectifier bridge stack and
The radiator volume of adaptation is thick and heavy, and cost is higher, is unfavorable for applying asking in lightening supply unit and electronic equipment
Topic.
To achieve these goals, the utility model proposes a kind of pfc circuit, including power input, multiple rectifications
Filtration module, boost module, pfc controller and the power output end being correspondingly arranged with the rectification filtering module quantity, it is multiple
The input of the rectification filtering module is connected with the power input respectively, the output end of multiple rectification filtering modules
Connected one to one with the input of multiple boost modules；The output end of multiple boost modules respectively with the power supply
Output end is connected, and the control terminal of the controlled end of each boost module respectively with the pfc controller is connected.
Preferably, each rectification filtering module includes the rectifier bridge and electric capacity being made up of four diodes；The rectification
The input of bridge is the input of the rectification filtering module, and the output end of the rectifier bridge is the defeated of the rectification filtering module
Go out end, and be connected with the first end of the electric capacity；The second end ground connection of the electric capacity.
Preferably, the boost module includes the first inductance, first switch pipe and the first diode, first inductance
First end is the input of the boost module, the input of the second end of first inductance and the first switch pipe and institute
State the anode interconnection of the first diode, the output head grounding of the first switch pipe, the controlled end of the first switch pipe and institute
State the control terminal connection of pfc controller；The negative electrode of first diode is connected with the power output end.
Preferably, the first switch pipe is metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is the input of the first switch pipe,
The source electrode of the metal-oxide-semiconductor is the output end of the first switch pipe, and the grid of the metal-oxide-semiconductor is the controlled of the first switch pipe
End.
Preferably, the pfc circuit also includes the first electric capacity, first end and the power output end of first electric capacity
Connection, the second end ground connection of first electric capacity.
Preferably, the pfc circuit also includes electromagnetic interface filter, and the electromagnetic interface filter is arranged in series in the power input
Between end and the input of multiple rectification filtering modules.
Preferably, the pfc circuit also includes voltage feedback module, and the pfc controller also includes voltage detecting end, institute
The test side for stating voltage feedback module is connected with the power output end, the output end of the voltage feedback module and the PFC
The voltage detecting end connection of controller.
Preferably, the voltage feedback module includes first resistor and second resistance, and the first end of the first resistor is
The test side of the voltage feedback module, the second end of the first resistor are grounded through the second resistance；The second resistance
It is connected with the common port of the second resistance with the voltage detecting end of the pfc controller.
The utility model also proposes a kind of supply unit, and the supply unit includes pfc circuit as described above, described
Pfc circuit includes power input, multiple rectification filtering modules, the boosting mould being correspondingly arranged with the rectification filtering module quantity
Block, pfc controller and power output end, the input of multiple rectification filtering modules connect with the power input respectively
Connect, the output end of multiple rectification filtering modules and the input of multiple boost modules connect one to one；Multiple institutes
The output end for stating boost module is connected with the power output end respectively, the controlled end of each boost module respectively with it is described
The control terminal connection of pfc controller.
The utility model is by setting multiple structure identical rectification filtering modules that AC power is converted into dc source
The boost module that the corresponding electrical connection of output is set afterwards, output is defeated to power supply after dc source is carried out boosting processing by each boost module
Go out end, each boost module structure is identical, and is arranged in parallel so that flow through the total electric current of pfc circuit be equal to flow through each rectifying and wave-filtering
The electric current sum of module and boost module, is arranged such, and in the pfc circuit for needing to meet high-power output, ensures per all the way
While output voltage is constant, the electric current for flowing through pfc circuit is shunted by multiple rectification filtering modules and boost module,
To reduce the electric current for flowing through each component in each rectification filtering module and boost module, and then the power of each component is reduced,
Cause supply unit temperature rise serious because power is too high so as to avoid the component in pfc circuit.The utility model pfc circuit
Rectification filtering module and boost module in each element low power element can be used to realize, and without radiator, so as to drop
Low production cost, while the volume of power panel is also reduced, and then avoid due to each element, rectifier bridge stack and adaptation
Radiator volume is thick and heavy, and cost is higher, the problem of being unfavorable for applying in lightening supply unit and electronic equipment.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the high-level schematic functional block diagram that the utility model pfc circuit is applied in supply unit；
Fig. 2 is the electrical block diagram of the embodiment of pfc circuit one in Fig. 1.
Drawing reference numeral explanation：
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for describing purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical scheme is conflicting or can not realize
The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of pfc circuit.
Reference picture 1 and Fig. 2, in the embodiment of the utility model one, the pfc circuit includes power input Vin, multiple whole
Stream filtration module 10, the boost module 20, pfc controller 30 and the power supply that are correspondingly arranged with the quantity of rectification filtering module 10
Output end vo ut, the input of each rectification filtering module 10 are connected with the power input Vin respectively, each rectification
The output end of filtration module 10 and the input of each boost module 20 connect one to one；Each boost module 20 it is defeated
Go out end to be connected with the power output end Vout, the controlled end of each boost module 20 and the control of the pfc controller 30
Hold P connections.
Wherein, pfc controller 30 includes control terminal P and voltage detecting end F.The control terminal P of pfc controller 30 and each boosting
The controlled end connection of module 20, to control boost module 20 to work, in the present embodiment, using a pfc controller 30 come simultaneously
Multiple boost modules 20 are controlled to work.Certainly in other embodiments, the quantity setting that can also correspond to boost module 20 is multiple
Pfc controller 30 controls each boost module 20 to work respectively.
Each rectification filtering module 10 is used to the AC power progress rectifying and wave-filtering that power input Vin is inputted being converted into directly
Exported after stream power supply.
Each control of the boost module 20 based on pfc controller 30, exported in the control terminal P for receiving pfc controller 30
During control signal, exported after the voltage that rectification filtering module 10 exports is boosted.
The utility model is by setting multiple structure identical rectification filtering modules 10 that AC power is converted into direct current
Export the boost module 20 that corresponding electrical connection is set behind source, each boost module 20 by dc source export after boosting processing to
Power output end Vout, each structure of boost module 20 is identical, and is arranged in parallel so that flows through the total electric current of pfc circuit and is equal to stream
The electric current sum of each rectification filtering module 10 and boost module 20 is crossed, is arranged such, in the PFC electricity for needing to meet high-power output
Lu Zhong, ensure, per while output voltage is constant all the way, the electric current for flowing through pfc circuit to be passed through into multiple Hes of rectification filtering module 10
Boost module 20 is shunted, to reduce the electric current for flowing through each component in each rectification filtering module 10 and boost module 20,
And then the power of each component is reduced, cause supply unit temperature because power is too high so as to avoid the component in pfc circuit
Rise serious.In addition, giving boost module inductance output current respectively by multigroup rectification filtering module, rectifier bridge is avoided directly simultaneously
Join and cause current imbalance, cause rectifier bridge temperature difference.The rectification filtering module 10 of the utility model pfc circuit and boosting
Each element can use low power element to realize in module 20, and without radiator, so as to reduce production cost, go back simultaneously
The volume of power panel is reduced, and then is avoided because the radiator volume of each element, rectifier bridge stack and adaptation is thick and heavy, and into
This is higher, the problem of being unfavorable for applying in lightening supply unit and electronic equipment.
In a preferred embodiment, in the present embodiment, the quantity of rectification filtering module 10 can be two by reference picture 1 and Fig. 2
Individual or two or more, it is preferably two in the present embodiment, as shown in Figure 2.When being arranged to multiple, each rectifying and wave-filtering
Module 10 (Fig. 2 show the first rectification filtering module 10A, the second rectification filtering module 10B) is included by four discrete diodes
The rectifier bridge and electric capacity C1 of composition；The input of the rectifier bridge be the rectification filtering module 10 input, the rectification
The output end of bridge is the output end of the rectification filtering module 10, and is connected with the first end of the electric capacity；The of the electric capacity
Two ends are grounded.
It should be noted that using highly integrated rectifier bridge stack in existing pfc circuit mostly, and flow through rectifier bridge
Electric current is larger, causes temperature rise serious, therefore need to be adapted to corresponding radiator and be radiated to rectifier bridge stack.And rectifier bridge stack and radiating
Device is more thick and heavy, and the power consumption of radiator is big, and cost is high, in order to solve this problem, the rectifying and wave-filtering of the present embodiment first
Module 10A and the second rectification filtering module 10B is respectively adopted four discrete diodes and forms the first rectifier bridge (figure does not indicate)
With two rectifier bridges of the second rectifier bridge (figure does not indicate).Wherein, the first rectifier bridge includes diode D1, D2, D3, D4；Second is whole
Stream bridge includes diode D5, D6, D7, D8, with respectively to the liter of output after the alternating current progress rectification of input to corresponding electrical connection
Die block 20, without being radiated using radiator to rectifier bridge, and the area of power panel shared by discrete diode is small, so as to
The volume of power panel is reduced, and reduces production cost.First rectification filtering module 10A and the second rectification filtering module 10B
In electric capacity C1A and electric capacity C1B be used to filter out alternating component in dc source.
Reference picture 1 and Fig. 2 in a preferred embodiment, correspond to the quantity of rectification filtering module 10, the boost module 20
Quantity can be two or two or more, be preferably two in the present embodiment, as shown in Figure 2.Each boost module 20
The input of (Fig. 2 show the first boost module 20A, the second boost module 20B) respectively with corresponding rectification filtering module 10
Output end connection, output end is connected with power output end Vout respectively, for being exported after the power supply of input is boosted.
In the present embodiment, using two boost modules 20, the first boost module 20A, the second boost module are designated as respectively
20B.Specifically, as shown in Fig. 2 the first boost module 20A includes the first inductance L1A, first switch pipe Q1AAnd the 1st
Pole pipe D1A, the first inductance L1AFirst end be connected with the output end of each rectification filtering module 10, first inductance
L1AThe second end and the first switch pipe Q1AInput and the first diode D1AAnode interconnection, described first opens
Close pipe Q1AOutput head grounding, the first switch pipe Q1AControlled end be connected with the control terminal P of the pfc controller 30；Institute
State the first diode D1ANegative electrode be connected with the power output end Vout.
Wherein, the first diode D1AIt is preferred that the less Schottky diode of forward voltage drop is used, so that more energy are defeated
Go out.First inductance L1AFor converting electrical energy into Magnetic Energy Storage, the first inductance L1ACan be by multiple size identical inductance strings
Connection is set.In the present embodiment, first switch pipe Q1AIt is preferred that using metal-oxide-semiconductor, specifically, the drain electrode of the metal-oxide-semiconductor is described first
Switching tube Q1AInput, the source electrode of metal-oxide-semiconductor is the output end of the first switch pipe Q1A, and the grid of metal-oxide-semiconductor is described first
Switching tube Q1A controlled end.Control of the metal-oxide-semiconductor based on pfc controller 30, receiving the control letter of the output of pfc controller 30
Number when, carry out ON/OFF.Certainly in other embodiments, first switch pipe Q1AOther power tubes can also be used to implement,
This is not restricted.
Specifically, when the drive signal driving metal-oxide-semiconductor conducting of the driving pin P outputs of pfc controller 30, due to the one or two
Pole pipe D1ABuffer action, i.e., in first switch pipe Q1ADuring closure, the first diode D1ACathode voltage forced down than negative electricity,
Now the first diode D1AReverse-biased cut-off, the first inductance L1AMagnetic energy is converted electrical energy into be stored.
When the control signal control metal-oxide-semiconductor shut-off that the control terminal P of pfc controller 30 is exported, now the first diode D1A
Forward conduction.First inductance L1AThe magnetic energy of storage is converted into electric field energy, and this energy with input supply voltage after being superimposed
Pass through the first diode D1AExported after obtaining suitable voltage after progress rectification, because this voltage is supply voltage and the first electricity
Feel L1AMagnetic energy be converted to what is formed after the superposition of electric energy, so now output voltage is higher than input voltage, so as to complete to electricity
The process of source boost in voltage.
With continued reference to Fig. 2, in the present embodiment, the second boost module 20B bags in two boost module 20A of use
Include the second inductance L1B, second switch pipe Q1BAnd the second diode D1B, the second inductance L1BFirst end filtered with each rectification
The output end connection of ripple module 10, the second inductance L1BThe second end and the second switch pipe Q1BInput and described
Second diode D1BAnode interconnection, the second switch pipe Q1BOutput head grounding, the second switch pipe Q1BControlled end
It is connected with the control terminal P of the pfc controller 30；The second diode D1BNegative electrode and the power output end Vout connect
Connect.
Wherein, the second diode D1BIt is preferred that the less Schottky diode of forward voltage drop is used, so that more energy are defeated
Go out.Second inductance L1BFor converting electrical energy into Magnetic Energy Storage, the second inductance L1BCan be by multiple size identical inductance strings
Connection is set.In the present embodiment, second switch pipe Q1BIt is preferred that using metal-oxide-semiconductor, control of the metal-oxide-semiconductor based on pfc controller 30, receiving
To pfc controller 30 export control signal when, carry out ON/OFF.Certainly in other embodiments, second switch pipe Q1BAlso
Other power tubes can be used to implement, this is not restricted.
It is understood that because the second boost module 20B is identical with the first boost module 20A structure, therefore it is former to work
It is also identical to manage technique effect that is identical and reaching, specifically can refer to the first boost module 20A, will not be repeated here.
It will also be appreciated that because the first boost module 20A and the second boost module 20B are arranged in parallel, therefore the first electricity
Feel L1AWith the second inductance L1BParallel connection is also corresponded to, because the inductance of parallel connection can ensure inductance value, while two small inductance
The flexibility of power panel layout is also improved, so as to effectively reduce power supply plate bulk.So, supply unit is also solved in order to protect
Demonstrate,proving powerful output needs to carry out energy storage using the big inductance of inductive energy storage amount, and the energy storage capacity of inductance and its volume are into just
Than, limit supply unit integrally lightening development the problem of.
Reference picture 1 and Fig. 2, in a preferred embodiment, the pfc circuit also include the first electric capacity C1, first electricity
The first end for holding C1 is connected with the power output end Vout, the second end ground connection of the first electric capacity C1.
In the present embodiment, the characteristic according to electric capacity to alternating current impedance very little, the alternating current in dc source enters the first electricity
Hold C1 and be output to ground so that direct current obtains pure direct current, therefore the first electric capacity C1 can realize the exchange filtered out in dc source
The purpose of composition.
Reference picture 1 and Fig. 2, in a preferred embodiment, the pfc circuit also include electromagnetic interface filter 40, the EMI filters
Ripple device 40 is arranged in series between the input of the power input Vin and each rectification filtering module 10.
In the present embodiment, electromagnetic interface filter 40 is used to filter out the high frequency spurs and interference signal in power network, while also to avoid
Caused electromagnetic radiation leakage is to outside in power supply, to reduce interference of the power switch to the external world in itself.
Reference picture 1 and Fig. 2, based on above-described embodiment, the pfc circuit also includes voltage feedback module 50, the PFC controls
Device 30 processed also includes voltage detecting end F, and the test side of the voltage feedback module 50 is connected with the power output end Vout, institute
The output end of voltage feedback module 50 is stated to be connected with the voltage detecting end F of the pfc controller 30.
In the present embodiment, feedback unit 30 is used for the out-put supply for detecting power output end Vout, and feedback signal is defeated
Go out to pfc controller 30, so that pfc controller 30 controls boost module 20 to export surely according to the output voltage values of feedback
Fixed supply voltage, to ensure that supply voltage output is constant.
Further, the voltage feedback module 50 includes first resistor R1 and second resistance R2, the first resistor R1
First end be the voltage feedback module 50 test side, the second end of the first resistor R1 connects through the second resistance R2
Ground；The first resistor R1 and the second resistance R2 common port are connected with the voltage detecting end of the pfc controller 30.
Specifically, first resistor R1 and second resistance R2 series boostings, so as to output feedback signal to pfc controller 30
Signal feeds back pin F, and the output voltage of pfc circuit is detected with realizing, pfc controller 30 feeds back according to voltage detecting end F
Detection signal, control terminal P through pfc controller 30 exports corresponding control signal to drive first switch pipe Q1AOpened with second
Close pipe Q1BON/OFF, so as to ensure the stabilization of output voltage.
The utility model also proposes a kind of supply unit, and the supply unit includes above-mentioned pfc circuit.The pfc circuit
Detailed construction can refer to above-described embodiment, and here is omitted；It is understood that due in the utility model electric equipment
Above-mentioned pfc circuit is used, therefore, the embodiment of the utility model supply unit includes above-mentioned pfc circuit whole embodiments
Whole technical schemes, and the technique effect reached is also identical, will not be repeated here.
Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model,
Every equivalent structure change under inventive concept of the present utility model, made using the utility model specification and accompanying drawing content
Change, or directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.
Claims (9)
1. a kind of pfc circuit, it is characterised in that including power input, multiple rectification filtering modules and the rectifying and wave-filtering mould
Boost module, pfc controller and the power output end that number of blocks is correspondingly arranged, the input point of multiple rectification filtering modules
It is not connected with the power input, the output end of multiple rectification filtering modules and the input of multiple boost modules
Connect one to one；The output end of multiple boost modules is connected with the power output end respectively, each boost module
Control terminal of the controlled end respectively with the pfc controller be connected.
2. pfc circuit as claimed in claim 1, it is characterised in that each rectification filtering module is included by four diodes
The rectifier bridge and electric capacity of composition；The input of the rectifier bridge is the input of the rectification filtering module, the rectifier bridge
Output end is the output end of the rectification filtering module, and is connected with the first end of the electric capacity；Second termination of the electric capacity
Ground.
3. pfc circuit as claimed in claim 1, it is characterised in that the boost module includes the first inductance, first switch pipe
And first diode, the first end of first inductance are the input of the boost module, the second end of first inductance
Interconnected with the input of the first switch pipe and the anode of first diode, the output termination of the first switch pipe
Ground, the controlled end of the first switch pipe are connected with the control terminal of the pfc controller；The negative electrode of first diode and institute
State power output end connection.
4. pfc circuit as claimed in claim 3, it is characterised in that the first switch pipe is metal-oxide-semiconductor, the leakage of the metal-oxide-semiconductor
The input of extremely described first switch pipe, the source electrode of the metal-oxide-semiconductor are the output end of the first switch pipe, the metal-oxide-semiconductor
Grid be the first switch pipe controlled end.
5. pfc circuit as claimed in claim 1, it is characterised in that the pfc circuit also includes the first electric capacity, and described first
The first end of electric capacity is connected with the power output end, the second end ground connection of first electric capacity.
6. pfc circuit as claimed in claim 1, it is characterised in that the pfc circuit also includes electromagnetic interface filter, the EMI
Filters in series is arranged between the input of the power input and multiple rectification filtering modules.
7. the pfc circuit as described in claim 1 to 6 any one, it is characterised in that it is anti-that the pfc circuit also includes voltage
Module is presented, the pfc controller also includes voltage detecting end, the test side of the voltage feedback module and the power output end
Connection, the output end of the voltage feedback module are connected with the voltage detecting end of the pfc controller.
8. pfc circuit as claimed in claim 7, it is characterised in that the voltage feedback module includes first resistor and second
Resistance, the first end of the first resistor are the test side of the voltage feedback module, and the second end of the first resistor is through institute
State second resistance ground connection；The voltage detecting end of the common port of the second resistance and the second resistance and the pfc controller
Connection.
9. a kind of supply unit, it is characterised in that the supply unit includes the PFC as described in claim 1 to 8 any one
Circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720423739.2U CN206650594U (en) | 2017-04-19 | 2017-04-19 | Pfc circuit and supply unit |
| PCT/CN2017/111897 WO2018192219A1 (en) | 2017-04-19 | 2017-11-20 | Pfc circuit and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720423739.2U CN206650594U (en) | 2017-04-19 | 2017-04-19 | Pfc circuit and supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206650594U true CN206650594U (en) | 2017-11-17 |
Family
ID=60276470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720423739.2U Active CN206650594U (en) | 2017-04-19 | 2017-04-19 | Pfc circuit and supply unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN206650594U (en) |
| WO (1) | WO2018192219A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018192219A1 (en) * | 2017-04-19 | 2018-10-25 | 深圳Tcl数字技术有限公司 | Pfc circuit and power supply device |
| CN110336469A (en) * | 2019-07-09 | 2019-10-15 | 奇瑞新能源汽车股份有限公司 | DC converter, charge discharging resisting control method, power circuit, vehicle |
| CN110601549A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
| CN113595419A (en) * | 2021-06-17 | 2021-11-02 | 中国电力科学研究院有限公司 | Power panel of relay protection device and configuration method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352150C (en) * | 2001-12-28 | 2007-11-28 | 中兴通讯股份有限公司 | Power factor correction method and its equipment |
| TWI389444B (en) * | 2008-12-26 | 2013-03-11 | Acbel Polytech Inc | Efficient global switching power supply |
| WO2016096887A1 (en) * | 2014-12-16 | 2016-06-23 | Hella Kgaa Hueck & Co. | Pfc rectifier and method for operating a pfc rectifier |
| CN206650594U (en) * | 2017-04-19 | 2017-11-17 | 深圳Tcl数字技术有限公司 | Pfc circuit and supply unit |
-
2017
- 2017-04-19 CN CN201720423739.2U patent/CN206650594U/en active Active
- 2017-11-20 WO PCT/CN2017/111897 patent/WO2018192219A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018192219A1 (en) * | 2017-04-19 | 2018-10-25 | 深圳Tcl数字技术有限公司 | Pfc circuit and power supply device |
| CN110601549A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
| CN110336469A (en) * | 2019-07-09 | 2019-10-15 | 奇瑞新能源汽车股份有限公司 | DC converter, charge discharging resisting control method, power circuit, vehicle |
| CN110336469B (en) * | 2019-07-09 | 2021-06-29 | 奇瑞新能源汽车股份有限公司 | Direct current converter, charge discharge control method, power supply circuit and vehicle |
| CN113595419A (en) * | 2021-06-17 | 2021-11-02 | 中国电力科学研究院有限公司 | Power panel of relay protection device and configuration method thereof |
| CN113595419B (en) * | 2021-06-17 | 2023-07-28 | 中国电力科学研究院有限公司 | Relay protection device power panel and configuration method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018192219A1 (en) | 2018-10-25 |
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