CN204597773U - Power factor correction PFC circuit - Google Patents
Power factor correction PFC circuit Download PDFInfo
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- CN204597773U CN204597773U CN201520177155.2U CN201520177155U CN204597773U CN 204597773 U CN204597773 U CN 204597773U CN 201520177155 U CN201520177155 U CN 201520177155U CN 204597773 U CN204597773 U CN 204597773U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- 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
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Abstract
The utility model discloses a kind of power factor correction pfc circuit, comprising: the first inductance; First switch element, it comprises the first switching tube of differential concatenation and second switch pipe and first diode in parallel with the first switching tube of differential concatenation and second switch pipe; Second switch unit, it comprise the 3rd switching tube of differential concatenation and the 4th switching tube and with the 3rd switching tube of differential concatenation and the second diode of the 4th paralleled power switches, the first end of second switch unit is connected with the first end of the first switch element; 3rd diode, the anode of the 3rd diode is connected with the second end of the first switch element; 4th diode, the negative electrode of the 4th diode is connected with the second end of second switch unit, and the anode of the 4th diode is connected with the negative electrode of the 3rd diode; Drive circuit, for driving conducting and the closedown of the first switch element and second switch unit, thus, reliablely and stablely can work in ccm mode, and improve efficiency and power density.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of power factor correction pfc circuit.
Background technology
Due to the important component part that circuit of power factor correction is power technology, so all have higher requirement to the efficiency of circuit of power factor correction, power density and reliability etc.Correlation technique proposes a kind of Bridgeless power factor circuit correcting circuit as shown in Figure 1, but in ccm mode, range of application is smaller in the work that correlation technique can not be reliable and stable because of the impact of the reverse recovery current of body diode in switching tube.
Correlation technique also proposed a kind of Bridgeless power factor circuit correcting circuit as shown in Figure 2, correlation technique solves the impact that body diode reverse restoring current brings, CCM pattern can be operated in, but inductive current charging and discharging all needs through two diodes, thus efficiency is made to can not get improving.
Therefore, there are the needs improved in correlation technique.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the purpose of this utility model is to propose a kind of power factor correction pfc circuit, and this power factor correction pfc circuit can reliablely and stablely work in ccm mode, and further increases efficiency.
To achieve these goals, the utility model proposes a kind of power factor correction pfc circuit, comprising: the first inductance, the first end of described first inductance is as the first input end of described pfc circuit; First switch element, described first switch element comprises the first switching tube of differential concatenation and second switch pipe and first diode in parallel with the first switching tube of described differential concatenation and second switch pipe; Second switch unit, described second switch unit comprise the 3rd switching tube of differential concatenation and the 4th switching tube and with the 3rd switching tube of described differential concatenation and the second diode of the 4th paralleled power switches, the first end of described second switch unit is connected with the first end of described first switch element, between described second switch unit and described first switch element, there is first node, wherein, described first node is connected with the second end of described first inductance; 3rd diode, the anode of described 3rd diode is connected with the second end of described first switch element, and the anode of described 3rd diode is as the first output of described pfc circuit; 4th diode, the negative electrode of described 4th diode is connected with the second end of described second switch unit, the negative electrode of described 4th diode is as the second output of described pfc circuit, the anode of described 4th diode is connected with the negative electrode of described 3rd diode, have Section Point between described 4th diode and described 3rd diode, described Section Point is as the second input of described pfc circuit; Drive circuit, described drive circuit is connected with the control end of described second switch unit with the control end of described first switch element respectively, and described drive circuit is for driving conducting and the cut out of described first switch element and described second switch unit.
According to the power factor correction pfc circuit that the utility model proposes, first switch element comprises the first switching tube and the second switch pipe of differential concatenation, and first diode in parallel with the first switching tube of differential concatenation and second switch pipe, second switch unit comprises the 3rd switching tube and the 4th switching tube of differential concatenation, and with the 3rd switching tube of differential concatenation and the second diode of the 4th paralleled power switches, thus, the adverse effect that in switching tube, the reverse recovery current of body diode brings can be eliminated, pfc circuit can reliablely and stablely be worked in ccm mode, and further increase efficiency and power density, to be reflected more clearly at some large-power occasions odds for effectiveness.
Particularly, described first switching tube and described second switch pipe correspond to the first metal-oxide-semiconductor and the second metal-oxide-semiconductor respectively, wherein, the source electrode of described first metal-oxide-semiconductor is connected with the source electrode of described second metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is as the first end of described first switch element, the drain electrode of described second metal-oxide-semiconductor is as the second end of described first switch element, as the control end of described first switch element after the grid of described first metal-oxide-semiconductor is connected with the grid of described second metal-oxide-semiconductor, the negative electrode of described first diode is connected with the drain electrode of described first metal-oxide-semiconductor, the anode of described first diode is connected with the drain electrode of described second metal-oxide-semiconductor.
Further, described 3rd switching tube and described 4th switching tube correspond to the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor respectively, wherein, the source electrode of described 3rd metal-oxide-semiconductor is connected with the source electrode of described 4th metal-oxide-semiconductor, the drain electrode of described 3rd metal-oxide-semiconductor is connected with the drain electrode of described first metal-oxide-semiconductor as the first end of described second switch unit, the drain electrode of described 4th metal-oxide-semiconductor is as the second end of described second switch unit, as the control end of described second switch unit after the grid of described 3rd metal-oxide-semiconductor is connected with the grid of described 4th metal-oxide-semiconductor, the anode of described second diode is connected with the drain electrode of described 3rd metal-oxide-semiconductor, the negative electrode of described second diode is connected with the drain electrode of described 4th metal-oxide-semiconductor.
Particularly, described first diode and described second diode can be SiC diode, fast recovery diode or GaN diode.
Further, when described first inductance is multiple, described first switch element and second switch unit are multiple, and the second end of each first inductance is all connected with the first node between the first corresponding switch element and second switch unit.
Further, described power factor correction pfc circuit also comprises: the first electric capacity, and the first end of described first electric capacity is connected with the first output of described pfc circuit, and the second end of described first electric capacity is connected with the second output of described pfc circuit.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of Bridgeless power factor correction pfc circuit in a correlation technique;
Fig. 2 is the circuit theory diagrams of Bridgeless power factor correction pfc circuit in another correlation technique;
Fig. 3 is the circuit theory diagrams of the power factor correction pfc circuit according to the utility model embodiment;
Fig. 4 is the circuit theory diagrams of the power factor correction pfc circuit according to the utility model embodiment; And
Fig. 5 is the circuit theory diagrams of the power factor correction pfc circuit according to the utility model preferred embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The circuit working principle of correlation technique once is simply described below first.
As shown in Figure 1, when Bridgeless power factor circuit correcting circuit is operated in CCM (Continuous Conduction Mode, continuous conduction mode) pattern time, suppose the positive half cycle at AC power AC ', now the first switching tube S1 ' conducting, AC power AC ' through the first switching tube S1 ' and the first diode D1 ' to inductance L ' charging; After charging, close the first switching tube S1 ' and conducting second switch pipe S2 ', inductance L ' discharge through second switch pipe S2 ' and the second diode D2 '; In ccm mode, second switch pipe S2 ' is closed when inductive current does not also reach zero, after closing, inductive current is switched to and continues afterflow by the body diode of second switch pipe S2 ', now conducting first switching tube S1 ', second switch pipe S2 ' closes under the effect of the back-pressure of bus electrolytic capacitor C1 '.The inductive current flow through due to the body diode of second switch pipe S2 ' in this process is non-vanishing, thus the body diode of the second switch pipe S2 ' integrity problem that there is a reverse recovery current and cause the first switching tube S1 ' and second switch pipe S2 ' straight-through or circuit can not the problem of steady operation.
As shown in Figure 2, suppose the positive half cycle at AC power AC ', now the first switching tube S1 ' conducting, AC power AC ' through the 6th diode D6 ', the first switching tube S1 ' and the first diode D1 ' to inductance L ' charging; After charging, close the first switching tube S1 ' and conducting second switch pipe S2 ', inductance L ' discharge through the second diode D2 ', the 4th diode D4 ' and second switch pipe S2 '; Close second switch pipe S2 ' when inductive current does not also reach zero, after closing, inductive current continues afterflow through the 3rd diode D3 ' and the first diode D1 '.Thus, correlation technique can well solve the problem of body diode reverse restoring current, but inductive current all needed through two diodes in charging stage and discharge regime, thus efficiency is had a greatly reduced quality.
Based on the problems referred to above, the utility model proposes a kind of circuit of power factor correction.
Describe power factor correction PFC (Power FactorCorrection, the power factor correction) circuit of the utility model embodiment proposition below in conjunction with Fig. 3-Fig. 5, power factor correction pfc circuit is for improving the power factor of power supply.
Fig. 3 is the circuit theory diagrams of the power factor correction pfc circuit according to the utility model embodiment.As shown in Figure 3, power factor correction pfc circuit comprises: the first inductance L 1, first switch element 10, second switch unit 20, the 3rd diode D3, the 4th diode D4 and drive circuit 30.
Wherein, the first end of the first inductance L 1 is as the first input end IN1 of pfc circuit; First switch element 10 comprises the first switching tube of differential concatenation and second switch pipe and the first diode D1 in parallel with the first switching tube of differential concatenation and second switch pipe; Second switch unit 20 comprise the 3rd switching tube of differential concatenation and the 4th switching tube and with the 3rd switching tube of differential concatenation and the second diode D2 of the 4th paralleled power switches, the first end of second switch unit 20 is connected with the first end of the first switch element 10, have first node m between second switch unit 20 and the first switch element 10, first node m is connected with the second end of the first inductance L 1; The anode of the 3rd diode D3 is connected with the second end of the first switch element 10, and the anode of the 3rd diode D3 is as the first output OUT1 of pfc circuit; The negative electrode of the 4th diode D4 is connected with the second end of second switch unit 20, the negative electrode of the 4th diode D4 is as the second output OUT2 of pfc circuit, the anode of the 4th diode D4 is connected with the negative electrode of the 3rd diode D3, have Section Point n between 4th diode D4 and the 3rd diode D3, Section Point n is as the second input IN2 of pfc circuit.
Drive circuit 30 is connected with the control end of second switch unit 20 with the control end of the first switch element 10 respectively, and drive circuit 30 is for driving conducting and the cut out of the first switch element 10 and second switch unit 20.That is, drive circuit 30 can export the first drive singal to control conducting and the cut out of the first switch element 10 to the first switch element 10, and drive circuit 30 also can export the second drive singal to control conducting and the cut out of second switch unit 20 to second switch unit 20.
In addition, as the example of Fig. 4, the first input end IN1 of pfc circuit can be connected with the second end with the first end of AC power AC respectively with the second input IN2, first output OUT1 of pfc circuit can be connected with the second end with the first end of load RL respectively with the second output OUT2, thus, AC power AC is supplied to load RL after power factor correction, thus provides energy utilization rate.
It should be noted that, the controller of pfc circuit can be controlled drive circuit 30 according to the alternating current of AC power AC input, to be controlled the first switch element 10 and second switch unit 20 by drive circuit 30.
Specifically, after pfc circuit is started working, if controller judges the positive half cycle at AC power AC, namely electric current is greater than 0, then control the first switch element 10 conducting by drive circuit 30, first switching tube of AC power AC in the first switch element 10 and second switch pipe and the 3rd diode D3 are that the first inductance L 1 is charged; After charging, such as controller judges the negative half period entering AC power AC, control the first switch element 10 by drive circuit 30 close and control second switch unit 20 conducting, now three switching tube of the first inductance L 1 in second switch unit 20 and the 4th switching tube and the 4th diode D4 discharge; In ccm mode, controller can control second switch unit 20 after the Preset Time after entering negative half period and cut out, second switch unit 20 is closed during also not reach zero at inductive current, after closing, inductive current is switched to and continues afterflow by the second diode D2 in second switch unit 20, wherein, Preset Time can set as required, and afterwards when judging that AC power AC enters positive half cycle again, controller controls the first switch element 10 conducting by drive circuit 30.
More specifically, as the example of Fig. 3 and Fig. 4, first switching tube and second switch pipe correspond to the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 respectively, wherein, the source electrode of the first metal-oxide-semiconductor S1 is connected with the source electrode of the second metal-oxide-semiconductor S2, the drain electrode of the first metal-oxide-semiconductor S1 is as the first end of the first switch element 10, the drain electrode of the second metal-oxide-semiconductor S2 is as the second end of the first switch element 10, as the control end of the first switch element 10 after the grid of the first metal-oxide-semiconductor S1 is connected with the grid of the second metal-oxide-semiconductor S2, the negative electrode of the first diode D1 is connected with the drain electrode of the first metal-oxide-semiconductor S1, the anode of the first diode D1 is connected with the drain electrode of the second metal-oxide-semiconductor S2.
More specifically, as the example of Fig. 3 and Fig. 4, 3rd switching tube and the 4th switching tube correspond to the 3rd metal-oxide-semiconductor S3 and the 4th metal-oxide-semiconductor S4 respectively, wherein, the source electrode of the 3rd metal-oxide-semiconductor S3 is connected with the source electrode of the 4th metal-oxide-semiconductor S4, the drain electrode of the 3rd metal-oxide-semiconductor S3 is connected with the drain electrode of the first metal-oxide-semiconductor S1 as the first end of second switch unit 20, the drain electrode of the 4th metal-oxide-semiconductor S4 is as the second end of second switch unit 20, as the control end of second switch unit 20 after the grid of the 3rd metal-oxide-semiconductor S3 is connected with the grid of the 4th metal-oxide-semiconductor S4, the anode of the second diode D2 is connected with the drain electrode of the 3rd metal-oxide-semiconductor S3, the negative electrode of the second diode D2 is connected with the drain electrode of the 4th metal-oxide-semiconductor S4.
That is, compared with the correlation technique of Fig. 1, the first switching tube S1 ' that the utility model embodiment adopts two metal-oxide-semiconductors and diode to come in alternate figures 1.Particularly, first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 partners to top switch, their source class links together, as the source class of the first switching tube S1 ' in Fig. 1 after the anode of the first diode D1 is connected with the drain electrode of the second metal-oxide-semiconductor S2, as the drain electrode of the first switching tube S1 ' in Fig. 1 after the negative electrode of the first diode D1 is connected with the drain electrode of the first metal-oxide-semiconductor S1, so replace the first switching tube S1 ' in Fig. 1.
In like manner, the utility model embodiment second switch pipe S2 ' of adopting two metal-oxide-semiconductors and diode to come in alternate figures 1 equally.Particularly, 3rd metal-oxide-semiconductor S3 and the 4th metal-oxide-semiconductor S4 partners to top switch, their source class links together, as the source class of second switch pipe S2 ' in Fig. 1 after the anode of the second diode D2 is connected with the drain electrode of the 3rd metal-oxide-semiconductor S3, as the drain electrode of the second switch pipe S2 ' in Fig. 1 after the negative electrode of the second diode D2 is connected with the drain electrode of the 4th metal-oxide-semiconductor S4, so replace the second switch pipe S2 ' in Fig. 1.
Further, the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 shares a road drive singal, and the 3rd metal-oxide-semiconductor S3 and the 4th metal-oxide-semiconductor S4 shares another road drive singal.
Further, according to an embodiment of the present utility model, as shown in Figure 4, power factor correction pfc circuit also comprises: the first electric capacity C1, the first end of the first electric capacity C1 is connected with the first output OUT1 of pfc circuit, and second end of the first electric capacity C1 is connected with the second output OUT2 of pfc circuit.
In addition, according to a concrete example of the present utility model, the first diode D1 and the second diode D2 can be SiC diode, fast recovery diode or GaN diode.
As mentioned above, in the utility model embodiment, when the positive half cycle of AC power AC, the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 conducting, electric current warp is that namely the first inductance L 1 energy storage charges to a metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2 on top and the 3rd diode D3; After the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 close, the 3rd metal-oxide-semiconductor S3 and the 4th metal-oxide-semiconductor S4 conducting, electric current is through the first inductance L 1, namely discharge to the 3rd metal-oxide-semiconductor S3, the 4th metal-oxide-semiconductor S4 on top and the 4th diode D2 afterflow; The predetermined time before driving the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 conducting is started when next cycle, the 3rd metal-oxide-semiconductor S3 pushed up and the 4th metal-oxide-semiconductor S4 is closed, namely the switching between the first switch element 10 and second switch unit 20 can arrange certain Dead Time, and electric current continues afterflow through the first inductance L 1, second diode D2 and the 3rd diode D3.Like this when the first metal-oxide-semiconductor S1 and the second metal-oxide-semiconductor S2 conducting, the second diode D2 is only had to there is reverse recovery current, and the second diode D2 is the diode that reverse recovery characteristic is good, essentially eliminate the integrity problem that reverse recovery current causes, also further increase the efficiency of losing because of Reverse recovery.
And, compared with the correlation technique of Fig. 2, the electric current of the utility model embodiment charges through S1, S2 and D3, and discharge through S3, S4 and D2, without the need to carrying out charging and discharging by two diodes, thus in efficiency, have more advantage and along with the advantage in the increase efficiency of load will be more obvious.
According to embodiments more of the present utility model, when the first inductance L 1 is multiple, first switch element 10 and second switch unit 20 are multiple, multiple first inductance L 1 is corresponding with multiple first switch element 10 and second switch unit 20, and the second end of each first inductance L 1 is all connected with the first node m between the first corresponding switch element 10 and second switch unit 20.
Preferably, as shown in Figure 5, the first inductance L 1 can be two, and the first corresponding switch element 10 and second switch unit 20 also can be two.Two the first inductance corresponding inductance L 11 and inductance L 12 respectively, two the first switch elements 10 corresponding switch element 11 and switch element 12 respectively, two second switch unit 20 corresponding switch element 21 and switch element 22 respectively, wherein, the first end of inductance L 11 is connected with the first end of AC power AC, and the second end of inductance L 11 is connected with the first node m between switch element 11 and switch element 21; Accordingly, the first end of inductance L 12 is connected with the first end of AC power AC, and the second end of inductance L 12 is connected with the first node m between switch element 12 and switch element 22.
In sum, according to the power factor correction pfc circuit that the utility model proposes, first switch element comprises the first switching tube and the second switch pipe of differential concatenation, and first diode in parallel with the first switching tube of differential concatenation and second switch pipe, second switch unit comprises the 3rd switching tube and the 4th switching tube of differential concatenation, and with the 3rd switching tube of differential concatenation and the second diode of the 4th paralleled power switches, thus, the adverse effect that in switching tube, the reverse recovery current of body diode brings can be eliminated, pfc circuit can reliablely and stablely be worked in ccm mode, and further increase efficiency and power density, to be reflected more clearly at some large-power occasions odds for effectiveness.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (6)
1. a power factor correction pfc circuit, is characterized in that, comprising:
First inductance, the first end of described first inductance is as the first input end of described pfc circuit;
First switch element, described first switch element comprises the first switching tube of differential concatenation and second switch pipe and first diode in parallel with the first switching tube of described differential concatenation and second switch pipe;
Second switch unit, described second switch unit comprise the 3rd switching tube of differential concatenation and the 4th switching tube and with the 3rd switching tube of described differential concatenation and the second diode of the 4th paralleled power switches, the first end of described second switch unit is connected with the first end of described first switch element, between described second switch unit and described first switch element, there is first node, wherein, described first node is connected with the second end of described first inductance;
3rd diode, the anode of described 3rd diode is connected with the second end of described first switch element, and the anode of described 3rd diode is as the first output of described pfc circuit;
4th diode, the negative electrode of described 4th diode is connected with the second end of described second switch unit, the negative electrode of described 4th diode is as the second output of described pfc circuit, the anode of described 4th diode is connected with the negative electrode of described 3rd diode, have Section Point between described 4th diode and described 3rd diode, described Section Point is as the second input of described pfc circuit;
Drive circuit, described drive circuit is connected with the control end of described second switch unit with the control end of described first switch element respectively, and described drive circuit is for driving conducting and the cut out of described first switch element and described second switch unit.
2. power factor correction pfc circuit as claimed in claim 1, it is characterized in that, described first switching tube and described second switch pipe correspond to the first metal-oxide-semiconductor and the second metal-oxide-semiconductor respectively, wherein, the source electrode of described first metal-oxide-semiconductor is connected with the source electrode of described second metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is as the first end of described first switch element, the drain electrode of described second metal-oxide-semiconductor is as the second end of described first switch element, as the control end of described first switch element after the grid of described first metal-oxide-semiconductor is connected with the grid of described second metal-oxide-semiconductor, the negative electrode of described first diode is connected with the drain electrode of described first metal-oxide-semiconductor, the anode of described first diode is connected with the drain electrode of described second metal-oxide-semiconductor.
3. power factor correction pfc circuit as claimed in claim 2, it is characterized in that, described 3rd switching tube and described 4th switching tube correspond to the 3rd metal-oxide-semiconductor and the 4th metal-oxide-semiconductor respectively, wherein, the source electrode of described 3rd metal-oxide-semiconductor is connected with the source electrode of described 4th metal-oxide-semiconductor, the drain electrode of described 3rd metal-oxide-semiconductor is connected with the drain electrode of described first metal-oxide-semiconductor as the first end of described second switch unit, the drain electrode of described 4th metal-oxide-semiconductor is as the second end of described second switch unit, as the control end of described second switch unit after the grid of described 3rd metal-oxide-semiconductor is connected with the grid of described 4th metal-oxide-semiconductor, the anode of described second diode is connected with the drain electrode of described 3rd metal-oxide-semiconductor, the negative electrode of described second diode is connected with the drain electrode of described 4th metal-oxide-semiconductor.
4. the power factor correction pfc circuit according to any one of claim 1-3, is characterized in that, described first diode and described second diode are SiC diode, fast recovery diode or GaN diode.
5. power factor correction pfc circuit as claimed in claim 1, it is characterized in that, when described first inductance is multiple, described first switch element and second switch unit are multiple, and the second end of each first inductance is all connected with the first node between the first corresponding switch element and second switch unit.
6. power factor correction pfc circuit as claimed in claim 1, it is characterized in that, also comprise: the first electric capacity, the first end of described first electric capacity is connected with the first output of described pfc circuit, and the second end of described first electric capacity is connected with the second output of described pfc circuit.
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| CN201520177155.2U CN204597773U (en) | 2015-03-27 | 2015-03-27 | Power factor correction PFC circuit |
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| CN201520177155.2U CN204597773U (en) | 2015-03-27 | 2015-03-27 | Power factor correction PFC circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655859A (en) * | 2016-08-19 | 2017-05-10 | 南京航空航天大学 | Bridge arm of motor driving circuit and control method thereof |
| US10666164B2 (en) | 2015-12-22 | 2020-05-26 | Huawei Technologies Co., Ltd. | Bidirectional power conversion circuit and bidirectional power converter |
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2015
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10666164B2 (en) | 2015-12-22 | 2020-05-26 | Huawei Technologies Co., Ltd. | Bidirectional power conversion circuit and bidirectional power converter |
| CN106655859A (en) * | 2016-08-19 | 2017-05-10 | 南京航空航天大学 | Bridge arm of motor driving circuit and control method thereof |
| CN106655859B (en) * | 2016-08-19 | 2019-10-11 | 南京航空航天大学 | A kind of bridge arm and its control method for motor-drive circuit |
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