CN105099161A - PFC circuit and rectifier with PFC circuit - Google Patents
PFC circuit and rectifier with PFC circuit Download PDFInfo
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- CN105099161A CN105099161A CN201410206975.XA CN201410206975A CN105099161A CN 105099161 A CN105099161 A CN 105099161A CN 201410206975 A CN201410206975 A CN 201410206975A CN 105099161 A CN105099161 A CN 105099161A
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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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Abstract
The invention discloses a PFC (Power Factor Correction) circuit, comprising a plurality of PFC modules in parallel connection, wherein each PFC module comprises an energy storage inductor, a switch device and a booster diode; and a control module outputting control signals to the switch device in each PFC module to perform synchronous control on the switch device in each PFC module. According to the invention, the PFC circuit structure is relatively simple, and a control strategy can be compatible with a small power switch device; power is increased mainly through the increase of the parallel number of the switch devices; meanwhile through an existing energy storage inductor, the branch current of parallel switch devices is forced to be balanced dynamically; the circuit has high reliability and cost performance, and provides convenience for different power grade devices to perform modularization design and production. The invention also discloses a rectifier with the PFC circuit.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly a kind of PFC (PowerFactorCorrection, Active PFC) circuit and a kind of rectifying device with this pfc circuit.
Background technology
The severe contamination that the interchange input side harmonic current content caused for solving current rectifying and wave filtering circuit brings to electrical network, stable, the reliable direct voltage simultaneously for providing DC side to frequency conversion load, boost PFC circuit is used widely in frequency conversion product.
Boost PFC circuit the most general at present as shown in Figure 1, wherein alternating current input power supplying Um is after rectification circuit (being made up of four diodes VD1, VD2, VD3 and VD4) rectification, carry out Active PFC through boost PFC circuit again, eventually pass the direct voltage Vout1 of output smoothing after electrochemical capacitor C1 filtering.Pfc circuit is primarily of energy storage inductor L1, switching device IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor) 1, the part such as booster diode D1 and PWM (PulseWidthModulation, pulse-width modulation) control signal composition.
If obtain larger pfc circuit power output, following three kinds of modes are usually adopted to obtain: switching device and the booster diode of 1. directly selecting more high-power grade; 2. on the basis of primary circuit, increase switching device and booster diode make it to be parallel to original device, and such as two IGBT1 and IGBT2 are in parallel, and two booster diode D1 and D2 are in parallel, specifically as shown in Figure 2; 3. adopt interleaved PFC circuit, namely walk abreast in original place of placing single relatively high power pfc circuit the low power PFC module 301 and 302 of placement two, makes two parallel modules with the phase shift alternation of 180 °, specifically as shown in Figure 3.
But, when adopting mode 1., because the device of high-power grade is expensive, application cost can be caused higher; Employing mode 2. time, due to inconsistent and circuit layout asymmetric of the switching device inherent parameters of parallel connection, easily cause switching device electric current in parallel to distribute unbalanced, thus affect the reliability of switching device, the reliability of circuit reduces greatly; Employing mode 3. time, will control two PFC module in parallel with the phase shift alternation of 180 °, circuit design difficulty is large, control algolithm is complicated simultaneously.Therefore, need to improve existing pfc circuit.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason, one object of the present invention is to propose a kind ofly can promote power output grade and the high pfc circuit of reliability.
Another object of the present invention is to propose a kind of rectifying device.
For achieving the above object, a kind of Active PFC pfc circuit that the embodiment of the present invention proposes, comprising: multiple PFC module, described multiple PFC module is parallel with one another, and each described PFC module comprises energy storage inductor, switching device and booster diode; And control module, described control module outputs control signals to switching device in each described PFC module to carry out Synchronization Control to the switching device in each described PFC module.
According to the pfc circuit of the embodiment of the present invention, power output grade is promoted by adopting the mode of multiple PFC module in parallel, primarily of multiple such as two structurally separate, but the PFC module parallel connection formation that control signal is synchronous, wherein each PFC module is by energy storage inductor, switching device and booster diode composition, switching device in multiple such as two PFC module is by same control signal Synchronization Control, when solving multiple switching device parallel running, electric current distributes uneven problem, and utilize the induced electromotive force in energy storage inductor to stop this characteristic of rate of change of each branch current, force each branch current dynamic equilibrium of switching device in parallel.Therefore, the pfc circuit structure of the embodiment of the present invention is relatively simple, and control strategy can be mutually compatible with small power switch device, power ascension mainly realizes by the increase of switching device number in parallel, utilize existing energy storage inductor to force switching device branch current dynamic equilibrium in parallel simultaneously, the reliability of circuit is high, have cost performance high, be convenient to different capacity grade device and carry out the advantage such as modularized design and production.
According to one embodiment of present invention, described switching device is insulated gate bipolar transistor IGBT.
According to one embodiment of present invention, when described multiple PFC module be the first PFC module and the second PFC module time, one end of energy storage inductor in described first PFC module is connected with the first output of rectifier bridge, the other end of the energy storage inductor in described first PFC module is extremely connected with the C of the IGBT in described first PFC module with the anode of the booster diode in described first PFC module, one end of energy storage inductor in described second PFC module is connected with the first output of described rectifier bridge, the other end of the energy storage inductor in described second PFC module is extremely connected with the C of the IGBT in described second PFC module with the anode of the booster diode in described second PFC module, as the first output of described pfc circuit after the negative electrode of the booster diode in described first PFC module is connected with the negative electrode of the booster diode in described second PFC module, be connected with described control module after the G pole of the IGBT in described first PFC module is extremely connected with the G of the IGBT in described second PFC module, as the second output of described pfc circuit after the E pole of the IGBT in described first PFC module is extremely connected with the E of the IGBT in described second PFC module, and the second output of described pfc circuit is connected with the second output of described rectifier bridge.
According to one embodiment of present invention, the IGBT in described first PFC module or described second PFC module and booster diode are by together with IGBT component package.
According to one embodiment of present invention, the IGBT in described first PFC module and the IGBT in described second PFC module adopts a heat abstractor to dispel the heat jointly.
According to one embodiment of present invention, described control module comprises: control chip, and described control chip is for exporting described control signal; Driving chip, described driving chip is connected with described control chip, and described driving chip is connected with E pole with the G pole of the IGBT in E pole and described second PFC module respectively with the G pole of the IGBT in described first PFC module, described driving chip generates drive singal to drive the IGBT in the IGBT in described first PFC module and described second PFC module simultaneously according to described control signal.
Wherein, described pfc circuit also comprises: supply module, and described supply module is connected to provide DC power supply to described driving chip with described driving chip.
According to one embodiment of present invention, described booster diode is fast recovery diode.
In addition, the present invention on the other hand embodiment also proposed a kind of rectifying device, and it comprises above-mentioned pfc circuit.
The rectifying device of the embodiment of the present invention, by adopting above-mentioned pfc circuit, can pass through pfc circuit bring to power grade largely, and structure is relatively simple, and reliability is high, and cost performance is high.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the schematic diagram of general boost PFC circuit;
Fig. 2 is the schematic diagram of the boost PFC circuit of existing employing two IGBT parallel connections;
Fig. 3 is the schematic diagram of existing interleaved PFC circuit;
Fig. 4 is the circuit diagram of the pfc circuit according to the embodiment of the present invention;
Fig. 5 is the circuit diagram of pfc circuit according to an embodiment of the invention; And
Fig. 6 is the circuit diagram of the pfc circuit according to the present invention's specific embodiment.
Embodiment
Be described below in detail embodiments of the invention, 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.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The pfc circuit proposed according to the embodiment of the present invention and the rectifying device with this pfc circuit are described with reference to the accompanying drawings.
Fig. 4 is the circuit diagram of the pfc circuit according to the embodiment of the present invention.As shown in Figure 4, this pfc circuit comprise multiple PFC module 401,402 ..., 40N and control module 400, wherein, N be more than or equal to 2 integer.
As shown in Figure 4, multiple PFC module 401,402 ..., 40N is parallel with one another, each described PFC module comprises energy storage inductor L4, switching device K4 and booster diode D4.Control module 400 outputs control signals to switching device in each described PFC module to carry out Synchronization Control to the switching device in each described PFC module.
According to one embodiment of present invention, as shown in Figure 5, switching device K4 can be insulated gate bipolar transistor IGBT.
Particularly, as shown in Figure 5, when described multiple PFC module be the first PFC module 401 and the second PFC module 402 time, the one end of energy storage inductor L41 in first PFC module 401 is connected with the first output of rectifier bridge 100, the other end of the energy storage inductor L41 in the first PFC module 401 is extremely connected with the C of the IGBT41 in the first PFC module 401 with the anode of the booster diode D41 in the first PFC module 401, the one end of energy storage inductor L42 in second PFC module 402 is connected with the first output of rectifier bridge 100, the other end of the energy storage inductor L42 in the second PFC module 402 is extremely connected with the C of the IGBT42 in the second PFC module 402 with the anode of the booster diode D42 in the second PFC module 402, as the first output of pfc circuit after the negative electrode of the booster diode D41 in the first PFC module 401 is connected with the negative electrode of the booster diode D42 in the second PFC module 402, be connected with control module 400 after the G pole of the IGBT41 in the first PFC module 401 is extremely connected with the G of the IGBT42 in the second PFC module 402, as the second output of pfc circuit after the E pole of the IGBT41 in the first PFC module 401 is extremely connected with the E of the IGBT42 in the second PFC module 402, and the second output of pfc circuit is connected with the second output of rectifier bridge 100.Wherein, rectifier bridge 100 is made up of four diodes VD1, VD2, VD3 and VD4.
In an embodiment of the present invention, booster diode D41, D42 can be fast recovery diode.
In sum, as shown in Figure 5, the pfc circuit of the embodiment of the present invention adopts two structurally separate but modes of the PFC module parallel connection that control signal is synchronous to promote its power output grade.First PFC module 401 is made up of energy storage inductor L41, booster diode D41 and IGBT41, and the second PFC module 402 is made up of energy storage inductor L42, booster diode D42 and IGBT42, IGBT41 and IGBT42 in two PFC module is controlled by same drive singal.
In an embodiment of the present invention, by namely selecting the IGBT of same size model, identical parameters to reduce or eliminate the dynamic current that causes due to device parameter difference own uneven to the selection of IGBT, and uneven by adopting rational topological structure such as circuit topological structure as shown in Figure 5 to eliminate the dynamic current caused by main circuit structure, wiring parasitic parameter etc.
Further, according to one embodiment of present invention, the IGBT in the first PFC module 401 or the second PFC module 402 and booster diode are by together with IGBT component package.Further, the IGBT41 in the first PFC module 401 and IGBT42 in the second PFC module 402 can adopt a heat abstractor to dispel the heat jointly.That is, particularly, following measure can be adopted realize the electric current dynamic equilibrium of two parallel branches: 1. adopt modular IGBT assembly the IGBT in each PFC module and booster diode to be packaged together, make device property consistent as far as possible; 2. select same driving chip, reduce output impedance and the loop stray inductance of driving chip as far as possible; 3. the IGBT in two of parallel connection PFC module is placed on same heat abstractor, makes device operating temperature close as far as possible; The two-way drive singal of the IGBT 4. in two PFC module adopts same control signal to control, to guarantee the synchronous of control signal; 5. adopt current sharing inductor to carry out dynamic current equalizing, namely utilize the induced electromotive force in existing energy storage inductor to stop each branch current rate of change, force two branch current dynamic equilibrium in parallel.
Particularly, according to one embodiment of present invention, as shown in Figure 6, control module 400 comprises: control chip 410 and driving chip 420, and wherein, control chip 410 is for exporting control signal VIN to driving chip 420; Driving chip 420 is connected with control chip 410, and driving chip 420 is connected with E pole with the G pole of the IGBT42 in E pole and the second PFC module 402 respectively with the G pole of the IGBT41 in the first PFC module 401, driving chip 420 generates drive singal to drive the IGBT41 in the first PFC module 401 and IGBT42 in the second PFC module 402 simultaneously according to control signal VIN.
Further, as shown in Figure 6, the pfc circuit of the present embodiment also comprises: supply module 200, and supply module 200 is connected to provide the DC power supply of such as 15V, for driving chip 420 is powered to driving chip 420 with driving chip 420.
In the present embodiment, as shown in Figure 6, the driving chip 420 (can be such as LVIC) that IGBT42 in IGBT41 in first PFC module 401, the second PFC module 402 and this two IGBT shares, two fast recovery diode D41/D42 can form a module such as Mitsubishi IGBT module PS51789, and control chip 410 can adopt the monocycle simulation PFC control chip IR1153 of Int Rectifier Corp.Energy storage inductor L41 and L42 plays the effect of boost inductance and the effect of parallel branch current sharing inductor simultaneously, the control signal VIN Synchronization Control that IGBT41 and IGBT42 is drawn by computing by control chip IR1153.Thus the pfc circuit of the embodiment of the present invention, can improve power grade largely, and two parallel branches have good current-sharing effect.
According to the pfc circuit of the embodiment of the present invention, power output grade is promoted by adopting the mode of multiple PFC module in parallel, primarily of multiple such as two structurally separate, but the PFC module parallel connection formation that control signal is synchronous, wherein each PFC module is by energy storage inductor, switching device and booster diode composition, switching device in multiple such as two PFC module is by same control signal Synchronization Control, when solving multiple switching device parallel running, electric current distributes uneven problem, and utilize the induced electromotive force in energy storage inductor to stop this characteristic of rate of change of each branch current, force each branch current dynamic equilibrium of switching device in parallel.Therefore, the pfc circuit structure of the embodiment of the present invention is relatively simple, and control strategy can be mutually compatible with small power switch device, power ascension mainly realizes by the increase of switching device number in parallel, utilize existing energy storage inductor to force switching device branch current dynamic equilibrium in parallel simultaneously, the reliability of circuit is high, have cost performance high, be convenient to different capacity grade device and carry out the advantage such as modularized design and production.
In addition, embodiments of the invention also proposed a kind of rectifying device, and it comprises above-mentioned pfc circuit.In this rectifying device, also comprise the rectifier bridge be made up of four diodes VD1, VD2, VD3 and VD4 and the filter regulator circuit be made up of filter capacitor and voltage regulation resistance.
The rectifying device of the embodiment of the present invention, by adopting above-mentioned pfc circuit, can pass through pfc circuit bring to power grade largely, and structure is relatively simple, and reliability is high, and cost performance is high.
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 invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (9)
1. an Active PFC pfc circuit, is characterized in that, comprising:
Multiple PFC module, described multiple PFC module is parallel with one another, and each described PFC module comprises energy storage inductor, switching device and booster diode; And
Control module, described control module outputs control signals to switching device in each described PFC module to carry out Synchronization Control to the switching device in each described PFC module.
2. Active PFC pfc circuit as claimed in claim 1, it is characterized in that, described switching device is insulated gate bipolar transistor IGBT.
3. Active PFC pfc circuit as claimed in claim 2, it is characterized in that, when described multiple PFC module be the first PFC module and the second PFC module time, one end of energy storage inductor in described first PFC module is connected with the first output of rectifier bridge, the other end of the energy storage inductor in described first PFC module is extremely connected with the C of the IGBT in described first PFC module with the anode of the booster diode in described first PFC module, one end of energy storage inductor in described second PFC module is connected with the first output of described rectifier bridge, the other end of the energy storage inductor in described second PFC module is extremely connected with the C of the IGBT in described second PFC module with the anode of the booster diode in described second PFC module, as the first output of described pfc circuit after the negative electrode of the booster diode in described first PFC module is connected with the negative electrode of the booster diode in described second PFC module, be connected with described control module after the G pole of the IGBT in described first PFC module is extremely connected with the G of the IGBT in described second PFC module, as the second output of described pfc circuit after the E pole of the IGBT in described first PFC module is extremely connected with the E of the IGBT in described second PFC module, and the second output of described pfc circuit is connected with the second output of described rectifier bridge.
4. Active PFC pfc circuit as claimed in claim 3, is characterized in that, the IGBT in described first PFC module or described second PFC module passes through together with IGBT component package with booster diode.
5. Active PFC pfc circuit as claimed in claim 3, is characterized in that, the IGBT in the IGBT in described first PFC module and described second PFC module adopts a heat abstractor to dispel the heat jointly.
6. Active PFC pfc circuit as claimed in claim 3, it is characterized in that, described control module comprises:
Control chip, described control chip is for exporting described control signal;
Driving chip, described driving chip is connected with described control chip, and described driving chip is connected with E pole with the G pole of the IGBT in E pole and described second PFC module respectively with the G pole of the IGBT in described first PFC module, described driving chip generates drive singal to drive the IGBT in the IGBT in described first PFC module and described second PFC module simultaneously according to described control signal.
7. Active PFC pfc circuit as claimed in claim 6, is characterized in that, also comprise:
Supply module, described supply module is connected to provide DC power supply to described driving chip with described driving chip.
8. the Active PFC pfc circuit according to any one of claim 1-7, is characterized in that, described booster diode is fast recovery diode.
9. a rectifying device, is characterized in that, comprises the Active PFC pfc circuit according to any one of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410206975.XA CN105099161A (en) | 2014-05-15 | 2014-05-15 | PFC circuit and rectifier with PFC circuit |
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| CN201410206975.XA CN105099161A (en) | 2014-05-15 | 2014-05-15 | PFC circuit and rectifier with PFC circuit |
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| CN201410206975.XA Pending CN105099161A (en) | 2014-05-15 | 2014-05-15 | PFC circuit and rectifier with PFC circuit |
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| CN111953197A (en) * | 2020-07-08 | 2020-11-17 | 北京理工大学珠海学院 | Multi-path interleaved PFC control system and method |
| CN113300609A (en) * | 2021-05-24 | 2021-08-24 | 广东东菱电源科技有限公司 | Single-IC-driven multi-path single-stage PFC parallel circuit and working method thereof |
| CN111953197B (en) * | 2020-07-08 | 2024-06-11 | 北京理工大学珠海学院 | Multi-channel staggered PFC control system and method |
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