CN202424506U - Single-stage high power factor correction converter with low output power frequency ripple wave - Google Patents
Single-stage high power factor correction converter with low output power frequency ripple wave Download PDFInfo
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- CN202424506U CN202424506U CN2012200100735U CN201220010073U CN202424506U CN 202424506 U CN202424506 U CN 202424506U CN 2012200100735 U CN2012200100735 U CN 2012200100735U CN 201220010073 U CN201220010073 U CN 201220010073U CN 202424506 U CN202424506 U CN 202424506U
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- power factor
- frequency ripple
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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 single-stage high power factor correction converter with a low output power frequency ripple wave. A DC output capacitor of a single-phase PFC (Power Factor Correction) converter is connected in series with an output capacitor of a DC/DC (Direct Current/Direct Current) converter; and the output voltage of the DC/DC converter is controlled to compensate doubled power frequency ripple wave of a DC output voltage of the single-phase PFC converter and further to reduce, even eliminate ripple wave components of the DC output voltage of the single-phase PFC converter and improve dynamic response speed of the PFC converter. While realizing high power factor, the single-stage high power factor correction converter with the low output power frequency ripple wave, disclosed by the utility model, also eliminates output power frequency ripple wave voltage (current) of the single-phase PFC converter, improves dynamic response of the system and also overcomes the problems of low efficiency and high cost of traditional two-stage power factor correction converters.
Description
Technical field
The utility model relates to single-stage high-power rate factor correcting transform method and the device thereof that output series connection DC-DC realizes low output power frequency ripple, relates in particular to the High Power Factor single-stage AC/DC that eliminates the power frequency ripple and isolates and non-isolated switch change-over method.
Background technology
In recent years, power electronic technology develops rapidly, becomes the focus of application and research gradually as the power technology of field of power electronics important component part.Power supply is as the requisite part of various electronic equipments, and the quality of its performance is directly connected to the height of whole system fail safe and reliability.Along with the progress of manufacture technique of power electronic device and Semiconductor Converting Technology, Switching Power Supply has been established its dominant position in field of power supplies so that its efficient is high, power density is high.The Switching Power Supply majority inserts electrical network, the nonlinear circuit that traditional rectifier is made up of diode or thyristor through rectifier.Therefore; There is a fatal weakness in traditional Switching Power Supply; Be power factor lower (generally being merely 0.45～0.75), its can produce a large amount of current harmonicss and reactive power and pollute electrical network in electrical network, and Switching Power Supply has become one of topmost harmonic source in the electrical network at present.To the harm of high order harmonic component, in the world with the form restriction high order harmonic component of legislation, conventional rectifier faced unprecedented challenge far away because of harmonic wave exceeds standard since 1992.The method that suppresses Switching Power Supply generation harmonic wave mainly contains two kinds: the one, and passive means promptly adopts passive filtering or active filter circuit to come bypass or harmonic carcellation; The 2nd, active method promptly designs high-performance rectifier of new generation, it have input current for sinusoidal wave, harmonic content is low and characteristics such as power factor height, promptly has power factor emendation function.Switch power supply power factor is proofreaied and correct the emphasis of research, mainly is the research of circuit of power factor correction topology and the exploitation of Power Factor Correction Control integrated circuit.Multiple circuit of power factor correction topological structures such as existing Buck, Boost, Buck-Boost.The Power Factor Correction Control integrated circuit is responsible for detecting the operating state of converter, and produces pulse signal control switch device, regulates the energy that passes to load and exports with stable; The input current that guarantees Switching Power Supply is simultaneously followed the tracks of the electrical network input voltage, realizes approaching 1 power factor.
Its VD of traditional active power factor correcting converter includes two times of power frequency ripples; If two times of power frequency output voltage ripples are introduced in the power factor correction controller; Can make the input current of power factor correcting converter contain the triple harmonic current composition, reduce the input power factor of power factor correcting converter.So the VD feedback control loop cut-off frequency of traditional APFC converter is low, and (generally be merely 10～20Hz), this has a strong impact on the dynamic response capability of power factor correcting converter to load variations.In addition; Because the VD ripple of APFC converter is bigger, need to connect again that a DC/DC converter improves the stable state accuracy of load VD and to the dynamic response capability of load variations at the power factor correcting converter output.In the application circuit of High Power Factor; The strict input ac voltage of following the tracks of of input current, the input power that exchanges input side also changes, and its change frequency is the twice of AC-input voltage frequency; Through behind the Power Conversion, have twice power frequency ripple on the dc output end filter; And the AC/DC converter bandwidth that has realized High Power Factor is less, bad dynamic performance, ripple normally specified output 2%～20%.
The utility model content
The purpose of the utility model provides a kind of single-stage high-power rate factor correction converter that series connection DC/DC realizes low output power frequency ripple of exporting, and makes it have that dynamic response performance is good, efficient is high, is applicable to the Single-phase PFC converter of various topological structures.
The technical scheme that is adopted is:
A kind of single-stage high-power rate factor correction converter of low output power frequency ripple, the upper end of the last termination load R of Single-phase PFC converter direct current output capacitance C1, the following termination DC/DC converter direct current output capacitance C of Single-phase PFC converter direct current output capacitance C1
2The upper end, the lower end of the following termination load R of DC/DC converter direct current output capacitance C2, simultaneously the lower end ground connection of load R.
Like this, the upper end of the last termination load R of Single-phase PFC converter direct current output capacitance C1, Single-phase PFC converter direct current output capacitance C
1The upper end of following termination DC/DC converter direct current output capacitance C2, the lower end of the following termination load R of DC/DC converter direct current output capacitance C2, the lower end ground connection of the R of load simultaneously.The reference voltage Vref 1 of DC/DC convertor controls unit is the direct voltage with respect to Vout-, and feedback voltage is Vout+.Wherein Vout+ and Vout-are the voltage at final load-side two ends.The input voltage of DC/DC converter is a storage capacitor C3 voltage, and storage capacitor C3 utilizes C4, D3, D2 to obtain energy through the inductance coupling high winding mode of Single-phase PFC converter, and wherein the anode of D3 meets the reference ground Vout-of DC/DC converter.Its control mode can be peak-current mode control etc., obtains the control wave of power switch Q2.The reference voltage Vref 2 of Single-phase PFC convertor controls unit is the tie point PFC_GND with respect to C1 and C2, also is the relative reference ground of pfc controller.Its feedback voltage is the pressure reduction between Vout+ and the PFC_GND.Its control mode can be average-current mode control, monocycle control etc., obtains the control wave of power switch Q1.
Adopt above device can realize the above method of the utility model easily and reliably.
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Description of drawings
Fig. 1 is the system architecture diagram of the utility model.
Fig. 2 is the utility model embodiment one non-isolation type AC/DC converter circuit structural representation
Fig. 3,4,5 is the simulation waveform of a kind of application circuit of embodiment one, simulated conditions input voltage 110Vac/50Hz, maximum load 200W.Boost PFC is operated in the CCM pattern, adopts average-current mode control; Ripple compensation DC/DC converter is peak-current mode control.
Fig. 3 is (200W) ripple compensation DC/DC converter output voltage (PFC_GND-(Vout-)) under the full load conditions, Boost pfc converter output voltage ((Vout+)-PFC_GND), and the voltage ((Vout+)-(Vout-)) of final load end.It is thus clear that the output voltage ripple of the output voltage ripple of DC/DC converter and Boost pfc converter is reverse, amplitude equates, thereby has realized two times of power frequency ripple voltages of low output at load end.
Fig. 4 is (200W) AC-input voltage and the waveform that exchanges input current under the full load situation, and visible input current has well been followed the tracks of input voltage.
When Fig. 5 suddenlys change to 200W for power output from 100W, the waveform of load current (I_R) and load voltage (Vout+), visible this utility model has well improved the dynamic property of system.
Fig. 6 is the utility model embodiment two isolated form AC/DC converter circuit structural representations.
Embodiment
Be the basic scheme of the utility model in Fig. 1: the single-stage high-power rate factor correction converter of low output power frequency ripple is by rectifier filter, the Single-phase PFC converter, and the DC/DC converter is formed.Single-phase PFC converter (single-stage AC/DC) direct current output capacitance C
1The upper end of last termination load R, Single-phase PFC converter direct current output capacitance C
1Following termination DC/DC converter direct current output capacitance C
2The upper end, DC/DC converter direct current output capacitance C
2The lower end of following termination load R, the lower end ground connection of the R of load simultaneously.
Embodiment one
Fig. 2 illustrates, and a kind of embodiment of the utility model does, a kind of control method of Switching Power Supply adopts non-isolation type AC/DC mapping mode, and its concrete practice is:
Exchange input Vac through EMI and rectifier bridge Dbridge, connect the Boost pfc circuit.The upper end of the last termination load R of single phase boost pfc converter direct current output capacitance C1; The upper end of the following termination Buck DC/DC converter output capacitance C2 of single phase boost pfc converter direct current output capacitance C1; The lower end of the following termination load R of Buck DC/DC converter output capacitance C2, the lower end ground connection of the R of load simultaneously.The reference voltage Vref 1 of Buck DC/DC convertor controls unit is the direct voltage with respect to Vout-; Feedback voltage is Vout+.Wherein Vout+ and Vout-are the voltage at final load-side two ends.The input voltage of Buck DC/DC converter is a storage capacitor C3 voltage; Storage capacitor C3 utilizes the inductance coupling high winding of single phase boost pfc converter; Obtain energy through C4, D3, D2, wherein the anode of D3 meets the reference ground Vout-of BuckDC/DC converter.Its control mode can be peak-current mode control etc., obtains power switch Q2 control wave.Single phase boost pfc converter reference voltage Vref 2 is the tie point PFC_GND with respect to C1 and C2, also is the relative reference ground of Boost pfc controller.Its feedback voltage is the pressure reduction between Vout+ and the PFC_GND.Its control mode can be average-current mode control, monocycle control etc., obtains power switch Q1 control wave.
Embodiment two
Fig. 6 illustrates; A kind of embodiment of the utility model does; A kind of control method of Switching Power Supply adopts isolated form single-phase full bridge pfc converter, and its concrete practice is: in this example; Adopt the AC/DC single-phase full bridge circuit of power factor correction of isolated form, and design independently isolated feedback control channel.Compensation is with DC/DC converter using Buck topological structure.The upper end of the last termination load R of single-phase full bridge pfc converter direct current output capacitance C1; The upper end of the following termination Buck DC/DC converter output capacitance C2 of single-phase full bridge pfc converter direct current output capacitance C1; The lower end of the following termination load R of Buck DC/DC converter output capacitance C2, the lower end ground connection of the R of load simultaneously.The path of reference voltage and feedback voltage and case study on implementation one are similar.The input voltage E1 of Buck DC/DC converter can be by independent isolated converter power supply, like topological structures such as flyback.
Obviously; The above direct current output capacitance with the Single-phase PFC converter is connected with the output capacitance of DC/DC converter; The output voltage of control DC/DC converter compensates the method for two times of power frequency ripples of Single-phase PFC converter VD; Can use the direct current output capacitance of Single-phase PFC converter parallelly connected with the output capacitance of DC/DC converter, the output current of control DC/DC converter compensates the symmetrical realization of method of two times of power frequency ripples of Single-phase PFC converter average anode current.
The Single-phase PFC converter topology can be Boost converter, Buck converter, full-bridge converter, anti exciting converter; The DC/DC converter can be Buck, the Boost converter topology.
Claims (2)
1. one kind is hanged down the single-stage high-power rate factor correction converter of exporting the power frequency ripple; By rectifier filter, the Single-phase PFC converter, the DC/DC converter is formed; It is characterized in that: the upper end of the last termination load R of Single-phase PFC converter direct current output capacitance C1; The upper end of the following termination DC/DC converter direct current output capacitance C2 of Single-phase PFC converter direct current output capacitance C1, the lower end of the following termination load R of DC/DC converter direct current output capacitance C2, the lower end ground connection of the R of load simultaneously.
2. the single-stage high-power rate factor correction converter of low output power frequency ripple as claimed in claim 1, wherein the Single-phase PFC converter topology is Boost converter, Buck converter, full-bridge converter, anti exciting converter; The DC/DC converter is Buck, the Boost converter topology.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200100735U CN202424506U (en) | 2012-01-11 | 2012-01-11 | Single-stage high power factor correction converter with low output power frequency ripple wave |
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| CN2012200100735U CN202424506U (en) | 2012-01-11 | 2012-01-11 | Single-stage high power factor correction converter with low output power frequency ripple wave |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104394635A (en) * | 2014-12-04 | 2015-03-04 | 英飞特电子（杭州）股份有限公司 | LED driver |
| CN104540306A (en) * | 2015-01-22 | 2015-04-22 | 英飞特电子（杭州）股份有限公司 | LED driver |
| CN104703346A (en) * | 2015-02-13 | 2015-06-10 | 英飞特电子（杭州）股份有限公司 | LED driver |
-
2012
- 2012-01-11 CN CN2012200100735U patent/CN202424506U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104394635A (en) * | 2014-12-04 | 2015-03-04 | 英飞特电子（杭州）股份有限公司 | LED driver |
| CN104394635B (en) * | 2014-12-04 | 2017-06-13 | 英飞特电子（杭州）股份有限公司 | A kind of LED driver |
| CN104540306A (en) * | 2015-01-22 | 2015-04-22 | 英飞特电子（杭州）股份有限公司 | LED driver |
| CN104703346A (en) * | 2015-02-13 | 2015-06-10 | 英飞特电子（杭州）股份有限公司 | LED driver |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20150111 |
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| EXPY | Termination of patent right or utility model |