CN102427293A - Low output ripple wave parallel power-factor correction (PFC) transform control method and device - Google Patents

Low output ripple wave parallel power-factor correction (PFC) transform control method and device Download PDF

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Publication number
CN102427293A
CN102427293A CN2012100071972A CN201210007197A CN102427293A CN 102427293 A CN102427293 A CN 102427293A CN 2012100071972 A CN2012100071972 A CN 2012100071972A CN 201210007197 A CN201210007197 A CN 201210007197A CN 102427293 A CN102427293 A CN 102427293A
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converter
output
control
load
power supply
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CN2012100071972A
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许建平
阎铁生
张婓
高建龙
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Southwest Jiaotong University
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Southwest Jiaotong University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The invention discloses a low output ripple wave parallel power-factor correction (PFC) transform control method and device. The output end of a single-phase PFC convertor (TD) is connected in parallel with the output end of a DC (direct current)/DC convertor (DC-DC), and meanwhile energy is supplied to a load; the output positive end of the single-phase PFC convertor is mutually connected with the output positive end of the DC/DC convertor so as to form a 'Vo+' end, and meanwhile, the 'Vo+' end is connected with the positive end of the load; the output negative end of the single-phase PFC convertor is mutually connected with the output negative end of the DC/DC convertor so as to form a 'Vo-' end, and meanwhile, and the 'Vo-' end is connected with the negative end of the load; an input power supply of the DC/DC convertor is an auxiliary power supply; and an input source of the auxiliary power supply can generate the output of a rectifier circuit (REC), and the single-phase PFC convertor (TD) also can generate the output of the rectifier circuit (REC). The control method provided by the invention has the advantages of eliminating double line frequency output ripples of the traditional PFC convertor, meanwhile, improving the dynamic response of a system, and overcoming the problems that the traditional two-stage power-factor correction convertor is low in efficiency and high in cost.

Description

A kind of parallelly connected power factor correction conversion control method and device thereof of output ripple and low
Technical field
The present invention relates to a kind of output ripple and low high efficiency pfc converter method for designing and device thereof.
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.Switching Power Supply has been established its dominant position in field of power supplies so that its efficient is high, power density is high; But can there be a fatal weakness in it when inserting electrical network through rectifier: power factor lower (generally being merely 0.45~0.75), and in electrical network, can produce a large amount of current harmonicss and reactive power and pollute electrical network.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, anti exciting converter.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.The control method decision that the structure of control integrated circuit and operation principle are adopted by Switching Power Supply.For same power circuit topology, adopt the Different control method to exert an influence to aspects such as the stable state accuracy of Switching Power Supply and dynamic properties.
Traditional active power factor correcting converter VD/electric current 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 after the very big output capacitance of capacitance of power factor correcting converter output termination; Need connect again also that a DC/DC converter improves the stable state accuracy of load VD and to the dynamic response capability of load variations, make that the converter design cost is high, efficient is low.
Summary of the invention
The parallelly connected power factor correction conversion control method that the purpose of this invention is to provide a kind of output ripple and low; Adopt this method that Single-phase PFC converter output voltage ripple is reduced; And its dynamic response performance is good; Efficient is high, and antijamming capability is strong, is applicable to the Single-phase PFC converter of various topological structures.
The present invention realizes its goal of the invention, and the technical scheme that is adopted is: the parallelly connected power factor correction conversion control method of output ripple and low, and its concrete practice is:
The output of the output of single-phase power factor correcting converter and DC/DC converter is in parallel, and to load energy is provided simultaneously.Formations " Vo+ " that is connected with the anode of DC/DC converter output of the anode of Single-phase PFC converter output is held, and " Vo+ " holds the anode that is connected on load simultaneously; Formations " Vo-" that is connected with the negative terminal of DC/DC converter output of the negative terminal of Single-phase PFC converter output is held, and " Vo-" holds the negative terminal that is connected on load simultaneously.The input power supply of DC/DC converter is an accessory power supply, and the input source of accessory power supply is that direct output from rectifier bridge is perhaps produced by the Single-phase PFC converter.When the input source of accessory power supply is during directly from the output of rectifier bridge, auxiliary source has the function of power factor correction.
Like this, when whole switch power supply system was the power supply of constant output voltage, Single-phase PFC converter and DC/DC converter used same output voltage sampling circuit, and this output voltage sampling circuit detects the voltage at load two ends; When whole switch power supply system is the power supply of constant output electric current; The Single-phase PFC converter uses different output current sample circuits with the DC/DC converter; Be in series with load again after the output current sample circuit series connection of two converters; The output current of Single-phase PFC converter flows through two output current sample circuits and load simultaneously, and the output current of DC/DC converter (DC-DC) only flows through self current sampling circuit and load.The classical PFC control strategy (peak-current mode control, average-current mode control, voltage mode control) of single-phase power factor correcting converter using obtains the control signal of power factor correcting converter.Because classical Power Factor Correction Control loop bandwidth is very low; The output energy of single-phase power factor correcting converter has two times of very big power frequency pulsation; The output of the output of DC/DC converter and Single-phase PFC converter is in parallel; Adopt the control loop of DC/DC converter high bandwidth; Make the output energy of DC/DC converter will compensate two times of power frequency pulsation of pfc converter output energy, thereby eliminated two times of power frequency output ripples of traditional single phase pfc converter, make switch power supply system realize low output voltage/current ripples.
Compared with prior art, the invention has the beneficial effects as follows:
1, with respect to existing power factor correcting converter; When adopting power factor correcting converter of the present invention to work in stable state; Reduced the VD/current ripples of load effectively, helped the converter current rectifying and wave filtering circuit and select less output capacitance for use; 2, adopt power factor correcting converter of the present invention can improve the cut-off frequency of output voltage feedback control loop, when load was undergone mutation, the controller of DC/DC converter can make an immediate response, and made converter get into new stable state rapidly; 3, adopt the power factor correcting converter of inventing to need not the DC/DC converter of back level; Only need a low power DC/DC converter compensation ripple; Make most of power output only through the one-level Power Conversion, improved the efficient of whole switching power converters complete machine.
Another object of the present invention provides a kind of device of realizing above Switching Power Supply method for designing.
The present invention realizes that the technical scheme of this device is: the parallelly connected power factor correction conversion control apparatus of output ripple and low, form by Single-phase PFC converter, DC/DC converter (DC-DC), rectification circuit (REC) and accessory power supply (AP); The output of the output of single-phase power factor correcting converter and DC/DC converter is in parallel, and to load energy is provided simultaneously.Formations " Vo+ " that is connected with the anode of DC/DC converter output of the anode of Single-phase PFC converter output is held, and " Vo+ " holds the anode that is connected on load simultaneously; Formations " Vo-" that is connected with the negative terminal of DC/DC converter output of the negative terminal of Single-phase PFC converter output is held, and " Vo-" holds the negative terminal that is connected on load simultaneously.The input power supply of DC/DC converter is an accessory power supply, and the input source of accessory power supply is that direct output from rectifier bridge is perhaps produced by the Single-phase PFC converter.
Like this, when the input source of accessory power supply is during directly from the output of rectifier bridge, auxiliary source has the function of power factor correction.When whole switch power supply system was the power supply of constant output voltage, Single-phase PFC converter and DC/DC converter used same output voltage sampling circuit, and this output voltage sampling circuit detects the voltage at load two ends; When whole switch power supply system is the power supply of constant output electric current; The Single-phase PFC converter uses different output current sample circuits with the DC/DC converter; Be in series with load again after the output current sample circuit series connection of two converters; The output current of Single-phase PFC converter flows through two output current sample circuits and load simultaneously, and the output current of DC/DC converter (DC-DC) only flows through self current sampling circuit and load.The topological structure of single-phase power factor correcting converter can adopt isolated form and non-isolation type PFC transformation topologies such as Boos t converter, Buck converter, Buck-Boost converter, full-bridge converter, anti exciting converter; The classical PFC control strategy (peak-current mode control, average-current mode control, voltage mode control) of single-phase power factor correcting converter using obtains the control signal of power factor correcting converter; The topological structure of DC/DC converter can adopt converters such as Buck converter, Boost converter; The DC/DC converter can adopt classical control modes such as peak-current mode control, voltage mode control to obtain the control signal of DC/DC converter, and the loop bandwidth of DC/DC converter is far above the bandwidth of Single-phase PFC converter.
Thus it is clear that, adopt above device can realize the above method of the present invention easily and reliably.
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention.
Fig. 2 is the electrical block diagram of the embodiment of the invention one.
Fig. 3 is the input current of the embodiment of the invention one and the simulation result figure of input voltage relation.
Fig. 4 is the output current wave of the embodiment of the invention one.
Fig. 5 is the electrical block diagram of the embodiment of the invention two.
Embodiment
Case study on implementation
Fig. 2 illustrates, and a kind of embodiment of the present invention does, a kind of topological structure of constant-current source Switching Power Supply and control method, and its concrete practice is:
Alternating current input power supplying is connected on the rectifier bridge of being made up of D1, D2, D3, D4 through the LC filter network of C1, C2, L1, L2; Rectifier bridge output VREC signal is as the input of anti exciting converter, and the transformer T1 of anti exciting converter has 4 winding N12, N34; N56 and N78, N12 are former limit windings; N34 is the auxiliary winding that power supply is provided to anti-excited power Power Factor Controller, and through D5, C4 generates vdd voltage and power supply is provided for anti-excited power Power Factor Controller; N56 is the main output winding of anti exciting converter, and the N56 winding is through D6, and C5 generates Vo+ and to load part energy is provided; N78 is another group output winding of anti exciting converter, and N78 generates accessory power supply VAUX through D7 and C7, and accessory power supply VAUX provides energy for back level small-power DC/DC Buck converter.DC/DC Buck converter is made up of Q2, D8, L3, C6 and Buck converter controller, and DC/DC Buck converter changes accessory power supply VAUX into Vo, to load another part energy is provided.The R3 electric current that anti-excited power factor correction converter provides to load of sampling; Be converted into the VFB-F voltage signal; Anti-excited power factor correction converter controller is compared as feedback signal VFB-F with the inner reference signal of controller, control methods such as peak current control that utilization is classical or voltage mode control, and the control anti exciting converter is operated in discontinuous mode or critical flow Discontinuous Conduction mode; The bandwidth of loop is controlled in the 20Hz, realizes power factor emendation function with this.The electric current of R2 sample streams overload; Be converted into the VFB signal, comprise that Buck converter and anti exciting converter offer the electric current of load, the Buck converter compares with the feedback signal and the inner reference signal of Buck controller of VFB signal as control; Control methods such as peak current control that utilization is classical or voltage mode control; The bandwidth of loop improves the response speed of whole constant-current source Switching Power Supply much larger than the frequency of power frequency with this, eliminates the power current ripple that flows through load.
Fig. 3 and Fig. 4 are the simulation waveforms that utilizes the SIMetrix/SIMPLIS simulation software to obtain.Can see that from Fig. 3 input current well followed the tracks of the waveform of input voltage, this power supply has very high power factor.The current average that as can beappreciated from fig. 4 flows through load is controlled at 1A accurately, and current ripples is 3.9mA.
Fig. 5 illustrates, and a kind of embodiment of the present invention does, a kind of topological structure of constant-current source Switching Power Supply and control method, and its concrete practice is:
Alternating current input power supplying is connected on the rectifier bridge of being made up of D1, D2, D3, D4 through the LC filter network of C1, C2, L1, L2; Rectifier bridge output VREC signal is as the input of anti exciting converter; Transformer T1 has 3 winding N12, N34 and N56, and the N12 winding uses as the inductance of Buck-Boost; N12 is through D6, and C4 generates Vo+ and to load part energy is provided; N34 is through D5, and C7 generates accessory power supply VAUX, and accessory power supply VAUX provides energy for back level small-power DC/DC Boost converter; N56 is through D8, and C6 generates vdd voltage and power supply is provided for the Buck-Boost power factor controller.DC/DC Boost converter is by L3, Q2, and D7 and Boost converter controller are formed, and DC/DC Boost converter changes accessory power supply VAUX into Vo, to load another part energy is provided.The electric current that R3 sampling Buck-Boost power factor correcting converter provides to load; Through the unscented transformation circuit; Be converted into the VFB-Main voltage signal; Buck-Boost power factor correcting converter controller is compared as feedback signal VFB-Main with the inner reference signal of controller, control methods such as peak current control that utilization is classical or voltage mode control, and control Buck-Boost converter is operated in discontinuous mode or critical flow Discontinuous Conduction mode; The bandwidth of loop is controlled in the 20Hz, realizes power factor emendation function with this.The electric current of R2 sample streams overload; Be converted into the VFB_Aux signal; Comprise that Boost converter and Buck-Boost converter offer the electric current of load; The Boost converter compares with the feedback signal and the inner reference signal of Boost controller of VFB_Aux signal as control, control methods such as peak current control that utilization is classical or voltage mode control, and the bandwidth of loop is much larger than the frequency of power frequency; Improve the response speed of whole constant-current source Switching Power Supply with this, eliminate the power current ripple that flows through load.

Claims (6)

1. the parallelly connected power factor correction conversion control method of an output ripple and low is characterized in that:
The output of the output of Single-phase PFC converter (TD) and DC/DC converter (DC-DC) is in parallel, and to load energy is provided simultaneously; Formations " Vo+ " that is connected with the anode of DC/DC converter output of the anode of Single-phase PFC converter output is held, and " Vo+ " holds the anode that is connected on load simultaneously; Formations " Vo-" that is connected with the negative terminal of DC/DC converter output of the negative terminal of Single-phase PFC converter output is held, and " Vo-" holds the negative terminal that is connected on load simultaneously; The input power supply of DC/DC converter is an accessory power supply; The input source of accessory power supply can directly come the output of rectification circuit (REC), also can be produced by Single-phase PFC converter (TD).
2. the parallelly connected power factor correction conversion control method of output ripple and low as claimed in claim 1; It is characterized in that; The control method of Single-phase PFC converter (TD) adopts classical PFC control mode, as: peak-current mode control, average-current mode control, voltage mode control, monocycle control.
3. the parallelly connected power factor correction conversion control method of output ripple and low as claimed in claim 1 is characterized in that, the control method of DC/DC converter (DC-DC) adopts classical control mode, as: peak-current mode control, voltage mode control; The loop bandwidth of DC/DC converter is far above the bandwidth of Single-phase PFC converter (TD).
4. realize the control device of claim 1 or 2 or 3 said control methods, it is characterized in that, form by Single-phase PFC converter, DC/DC converter (DC-DC), rectification circuit (REC) and accessory power supply (AP); Formations " Vo+ " that is connected with the anode of DC/DC converter (DC-DC) output of the anode of Single-phase PFC converter (TD) output is held, and " Vo+ " holds the anode that is connected on load (LD) simultaneously; Formations " Vo-" that is connected with the negative terminal of DC/DC converter (DC-DC) output of the negative terminal of Single-phase PFC converter (TD) output is held, and " Vo-" holds the negative terminal that is connected on load (LD) simultaneously.
5. the parallelly connected power factor correction conversion control apparatus of output ripple and low as claimed in claim 4; It is characterized in that the topological structure of Single-phase PFC converter (TD) can adopt isolated form and non-isolation type PFC transformation topologies such as Boo s t converter, Buck converter, Buck-Boost converter, full-bridge converter, anti exciting converter.
6. the parallelly connected power factor correction conversion control apparatus of output ripple and low as claimed in claim 4 is characterized in that, the topological structure of DC/DC converter (DC-DC) can adopt Buck converter, Boost converter.
CN2012100071972A 2012-01-11 2012-01-11 Low output ripple wave parallel power-factor correction (PFC) transform control method and device Pending CN102427293A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710152A (en) * 2012-06-06 2012-10-03 矽力杰半导体技术(杭州)有限公司 High-efficiency quick-response alternating current-direct current voltage conversion circuit
CN103780093A (en) * 2012-10-19 2014-05-07 光宝科技股份有限公司 Switching-type power supply unit
CN105471238A (en) * 2015-12-23 2016-04-06 厦门科华恒盛股份有限公司 Direct current bus voltage ripple compensating method and photovoltaic inverter
CN106026714A (en) * 2016-07-29 2016-10-12 合肥工业大学 Single-stage bipolar gain isolated type convertor
CN106787671A (en) * 2016-11-22 2017-05-31 张欣 Suppress the circuit of power factor correction of the no electrolytic capacitor of function and fast dynamic response speed with secondary ripple wave
CN108377097A (en) * 2018-02-14 2018-08-07 南京舒尔斯科技有限公司 A kind of auxiliary power supply circuit of power amplifier
CN109660132A (en) * 2019-01-29 2019-04-19 西南交通大学 A kind of device of inhibition bis- times of working frequency ripple waves of PFC of voltage-type COT control

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CN101834539A (en) * 2010-05-27 2010-09-15 浙江大学 High-efficiency AC/DC combined converter with wide output voltage range

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102710152A (en) * 2012-06-06 2012-10-03 矽力杰半导体技术(杭州)有限公司 High-efficiency quick-response alternating current-direct current voltage conversion circuit
US8767415B2 (en) 2012-06-06 2014-07-01 Silergy Semiconductor Technology (Hangzhou) Ltd. High efficiency and fast response AC-DC voltage converters
CN102710152B (en) * 2012-06-06 2015-12-02 矽力杰半导体技术(杭州)有限公司 The AC-DC voltage conversion circuit of a kind of high efficiency, response fast
CN103780093A (en) * 2012-10-19 2014-05-07 光宝科技股份有限公司 Switching-type power supply unit
CN103780093B (en) * 2012-10-19 2017-01-11 光宝电子(广州)有限公司 Switching-type power supply unit
CN105471238A (en) * 2015-12-23 2016-04-06 厦门科华恒盛股份有限公司 Direct current bus voltage ripple compensating method and photovoltaic inverter
CN105471238B (en) * 2015-12-23 2018-04-24 厦门科华恒盛股份有限公司 A kind of DC bus-bar voltage ripple compensation method and photovoltaic DC-to-AC converter
CN106026714A (en) * 2016-07-29 2016-10-12 合肥工业大学 Single-stage bipolar gain isolated type convertor
CN106787671A (en) * 2016-11-22 2017-05-31 张欣 Suppress the circuit of power factor correction of the no electrolytic capacitor of function and fast dynamic response speed with secondary ripple wave
CN106787671B (en) * 2016-11-22 2019-09-10 张欣 The circuit of power factor correction for having the function of the no electrolytic capacitor of secondary ripple wave inhibition and fast dynamic response speed
CN108377097A (en) * 2018-02-14 2018-08-07 南京舒尔斯科技有限公司 A kind of auxiliary power supply circuit of power amplifier
CN109660132A (en) * 2019-01-29 2019-04-19 西南交通大学 A kind of device of inhibition bis- times of working frequency ripple waves of PFC of voltage-type COT control

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