CN204578355U - A kind of quadratic form Buck power factor correcting converter - Google Patents

A kind of quadratic form Buck power factor correcting converter Download PDF

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Publication number
CN204578355U
CN204578355U CN201520164148.9U CN201520164148U CN204578355U CN 204578355 U CN204578355 U CN 204578355U CN 201520164148 U CN201520164148 U CN 201520164148U CN 204578355 U CN204578355 U CN 204578355U
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China
Prior art keywords
diode
inductance
anode
power factor
negative
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Expired - Fee Related
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CN201520164148.9U
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Chinese (zh)
Inventor
许建平
阎铁生
刘雪山
周国华
何圣仲
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Southwest Jiaotong University
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Southwest Jiaotong University
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Priority to CN201420379237 priority Critical
Priority to CN2014203792370 priority
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Priority to CN201520164148.9U priority patent/CN204578355U/en
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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

Abstract

The utility model discloses a kind of quadratic form Buck power factor correcting converter.AC power V aCthrough rectifier bridge D 1rectification, the output voltage of rectifier bridge is connected with LC filter, the positive terminating diode D of LC filter 2negative electrode and inductance L 1one end, the negative terminating diode D of LC filter 3anode and switching tube Q 1source class, diode D 3negative electrode and diode D 2anode, diode D 4anode and electric capacity C 1negative pole be connected, inductance L 1another termination capacitor C 1positive pole, diode D 5negative electrode and inductance L 2one end, diode D 4negative electrode meet switching tube Q 1leakage level, diode D 5anode, output capacitance C 2negative pole and output loading R lnegative terminal, inductance L 2another termination output capacitance C 2positive pole and output loading R lanode.The utility model only needs employing controller and a switching tube just can realize power factor emendation function and quick adjustment output voltage (electric current) simultaneously.

Description

A kind of quadratic form Buck power factor correcting converter
Technical field
The utility model relates to electric control appliance, especially a kind of quadratic form Buck power factor correcting converter and device thereof.
Background technology
In recent years, power electronic technology develops rapidly, and the power technology as field of power electronics important component part becomes the focus of application and research gradually.Switching Power Supply is high with its efficiency, power density is high and establish its dominant position in field of power supplies, but it can exist a fatal weakness by during rectifier access electrical network: power factor lower (being generally only 0.45 ~ 0.75), and a large amount of current harmonicss and reactive power can be produced and pollute electrical network in electrical network.It is passive means that the method suppressing Switching Power Supply to produce harmonic wave mainly contains two kinds: one, namely adopts passive filtering or active filter circuit to come bypass or harmonic carcellation; Two is active methods, namely designs high-performance rectifier of new generation, and it has, and input current is sine wave, harmonic content is low and power factor high, namely has power factor emendation function.Switch power supply power factor corrects the emphasis of research, the mainly research of circuit of power factor correction topology and the exploitation of Power Factor Correction Control integrated circuit.Output voltage (electric current) ripple of traditional single-level power factor correction converter is large, dynamic responding speed is slow, therefore as shown in Figure 1, in the system of conventional belt power factor correction function, the structure of usual employing 2 stage converter cascade, first order converter realizes power factor emendation function, second level converter realizes quick adjustment output voltage (electric current), and every one-level converter independently controls, therefore traditional with in the system of power factor emendation function at least containing two controllers and two switching tubes, control complicated and cost is high.
Utility model content
The purpose of this utility model is to provide a kind of quadratic form Buck power factor correcting converter device, make it only to use a controller and a switching tube, realize power factor correction, quick adjustment output voltage (electric current) and low output voltage (electric current) ripple simultaneously, do not use transformer just can realize high step-down ratio.
The utility model realizes its utility model object, the technical scheme adopted be for:
A kind of quadratic form Buck power factor correcting converter, comprises AC power V aC, rectifier bridge D 1, LC filter, diode D 2, diode D 3, diode D 4, diode D 5, inductance L 1, electric capacity C 1, inductance L 2, electric capacity C 1, switching tube Q 1, electric capacity C 2, and load R l, it is characterized in that, AC power V aCthrough rectifier bridge D 1rectification, the output voltage of rectifier bridge is connected with LC filter, the positive terminating diode D of LC filter 2negative electrode and inductance L 1one end, the negative terminating diode D of LC filter 3anode and switching tube Q 1source class, diode D 3negative electrode and diode D 2anode, diode D 4anode and electric capacity C 1negative pole be connected, inductance L 1another termination capacitor C 1positive pole, diode D 5negative electrode and inductance L 2one end, diode D 4negative electrode meet switching tube Q 1leakage level, diode D 5anode, output capacitance C 2negative pole and output loading R lnegative terminal, inductance L 2another termination output capacitance C 2positive pole and output loading R lanode.
Compared with prior art, the beneficial effects of the utility model are:
1, relative to the converter of traditional two-stage cascade power factor correction function, adopt quadratic form Buck power factor correcting converter of the present utility model, only use a switching tube and a controller, reduce the quantity of switching tube and controller, reduce the cost of whole system, reduce the design difficulty of whole system, improve power density; 2, relative to traditional single-level power factor correction converter, adopt quadratic form Buck power factor correcting converter of the present utility model, while realizing power factor emendation function, also achieve the function of quick adjustment output voltage (electric current) and low output voltage (electric current) ripple.
Accompanying drawing explanation
Fig. 1 is traditional two-stage cascade power factor correcting converter system architecture diagram.
Fig. 2 is quadratic form Buck power factor correction converter circuit figure.
Fig. 3 is the utility model embodiment one circuit block diagram.
Fig. 4 is the experimental waveform figure of embodiment one.Test condition: input voltage is 110V/60Hz, exports the constant-current source into 350mA, and output loading is the forward voltage of LED, LED is 20V.
Fig. 5 is the electrical block diagram of the utility model embodiment two.
Embodiment
Below by concrete example with reference, further detailed description is done to the utility model.
Embodiment one
Fig. 3 is the structured flowchart of the utility model embodiment one, and Fig. 4 is the experimental waveform of circuit shown in Fig. 3.Fig. 3 illustrates, example one embodiment of the present utility model is, a kind of quadratic form Buck power factor correcting converter of constant current output, and its concrete practice is:
AC power V aCthrough rectifier bridge D 1rectification, the output voltage of rectifier bridge is connected with LC filter, the positive terminating diode D of LC filter 2negative electrode and inductance L 1one end, the negative terminating diode D of LC filter 3anode and switching tube Q 1source class, diode D 3negative electrode and diode D 2anode, diode D 4anode and electric capacity C 1negative pole be connected, inductance L 1another termination capacitor C 1positive pole, diode D 5negative electrode and inductance L 2one end, diode D 4negative electrode meet switching tube Q 1leakage level, diode D 5anode, output capacitance C 2negative pole and output current sampling resistor R sone end, inductance L 2another termination output capacitance C 2positive pole and the anode of output constant current source load, the negative terminal of output constant current source load meets output current sampling resistor R sthe other end.Operational amplifier is the voltage of output current sampling resistor compared with reference voltage, and the error signal that operational amplifier exports is delivered to the negative terminal of comparator by optocoupler, and comparator and rest-set flip-flop are according to error signal and sawtooth waveforms by-pass cock pipe Q 1duty ratio, thus stabilizing output current.
Fig. 4 is the experimental waveform of circuit shown in Fig. 3, and the input voltage of experimental circuit is for exchanging 110V, and the frequency exchanging input is 60Hz, and the rated voltage of output loading is 20V, and output current is 350mA.As can be seen from Fig. 4 waveform:
Outputting current steadily is at 350mA, and output current ripple is little, and output current does not have two times of working frequency ripple wave compositions, can find out converter experiment power factor emendation function from input current.
Embodiment two
Fig. 5 is the structured flowchart of the utility model embodiment two, and Fig. 5 illustrates that example two embodiment of the present utility model is, the quadratic form Buck power factor correcting converter that a kind of constant voltage exports, and its concrete practice is: AC power V aCthrough rectifier bridge D 1rectification, the output voltage of rectifier bridge is connected with LC filter, the positive terminating diode D of LC filter 2negative electrode and inductance L 1one end, the negative terminating diode D of LC filter 3anode and switching tube Q 1source class, diode D 3negative electrode and diode D 2anode, diode D 4anode and electric capacity C 1negative pole be connected, inductance L 1another termination capacitor C 1positive pole, diode D 5negative electrode, output loading R lanode and output capacitance C 2positive pole, diode D 4negative electrode meet switching tube Q 1leakage level, diode D 5anode, inductance L 2one end, inductance L 2another termination output capacitance C 2negative pole and output loading R lnegative terminal, output voltage sampling resistor R 1one end connect output loading R lanode, output voltage sampling resistor R 1the other end connect output voltage sampling resistor R 2one end and the negative terminal of operational amplifier, output voltage sampling resistor R 2the other end connect output loading R lnegative terminal.Operational amplifier is operational amplifier negative terminal voltage compared with the reference voltage of anode, and the error signal that operational amplifier exports is delivered to the negative terminal of comparator by optocoupler, and comparator and rest-set flip-flop are according to error signal and sawtooth waveforms by-pass cock pipe Q 1duty ratio, thus regulated output voltage.

Claims (4)

1. a quadratic form Buck power factor correcting converter, comprises AC power V aC, rectifier bridge D 1, LC filter, diode D 2, diode D 3, diode D 4, diode D 5, inductance L 1, electric capacity C 1, inductance L 2, electric capacity C 1, switching tube Q 1, electric capacity C 2, and load R l, it is characterized in that, AC power V aCthrough rectifier bridge D 1rectification, the output voltage of rectifier bridge is connected with LC filter, the positive terminating diode D of LC filter 2negative electrode and inductance L 1one end, the negative terminating diode D of LC filter 3anode and switching tube Q 1source class, diode D 3negative electrode and diode D 2anode, diode D 4anode and electric capacity C 1negative pole be connected, inductance L 1another termination capacitor C 1positive pole, diode D 5negative electrode and inductance L 2one end, diode D 4negative electrode meet switching tube Q 1leakage level, diode D 5anode, output capacitance C 2negative pole and output loading R lnegative terminal, inductance L 2another termination output capacitance C 2positive pole and output loading R lanode.
2. quadratic form Buck power factor correcting converter according to claim 1, is characterized in that, switching tube Q 1for Mosfet, triode or IGBT.
3. quadratic form Buck power factor correcting converter according to claim 1, is characterized in that, output loading R lfor: resistance, LED, battery or Circuits System load.
4. quadratic form Buck power factor correcting converter according to claim 1, is characterized in that, inductance L 1be operated in discontinuous mode, inductance L 2be operated in discontinuous mode, critical continuous conduction mode or continuous mode.
CN201520164148.9U 2014-07-10 2015-03-23 A kind of quadratic form Buck power factor correcting converter Expired - Fee Related CN204578355U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201420379237 2014-07-10
CN2014203792370 2014-07-10
CN201520164148.9U CN204578355U (en) 2014-07-10 2015-03-23 A kind of quadratic form Buck power factor correcting converter

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Application Number Priority Date Filing Date Title
CN201520164148.9U CN204578355U (en) 2014-07-10 2015-03-23 A kind of quadratic form Buck power factor correcting converter

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CN204578355U true CN204578355U (en) 2015-08-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105554952A (en) * 2016-01-22 2016-05-04 江苏大学 Interleaving LED drive circuit based on quadratic form Buck and working method thereof
CN108770117A (en) * 2018-05-10 2018-11-06 四川大学 A kind of integrated LED drive power of compatible electronic transformer
CN108809090A (en) * 2018-06-19 2018-11-13 四川大学 A kind of High Power Factor multichannel low ripple constant current output switch converters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105554952A (en) * 2016-01-22 2016-05-04 江苏大学 Interleaving LED drive circuit based on quadratic form Buck and working method thereof
CN105554952B (en) * 2016-01-22 2018-02-27 江苏大学 A kind of crisscross parallel LED drive circuit and its method of work based on quadratic form Buck
CN108770117A (en) * 2018-05-10 2018-11-06 四川大学 A kind of integrated LED drive power of compatible electronic transformer
CN108809090A (en) * 2018-06-19 2018-11-13 四川大学 A kind of High Power Factor multichannel low ripple constant current output switch converters

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150819

Termination date: 20180323

CF01 Termination of patent right due to non-payment of annual fee