CN101944844A - High power factor power correcting circuit - Google Patents

High power factor power correcting circuit Download PDF

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CN101944844A
CN101944844A CN2009102246448A CN200910224644A CN101944844A CN 101944844 A CN101944844 A CN 101944844A CN 2009102246448 A CN2009102246448 A CN 2009102246448A CN 200910224644 A CN200910224644 A CN 200910224644A CN 101944844 A CN101944844 A CN 101944844A
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diode
capacitor
transformer
primary coil
group
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林福泳
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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 provides a high power factor power correcting circuit, which consists of a rectifying circuit, an electric energy converting circuit and a power factor correcting circuit. In the invention, a transformer can charge a storage capacitor via a group of primary coils of the transformer when a switching tube is cutoff, and the characteristic of limited energy storage of a small capacitor can help limit charging quantity on the storage capacitor from an external circuit so that residual energy on the transformer can be fully released to the storage capacitor when the transformer is switched off, thus avoiding saturation of the transformer.

Description

A kind of high power factor direct current power supply correcting circuit
Technical field
The present invention relates to the high power factor correction power circuit.
Background technology
In electrical network, there is great influence in various loads especially nonlinear load for mains supply.For example the power supply of many electrical equipment need be converted to direct current with the alternating current of electrical network, and the pulsating current that produces in switching process comprises a large amount of current harmonics components.These harmonic components blow back into electrical network, can cause the harmonic wave " pollution " to electrical network, cause the harmonic wave pressure drop when electric current flows through line impedance, and sinusoidal wave electrical network is distorted.
At present, China executes " CCC authentication " for household electrical appliances (the CCC authentication is " China Compulsory Certification ", reach the requirement of this standard, and each household electrical appliances must carry out capability correction.By research in recent years, the circuit of existing multiple raising power factor.Mainly improve from following two aspects:
1. Passive Power is proofreaied and correct (PFC) circuit
Passive PFC is by inductance, and elements such as electric capacity, diode compensation exchanges the fundamental current of input and the phase difference of voltage, forces electric current consistent with the phase place of voltage, can reduce power supply to the Harmonic Interference of electrical network and the electrical network Harmonic Interference to power supply.This circuit of power factor correction can be brought up to 0.7-0.8 with power factor, and current harmonic content drops to below 40%, and this circuit is widely used in middle low capacity equipment.Its characteristics mainly are that circuit is simple, and cost is low, the reliability height, easy to maintenance, EM is little etc., shortcoming is that the circuit volume is big and heavy, and power factor is not high.
2. APFC
It initiatively is power that this mode can be called, the factor correcting mode, sort circuit inserts a DC/DC switch converters between rectifier and load, applied current is put the feedback technology, by PFC special logic chip controls, the input current waveform was followed the tracks of in the whole electricity cycle exchanged input sinusoidal voltage waveform, this APFC, can make input current near sinusoidal, thereby make the total harmonic distortion amount of input (THD) less than 5%, power factor can bring up to 0.99% even higher, the problem of sort circuit is this circuit of power factor correction owing to increased the one-level circuit, increased circuit loss, grade switching tube device voltage parameter raising after while makes owing to the raising level has improved voltage, thus cost improved.
Summary of the invention:
At the defective of above-mentioned various circuit, the technology that the present invention solves is, provides a kind of cost low, power-efficient height, the simple capability correction power circuit of good reliability.
Main thought of the present invention is to utilize one group of primary coil of transformer to make transformer charge to storage capacitor when switching tube ends, and limited this characteristic of the energy storage that utilizes a little electric capacity, the restriction external circuit is to the charge volume of storage capacitor charging, make transformer when turn-offing, complementary energy on the transformer discharges completely to storage capacitor, thereby realizes the saturated of an anti-just transformer.
First kind of circuit of the present invention is made up of rectification circuit, electric energy change-over circuit, circuit of power factor correction for being suitable for the half-bridge power circuit.
Rectification circuit: by rectifier bridge, capacitor C 1Form, concrete connection is that rectifier bridge BR1 input connects AC power, capacitor C 1Be attempted by the output of rectifier bridge.
Electric energy change-over circuit: by switching tube Q 1, Q 2, transformer T primary coil T 11, transformer T secondary coil T 22, capacitor C 3, C 4, C 5Form.Switching tube Q wherein 2Drain electrode meet storage capacitor C 4Positive pole, switching tube Q 2Source electrode meet switching tube Q 1Drain electrode, the primary coil T of transformer T 11An end, the primary coil T of transformer T 11Another termination capacitor C 3An end, capacitor C 3Another termination storage capacitor C 4Negative pole, storage capacitor C 5Positive pole, storage capacitor C 5Negative pole meet switching tube Q 1Source electrode, be connected to rectifier bridge BR! Negative pole end, secondary coil connects secondary circuit.
Circuit of power factor correction: by diode D 1, D 2, D 3, D 4, capacitor C 2, transformer T primary coil T 12Form concrete connection diode D 1, D 3Anode be connected to the output cathode end of rectifier bridge, diode D 1Negative electrode meet diode D 2Anode, capacitor C 2An end, capacitor C 2The primary coil T of another termination transformer T 12An end, the primary coil T of transformer T 12Another terminating diode D 3Negative electrode, diode D 4Anode, diode D 2, D 4Negative electrode be connected to capacitor C 4Positive pole.
Second kind of circuit of the present invention is for being suitable for the single-stage power supply circuit, by rectification circuit, electric energy change-over circuit, circuit of power factor correction.Rectification circuit: by rectifier bridge, capacitor C 41Form, concrete connection is that the rectification input connects AC power, capacitor C 41Be attempted by the output of rectifier bridge.
Electric energy change-over circuit: by switching tube Q 41, Q 42, transformer T 4Primary coil T 411, transformer T 4Secondary coil T 422Form.Switching tube Q wherein 41Drain electrode meet storage capacitor C 42Positive pole, switching tube Q 41Source electrode meet transformer T 4Primary coil T 411An end, the primary coil T of transformer T 411Another termination switching tube Q 42Drain electrode, switching tube Q 42Source electrode meet storage capacitor C 42Negative pole be connected to the negative pole end of rectifier bridge output, secondary coil T 422Connect secondary circuit.
Circuit of power factor correction: by diode D 41, D 42, D 43, D 44, D 45, energy storage holds C 42, capacitor C 43, transformer T 4Primary coil T 412, transformer primary coil T 411Form concrete connection diode D 41, D 42Anode be connected to the positive terminal of rectifier bridge output, diode D 42Negative electrode meet diode D 43Anode, capacitor C 43An end, capacitor C 43Another terminating diode D 44Anode, D 45Negative electrode, diode D 44Negative electrode meet transformer T 4Primary coil T 412An end, the primary coil T of transformer T 412Another terminating diode D 43Negative electrode, capacitor C 42Positive pole, the D of diode 41Negative electrode meet transformer T 4Primary coil T 411An end, switching tube Q 41Source electrode, transformer T 4Primary coil T 411Another terminating diode D 45Anode, switching tube Q 42Drain electrode, capacitor C 42Negative pole connect the negative pole of rectifier bridge output, the primary coil T of transformer 411Meet diode D 45Anode tap and transformer T 412Meet diode D 44Cathode terminal be end of the same name.
The third circuit of the present invention is made up of rectification circuit, electric energy change-over circuit, circuit of power factor correction for being suitable for the single tube power circuit.
Rectification circuit: be made up of rectifier bridge, electric capacity, concrete connection is that the rectification input connects AC power, capacitor C 31Be attempted by the output of rectifier bridge.
Electric energy change-over circuit: by switching tube Q 31, storage capacitor C 33, transformer T 3Primary coil T 311, transformer T 3Secondary coil T 322Form.Storage capacitor C wherein 33The anodal utmost point meet transformer T 3Primary coil T 311An end, transformer T 3Primary coil T 311Another termination switching tube Q 31Drain electrode, switching tube Q 31Source electrode meet storage capacitor C 33Negative pole be connected to the negative pole of rectifier bridge output, secondary coil T 422Connect secondary circuit.
Circuit of power factor correction: by diode D 31, D 32, D 33, capacitor C 32, C 33, transformer T primary coil T 312, inductance L 31, switching tube Q 32Form concrete connection diode D 31Anode and switching tube Q 32Drain electrode link to each other and to be attempted by the positive pole of rectifier bridge output, diode D 31Negative electrode meet storage capacitor C 33Positive terminal, storage capacitor C 33The negative pole end of negative pole termination rectifier bridge, switching tube Q 32Source electrode connect inductance L 31An end, inductance L 31Another termination capacitor C 32An end, diode D 32Anode, diode D 32Negative electrode meet diode D 33Negative electrode, transformer T 3Primary coil T 312An end, diode D 33Anode, capacitor C 32Another termination storage capacitor C 33Negative pole link to each other transformer T 3Primary coil T 312Another termination storage capacitor C 33The primary coil T of positive pole, transformer T 311An end.
Description of drawings
Fig. 1 is a kind of semibridge system power supply of the present invention high-power factor correcting circuit figure.
Fig. 2 is the application of a kind of semibridge system power supply of the present invention high-power factor correcting circuit in electric ballast.
Fig. 3 is a kind of single-stage power supply high-power factor correcting circuit of the present invention figure.
Fig. 4 is the another kind of single-stage power supply high-power factor correcting circuit of the present invention figure.
The present invention specifies
Semibridge system power supply high-power factor correcting circuit
In Fig. 1, the input of rectifier bridge BR1 connects AC power, exports and connect capacitor C 1The rectifier bridge output cathode meets diode D 1, D 3Anode, diode D 1Negative electrode meet diode D 2Anode, capacitor C 2An end, capacitor C 2The primary coil T of another termination transformer T 12An end; The primary coil T of transformer T 12Another terminating diode D 3Negative electrode, diode D 4Anode; Diode D 2, D 4Negative electrode link to each other, and meet switching tube Q 2Drain electrode, capacitor C 4Positive pole; Switching tube Q 2Source electrode meet switching tube Q 1Drain electrode, the primary coil T of transformer T 11An end, the primary coil T of transformer T 11Another termination capacitor C 3An end, capacitor C 3Another termination capacitor C 4Negative pole, capacitor C 5Positive pole, capacitor C 5Negative pole meet switching tube Q 1The negative pole of source electrode, rectifier bridge BR1 output; Secondary coil connects secondary circuit.Primary coil T 12Connect capacitor C 2That end and primary coil T 11Meet switching tube Q 2Source electrode, switching tube Q 1That end of drain electrode be end of the same name.Capacitor C in this circuit 2Primary coil T with transformer T 12The position can exchange capacitor C 3Primary coil T with transformer T 11The position can exchange.
The operation principle of first kind of circuit of the present invention is as follows:
Work as Q 1Q is worked as in conducting 2When ending, electric current is by the primary coil T of transformer T 11, capacitor C 3, converting electrical energy into secondary electric energy, coil is because T simultaneously 12Existence, input voltage adds coil T 12On voltage make electric current pass through D 1, T 12, C 2, D 4Give capacitor C 4, C 5Charging, this charging process (capacitor C that is through with soon 2Play the restriction charging process).Work as Q 1End, work as Q 2When ending, because transformer has energy, C 1Last voltage adds transformer T 12On voltage, make electric current pass through D 3, T 12, C 2, D 2Give capacitor C 4, C 5Charging.
The same Q that works as 2Conducting, work as Q 1When ending, electric current is by transformer T 11, capacitor C 3, converting electrical energy into secondary electric energy, coil is because T simultaneously 12Existence, input voltage adds coil T 12On voltage make electric current pass through D 3, T 12, C 2, D 2Give capacitor C 4, C 5Charging, this charging process (capacitor C that is through with soon 2Play the restriction charging process).Work as Q 2End, work as Q 1When ending, because transformer has energy, C 1Last voltage adds transformer T 12On voltage, make electric current pass through D 1, T 12, C 2, D 4Give capacitor C 4, C 5Charging.Repeat the purpose that said process just can reach power factor correction, and when switching tube ended, power consumption be converted to available electric energy.This circuit also can be used on the high-frequency electronic ballast.
Semibridge system power supply electronic ballast circuit with high power factor
In Fig. 2, the secondary coil of the transformer in the semibridge system power supply high power factor circuit is removed, loading (lamp) in the middle of the junction of first group of primary coil of transformer and first switching tube, second switch pipe, or loading (lamp) in the middle of first group of primary coil and the 3rd electric capacity, or the negative pole of the 3rd electric capacity and the 4th electric capacity, loading (lamp) in the middle of the 5th capacitance cathode.Operation principle with
A kind of single-stage power supply high-power factor correcting circuit semibridge system power supply high-power factor correcting circuit is similar.
In Fig. 4, the input of rectifier bridge BR4 connects AC power, exports and connect capacitor C 41The output cathode end of rectifier bridge BR4 and diode D 41, D 42Anode link to each other; Diode D 42Negative electrode meet diode D 43Anode, capacitor C 43An end, capacitor C 43Another terminating diode D 44Anode, diode D 45Negative electrode; Diode D 44Negative electrode meet the primary coil T of transformer T 412An end, transformer T 4Primary coil T 412Another terminating diode D 43Negative electrode, capacitor C 42Positive pole, switching tube Q 41Drain electrode; Capacitor C 42Negative pole connect the negative pole of rectifier bridge output; Diode D 41Negative electrode meet switching tube Q 41Source electrode, transformer T 4Primary coil T 411An end, transformer T 4Primary coil T 411Another termination switching tube Q 42Drain electrode, diode D 45Anode, switching tube Q 42The source electrode utmost point connect the negative pole of rectifier bridge output, secondary coil T 422Connect secondary circuit.
The operation principle of single-stage power supply high-power factor correcting circuit is as follows:
Work as Q 41, Q 42When ending, because T 411Existence, input voltage, capacitor C 41On voltage add coil T 412On voltage make electric current pass through D 41, T 411, D 45, C 43, D 43Give capacitor C 42Charging, this charging process (capacitor C that is through with soon 43Play the restriction charging process).Work as Q 42During conducting, because transformer has energy, rectifier bridge BR4 input voltage, C 43On voltage add transformer T 412On voltage, make electric current pass through D 42, C 43, D 44, T 412Give capacitor C 42Charging.
Second kind of single-stage power supply high-power factor correcting circuit
In Fig. 3, the input of rectifier bridge BR3 connects AC power, exports and connect capacitor C 31Rectifier bridge BR3 output cathode meets diode D 31Positive pole, switching tube Q 32Drain electrode link to each other diode D 31Negative electrode meet storage capacitor C 33Positive terminal, storage capacitor C 33The negative pole end of negative pole termination rectifier bridge, switching tube Q 32Source electrode connect inductance L 31An end, inductance L 31Another termination capacitor C 32An end, diode D 32Positive pole, diode D 32Negative pole meet diode D 33Negative electrode, transformer T 3Primary coil T 312An end, diode D 33Anode and capacitor C 32Another termination storage capacitor C 33Negative pole end, transformer T 3Primary coil T 312Another termination storage capacitor C 33The primary coil T of positive pole, transformer T 311An end, the primary coil T of transformer T 311Another termination switching tube Q 31Drain electrode, switching tube Q 31Source electrode meet storage capacitor C 33Negative pole, the primary coil T of transformer T 311Primary coil T with transformer T 312The different name end link to each other secondary coil T 422Connect secondary circuit.
Second kind of single-stage power supply high-power factor correcting circuit operation principle is as follows:
As switching tube Q 31Conducting, switching tube Q 32During conducting, electric current is by the primary coil T of transformer 311Convert the electric energy of secondary wire to, simultaneously, the electric current of rectification bridge output end is by switching tube Q 32, inductance L 31Give capacitor C 32Charging is because the primary coil T of transformer 312Existence, stop the logical switching tube Q of electric current 32, inductance L 31, diode D 32, transformer primary coil T 312To storage capacitor C 33Charging; As switching tube Q 31End switching tube Q 32When ending, capacitor C 32On voltage and primary coil T 312On voltage make electric current pass through diode D 32, transformer primary coil T 312To storage capacitor C 33Charging is because capacitor C 32On electric energy limited, make energy storage on the transformer to discharge and give capacitor C 33

Claims (8)

1. a high power factor direct current power supply correcting circuit is made up of rectification circuit, circuit of power factor correction, electric energy change-over circuit; Rectification circuit: by rectifier bridge, first capacitor C 1Form, concrete connection is that rectifier bridge BR input connects AC power, capacitor C 1Be attempted by the output of rectifier bridge; Electric energy change-over circuit: by the first switching tube Q 1, second switch pipe Q 2, transformer T first group of primary coil T 11, transformer T secondary coil T 22, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th C 5Form, wherein second switch pipe Q 2Drain electrode connect the 4th capacitor C 4Positive pole, second switch pipe Q 2Source electrode meet the first switching tube Q 1Drain electrode, first group of primary coil T of transformer T 11An end, first group of primary coil T of transformer T 11Another termination the 3rd capacitor C 3An end, the 3rd capacitor C 3Another termination the 4th capacitor C 4Negative pole, the 5th capacitor C 5Positive pole, the 5th capacitor C 5Negative pole meet the first switching tube Q 1Source electrode, be connected to the negative pole end of rectifier bridge BR, secondary coil connects secondary circuit; Circuit of power factor correction: by the first diode D 1, the second diode D 2, the 3rd diode D 3The 4th diode D 4, second capacitor C 2, transformer T second group of primary coil T 12Form the concrete connection first diode D 1, the second diode D 3Anode be connected to the output cathode end of rectifier bridge, the first diode D 1Negative electrode meet the second diode D 2Anode, second capacitor C 2An end, second capacitor C 2Second group of primary coil T of another termination transformer T 12An end, second group of primary coil T of transformer T 12Another termination the 3rd diode D 3Negative electrode, the 4th diode D 4Anode, the second diode D 2, the 4th diode D 4Negative electrode be connected to the 4th capacitor C 4Positive pole.
2. high power factor direct current power supply correcting circuit according to claim 1, circuit of power factor correction: by the first diode D 1, the second diode D 2, the 3rd diode D 3The 4th diode D 4, second capacitor C 2, transformer T second group of primary coil T 12Form the concrete connection first diode D 1, the second diode D 3Anode be connected to the output cathode end of rectifier bridge, the first diode D 1Negative electrode meet the second diode D 2Anode, second capacitor C 2An end, second capacitor C 2Second group of primary coil T of another termination transformer T 12An end, second group of primary coil T of transformer T 12Another termination the 3rd diode D 3Negative electrode, the 4th diode D 4Anode, the second diode D 2, the 4th diode D 4Negative electrode be connected to the 4th capacitor C 4Positive pole; Second capacitor C wherein 2, transformer T second group of primary coil T 12The position can exchange second capacitor C 2Effect be the charge volume that the from outside power supply of restriction is given the 4th electric capacity, the charging of the 5th electric capacity, to guarantee to discharge fully the complementary energy on the transformer, according to the size of different power selection second electric capacity.
3. high power factor direct current power supply correcting circuit according to claim 1, be used for circuit of electronic ballast, the secondary coil of transformer is removed, loading (lamp) or loading (lamp) in the middle of first group of primary coil and the 3rd electric capacity behind first group of coil of transformer, or the negative pole of the 3rd electric capacity and the 4th electric capacity, loading (lamp) in the middle of the 5th capacitance cathode.
4. high power factor direct current power supply correcting circuit according to claim 1, first group of primary coil T in the electric energy change-over circuit 11With the 3rd capacitor C 3The position can exchange.
5. a high power factor direct current power supply correcting circuit is made up of rectification circuit, circuit of power factor correction, electric energy change-over circuit; Rectification circuit: by rectifier bridge BR4, first capacitor C 41Form, concrete connection is that rectifier bridge BR4 input connects AC power, capacitor C 41Be attempted by the output of rectifier bridge; Electric energy change-over circuit: by the first switching tube Q 41Second switch pipe Q 42, transformer T 4First group of primary coil T 411, transformer T 4Secondary coil T 422Form, wherein the first switching tube Q 41Drain electrode meet storage capacitor C 42Positive pole, the first switching tube Q 41Source electrode meet transformer T 4First group of primary coil T 411An end, first group of primary coil T of transformer T 411Another termination second switch pipe Q 42Drain electrode, second switch pipe Q 42Source electrode connect second capacitor C 42Negative pole be connected to the negative pole end of rectifier bridge output, secondary coil T 422Connect secondary circuit; Circuit of power factor correction: by the first diode D 41, the second diode D 42The 3rd diode D 43, the 4th diode D 44, the 5th diode D 45, second capacitor C 42, the 3rd capacitor C 43, transformer T 4Second group of primary coil T 412Form the concrete connection first diode D 41, the second diode D 42Anode be connected to the positive terminal of rectifier bridge BR4 output, the second diode D 42Negative electrode meet the 3rd diode D 43Anode, the 3rd capacitor C 43An end, the 3rd capacitor C 43Another termination the 4th diode D 44Anode, the 5th diode D 45Negative electrode, the 4th diode D 44Negative electrode meet transformer T 4Second group of primary coil T 412An end, second group of primary coil T of transformer T 412Another termination the 3rd diode D 43Negative electrode, second capacitor C 42Positive pole, the D of first diode 41Negative electrode meet transformer T 4First group of primary coil T 411An end, the first switching tube Q 41Source electrode, transformer T 4First group of primary coil T 411Another termination the 5th diode D 45Anode, second switch pipe Q 42Drain electrode, second capacitor C 42Negative pole connect the negative pole of rectifier bridge output.
6. high power factor direct current power supply correcting circuit according to claim 5, circuit of power factor correction: by the first diode D 41, the second diode D 42The 3rd diode D 43, the 4th diode D 44, the 5th diode D 45, second capacitor C 42, the 3rd capacitor C 43, transformer T 4Second group of primary coil T 412Form the concrete connection first diode D 41, the second diode D 42Anode be connected to the positive terminal of rectifier bridge BR4 output, the second diode D 42Negative electrode meet the 3rd diode D 43Anode, the 3rd capacitor C 43An end, the 3rd capacitor C 43Another termination the 4th diode D 44Anode, the 5th diode D 45Negative electrode, the 4th diode D 44Negative electrode meet transformer T 4Second group of primary coil T 412An end, second group of primary coil T of transformer T 412Another termination the 3rd diode D 43Negative electrode, second capacitor C 42Positive pole, the D of first diode 41Negative electrode meet transformer T 4First group of primary coil T 411An end, transformer T 4First group of primary coil T 411A termination the 5th diode D 45Anode, second capacitor C 42Negative pole meet the negative pole of rectifier bridge output, wherein second group of primary coil T 412Meet the 4th diode cathode and second group of primary coil T 411That end that connects the 5th diode anode is an end of the same name, the 3rd capacitor C 43Effect be that the from outside power supply of restriction is given the charge volume of second electric capacity charging, to guarantee to discharge fully the complementary energy on the transformer, according to the size of different power selection the 3rd electric capacity.
7. a high power factor direct current power supply correcting circuit is made up of rectification circuit, circuit of power factor correction, electric energy change-over circuit; Rectification circuit: by rectifier bridge BR3, first capacitor C 31Form, concrete connection is that rectifier bridge BR3 input connects AC power, first capacitor C 31Be attempted by the output of rectifier bridge; Electric energy change-over circuit: by the first switching tube Q 31, the 3rd capacitor C 33, transformer T 3First group of primary coil T 311, transformer T 3Secondary coil T 322Form, wherein the 3rd capacitor C 33The anodal utmost point meet transformer T 3First group of primary coil T 311An end, transformer T 3First group of primary coil T 311Another termination first switching tube Q 31Drain electrode, the first switching tube Q 31Source electrode connect the 3rd capacitor C 33Negative pole be connected to the negative pole of rectifier bridge output, secondary coil T 422Connect secondary circuit; Circuit of power factor correction: by the first diode D 31, the second diode D 32, the 3rd diode D 33, second capacitor C 32, the 3rd capacitor C 33, transformer T second group of primary coil T 312, inductance L 31, second switch pipe Q 32Form the concrete connection first diode D 31Anode and second switch pipe Q 32Drain electrode link to each other and to be attempted by the positive pole of rectifier bridge output, the first diode D 31Negative electrode connect the 3rd capacitor C 33Positive terminal, the 3rd capacitor C 33The negative pole end of negative pole termination rectifier bridge, second switch pipe Q 32Source electrode connect inductance L 31An end, inductance L 31Another termination second capacitor C 32An end, the second diode D 32Anode, the second diode D 32Negative electrode meet the 3rd diode D 33Negative electrode, transformer T 3Second group of primary coil T 312An end, the 3rd diode D 33Anode, second capacitor C 32Another termination the 3rd capacitor C 33Negative pole link to each other transformer T 3Second group of primary coil T 312Another termination the 3rd capacitor C 33First group of primary coil T of positive pole, transformer T 311An end.
8. high power factor direct current power supply correcting circuit according to claim 6, circuit of power factor correction: by the first diode D 31, the second diode D 32, the 3rd diode D 33, second capacitor C 32, the 3rd capacitor C 33, transformer T second group of primary coil T 312, inductance L 31, second switch pipe Q 32Form the concrete connection first diode D 31Anode and second switch pipe Q 32Drain electrode link to each other and to be attempted by the positive pole of rectifier bridge output, the first diode D 31Negative electrode connect the 3rd capacitor C 33Positive terminal, the 3rd capacitor C 33The negative pole end of negative pole termination rectifier bridge, second switch pipe Q 32Source electrode connect inductance L 31An end, inductance L 31Another termination second capacitor C 32An end, the second diode D 32Anode, the second diode D 32Negative electrode meet the 3rd diode D 33Negative electrode, transformer T 3Second group of primary coil T 312An end, the 3rd diode D 33Anode, second capacitor C 32Another termination the 3rd capacitor C 33Negative pole link to each other transformer T 3Second group of primary coil T 312Another termination the 3rd capacitor C 33, transformer T first group of primary coil T 311An end, second capacitor C 32Be used for limiting external circuit to the 3rd capacitor C 33Charging current, make that the complementary energy of transformer is discharged fully, according to the size of different power selection second electric capacity, first group of primary coil of transformer connects that end of second group of primary coil and that end that second group of primary coil connects second diode cathode is an end of the same name.
CN2009102246448A 2009-11-16 2009-11-16 High power factor power correcting circuit Pending CN101944844A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI499351B (en) * 2014-01-22 2015-09-01
CN106374736A (en) * 2016-11-22 2017-02-01 郑州搜趣信息技术有限公司 Sine wave voltage PFC circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI499351B (en) * 2014-01-22 2015-09-01
CN106374736A (en) * 2016-11-22 2017-02-01 郑州搜趣信息技术有限公司 Sine wave voltage PFC circuit

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Application publication date: 20110112