CN201430462Y - High-efficiency high-power-factor charger circuit - Google Patents
High-efficiency high-power-factor charger circuit Download PDFInfo
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- CN201430462Y CN201430462Y CN2009200680137U CN200920068013U CN201430462Y CN 201430462 Y CN201430462 Y CN 201430462Y CN 2009200680137 U CN2009200680137 U CN 2009200680137U CN 200920068013 U CN200920068013 U CN 200920068013U CN 201430462 Y CN201430462 Y CN 201430462Y
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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
Abstract
The utility model relates to a high-efficiency high-power-factor charger circuit which comprises a rectifying circuit, a transformer, a rectifying and filtering circuit, a voltage and current error signal sampling circuit, a photoelectric coupler, a pulse width modulation circuit and an N-channel transistor. The high-efficiency high-power-factor charger circuit is characterized in that the pulse width modulation circuit is a pulse width modulation and power factor correction double-functional circuit which comprises a peak current type boosting power factor correction chip and a peripheral circuit of the chip. Through a special connection method, the prior peak current type boosting power factor correction chip is adopted to form the pulse width modulation and power factor correction double-functional circuit which is used for replacing the pulse width modulation circuit in the prior art, thereby improving the power factor (larger than or equal to 0.95) of the entire charge circuit without increasing the cost and reducing the efficiency.
Description
Technical field
The utility model relates to battery charger, is specifically related to a kind of circuit of high-efficiency high power factor charger.
Background technology
In people's life, various electric tool, electronic articles for use such as electric bicycle all are furnished with storage battery, and therefore the charger use amount with these coordinative composition of equipments uses is huge.
Existing representative advanced, the circuit of ripe charger, as Fig. 1, shown in Figure 2, by first current rectifying and wave filtering circuit, transformer, second current rectifying and wave filtering circuit, electric current and voltage error signal sample circuit, photoelectrical coupler, a pulse-width modulation circuit and a N slot field-effect transistor constitute, AC power connects first current rectifying and wave filtering circuit, the output negative pole end ground connection of this first current rectifying and wave filtering circuit, and the end of the primary side first winding N1 of its output cathode termination transformer, and the other end of this primary side first winding N1 is through a N slot field-effect transistor and a grounding through resistance; The primary side second winding N2 of transformer connects second current rectifying and wave filtering circuit, and the output port of this second current rectifying and wave filtering circuit connects storage battery as the charging delivery outlet; And, telling one the tunnel on the described charging delivery outlet connects electric current and voltage error signal sample circuit and obtains error signal by its sampling, this error signal is imported pulse-width modulation circuit through photoelectrical coupler, the pulse-width modulation circuit output pulse signal is to the grid of N slot field-effect transistor, the break-make of control N slot field-effect transistor constitutes voltage and constant current feedback control type circuit structure.See shown in Figure 2ly, above-mentioned pulse-width modulation circuit constitutes by pulse-width modulation (PWM) chip IC 1 with by the chip periphery circuit that resistance, electric capacity, diode connect into, and is pulsewidth by the variation adjustment output pulse of input signal using.
Above-mentioned charger circuit has characteristics such as electrical isolation, voltage control and constant current control, and still, it still has an open defect: power factor cos Φ is seriously on the low side, greatly between 0.5～0.65.The direct result that power factor is on the low side to be caused makes electric main input electric current and voltage waveform distort exactly, the angle of flow of rectifier shortens greatly, current waveform becomes non-sinusoidal burst pulse, the operate as normal of this phenomenon serious harm electrical network increases severely the reactive power loss on the electrical network conveying circuit, has wasted a large amount of electric energy.Therefore, for complying with the developing direction of country's energy savings of advocating, the power factor that improves charger circuit is necessary.
But, usually people expect improving the power factor of charger circuit, be exactly to increase a circuit of power factor correction at original low power factor charger front end, this design not only cost increases, efficient is significantly reduced, attend to one thing and lose sight of another, so all not designs of do raising power factor of charger on the market now.
Summary of the invention
The utility model provides a kind of high-efficiency high power factor charger circuit, its objective is not lowering efficiency not increase under the prerequisite of cost to solve the existing low technical problem of charger circuit power factor.
For achieving the above object, the technical solution adopted in the utility model is: a kind of high-efficiency high power factor charger circuit comprises rectification circuit, transformer, current rectifying and wave filtering circuit, electric current and voltage error signal sample circuit, photoelectrical coupler, pulse-width modulation circuit and a N slot field-effect transistor; The input port of described rectification circuit connects AC power, its output negative pole end ground connection, and the head end of primary side first winding of the described transformer of its output cathode termination, and the tail end of this primary side first winding is through the described N slot field-effect transistor and first grounding through resistance; Primary side second winding of described transformer connects current rectifying and wave filtering circuit, the output port of this current rectifying and wave filtering circuit is as the charging delivery outlet, tell one the tunnel on this charging delivery outlet and connect electric current and voltage error signal sample circuit, the output of this electric current and voltage error signal sample circuit connects the input port of photoelectrical coupler, and the output port of photoelectrical coupler connects pulse-width modulation circuit, the pulse-width modulation circuit output pulse signal constitutes voltage and constant current feedback control type circuit structure to the grid of N slot field-effect transistor with this;
Described pulse-width modulation circuit is pulse-width modulation and power factor correction economic benefits and social benefits circuit, is made of peak electricity flow pattern step-up type power factor correcting chip and chip periphery circuit; Described chip periphery circuit is as follows:
Insert three the tunnel on the working power pin of described peak electricity flow pattern step-up type power factor correcting chip, wherein the first via is that output cathode end by described rectification circuit inserts through second resistance, the second the tunnel is that the primary side tertiary winding by described transformer inserts through first diode, the positive pole of first diode is towards the primary side tertiary winding, and Third Road is to be inserted by ground warp first electric capacity;
Be connected to the positive pole of described first diode on the zero current detection input pin of described peak electricity flow pattern step-up type power factor correcting chip through the 3rd resistance;
Tell two-way on the Voltage Feedback input pin of described peak electricity flow pattern step-up type power factor correcting chip, the one tunnel through the 4th resistance and to the working power pin, another Lu Jingdi five grounding through resistances;
Tell two-way on the multiplier input pin of described peak electricity flow pattern step-up type power factor correcting chip, the one tunnel connects the output cathode end of described rectification circuit through the 6th resistance, in addition the 7th resistance through being in parallel and second capacity earth on the way;
The compensation pin of described peak electricity flow pattern step-up type power factor correcting chip passes through the 3rd capacity earth, and, at the output port of the described photoelectrical coupler of the 3rd electric capacity two ends cross-over connection;
The grounding leg ground connection of described peak electricity flow pattern step-up type power factor correcting chip;
The current sampling input pin of described peak electricity flow pattern step-up type power factor correcting chip connects the source electrode of described N slot field-effect transistor;
The driving output pin of described peak electricity flow pattern step-up type power factor correcting chip connects the grid of described N slot field-effect transistor.
Related content in above-mentioned two technical schemes is explained as follows:
1, in the such scheme, described peak electricity flow pattern step-up type power factor correcting chip is meant a class chip, and concrete model is given an example: MC34261, MC34262, L6565, ML4831 etc.Recommending to adopt model is that MC34261 and model are the chip of MC34262, can make the pulse-width modulation of circuit and power factor correction reach optimum efficiency.
2, in the such scheme, the voltage signal for pulsating direct current (or title full-bridge rectification waveform) of the output cathode end of described rectification circuit output directly infeeds peak electricity flow pattern step-up type power factor correcting chip from this voltage signal sampling.
Design concept of the present utility model is: the utility model adopts peak electricity flow pattern step-up type power factor correcting chip, with its special connection, it is constituted pulse-width modulation and power factor correction economic benefits and social benefits circuit, substitute pulse-width modulation circuit of the prior art with it, thereby under the prerequisite that does not increase cost, do not lower efficiency, improved the power factor (reach 〉=0.95) of whole charger circuit.
Because the application of technique scheme, the utility model compared with prior art has the following advantages:
1, the prior art power factor is between 0.5～0.65, and the utility model power factor is increased to 〉=0.95, significantly improved power factor, make it can not increase the reactive loss on the electrical network, reached purpose of energy saving, huge because of charger use amount in people's life, popularization of the present utility model can be saved a large amount of electric energy, and realistic meaning is arranged very much;
2, prior art efficient is roughly about 85%, and the utility model efficient reaches about 86%, and efficient does not descend even increases;
3, the utility model adopts peak electricity flow pattern step-up type power factor correcting chip to constitute pulse-width modulation circuit, does not increase progression on circuit structure, and suitable with prior art complex structure degree, the number of spare parts of employing is also suitable substantially, does not increase on the cost;
4, the utility model can reach voltage control and the constant current control effect the same with prior art, and charging effect and fail safe do not descend yet.
Description of drawings
Accompanying drawing 2 is the prior art circuits schematic diagram;
Accompanying drawing 3 is the utility model schematic block circuit diagram;
Accompanying drawing 4 is the utility model embodiment circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: shown in accompanying drawing 3, accompanying drawing 4, a kind of high-efficiency high power factor charger circuit comprises rectification circuit, transformer TR1, current rectifying and wave filtering circuit, electric current and voltage error signal sample circuit, photoelectrical coupler, pulse-width modulation and power factor correction economic benefits and social benefits circuit and a N slot field-effect transistor Q1.
Described transformer TR1 adopts high frequency transformer, and it is the first winding N1 that primary side has a winding, and primary side has three windings: the second winding N2, tertiary winding NF and the 4th winding N3.N slot field-effect transistor Q1 adopts the N slot field-effect transistor.
Described rectification circuit is a full bridge rectifier, its front portion connects AC power frequency supply through the electromagnetic interference EMI filtering link of some inductance and electric capacity formation, its output negative pole end B ground connection, and its output cathode end A place output waveform is current waveform in full-wave rectifier (or claiming pulsating direct current), the capacitor C 4 though draw among Fig. 3, but the capacitance of capacitor C 4 is very small waveform is not reached filter effect, so the waveform of the output cathode end A of full bridge rectifier output is still current waveform in full-wave rectifier (or claiming pulsating direct current).Output cathode end A is connected to the head end of the primary side first winding N1 of transformer TR1, and the tail end of this primary side first winding N1 connects the drain electrode of N slot field-effect transistor Q1, and N slot field-effect transistor Q1's is that source electrode is through first resistance R, 9 ground connection; The primary side second winding N2 of described transformer TR1 connects current rectifying and wave filtering circuit, and this current rectifying and wave filtering circuit is made of diode D5 and capacitor C 8, C7, C11, R10.The output port of current rectifying and wave filtering circuit connects storage battery as charging delivery outlet DC OUT, tells one the tunnel on this charging delivery outlet DC OUT and connects electric current and voltage error signal sample circuit.Described electric current and voltage error signal sample circuit is made of voltage sampling comparator and current sampling comparator, and the output of voltage sampling comparator and current sampling comparator all and meet the input port PC1-1 of photoelectrical coupler.
Pulse-width modulation and power factor correction economic benefits and social benefits circuit are that MC34261 chip IC 1 and chip periphery circuit constitute by model; Described chip periphery circuit is as follows:
Model is to insert three the tunnel on the working power pin 8 of MC34261 chip IC 1, wherein the first via is to be inserted through second resistance R 6 by the output cathode end A of described rectification circuit, the second the tunnel is that primary side tertiary winding NF by described transformer inserts through the first diode D1, the positive pole of the first diode D1 is towards primary side tertiary winding NF, and Third Road is to be inserted through first capacitor C 5 by earth connection; Above-mentioned three the tunnel connect for chip operating voltage endlessly are provided;
Model is the positive pole that is connected to the described first diode D1 on the zero current detection input pin 5 of MC34261 chip IC 1 through the 3rd resistance R 7;
Model is to divide two-way on the Voltage Feedback input pin 1 of MC34261 chip IC 1, one the tunnel through the 4th resistance R 4 and to working power pin 8, another Lu Jingdi five resistance R 5 ground connection, here the 4th resistance R 4 and the 5th resistance R 5 provide a setting voltage value with its resistance size to MC34261 chip IC 1, so that 1 pair of output voltage of chip IC carries out pressure limiting;
Model is to divide two-way on the multiplier input pin 3 of MC34261 chip IC 1, one the tunnel meets the output cathode end A of described rectification circuit through the 6th resistance R 2, other is the 7th resistance R 3 through being in parallel and second capacitor C, 6 ground connection on the way, the 6th resistance R 2 here, in parallel the 7th resistance R 3 and second capacitor C 6 constitute voltage sample circuits, and it is MC34261 chip IC 1 that the current waveform in full-wave rectifier of the output cathode end A output of rectification circuit is carried out voltage sampling input model;
Model is by the 3rd capacitor C 7 ground connection on the compensation pin 2 of MC34261 chip IC 1, and, output port PC1-2 at the described photoelectrical coupler of the 3rd capacitor C 7 two ends cross-over connections, insert redeemings in this 3rd capacitor C 7, and the voltage of the compensation pin 2 by output port PC1-2 control chip IC1 is realized voltage and constant current control;
Model is grounding leg 6 ground connection of MC34261 chip IC 1;
Model is the source electrode that the current sampling input pin 4 of MC34261 chip IC 1 connects N slot field-effect transistor Q1;
Model is the driving output pin 7 of MC34261 chip IC 1 meets N slot field-effect transistor Q1 through one the 8th resistance R 8 a grid, thereby driving output pin 7 output pulse signals of chip IC 1 are controlled N slot field-effect transistor Q1 switch-on and-off to the grid of N slot field-effect transistor Q1.
As shown in Figure 4, the utility model circuit working principle is as follows substantially:
The 220V civil power enters L1 through fuse F1, L2, C1, the electromagnetic interference EMI filtering link that C2 and capacitor C 3 are formed, become current waveform in full-wave rectifier (or claiming pulsating direct current) by full-bridge rectification again, this current waveform in full-wave rectifier (or claiming pulsating direct current) is charged to first capacitor C 5 through second resistance R 6, when first capacitor C, 5 both end voltage reach model and are MC34261 chip IC 1 starting resistor, the driving output pin 7 output pulsed drive N slot field-effect transistor Q1 of MC34261 chip IC 1, because this circuit is the inverse-excitation type working method, the energy of storing among the full bridge rectifier TR1 when N slot field-effect transistor Q1 conducting is EL=1/2LI
2, N slot field-effect transistor Q1 changes closed condition into by conducting state when driving pulse disappears.The counter-rotating of the transformer TR1 primary side first winding N1 polarity of voltage, this portion of energy is exported after presenting rectifying and wave-filtering by the primary side second winding N2, the primary side tertiary winding NF of transformer TR1 makes IC1 that operating voltage supply endlessly be arranged by the first diode D1 to 5 chargings of first capacitor C simultaneously, primary side the 4th winding N3 winding of transformer TR1 is powered to capacitor C 12 by diode D3, comparator U2 is provided working power, and R2, R3, C6 finish the current waveform in full-wave rectifier voltage sampling of (or claiming pulsating direct current).This is the key that realizes power factor correction.R4, R5 finish the pressure limiting effect to output voltage.The U2 unit extracts the sampling current of output by R12, realizes constant current control (constant current accuracy can reach 1%) through the voltage of the compensation pin 2 of PC1-2 control IC 1 by control flows again through the electric current of PC1-1.U1 unit in-phase end takes out output voltage signal by R19, R20 dividing potential drop, and is same constant through the PC1-2 control output voltage again through the electric current of PC1-1 by control flows.And when comparator U2 entered constant current state, comparator U1 withdrawed from pressure constant state automatically.
Present embodiment under the prerequisite that does not increase cost, do not lower efficiency, has improved the power factor (reach 〉=0.95) of whole charger circuit.
In the foregoing description, rectification circuit, current rectifying and wave filtering circuit, electric current and voltage error signal sample circuit all can adopt other available circuits.Model is the also replaceable chip for model MC34262, L6565 or ML4831 of MC34261 chip IC 1.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection range of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.
Claims (3)
1, a kind of high-efficiency high power factor charger circuit comprises rectification circuit, transformer (TR1), current rectifying and wave filtering circuit, electric current and voltage error signal sample circuit, photoelectrical coupler, pulse-width modulation circuit and a N slot field-effect transistor (Q1); The input port of described rectification circuit connects AC power, its output negative pole end (B) ground connection, and its output cathode end (A) connects the head end of primary side first winding (N1) of described transformer (TR1), and the tail end of this primary side first winding (N1) is through described N slot field-effect transistor (Q1) and first resistance (R9) ground connection; Primary side second winding (N2) of described transformer (TR1) connects current rectifying and wave filtering circuit, the output port of this current rectifying and wave filtering circuit is as charging delivery outlet (DCOUT), tell one the tunnel on this charging delivery outlet (DC OUT) and connect electric current and voltage error signal sample circuit, the output of this electric current and voltage error signal sample circuit connects the input port (PC1-1) of photoelectrical coupler, and the output port of photoelectrical coupler (PC1-2) connects pulse-width modulation circuit, the pulse-width modulation circuit output pulse signal constitutes voltage and constant current feedback control type circuit structure to the grid of N slot field-effect transistor (Q1) with this; It is characterized in that:
Described pulse-width modulation circuit is pulse-width modulation and power factor correction economic benefits and social benefits circuit, is made of peak electricity flow pattern step-up type power factor correcting chip (IC1) and chip periphery circuit; Described chip periphery circuit is as follows:
The working power pin (8) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) is gone up and is inserted three the tunnel, wherein the first via is that output cathode end (A) by described rectification circuit inserts through second resistance (R6), the second the tunnel is that the primary side tertiary winding (NF) by described transformer inserts through first diode (D1), the positive pole of first diode (D1) is towards the primary side tertiary winding (NF), and Third Road is to be inserted by ground warp first electric capacity (C5);
The zero current detection input pin (5) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) is gone up the positive pole that is connected to described first diode (D1) through the 3rd resistance (R7);
Tell two-way on the Voltage Feedback input pin (1) of described peak electricity flow pattern step-up type power factor correcting chip (IC1), the one tunnel through the 4th resistance (R4) and to working power pin (8), another Lu Jingdi five resistance (R5) ground connection;
Tell two-way on the multiplier input pin (3) of described peak electricity flow pattern step-up type power factor correcting chip (IC1), one the tunnel connects the output cathode end (A) of described rectification circuit through the 6th resistance (R2), in addition the 7th resistance (R3) through being in parallel and second electric capacity (C6) ground connection on the way;
The compensation pin (2) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) passes through the 3rd electric capacity (C7) ground connection, and, at the output port (PC1-2) of the described photoelectrical coupler of the 3rd electric capacity (C7) two ends cross-over connection;
Grounding leg (6) ground connection of described peak electricity flow pattern step-up type power factor correcting chip (IC1);
The current sampling input pin (4) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) connects the source electrode of described N slot field-effect transistor (Q1);
The driving output pin (7) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) connects the grid of described N slot field-effect transistor (Q1).
2, high-efficiency high power factor charger circuit according to claim 1 is characterized in that: described peak electricity flow pattern step-up type power factor correcting chip (IC1) model is MC34261 or MC34262.
3, high-efficiency high power factor charger circuit according to claim 1 is characterized in that: described peak electricity flow pattern step-up type power factor correcting chip (IC1) model is L6565 or ML4831.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200680137U CN201430462Y (en) | 2009-02-24 | 2009-02-24 | High-efficiency high-power-factor charger circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200680137U CN201430462Y (en) | 2009-02-24 | 2009-02-24 | High-efficiency high-power-factor charger circuit |
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| CN201430462Y true CN201430462Y (en) | 2010-03-24 |
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| CN2009200680137U Expired - Lifetime CN201430462Y (en) | 2009-02-24 | 2009-02-24 | High-efficiency high-power-factor charger circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710137A (en) * | 2012-05-25 | 2012-10-03 | 无锡实益达电子有限公司 | Low power switch power supply with high power factor and low current ripple |
| CN101515726B (en) * | 2009-02-24 | 2013-06-19 | 苏州工业园区华波电子科技有限公司 | High-efficiency high power factor charger circuit |
| WO2017107452A1 (en) * | 2015-12-22 | 2017-06-29 | 乐视控股（北京）有限公司 | Switch voltage stabilization power source |
-
2009
- 2009-02-24 CN CN2009200680137U patent/CN201430462Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515726B (en) * | 2009-02-24 | 2013-06-19 | 苏州工业园区华波电子科技有限公司 | High-efficiency high power factor charger circuit |
| CN102710137A (en) * | 2012-05-25 | 2012-10-03 | 无锡实益达电子有限公司 | Low power switch power supply with high power factor and low current ripple |
| WO2017107452A1 (en) * | 2015-12-22 | 2017-06-29 | 乐视控股（北京）有限公司 | Switch voltage stabilization power source |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100324 Effective date of abandoning: 20090224 |
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| RGAV | Abandon patent right to avoid regrant |