CN101515726B - High-efficiency high power factor charger circuit - Google Patents
High-efficiency high power factor charger circuit Download PDFInfo
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- CN101515726B CN101515726B CN200910046553XA CN200910046553A CN101515726B CN 101515726 B CN101515726 B CN 101515726B CN 200910046553X A CN200910046553X A CN 200910046553XA CN 200910046553 A CN200910046553 A CN 200910046553A CN 101515726 B CN101515726 B CN 101515726B
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Abstract
The invention relates to a high-efficiency high power factor charger circuit which comprises a rectification circuit, a transformer, a rectifier filter circuit, a voltage current error signal sample circuit, a photocoupler, a pulse-width modulation circuit and an N slot field-effect transistor; the charger circuit is characterized in that the pulse-width modulation circuit is a double-effect circuit for pulse-width modulation and power factor correction, and is formed by a summit current type boosting power factor correction chip and a chip peripheral circuit. The invention adopts the existing summit current type boosting power factor correction chip at the market and uses the special connecting method, so that the double-effect circuit for pulse-width modulation and power factor correction can be formed and used for replacing the pulse-width modulation circuit in the prior art, thus improving the power factor (being more than or equal to 0.95) of the whole charger circuit on the premise that the cost is not increased and the efficiency is not reduced.
Description
Technical field
The present invention relates to battery charger, be 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 be furnished with storage battery, with the charger use amount of these coordinative composition of equipments uses, is therefore huge.
Existing representative more advanced, the circuit of ripe charger, as Fig. 1, shown in Fig. 2, by the first current rectifying and wave filtering circuit, transformer, the second 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 form, AC power connects the 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 the first winding N1 is through N slot field-effect transistor and a grounding through resistance, the primary side second winding N2 of transformer connects the 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, separating a road on described charging delivery outlet connects electric current and voltage error signal sample circuit and obtains error signal by its sampling, this error signal is inputted 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, control the break-make of N slot field-effect transistor, form voltage and constant current feedback control type circuit structure.As shown in Figure 2, above-mentioned pulse-width modulation circuit consists of pulse-width modulation (PWM) chip IC 1 and the chip periphery circuit that connected into by resistance, electric capacity, diode, using, is the pulsewidth by the variation adjustment output pulse of input signal.
Above-mentioned charger circuit has the characteristics such as electrical isolation, voltage control and constant current control, and still, it still has an open defect: power factor (PF) cos Φ is seriously on the low side, greatly between 0.5～0.65.The direct result that power factor (PF) is on the low side to be caused makes electric main input electric current and voltage waveform distorted exactly, the angle of flow of rectifier shortens greatly, current waveform becomes non-sinusoidal burst pulse, the normal operation 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 power factor correction circuit at original low-power factor charger front end, this design not only cost increases, most importantly can make efficiency significantly reduce, attend to one thing and lose sight of another, therefore the charger showed does not on the market all do to improve the design of power factor (PF).
Summary of the invention
The invention provides a kind of high-efficiency high power factor charger circuit, its objective is and solve the existing low technical problem of charger circuit power factor (PF) not lowering efficiency not increase under the prerequisite of cost.
For achieving the above object, the technical solution used in the present invention 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 the first winding is through described N slot field-effect transistor and the 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, separate a road 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, to the grid of N slot field-effect transistor, forms voltage and constant current feedback control type circuit structure with this;
Described pulse-width modulation circuit is pulse-width modulation and power factor correction economic benefits and social benefits circuit, peak electricity flow pattern step-up type power factor correcting chip and chip periphery circuit, consists of; Described chip periphery circuit is as follows:
Access three tunnels 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 accesses through the second resistance, the second tunnel is that the primary side tertiary winding by described transformer accesses through the first diode, the positive pole of the first diode is towards the primary side tertiary winding, and Third Road is by ground the first electric capacity access;
Be connected to the positive pole of described the 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;
Separate two-way on the Voltage Feedback input pin of described peak electricity flow pattern step-up type power factor correcting chip, a road the 4th resistance to the working power pin, another Lu Jing five grounding through resistances;
Separate two-way on the multiplier input pin of described peak electricity flow pattern step-up type power factor correcting chip, a road the 6th resistance connects the output cathode end of described rectification circuit, another the 7th resistance and the second capacity earth through being in parallel 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 driver 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 such scheme, described peak electricity flow pattern step-up type power factor correcting chip refers to a class chip, and concrete model is given an example: MC34261, MC34262, L6565, ML4831 etc.The recommend adoption model is the chip that MC34261 and model are MC34262, can make the pulse-width modulation of circuit and power factor correction reach optimum efficiency.
2,, in 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 feed peak electricity flow pattern step-up type power factor correcting chip from this voltage signal sampling.
Design concept of the present invention is: the present invention adopts peak electricity flow pattern step-up type power factor correcting chip, with its special connection, it is formed to 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.
Due to the application of technique scheme, the present invention compared with prior art has the following advantages:
1, the prior art power factor is between 0.5～0.65, and power factor of the present invention is increased to >=0.95, significantly improved power factor, making it can not increase the reactive loss on electrical network, reached energy-conservation purpose, huge because of charger use amount in people's life, popularization of the present invention can be saved a large amount of electric energy, and realistic meaning is arranged very much;
2, prior art efficiency is roughly in 85% left and right, and efficiency of the present invention reaches 86% left and right, and efficiency does not descend and even increases;
3, the present invention adopts peak electricity flow pattern step-up type power factor correcting chip to form 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 substantially suitable, on cost, does not increase;
4, effect is controlled in the present invention can reach like the prior art voltage control and constant current, and charging effect and fail safe do not descend yet.
The accompanying drawing explanation
Accompanying drawing 1 is the prior art circuits schematic block diagram;
Accompanying drawing 2 is the prior art circuits schematic diagram;
Accompanying drawing 3 is schematic block circuit diagram of the present invention;
Accompanying drawing 4 is embodiment of the present invention circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment mono-: shown in accompanying drawing 3, accompanying drawing 4, a kind of high-efficiency high power factor charger circuit, comprise 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 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), though draw a capacitor C 4 in Fig. 3, but the capacitance of capacitor C 4 is very small, waveform is not reached to filter effect, therefore 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 primary side the first winding N1 of transformer TR1, and the tail end of this primary side the 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 the first resistance R 9 ground connection; Primary side the second winding N2 of described transformer TR1 connects current rectifying and wave filtering circuit, and this current rectifying and wave filtering circuit consists 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, separates a road on this charging delivery outlet DCOUT and connects electric current and voltage error signal sample circuit.Described electric current and voltage error signal sample circuit consists 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 form by model; Described chip periphery circuit is as follows:
Access three tunnels on the working power pin 8 that model is MC34261 chip IC 1, wherein the first via is through the second resistance R 6 accesses by the output cathode end A of described rectification circuit, the second tunnel is that the primary side tertiary winding NF by described transformer accesses through the first diode D1, the positive pole of the first diode D1 is towards primary side tertiary winding NF, and Third Road is through the first capacitor C 5 accesses by earth connection; Above-mentioned three tunnels are connected operating voltage endlessly are provided for chip;
Be connected to the positive pole of described the first diode D1 on the zero current detection input pin 5 that model is MC34261 chip IC 1 through the 3rd resistance R 7;
Minute two-way on the Voltage Feedback input pin 1 that model is MC34261 chip IC 1, one tunnel the 4th resistance R 4 to working power pin 8, another Lu Jing 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;
Minute two-way on the multiplier input pin 3 that model is MC34261 chip IC 1, one tunnel the 6th resistance R 2 meets the output cathode end A of described rectification circuit, another the 7th resistance R 3 through being in parallel and the second capacitor C 6 ground connection on the way, the 6th resistance R 2 here, in parallel the 7th resistance R 3 and the second capacitor C 6 form 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 to voltage sampling input model;
Pass through the 3rd capacitor C 7 ground connection on the compensation pin 2 that model is MC34261 chip IC 1, and, output port PC1-2 at the described photoelectrical coupler of the 3rd capacitor C 7 two ends cross-over connection, in the 7 access redeemings of this 3rd capacitor C, and the voltage of the compensation pin 2 by output port PC1-2 control chip IC1 realizes that voltage and constant current control;
Grounding leg 6 ground connection that model is MC34261 chip IC 1;
The current sampling input pin 4 that model is MC34261 chip IC 1 connects the source electrode of N slot field-effect transistor Q1;
The driver output pin 7 that model is MC34261 chip IC 1 connects the grid of N slot field-effect transistor Q1 through one the 8th resistance R 8, thereby driver output pin 7 output pulse signals of chip IC 1, to the grid of N slot field-effect transistor Q1, are controlled N slot field-effect transistor Q1 switch-on and-off.
As shown in Figure 4, circuit working principle of the present invention is substantially as follows:
The 220V civil power enters L1 through fuse F1, L2, C1, the electromagnetic interference EMI filtering link that C2 and capacitor C 3 form, 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 the first capacitor C 5 through the second resistance R 6, when the first capacitor C 5 both end voltage reach model and are MC34261 chip IC 1 starting resistor, the driver 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 in full bridge rectifier TR1 when N slot field-effect transistor Q1 conducting is EL=1/2LI
2, when driving pulse disappears, N slot field-effect transistor Q1 changes closed condition into by conducting state.The the first winding N1 polarity of voltage reversion of transformer TR1 primary side, this portion of energy is exported after presenting rectifying and wave-filtering by primary side the 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 the first capacitor C 5 chargings simultaneously, the primary side of transformer TR1 the 4th winding N3 winding is powered to capacitor C 12 by diode D3, comparator U2 working power is provided, and R2, R3, C6 complete the current waveform in full-wave rectifier voltage sampling of (or claiming pulsating direct current).This is the key that realizes Active PFC.R4, R5 complete the pressure limiting effect to output voltage.The U2 unit extracts the sampling current of output by R12, by flow through voltage that the electric current of PC1-1 controls the compensation pin 2 of IC1 through PC1-2 again of control, realize that constant current controls (constant current accuracy can reach 1%).U1 unit in-phase end takes out output voltage signal by R19, R20 dividing potential drop, and by control, flowing through equally, to control output voltage through PC1-2 more constant for the electric current of PC1-1.And, when comparator U2 enters constant current state, comparator U1 exits pressure constant state automatically.
The present embodiment, under the prerequisite that does not increase cost, do not lower efficiency, improved the power factor (reach >=0.95) of whole charger circuit.
In above-described embodiment, 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.
Above-described embodiment is only explanation technical conceive of the present invention and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. a high-efficiency high power factor charger circuit, comprise 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 the first winding (N1) is through described N slot field-effect transistor (Q1) and the 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), separate a road 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 is to the grid of N slot field-effect transistor (Q1), form voltage and constant current feedback control type circuit structure 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, peak electricity flow pattern step-up type power factor correcting chip (IC1) and chip periphery circuit, consists of; Described chip periphery circuit is as follows:
The upper access of the working power pin (8) of described peak electricity flow pattern step-up type power factor correcting chip (IC1) three tunnels, wherein the first via is that output cathode end (A) by described rectification circuit accesses through the second resistance (R6), the second tunnel is that the primary side tertiary winding (NF) by described transformer accesses through the first diode (D1), the positive pole of the first diode (D1) is towards the primary side tertiary winding (NF), and Third Road is to be accessed by ground the first electric capacity (C5);
The upper positive pole that is connected to described the first diode (D1) through the 3rd resistance (R7) of the zero current detection input pin (5) of described peak electricity flow pattern step-up type power factor correcting chip (IC1);
Separate two-way on the Voltage Feedback input pin (1) of described peak electricity flow pattern step-up type power factor correcting chip (IC1), one tunnel the 4th resistance (R4) is also upper to working power pin (8), another Lu Jing five resistance (R5) ground connection;
Separate two-way on the multiplier input pin (3) of described peak electricity flow pattern step-up type power factor correcting chip (IC1), one tunnel the 6th resistance (R2) connects the output cathode end (A) of described rectification circuit, another the 7th resistance (R3) through being in parallel and the 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 driver 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, it 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, it is characterized in that: described peak electricity flow pattern step-up type power factor correcting chip (IC1) model is L6565 or ML4831.
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| CN200910046553XA CN101515726B (en) | 2009-02-24 | 2009-02-24 | High-efficiency high power factor charger circuit |
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| CN200910046553XA CN101515726B (en) | 2009-02-24 | 2009-02-24 | High-efficiency high power factor charger circuit |
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| CN101515726B true CN101515726B (en) | 2013-06-19 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807809B (en) * | 2010-05-10 | 2013-02-27 | 无锡新畅电子有限公司 | Charging circuit for lead acid batteries with high power factors |
| CN102843025B (en) | 2012-08-06 | 2015-01-07 | 台达电子工业股份有限公司 | Control circuit, control method, and power supply system for power factor correction (PFC) circuit |
| KR101321236B1 (en) * | 2012-11-01 | 2013-10-28 | 명지대학교 산학협력단 | Output voltage ripple compensator of power factor correction converter and battery charging device for electric vehicle using thereof |
| CN104935155B (en) * | 2015-06-15 | 2017-06-20 | 山东超越数控电子有限公司 | A kind of method for designing for DC D/C power Ripple Suppressions |
| CN107370399A (en) * | 2016-05-13 | 2017-11-21 | 中兴通讯股份有限公司 | A kind of loop compensation circuit, switching power circuit and Switching Power Supply charger |
| JP6660253B2 (en) * | 2016-06-02 | 2020-03-11 | Ntn株式会社 | Battery charger |
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| CN2595063Y (en) * | 2003-01-06 | 2003-12-24 | 李善根 | Active power factor corrector with low cost |
| CN2775928Y (en) * | 2004-12-17 | 2006-04-26 | 康佳集团股份有限公司 | Switch power capable of correcting power factor |
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| CN201430462Y (en) * | 2009-02-24 | 2010-03-24 | 苏州工业园区华波电子科技有限公司 | High-efficiency high-power-factor charger circuit |
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Patent Citations (4)
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| CN2595063Y (en) * | 2003-01-06 | 2003-12-24 | 李善根 | Active power factor corrector with low cost |
| CN2775928Y (en) * | 2004-12-17 | 2006-04-26 | 康佳集团股份有限公司 | Switch power capable of correcting power factor |
| CN101227778A (en) * | 2008-02-19 | 2008-07-23 | 东南大学 | Self-excited oscillation type high power LED constant-current driving circuit |
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