CN202696168U - Active power factor correcting circuit - Google Patents
Active power factor correcting circuit Download PDFInfo
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- CN202696168U CN202696168U CN 201220317560 CN201220317560U CN202696168U CN 202696168 U CN202696168 U CN 202696168U CN 201220317560 CN201220317560 CN 201220317560 CN 201220317560 U CN201220317560 U CN 201220317560U CN 202696168 U CN202696168 U CN 202696168U
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- power factor
- factor correction
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to an active power factor correcting circuit which comprises a power factor correcting chip U1, a boost inductor T1, a switch tube Q1, a thermistor NTC, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a first filtering capacitor C1, a second filtering capacitor C2 and a third filtering capacitor C3. The active power factor correcting circuit not only realizes the correction on high power factors, but also improves the power factors of the circuit and reduces the harmonic interference of an affective tone quality power grid; and moreover, the output voltage is stabilized, and the power supply efficiency is improved.
Description
Technical field
The utility model electronic technology field relates to a kind of APFC.
Background technology
Power factor refers to the relation between effective power and the total power consumption (apparent power), and namely effective power is divided by the ratio of total power consumption (apparent power).Along with the development of society, society constantly increases the demand of electric power, and in most of power consumption equipment, its operating voltage is directly taken from AC network.So have the nonlinear loads such as many power electronic equipments, electromagnetic equipment and electronic equipment in the electrical network, make electrical network produce harmonic voltage and electric current.And many AC-DC rectification circuits of not taking power factor correction technology, input current waveform is the spike shape.Therefore, the alternating current net side power factor only has 0.5-0.7, and total harmonic distortion (THD) of electric current is very large, and can surpass the 100%(power factor is 0.999 o'clock, and THD is about 3%).Power factor is excessively low, the output of power supply unit has been increased the ratio of reactive power, reduces the service efficiency of the energy, and electric ballast can produce a large current cycle, and heat accumulation is at power bus, and the transmission line insulating barrier damages, and causes fire; Current harmonic content is high, and high-frequency electric ballast and supply harmonic disturb, and affect its normal operation.Therefore, improve power factor, the namely power factor correction of content that reduces harmonic wave becomes very important research direction in the field of switch power.
Summary of the invention
The purpose of this utility model will overcome the deficiencies in the prior art exactly, the APFC that provides a kind of novel LED to drive.
The utility model comprises power factor correction chip U1, boost inductance T1, switching tube Q1, thermistor NTC, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7, the first rectifier diode D1, the second voltage stabilizing didoe D2, the 3rd booster diode D3, the model of described power factor correction chip U1 is L6562A.
1 pin of power factor correction chip U1 is connected with the end of the 5th filter capacitor C5, the end of the 6th filter capacitor C6, an end of the 16 resistance R 16, an end of the 17 resistance R 17, an end of the 15 resistance R 15; 2 pin of power factor correction chip U1 are connected with an end of the other end of the 5th filter capacitor C5, the 9th resistance R 9; The other end of the 9th resistance R 9 is connected with the other end of the 6th filter capacitor C6; 3 pin of power factor correction chip U1 are connected with an end of the second resistance R 2, an end of the 3rd resistance R 3, the end of the first filter capacitor C1; 4 pin of power factor correction chip U1 are connected with an end of the tenth resistance R 10; 5 pin of power factor correction chip U1 are connected with an end of the 7th resistance R 7; 6 pin of power factor correction chip U1 are connected with anode, the earth terminal of the second voltage stabilizing didoe D2; 7 pin of power factor correction chip U1 are connected with an end of the 8th resistance R 8; 8 pin of power factor correction chip U1 are connected with the end of the second filter capacitor C2 one end, the 3rd filter capacitor C3, an end of the 5th resistance R 5, the negative electrode of the first rectifier diode D1.
One end of boost inductance T1 primary coil is connected with an end, an end of the first resistance R 1, the voltage input end Vin of the 4th resistance R 4; The other end of boost inductance T1 primary coil is connected with the drain electrode of the anode of the 3rd booster diode D3, switching tube Q1; One end of boost inductance T1 secondary coil is connected with an end of the 6th resistance R 6, the other end of the 7th resistance R 7; The other end of boost inductance T1 secondary coil is connected with earth terminal.
The grid of switching tube Q1 is connected with the other end of the 8th resistance R 8, an end of the 13 resistance R 13; The source electrode of switching tube Q1 is connected with the other end of the tenth resistance R 10, an end of the 11 resistance R 11, an end of the 12 resistance R 12, the other end of the 13 resistance R 13.
The other end of the first resistance R 1 is connected with the other end of the second resistance R 2, the other end of the 4th resistance R 4 is connected with the other end of the 5th resistance R 5, the end of the 4th filter capacitor C4 and the anode of the first rectifier diode D1, the negative electrode of the second voltage stabilizing didoe D2 connects, the other end of the other end of the 4th filter capacitor C4 and the 6th resistance R 6 connects, the end of thermistor NTC is connected with the negative electrode of the 3rd booster diode D3, one end of the other end of thermistor NTC and the 14 resistance R 14, the end of the 7th filter capacitor C7 connects, the other end of the 14 resistance R 14 is connected with the other end of the 15 resistance R 15, the other end of the 3rd resistance R 3, the other end of the first filter capacitor C1, the other end of the second filter capacitor C2, the other end of the 3rd filter capacitor C3, the other end of the 11 resistance R 11, the other end of the 12 resistance R 12, the other end of the 16 resistance R 16, the other end of the 17 resistance R 17, the other end of the 7th filter capacitor C7 is connected with earth terminal, the Vin termination is through the voltage behind the rectifying and wave-filtering, and the two ends of the 7th filter capacitor C7 are as output.
The utility model is not only realized the correction to High Power Factor, has improved the power factor of circuit, and effectively the tonequality mains by harmonics disturbs, and regulated output voltage, raising power-efficient.
Description of drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model comprises power factor correction chip U1, boost inductance T1, switching tube Q1, thermistor NTC, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7, the first rectifier diode D1, the second voltage stabilizing didoe D2, the 3rd booster diode D3.
1 pin of power factor correction chip U1 is connected with the end of the 5th filter capacitor C5, the end of the 6th filter capacitor C6, an end of the 16 resistance R 16, an end of the 17 resistance R 17, an end of the 15 resistance R 15; 2 pin of power factor correction chip U1 are connected with an end of the other end of the 5th filter capacitor C5, the 9th resistance R 9; The other end of the 9th resistance R 9 is connected with the other end of the 6th filter capacitor C6; 3 pin of power factor correction chip U1 are connected with an end of the second resistance R 2, an end of the 3rd resistance R 3, the end of the first filter capacitor C1; 4 pin of power factor correction chip U1 are connected with an end of the tenth resistance R 10; 5 pin of power factor correction chip U1 are connected with an end of the 7th resistance R 7; 6 pin of power factor correction chip U1 are connected with anode, the earth terminal of the second voltage stabilizing didoe D2; 7 pin of power factor correction chip U1 are connected with an end of the 8th resistance R 8; 8 pin of power factor correction chip U1 are connected with the end of the second filter capacitor C2 one end, the 3rd filter capacitor C3, an end of the 5th resistance R 5, the negative electrode of the first rectifier diode D1.
Power factor correction chip U1 is L6562A, the capability value of the first filter capacitor C1 and the 3rd filter capacitor C3 is 0.01uF, the employing 22uf/25V of the second filter capacitor C2, the capability value of the 5th filter capacitor C5 is 0.1uF, the 6th filter capacitor C6 capability value is 1uF, the resistance of the second resistance R 2 is 1M Ω, the 3rd resistance R 3 resistances are 15K Ω, the resistance of the 5th resistance R 5 is 270K Ω, the resistance of the 7th resistance R 7 is 47K Ω, the resistance of the 8th resistance R 8 is 20 Ω, and the resistance of the 9th resistance R 9 is 10K Ω, and the resistance of the tenth resistance R 10 is 0.1 Ω, the first rectifier diode D1 is IN4147, and the second voltage stabilizing didoe D2 is 1N5248B.
One end of boost inductance T1 primary coil is connected with an end, an end of the first resistance R 1, the voltage input end Vin of the 4th resistance R 4; The other end of boost inductance T1 primary coil is connected with the drain electrode of the anode of the 3rd booster diode D3, switching tube Q1; One end of boost inductance T1 secondary coil is connected with an end of the 6th resistance R 6, the other end of the 7th resistance R 7; The other end of boost inductance T1 secondary coil is connected with earth terminal.
The grid of switching tube Q1 is connected with the other end of the 8th resistance R 8, an end of the 13 resistance R 13; The source electrode of switching tube Q1 is connected with the other end of the tenth resistance R 10, an end of the 11 resistance R 11, an end of the 12 resistance R 12, the other end of the 13 resistance R 13.
When the switching tube conducting, the electric current in the inductance coil is linear to be increased, and energy becomes magnetic energy by electric energy conversion, stores in the inductance, and to load provide the energy that need by output capacitance this moment; When switching tube turn-offs, effect because of inductance, inductive current can not suddenly change, connect backward load and electric capacity of the opposite and input voltage of the polarity of voltage of inductance induction this moment provides energy, and the switching tube drain voltage is suspended on the high pressure, along with inductive discharge to zero, the switch tube voltage drain voltage is reduced to rapidly below the instantaneous line voltage, after zero current detection, the pipe conducting of opening the light enters next cycle.
Boost inductance T1 selects the PQ3220 magnetic core of PC44 material, it is the enamelled wire of 0.31mm that primary coil adopts 48 circle diameters, it is the 0.31mm enamelled wire that secondary coil adopts 5 circle diameters, switching tube Q1 selects STP12NM50, the resistance of the first resistance R 1 is 1M Ω, the resistance of the 4th resistance R 4 is 270K Ω, the resistance of the 6th resistance R 6 is 50 Ω, the resistance of the 8th resistance R 8 is 20 Ω, the 11 resistance R 11 and the 12 resistance R 12 adopt the power resistor of 0.33 Ω/2W, the 13 resistance R 13 resistance be 10K Ω, the 3rd booster diode D3 adopts supper-fast recovery diode STTH5L06.
The other end of the first resistance R 1 is connected with the other end of the second resistance R 2, the other end of the 4th resistance R 4 is connected with the other end of the 5th resistance R 5, the other end of the other end of the 4th filter capacitor C4 and the 6th resistance R 6 connects, the end of thermistor NTC is connected with the negative electrode of the 3rd booster diode D3, one end of the other end of thermistor NTC and the 14 resistance R 14, the end of the 7th filter capacitor C7 connects, the other end of the 14 resistance R 14 is connected with the other end of the 15 resistance R 15, the other end of the 3rd resistance R 3, the other end of the first filter capacitor C1, the other end of the second filter capacitor C2, the other end of the 3rd filter capacitor C3, the other end of the 11 resistance R 11, the other end of the 12 resistance R 12, the other end of the 16 resistance R 16, the other end of the 17 resistance R 17, the other end of the 7th filter capacitor C7 is connected with earth terminal, the Vin termination is through the voltage behind the rectifying and wave-filtering, and the two ends of the 7th filter capacitor C7 are as output.
The capacitance of the 4th filter capacitor C4 is 10nF, the 7th filter capacitor C7 adopts the electrochemical capacitor of 100uF/450V, the resistance of the 14 resistance R 14 is 1M Ω, the resistance of the 15 resistance R 15 is 1M Ω, the resistance of the 16 resistance R 16 is 15K Ω, the resistance of the 17 resistance R 17 is 82K Ω, and thermistor NTC resistance is 2.5 Ω.
In Fig. 1,5 pin of power factor correction chip L6562A are zero current detection inputs, are connected on secondary coil one end of boost inductance, thereby what detect is inductive current, and namely external power flows into the electric current of load.When inductive current is zero, the output switching activity of 5 pin, with the rest-set flip-flop set of inside, 7 pin of power factor correction chip L6562A output high level makes switching tube Q1 conducting.The output voltage of power factor correction is input to the end of oppisite phase of error amplifier through the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the sampling of the 17 resistance R 17 dividing potential drops by 1 pin of power factor correction chip L6562A.This voltage is after error amplifier amplifies, and the magnitude of voltage of inputting with 3 pin of power factor correction chip L6562A multiplies each other in multiplier.The current ratio of the switching tube Q1 of the 4 pin input of the output of multiplier and power factor correction chip L6562A.
When the current value of input switch pipe Q1 during greater than the current value of multiplier output, with the rest-set flip-flop reset, Q1 is turn-offed in the upset of the 7 pin output levels of power factor correction chip L6562A.Therefore, the output current of multiplier is the threshold value by the electric current of Q1, and this threshold value presents sinusoidal rule and changes with the variation of input voltage is approximate.Have no progeny when switching tube Q1 closes, the electric current of a side of boost inductance reduces gradually, when this electric current approaches zero, causes again the 5 pin output switching activities of power factor correction chip L6562A, with the rest-set flip-flop set, and switching tube Q1 conducting.Make that phase difference reduces between the fundamental current that exchanges input and the voltage, thereby improve power factor.
The first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 consist of resistance pressure-dividing network, and in order to determine waveform and the phase place of input voltage, the first capacitor C 1 is in order to consider the high-frequency interferencing signal except No. 3 pins; The secondary winding of boost inductance T1, one side are delivered to the inductive current zero cross signal by the 7th resistance R 75 pin of power factor correction chip L6562A, the power supply when working as chip on the other hand; Power factor correction chip L6562A drives signal is linked metal-oxide-semiconductor by the 18 resistance R 8 and the 13 resistance R 13 gate pole; The 11 resistance R 11 and the 12 resistance R 12 detect resistance as inductive current, rising edge (metal-oxide-semiconductor electric current) in order to the inductive current of sampling, this resistance one is terminated at systematically, and the other end is connected on the source electrode of switching tube Q1 simultaneously, is connected to simultaneously 4 pin of chip through the tenth resistance R 10; The 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16 and the 17 resistance R 17 consist of resistance pressure-dividing network, form simultaneously the negative feedback loop of output voltage; The 5th capacitor C 5 is connected between chip 1,2 pin, to form the compensating network of Voltage loop; The 6th resistance R 6, the four capacitor C 4, diode D1, the secondary of voltage-stabiliser tube D2 and boost inductance T1 then consists of chip power jointly.
Claims (1)
1. APFC, it is characterized in that: comprise power factor correction chip U1, boost inductance T1, switching tube Q1, thermistor NTC, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7, the first rectifier diode D1, the second voltage stabilizing didoe D2 and the 3rd booster diode D3, the model of described power factor correction chip U1 is L6562A;
1 pin of power factor correction chip U1 is connected with the end of the 5th filter capacitor C5, the end of the 6th filter capacitor C6, an end of the 16 resistance R 16, an end of the 17 resistance R 17, an end of the 15 resistance R 15; 2 pin of power factor correction chip U1 are connected with an end of the other end of the 5th filter capacitor C5, the 9th resistance R 9; 3 pin of power factor correction chip U1 are connected with an end of the second resistance R 2, an end of the 3rd resistance R 3, the end of the first filter capacitor C1; 4 pin of power factor correction chip U1 are connected with an end of the tenth resistance R 10; 5 pin of power factor correction chip U1 are connected with an end of the 7th resistance R 7; 6 pin of power factor correction chip U1 are connected with anode, the earth terminal of the second voltage stabilizing didoe D2; 7 pin of power factor correction chip U1 are connected with an end of the 8th resistance R 8; 8 pin of power factor correction chip U1 are connected with the end of the second filter capacitor C2 one end, the 3rd filter capacitor C3, an end of the 5th resistance R 5, the negative electrode of the first rectifier diode D1;
One end of boost inductance T1 primary coil is connected with an end, an end of the first resistance R 1, the voltage input end Vin of the 4th resistance R 4; The other end of boost inductance T1 primary coil is connected with the drain electrode of the anode of the 3rd booster diode D3, switching tube Q1; One end of boost inductance T1 secondary coil is connected with an end of the 6th resistance R 6, the other end of the 7th resistance R 7; The other end of boost inductance T1 secondary coil is connected with earth terminal;
The grid of switching tube Q1 is connected with the other end of the 8th resistance R 8, an end of the 13 resistance R 13; The source electrode of switching tube Q1 is connected with the other end of the tenth resistance R 10, an end of the 11 resistance R 11, an end of the 12 resistance R 12, the other end of the 13 resistance R 13;
The other end of the first resistance R 1 is connected with the other end of the second resistance R 2, the other end of the 4th resistance R 4 is connected with the other end of the 5th resistance R 5, the end of the 4th filter capacitor C4 and the anode of the first rectifier diode D1, the negative electrode of the second voltage stabilizing didoe D2 connects, the other end of the other end of the 4th filter capacitor C4 and the 6th resistance R 6 connects, the other end of the 9th resistance R 9 is connected with the other end of the 6th filter capacitor C6, the end of thermistor NTC is connected with the negative electrode of the 3rd booster diode D3, one end of the other end of thermistor NTC and the 14 resistance R 14, the end of the 7th filter capacitor C7 connects, the other end of the 14 resistance R 14 is connected with the other end of the 15 resistance R 15, the other end of the 3rd resistance R 3, the other end of the first filter capacitor C1, the other end of the second filter capacitor C2, the other end of the 3rd filter capacitor C3, the other end of the 11 resistance R 11, the other end of the 12 resistance R 12, the other end of the 16 resistance R 16, the other end of the 17 resistance R 17, the other end of the 7th filter capacitor C7 is connected with earth terminal, the Vin termination is through the voltage behind the rectifying and wave-filtering, and the two ends of the 7th filter capacitor C7 are as output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317560 CN202696168U (en) | 2012-07-03 | 2012-07-03 | Active power factor correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317560 CN202696168U (en) | 2012-07-03 | 2012-07-03 | Active power factor correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696168U true CN202696168U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220317560 Withdrawn - After Issue CN202696168U (en) | 2012-07-03 | 2012-07-03 | Active power factor correcting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202696168U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738811A (en) * | 2012-07-03 | 2012-10-17 | 杭州电子科技大学 | Active power factor correction circuit |
-
2012
- 2012-07-03 CN CN 201220317560 patent/CN202696168U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738811A (en) * | 2012-07-03 | 2012-10-17 | 杭州电子科技大学 | Active power factor correction circuit |
| CN102738811B (en) * | 2012-07-03 | 2014-05-28 | 杭州电子科技大学 | Active power factor correction circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20140528 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20140528 |
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| RGAV | Abandon patent right to avoid regrant |