CN101860237B - High-power factor constant-current circuit and power source - Google Patents
High-power factor constant-current circuit and power source Download PDFInfo
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- CN101860237B CN101860237B CN201010189501.0A CN201010189501A CN101860237B CN 101860237 B CN101860237 B CN 101860237B CN 201010189501 A CN201010189501 A CN 201010189501A CN 101860237 B CN101860237 B CN 101860237B
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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
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- 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 invention is suitable for the field of power factor correction, and provides a high-power factor constant-current circuit and a power source. The high-power factor constant-current circuit comprises an electromagnetic compatible module, an input rectifying and filtering circuit, a power converting and power factor correcting circuit, an output rectifying and filtering circuit and a sampling and amplifying circuit. The electromagnetic compatible module is used for receiving the input of alternating current, inhibiting the conducted interference in the circuit and outputting the alternating current; the input rectifying and filtering circuit is used for rectifying the alternating current to be a pulse direct current; the power converting and power factor correcting circuit is used for carrying out power conversion and power factor correction on the pulse direct current according to a sampling feedback signal; the output rectifying and filtering circuit is used for rectifying and filtering the current output by the power converting and power factor correcting circuit to improve output waveform; and the sampling and amplifying circuit is used for sampling the voltage and the current output by the output rectifying and filtering circuit to output the sampling feedback signal. The invention realizes the output of the high-power factor constant current and reduces a primary power factor correcting circuit with simpleness, reliability and low cost.
Description
Technical field
The invention belongs to power factor correction field, relate in particular to a kind of constant current circuit with high power factor and power supply.
Background technology
In recent years, along with the development of electronic technology, some communication equipments such as computer are day by day universal, and are widely used in various field, and the problem the such as wherein harmonic pollution of electrical network and input power factor be low seems and becomes increasingly conspicuous.The inside of these equipment needs one alternating current is converted into galvanic power unit.In this transfer process, existence due to some non-linear elements, although it is sinusoidal causing the alternating voltage of input, but the alternating current of input seriously distorts, comprise a large amount of harmonic waves, not only reduce the power factor of input circuit, and public power system is produced and polluted, caused fault.Obviously, using effective alignment technique that harmonic pollution is controlled to less scope has been the task of top priority.
For Limited Current wave distortion and harmonic wave, make electromagnetic environment cleaner, the related standards of all having worked out Limited Current harmonic wave both at home and abroad, as IEC555-2, IEEC519, GB17625 etc.Power factor correction (PFC) technology that adopts modern HF power conversion technology is to solve the most effective means of harmonic pollution.In order to reduce the pollution of harmonic wave to AC network, this just must carry out power factor correction as the input circuit of UPS, high-frequency switch rectifying power supply etc. to power supply product, to reduce to greatest extent harmonic current.The object of power factor correction, adopts certain control method exactly, makes the input current of power supply follow the tracks of input voltage, and power factor is close to 1.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of constant current circuit with high power factor, can effectively reduce harmonic current, improves harmonic pollution and the input power factor of electrical network, and simple and reliable, cost is low.
The embodiment of the present invention is achieved in that a kind of constant current circuit with high power factor, and this constant current circuit with high power factor comprises:
Electromagnetic compatibility module, exchanges input, the conducted interference in limiting circuitry for receiving;
Input rectifying and filter circuit, for becoming pulsating direct current by the AC rectification of described electromagnetic compatibility module output;
Power conversion and circuit of power factor correction, for carrying out power conversion and power factor correction according to sampling feedback signal to described pulsating direct current;
Output rectification and filter circuit, for the electric current of described power conversion and circuit of power factor correction output is carried out to rectification and filtering, improve output waveform; And
Sampling and amplifying circuit, for the voltage and current of described output rectification and filter circuit output is sampled, feed back to described power conversion and circuit of power factor correction by sampling feedback signal;
Sampling and amplifying circuit comprise operational amplifier U3 and peripheral circuit, and described peripheral circuit comprises photoelectrical coupler U2A, resistance R 24～R40, capacitor C 16～C23, diode D5, D15, D16 and voltage-stabiliser tube Z2;
The pin 1 of operational amplifier U3 connects respectively one end of capacitor C 18, resistance R 30, one end of the other end connecting resistance R31 of capacitor C 18, the pin 2 of another termination operational amplifier U3 of resistance R 31, the negative electrode of resistance R 30 another terminating diode D15.The anode of diode D15 connects the anode of diode D16, and the negative electrode of diode D16 is connected with one end of resistance R 40, the pin 7 of another termination operational amplifier U3 of resistance R 40;
The pin 2 difference connecting resistance R29 of operational amplifier U3 and one end of capacitor C 19, the other end of resistance R 29 connects the output of output rectification and filter circuit, the pin 3 of another termination operational amplifier U3 of capacitor C 19 after connecting with resistance R 28;
The pin 2 of operational amplifier U3 is also connected with one end of resistance R 34, the other end ground connection of resistance R 34, and resistance R 35 is in parallel with resistance R 34;
The pin 3 of operational amplifier U3 is connected with one end of resistance R 32, the other end connecting resistance R24 of resistance R 32, the negative electrode of another terminating diode D5 of resistance R 24, the anode of diode D5 is connected with 7 ends of power conversion and circuit of power factor correction 3 medium/high frequency transformer TF1 second subprime coils;
The pin 3 of operational amplifier U3 is also connected with one end of resistance R 33, the pin 5 of another termination operational amplifier U3 of resistance R 33;
The pin 5 of operational amplifier U3 is connected with one end of capacitor C 23, the other end ground connection of capacitor C 23;
The pin 5 of operational amplifier U3 is also connected with one end of resistance R 36, the other end ground connection of resistance R 36, and resistance R 37 is in parallel with resistance R 36;
The pin 6 of operational amplifier U3 connects respectively one end of capacitor C 22, resistance R 38, resistance R 39, the other end ground connection of capacitor C 22, another termination output rectification of resistance R 38 and the output of filter circuit 4, another termination capacitor C 21 of resistance R 39, the pin 7 of another termination operational amplifier U3 of capacitor C 21;
The pin 8 of operational amplifier U3 connects one end of capacitor C 20, resistance R 26, the other end ground connection of capacitor C 20, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 26, the anode of voltage-stabiliser tube Z2 is one end of connecting resistance R27, capacitor C 16 respectively, the other end ground connection of resistance R 27, capacitor C 16;
The negative electrode of voltage-stabiliser tube Z2 connects respectively positive pole and the resistance R 25 of electrochemical capacitor C17, the minus earth of electrochemical capacitor C17, the other end of resistance R 25 is connected with the pin 1 of photoelectrical coupler U2A, and the pin 2 of photoelectrical coupler U2A connects the common anode contact of diode D15 and D16.
Another object of the embodiment of the present invention is to provide a kind of power supply, comprises above-mentioned constant current circuit with high power factor.
The constant current circuit with high power factor that the embodiment of the present invention provides adopts Power Factor Correction Control chip, form single-ended flyback topological circuit, can effectively reduce harmonic current, improve harmonic pollution and the input power factor of electrical network, realized high power factor constant current output, reduced one-level circuit of power factor correction (DC-DC), simple and reliable, cost is low simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the constant current circuit with high power factor that provides of the embodiment of the present invention;
Fig. 2 is the circuit structure diagram of electromagnetic compatibility module in constant current circuit with high power factor shown in Fig. 1;
Fig. 3 is the circuit structure diagram of input rectifying and filter circuit in constant current circuit with high power factor shown in Fig. 1;
Fig. 4 is the structure chart of power conversion and circuit of power factor correction in constant current circuit with high power factor shown in Fig. 1;
Fig. 5 exports the circuit structure diagram of rectification and filter circuit in constant current circuit with high power factor shown in Fig. 1;
Fig. 6 is sampling and the circuit structure diagram of amplifying circuit in constant current circuit with high power factor shown in Fig. 1.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention adopts take the single-ended flyback topological circuit that power conversion and circuit of power factor correction be core, realizes high power factor constant current output, has reduced one-level circuit of power factor correction (DC-DC).
Fig. 1 shows the circuit structure of the constant current circuit with high power factor that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
This circuit comprises electromagnetic compatibility module 1, input rectifying and filter circuit 2, power conversion and circuit of power factor correction 3, output rectification and filter circuit 4 and sampling and amplifying circuit 5.
Electromagnetic compatibility module 1 receives and exchanges input, the conducted interference in limiting circuitry.
Input rectifying and filter circuit 2 become pulsating direct current by the AC rectification of electromagnetic compatibility module 1 output.
Power conversion and circuit of power factor correction 3, according to the sampling feedback signal of sampling and amplifying circuit 5 outputs, carry out power conversion and power factor correction to the pulsating direct current of input rectifying and filter circuit 2 outputs.
The electric current of output rectification and 4 pairs of power conversions of filter circuit and circuit of power factor correction 3 outputs carries out rectification and filtering, improves output waveform, output direct current.
The voltage and current of 5 pairs of output rectifications of sampling and amplifying circuit and filter circuit 4 outputs samples, and sampling feedback signal is fed back to power conversion and circuit of power factor correction 3, thereby makes the output of exporting rectification and filter circuit 4 reach constant current constant voltage.
Fig. 2 is the structure that the embodiment of the present invention provides electromagnetic compatibility module in constant current circuit with high power factor, for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
Electromagnetic compatibility module 1 comprises resistance R 1, R2, differential mode capacitor CX2, differential mode filter inductance L1 and L1A, common mode capacitance CY1, CY2 and common mode inductance L2.
Alternating current entrance is connected to fuse F1, anti-lightning strike piezo-resistance VR1 and antisurge thermistor NTC.The L end that exchanges input passes through successively fuse F1, anti-lightning strike piezo-resistance VR1 and is connected with the N end that exchanges input after antisurge thermistor NTC.
The contact of fuse F1 and anti-lightning strike piezo-resistance VR1 is defined as La, and the contact of anti-lightning strike piezo-resistance VR1 and antisurge thermistor NTC is defined as Lb.
One end of differential mode filter inductance L1 is connected with a La, other end connecting resistance R1, and the other end of resistance R 1 is connected with resistance R 2, another termination differential mode filter inductance L1A of resistance R 2, the other end of differential mode filter inductance L1A is connected with a Lb.
The contact of differential mode filter inductance L1 and resistance R 1 is defined as Na, and the contact of differential mode filter inductance L1A and resistance R 2 is defined as Nb.
A termination Na point of differential mode capacitor CX2, another termination Nb point.
A termination Na point of common mode capacitance CY1, the other end is connected with common mode capacitor C Y2, another termination Nb point of common mode capacitance CY2, the contact ground connection of common mode capacitance CY1 and CY2.
Common mode inductance L2 comprises the first winding and the second winding, the first winding be connected on Na point and output 1. between, the second winding be connected on Nb point and output 2. between.
In electromagnetic compatibility module 1, differential mode filter inductance L1, L1A and differential mode capacitor CX2 be the differential mode interference in limiting circuitry effectively, common mode inductance L2 and common mode capacitance CY1, CY2 be the common mode disturbances in limiting circuitry effectively, thereby makes electromagnetic compatibility module 1 conducted interference in limiting circuitry effectively.
Fig. 3 shows the structure of input rectifying and filter circuit in the constant current circuit with high power factor that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
Input rectifying and filter circuit 2 comprise the bridge rectifier that 4 diodes form, capacitor C 1, C2 and inductance L 3.
In bridge rectifier the heteropole contact of diode respectively with the output of electromagnetic compatibility module 1 1., be 2. connected, common anode polar contact ground connection, common cathode contact is first by capacitor C 1 ground connection, again successively by inductance L 3 and capacitor C 2 ground connection, the contact of inductance L 3 and capacitor C 2 is the output of input rectifying and filter circuit 2, is made as 3. end.
In input rectifying and filter circuit 2, alternating current first becomes pulsating direct current after bridge rectifier, then circuit output after filtering.
Fig. 4 shows the structure of power conversion and circuit of power factor correction in the constant current circuit with high power factor that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
Power conversion and circuit of power factor correction 3 comprise control circuit 41, switching signal change-over circuit 42, high frequency transformer 43 and common mode capacitance CY3, wherein:
The sampling feedback signal of 41 pairs of receptions of control circuit is processed, and exports corresponding pwm control signal.
The pwm control signal that switching signal change-over circuit 42 sends according to control circuit 41, is converted into switch actuating signals by pwm control signal.
High frequency transformer 43 carries out energy storage and releases energy according to the switch actuating signals of switching signal change-over circuit 42 outputs, and output parameter is adjusted.
Common mode capacitance CY3 is for the common mode disturbances of limiting circuitry.
Control circuit 41 comprises Power Factor Correction Control chip U1 and peripheral module.
But Power Factor Correction Control chip U1 is a simple efficient power factor correction circuit, improved greatly the reliability of system, for example, adopted power factor correction chip SA7527, its built-in R/C filter, and carry current-sensing circuit, therefore do not need outside R/C filter.In addition also has special anti-breakdown circuit.Be applicable to electric ballast and volume required little, low in energy consumption, the high density power supply that peripheral components is few.In addition, the drive threshold of all right power-limiting metal-oxide-semiconductor of output driver clamp circuit.
The peripheral module of Power Factor Correction Control chip U1 comprises operating voltage module 411, error amplifier module 412 and driver output module 413, wherein:
Operating voltage module 411 provides operating voltage to Power Factor Correction Control chip U1.
Error amplifier module 412 receives sampling feedback signal, is transferred to Power Factor Correction Control chip U1 and processes.
Driver output module 413 produces Power Factor Correction Control chip U1 pwm control signal output according to sampling feedback signal.
Operating voltage module 411 comprises resistance R 8, R9 and R10, wherein:
High level HV+ arrives the pin 8 of Power Factor Correction Control chip U1 successively through resistance R 8, R9, R10.The pin 8 of Power Factor Correction Control chip U1 is operating voltage pin, through capacitor C 5 in parallel, is connected with common mode capacitor C Y3 with electrochemical capacitor C6 respectively, and the other end ground connection of common mode capacitance CY3.
Error amplifier module 412 comprises optocoupler PC1, resistance R 12, R13, R14, R15 and capacitor C 7, C8, wherein:
The sampling feedback signal that sampling and amplifying circuit 5 gather feeds back to control circuit 41 by optocoupler PC1.The pin 1 of Power Factor Correction Control chip U1 is error amplifier input pin, sampling feedback signal is passed through the pin 1 of optocoupler PC1 and resistance R 12 to Power Factor Correction Control chip U1 successively, one end of resistance R 12 is connected with the emitter of optocoupler PC1, and the other end connects the pin 1 of Power Factor Correction Control chip U1.
The pin 2 of Power Factor Correction Control chip U1 is error amplifier output pin, capacitor C 8, C7 are series between the pin 2 and pin 1 of Power Factor Correction Control chip U1, resistance R 13 is in parallel with capacitor C 8, after resistance R 14, R15 parallel connection, one end is connected with the ungrounded end of common mode capacitor C Y3, and the other end is connected with the emitter of optocoupler PC1.
Driver output module 413 comprises resistance R 18, R19, R20, R21, R22, diode D3 and capacitor C 9, wherein:
The negative electrode of diode D3 is connected with the pin 7 of Power Factor Correction Control chip U1, and anode is connected with the contact of resistance R 22 and R21.
One end of resistance R 20 is connected with the grid of metal-oxide-semiconductor Q1, and the other end is connected with the ungrounded end of common mode capacitor C Y3.
The pin 4 of Power Factor Correction Control chip U1 is PWM comparator input pin, and resistance R 19 is connected between the source electrode of metal-oxide-semiconductor Q1 and the pin 4 of Power Factor Correction Control chip U1.
One end of resistance R 18 is connected with the source electrode of metal-oxide-semiconductor Q1, and the other end is connected with the ungrounded end of common mode capacitor C Y3.
One end of capacitor C 9 is connected with the pin 4 of Power Factor Correction Control chip U1, and the other end is connected with the ungrounded end of common mode capacitor C Y3.
The pin 3 of Power Factor Correction Control chip U1 is multiplier input pin, high level HV+ arrives the pin 3 of Power Factor Correction Control chip U1 successively through resistance R 5, R6, R7, after resistance R 11 is in parallel with capacitor C 4, one end is connected with the pin 3 of Power Factor Correction Control chip U1, and the other end is connected with the ungrounded end of common mode capacitor C Y3.
The pin 5 of Power Factor Correction Control chip U1 is zero current detection input pin, through resistance R 16, be connected with 4 ends of high frequency transformer TF1, one end of resistance R 17 is connected with the pin 8 of Power Factor Correction Control chip U1, the other end is connected with the negative electrode of diode D2, and the anode of diode D2 is connected with 4 ends of high frequency transformer TF1.
The pin 6 of Power Factor Correction Control chip U1 is connected with the ungrounded end of common mode capacitor C Y3.
Switching signal change-over circuit 42 be take metal-oxide-semiconductor Q1 as core, wherein:
The drain electrode of metal-oxide-semiconductor Q1 connects the anode of diode D1, and the negative electrode of diode D1 meets high level HV+ successively after capacitor C 3 and resistance R 3, and resistance R 4 is connected between high level HV+ and the negative electrode of diode D1.
High frequency transformer 43 medium/high frequency transformer TF1 comprise the first primary coil, the second primary coil, the first secondary coil and second subprime coil, wherein:
The first primary coil comprises 1 end and 2 ends, 1 termination high level HV+, the drain electrode of metal-oxide-semiconductor Q1 in 2 termination switching signal change-over circuits 42.
The second primary coil comprises 3 ends and 4 ends, the anode of diode D2 in 3 termination control circuits 41, the ungrounded end of 4 termination common mode capacitance CY3.
The first secondary coil comprises 5 ends and 6 ends, connects output rectification and filter circuit 4.
Second subprime coil comprises 7 ends and 8 ends, 7 termination output rectification and filter circuit 4,8 end ground connection.
In foregoing circuit structure, the pin 1 of Power Factor Correction Control chip U1 receives the signal of sampling and amplifying circuit 5 feedbacks, pin 7 output pwm control signals are to the grid of metal-oxide-semiconductor Q1, control conducting and the turn-off time of metal-oxide-semiconductor Q1, the action of metal-oxide-semiconductor Q1 has determined that high frequency transformer TF1 is operated in energy storage state or the state that releases energy, thereby the output parameter of control circuit, so constantly sends control signal according to sampling feedback signal, thereby reaches the object that circuit output constant current constant voltage is controlled.
Fig. 5 shows the structure of exporting rectification and filter circuit in the constant current circuit with high power factor that the embodiment of the present invention provides, for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
The alternating current of output rectification and 4 pairs of inputs of filter circuit carries out rectification, and output ripple direct current, comprises resistance R 23, R41, R42, diode D4, and electrochemical capacitor C10, C11, C12, C13, C14, C15 and capacitor C 24, wherein:
The positive pole of electrochemical capacitor C10, C11, C12, C13, C14, C15 interconnects, and negative pole interconnects and ground connection.
Electrochemical capacitor C10 connects the negative electrode of diode D4, the anode of diode D4 connects 5 ends of transformer TF1 the first secondary coil and one end of resistance R 23 in power conversion and circuit of power factor correction 3, and the other end of resistance R 23 connects the positive pole of electrochemical capacitor C11 through capacitor C 9.
One end ground connection of resistance R 41, the other end is LED-, the positive pole of a termination capacitor C 15 of capacitor C 24, another termination LED-, a termination LED-of resistance R 42, the positive pole of another termination capacitor C 15, the just very LED+ of capacitor C 15, LED+ is 4. output, LED-is 5. output.
Fig. 6 illustrates the structure of sampling and amplifying circuit in the constant current circuit with high power factor that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
Sampling and amplifying circuit 5 comprise operational amplifier U3 and peripheral circuit, and described peripheral circuit comprises photoelectrical coupler U2A, resistance R 24～R40, capacitor C 16～C23, diode D5, D15, D16 and voltage-stabiliser tube Z2.
The pin 1 of operational amplifier U3 connects respectively one end of capacitor C 18, resistance R 30, one end of the other end connecting resistance R31 of capacitor C 18, the pin 2 of another termination operational amplifier U3 of resistance R 31, the negative electrode of resistance R 30 another terminating diode D15.The anode of diode D15 connects the anode of diode D16, and the negative electrode of diode D16 is connected with one end of resistance R 40, the pin 7 of another termination operational amplifier U3 of resistance R 40.
The pin 2 difference connecting resistance R29 of operational amplifier U3 and one end of capacitor C 19, the other end of resistance R 29 connects the 4. output of output rectification and filter circuit 4, the pin 3 of another termination operational amplifier U3 of capacitor C 19 after connecting with resistance R 28.
The pin 2 of operational amplifier U3 is also connected with one end of resistance R 34, the other end ground connection of resistance R 34, and resistance R 35 is in parallel with resistance R 34.
The pin 3 of operational amplifier U3 is connected with one end of resistance R 32, the other end connecting resistance R24 of resistance R 32, the negative electrode of another terminating diode D5 of resistance R 24, the anode of diode D5 is connected with 7 ends of power conversion and circuit of power factor correction 3 medium/high frequency transformer TF1 second subprime coils.
The pin 3 of operational amplifier U3 is also connected with one end of resistance R 33, the pin 5 of another termination operational amplifier U3 of resistance R 33.
The pin 5 of operational amplifier U3 is connected with one end of capacitor C 23, the other end ground connection of capacitor C 23.
The pin 5 of operational amplifier U3 is also connected with one end of resistance R 36, the other end ground connection of resistance R 36, and resistance R 37 is in parallel with resistance R 36.
The pin 6 of operational amplifier U3 connects respectively one end of capacitor C 22, resistance R 38, resistance R 39, the other end ground connection of capacitor C 22, another termination output rectification of resistance R 38 and the 5. output of filter circuit 4, another termination capacitor C 21 of resistance R 39, the pin 7 of another termination operational amplifier U3 of capacitor C 21.
The pin 8 of operational amplifier U3 connects one end of capacitor C 20, resistance R 26, the other end ground connection of capacitor C 20, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 26, the anode of voltage-stabiliser tube Z2 is one end of connecting resistance R27, capacitor C 16 respectively, the other end ground connection of resistance R 27, capacitor C 16.
The negative electrode of voltage-stabiliser tube Z2 connects respectively positive pole and the resistance R 25 of electrochemical capacitor C17, the minus earth of electrochemical capacitor C17, the other end of resistance R 25 is connected with the pin 1 of photoelectrical coupler U2A, and the pin 2 of photoelectrical coupler U2A connects the common anode contact of diode D15 and D16.
Operational amplifier U3 samples voltage and current, by photoelectrical coupler U2A, signal feedback is arrived to Power Factor Correction Control chip U1, and Power Factor Correction Control chip U1 regulates according to sampling feedback signal, thereby makes output reach constant current constant voltage.
The embodiment of the present invention can be applied in power supply product as UPS, in high-frequency switch rectifying power supply etc., can reduce to greatest extent harmonic current.
From the above, in the constant current circuit with high power factor providing in the embodiment of the present invention, electric main entrance is connected to fuse F1, antisurge thermistor VR1 and anti-lightning strike piezo-resistance NTC, and circuit is played a protective role.The conducted interference of electromagnetic compatibility module 1 in can limiting circuitry.Differential mode filter inductance L1, L1A and differential mode capacitor CX2 be the differential mode interference in limiting circuitry effectively, and common mode inductance L2 and common mode capacitance CY1, CY2 be the common mode disturbances in limiting circuitry effectively.
Input rectifying and the filter circuit 2 of the output of electromagnetic compatibility module 1 through being formed by 4 diodes, interchange is become to pulsating direct current, the single-ended flyback translation circuit of pulsating direct current through being formed by Power Factor Correction Control chip U1 and metal-oxide-semiconductor, high frequency transformer.Output samples voltage and current by operational amplifier U3, by photoelectrical coupler U2A by signal feedback to the pin 1 of Power Factor Correction Control chip U1, realize the adjusting to PWM duty ratio, thereby make output reach constant current constant voltage.
In addition, Power Factor Correction Control chip U1 also has the effect of power factor correction, in the time of in the scope at input AC civil power at 100V-240V, and PF > 0.9.
The constant current circuit with high power factor that the embodiment of the present invention provides adopts Power Factor Correction Control chip, form single-ended flyback topological circuit, can effectively reduce harmonic current, improve harmonic pollution and the input power factor of electrical network, realized high power factor constant current output, reduced one-level circuit of power factor correction (DC-DC), simple and reliable, cost is low simultaneously.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a constant current circuit with high power factor, is characterized in that, described constant current circuit with high power factor comprises:
Electromagnetic compatibility module, exchanges input, the conducted interference in limiting circuitry for receiving;
Input rectifying and filter circuit, for becoming pulsating direct current by the AC rectification of described electromagnetic compatibility module output;
Power conversion and circuit of power factor correction, for carrying out power conversion and power factor correction according to sampling feedback signal to described pulsating direct current;
Output rectification and filter circuit, for the electric current of described power conversion and circuit of power factor correction output is carried out to rectification and filtering, improve output waveform; And
Sampling and amplifying circuit, for the voltage and current of described output rectification and filter circuit output is sampled, feed back to described power conversion and circuit of power factor correction by sampling feedback signal;
Sampling and amplifying circuit comprise operational amplifier U3 and peripheral circuit, and described peripheral circuit comprises photoelectrical coupler U2A, resistance R 24～R40, capacitor C 16～C23, diode D5, D15, D16 and voltage-stabiliser tube Z2;
The pin 1 of operational amplifier U3 connects respectively one end of capacitor C 18, resistance R 30, one end of the other end connecting resistance R31 of capacitor C 18, the pin 2 of another termination operational amplifier U3 of resistance R 31, the negative electrode of resistance R 30 another terminating diode D15, the anode of diode D15 connects the anode of diode D16, the negative electrode of diode D16 is connected with one end of resistance R 40, the pin 7 of another termination operational amplifier U3 of resistance R 40;
The pin 2 difference connecting resistance R29 of operational amplifier U3 and one end of capacitor C 19, the other end of resistance R 29 connects the output of output rectification and filter circuit, the pin 3 of another termination operational amplifier U3 of capacitor C 19 after connecting with resistance R 28;
The pin 2 of operational amplifier U3 is also connected with one end of resistance R 34, the other end ground connection of resistance R 34, and resistance R 35 is in parallel with resistance R 34;
The pin 3 of operational amplifier U3 is connected with one end of resistance R 32, the other end connecting resistance R24 of resistance R 32, the negative electrode of another terminating diode D5 of resistance R 24, the anode of diode D5 is connected with 7 ends of power conversion and circuit of power factor correction medium/high frequency transformer second subprime coil;
The pin 3 of operational amplifier U3 is also connected with one end of resistance R 33, the pin 5 of another termination operational amplifier U3 of resistance R 33;
Pin 4 ground connection of operational amplifier U3;
The pin 5 of operational amplifier U3 is connected with one end of capacitor C 23, the other end ground connection of capacitor C 23;
The pin 5 of operational amplifier U3 is also connected with one end of resistance R 36, the other end ground connection of resistance R 36, and resistance R 37 is in parallel with resistance R 36;
The pin 6 of operational amplifier U3 connects respectively one end of capacitor C 22, resistance R 38, resistance R 39, the other end ground connection of capacitor C 22, another termination output rectification of resistance R 38 and the output of filter circuit, another termination capacitor C 21 of resistance R 39, the pin 7 of another termination operational amplifier U3 of capacitor C 21;
The pin 8 of operational amplifier U3 connects one end of capacitor C 20, resistance R 26, the other end ground connection of capacitor C 20, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 26, the anode of voltage-stabiliser tube Z2 is one end of connecting resistance R27, capacitor C 16 respectively, the other end ground connection of resistance R 27, capacitor C 16;
The negative electrode of voltage-stabiliser tube Z2 connects respectively positive pole and the resistance R 25 of electrochemical capacitor C17, the minus earth of electrochemical capacitor C17, the other end of resistance R 25 is connected with the pin 1 of photoelectrical coupler U2A, and the pin 2 of photoelectrical coupler U2A connects the common anode contact of diode D15 and D16.
2. constant current circuit with high power factor as claimed in claim 1, is characterized in that, described electromagnetic compatibility module adopts the differential mode interference in differential mode capacitor and differential mode filter inductance limiting circuitry, adopts the common mode disturbances in common mode capacitance and common mode inductance limiting circuitry.
3. constant current circuit with high power factor as claimed in claim 1, is characterized in that, described power conversion and circuit of power factor correction comprise:
Control circuit, for exporting corresponding pwm control signal according to described sampling feedback signal;
Switching signal change-over circuit, for being converted into switch actuating signals by described pwm control signal;
High frequency transformer, for carrying out energy storage and release energy according to described switch actuating signals, adjusts output parameter; And
Common mode capacitance CY3, for the common mode disturbances of limiting circuitry.
4. constant current circuit with high power factor as claimed in claim 3, is characterized in that, described control circuit comprises Power Factor Correction Control chip and a peripheral module;
Described peripheral module comprises:
Operating voltage module, for providing operating voltage to described Power Factor Correction Control chip;
Error amplifier module, for receiving described sampling feedback signal, is transferred to described Power Factor Correction Control chip and processes; And
Driver output module, the pwm control signal producing according to sampling feedback signal for exporting described Power Factor Correction Control chip.
5. constant current circuit with high power factor as claimed in claim 4, is characterized in that, described operating voltage module comprises resistance R 8, resistance R 9 and resistance R 10, wherein:
Described resistance R 8, R9, R10 are series between high level and the operating voltage pin of described Power Factor Correction Control chip successively.
6. constant current circuit with high power factor as claimed in claim 4, is characterized in that, described error amplifier module comprises optocoupler PC1, resistance R 12, R13, R14, R15 and capacitor C 7, C8, wherein:
One end of described resistance R 12 is connected with the emitter of described optocoupler PC1, the error amplifier input pin of Power Factor Correction Control chip described in another termination;
Described capacitor C 8, C7 are series between the error amplifier output pin and input pin of described Power Factor Correction Control chip;
Described resistance R 13 is in parallel with described capacitor C 8;
After described resistance R 14, R15 parallel connection, one end is connected with the ungrounded end of described common mode capacitance CY3, and the other end is connected with the emitter of described optocoupler PC1.
7. constant current circuit with high power factor as claimed in claim 4, is characterized in that, described switching signal change-over circuit includes metal-oxide-semiconductor Q1;
Described driver output module comprises resistance R 18, resistance R 19, resistance R 20, resistance R 21, resistance R 22, diode D3 and capacitor C 9, wherein:
Described resistance R 22, R21 are series between the driver output pin of described Power Factor Correction Control chip and the grid of metal-oxide-semiconductor Q1;
The negative electrode of described diode D3 is connected with the driver output pin of described Power Factor Correction Control chip, and anode is connected with the contact of described resistance R 22 and R21;
One end of described resistance R 20 is connected with the grid of described metal-oxide-semiconductor Q1, and the other end is connected with the ungrounded end of described common mode capacitance CY3;
Described resistance R 19 is connected between the source electrode of described metal-oxide-semiconductor Q1 and the PWM comparator input pin of described Power Factor Correction Control chip;
One end of described resistance R 18 is connected with the source electrode of described metal-oxide-semiconductor Q1, and the other end is connected with the ungrounded end of described common mode capacitance CY3;
Described capacitor C 9 one end are connected with the PWM comparator input pin of described Power Factor Correction Control chip, the ungrounded end of common mode capacitance CY3 described in another termination.
8. constant current circuit with high power factor as claimed in claim 7, is characterized in that, described switching signal change-over circuit further comprises diode D1, capacitor C 3, resistance R 3 and resistance R 4;
The drain electrode of described metal-oxide-semiconductor Q1 connects the anode of described diode D1, and the negative electrode of described diode D1 meets high level HV+ successively after described capacitor C 3 and described resistance R 3, and described resistance R 4 is connected between high level HV+ and the negative electrode of described diode D1.
9. a power supply, comprises constant current circuit with high power factor, it is characterized in that, described constant current circuit with high power factor is the constant current circuit with high power factor described in any one claim in claim 1 to 8.
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| 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 |
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| CN105281559B (en) * | 2015-11-27 | 2018-09-11 | 黄敏超 | A kind of electromagnetic interference inhibition structure and the electrical energy transformer with the structure |
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| CN105491758A (en) * | 2015-12-11 | 2016-04-13 | 中山市尊宝实业有限公司 | New energy-efficiency standard energy-saving circuit with high power factor and ultra-low stand-by power consumption |
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| CN109149964A (en) * | 2018-08-28 | 2019-01-04 | 中国北方发动机研究所(天津) | A kind of alternator for vehicle power rectifier circuit with over-current over-voltage protection function |
| CN109347319A (en) * | 2018-09-30 | 2019-02-15 | 惠州三华工业有限公司 | Efficient filtering circuit and power supply output system |
| CN112994805B (en) * | 2019-12-12 | 2022-08-23 | 北京铁路信号有限公司 | Power detection feedback circuit and antenna equipment system |
| CN110856316A (en) * | 2019-12-19 | 2020-02-28 | 福建省中科生物股份有限公司 | Plant lighting system and method for improving light utilization rate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6191564B1 (en) * | 1999-11-24 | 2001-02-20 | Lucent Technologies Inc. | Power factor correcting electrical converter apparatus |
| CN201234373Y (en) * | 2008-06-27 | 2009-05-06 | 深圳市德彩光电有限公司 | Series connection flyback converter applied on LED fluorescent lamp |
-
2010
- 2010-06-01 CN CN201010189501.0A patent/CN101860237B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6191564B1 (en) * | 1999-11-24 | 2001-02-20 | Lucent Technologies Inc. | Power factor correcting electrical converter apparatus |
| CN201234373Y (en) * | 2008-06-27 | 2009-05-06 | 深圳市德彩光电有限公司 | Series connection flyback converter applied on LED fluorescent lamp |
Non-Patent Citations (2)
| Title |
|---|
| 基于TOPSwitch-GX芯片的开关电源设计;梁凯等;《电源技术应用》;20070615;第10卷(第6期);第25页左栏第2段，图3 * |
| 梁凯等.基于TOPSwitch-GX芯片的开关电源设计.《电源技术应用》.2007,第10卷(第6期),第25页左栏第2段，图3. |
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