CN102075071A - Compensation control circuit beneficial to harmonic reduction of active flyback power factor correction device - Google Patents
Compensation control circuit beneficial to harmonic reduction of active flyback power factor correction device Download PDFInfo
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Abstract
The invention discloses a compensation control circuit beneficial to harmonic reduction of an active flyback power factor correction device. The flyback power factor correction device comprises an electro-magnetic interference (EMI) filter circuit F9, a rectifier filter circuit F10, a transformer T1, an absorbing circuit F11, a switch tube Q1, a primary inductive current sampling resistor R1, a diode D1, an output capacitor C1, an output current sampling resistor R2, an auxiliary reference power supply F12 and an auxiliary power supply F13, wherein the EMI filter circuit F9 is connected in parallel with an alternating current power supply; and the rectifier filter circuit F10 is connected with the output end of the EMI filter circuit. The compensation control circuit comprises a reference signal sampling circuit F1, a first operating circuit F2, a second operating circuit F3, a comparison circuit F4, a pulse width modulation (PWM) control and drive circuit F5, a current sampling circuit F6, an isolating circuit F7, an output sampling feedback circuit F8 and the like. The invention aims to solve the problem of input current distortion of the conventional flyback power factor correction device in a critical conduction mode during high voltage input and light loading.
Description
Technical field
The invention belongs to field of power electronics, relate to the active flyback power factor correcting circuit of single-stage, be specifically related to a kind of novel compensate control apparatus and control method that under high input voltage or underloading condition, effectively reduces Harmonics of Input.
Background technology
Since the nineties in last century, popularization along with the active power alignment technique, the whole world is more and more stricter for the regulation and the restriction of mains by harmonics electric current, for example the power supply of the electronic products such as the above personal computer of D class regulation 75W in the 61000-3-2 of the International Electrotechnical Commission harmonic standard will carry out capability correction, and the C class in 61000-3-2 harmonic standard regulation and standard GB 17625.1-2003 limit the harmonic current of all lighting apparatus of comprising the LED solid light source and done more strict regulation in addition.
Based on above requirement, the inverse-excitation type Active Power Factor Correction device of critical conduction mode (CRM) has obtained extensive use in middle low power occasion (below the 300W).CRM pattern stresses of parts is little than discontinuous mode, and has solved the diode reverse recovery problem under the continuous conduction mode.Compared to the boost power factor means for correcting, inverse-excitation type has the advantage that former secondary is isolated, low pressure is exported, and makes it need the application scenario of low pressure output very popular as LED illumination etc.
But the inverse-excitation type Active Power Factor Correction device of CRM pattern is owing to the discontinuous input current abnormality that causes of former limit inductive current, in wide region input voltage and the application scenario that needs variable load, the power supply of LED illuminating product that for example has the full voltage range of dimming function, when high pressure and underloading, can introduce a large amount of harmonic waves, cause whole power factor correction deleterious and can't satisfy the restriction of relevant regulation and harmonic wave.
At above problem, also do not propose any feasible effective solution at present, thereby become a big defective of the inverse-excitation type Active Power Factor Correction device of critical conduction mode.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of new compensating control method and circuit thereof, is intended to solve the input current abnormality problem of flyback power factor correcting device when high input voltage and underloading of existing critical conduction mode.
In order to solve the problems of the technologies described above, the invention provides a kind of compensation control circuit that active flyback power factor correcting device harmonic wave is cut down that is beneficial to, its flyback power factor correcting device comprises the EMI filter circuit F9 in parallel with AC power, be connected on the current rectifying and wave filtering circuit F10 of EMI filter circuit output, transformer T1, the absorption circuit F11 in parallel with the former limit TP1 of transformer, be connected on the switching tube Q1 on the former limit of transformer, be connected in the former limit inductive current sampling resistor R1 between switching tube Q1 source electrode and the former border district GND1, be connected on the diode D1 of transformer secondary TS1, be connected on the output capacitance C1 between main circuit positive output end and the secondary ground GND2, meet the output current sampling resistor R2 between main circuit negative output terminal and the secondary ground GND2, the accessory power supply F13 that is connected on the auxiliary reference power supply F12 at the auxiliary winding TS2 two ends of transformer and is connected on the secondary main winding TS3 of transformer two ends; Compensation control circuit comprises reference signal sample circuit F1, the first computing circuit F2, the second computing circuit F3, comparison circuit F4, PWM control and drive circuit F5, current sampling circuit F6, buffer circuit F7 and output sampling feedback circuit F8; Former limit inductive current reference signal sampled point is the tie point of rectification filter circuit output end and transformer T1 primary coil TP1 anode, the input of reference signal sample circuit F1 links to each other with the anode of the primary coil TP1 of transformer T1, the output of reference signal sample circuit F1 links to each other with the input of the first computing circuit F2, the input 1 of the output of the first computing circuit F2 and the second computing circuit F3 links to each other, another input 2 of second computing circuit links to each other with the signal end 3 of buffer circuit F7, the output of the second computing circuit F3 links to each other with the positive input terminal of comparison circuit F4, the negative input end of comparison circuit F4 links to each other with the output of current sampling circuit F6, the output of comparison circuit F4 links to each other with the input of PWM control and drive circuit F5, the output of PWM control and drive circuit F5 connects the gate pole of switching tube Q1, the input of current sampling circuit F6 links to each other with the source electrode of switching tube Q1, the positive input of output sampling feedback circuit F8 links to each other with the tie point of output current sampling resistor R2 and main circuit negative output terminal, the negative input of output sampling feedback circuit F8 links to each other with the output of auxiliary reference power supply F12, the output of output sampling feedback circuit F8 links to each other with the signal end 1 of buffer circuit F7, and the signal end 4 of buffer circuit F7 links to each other with the output of accessory power supply F13.
As the improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: reference signal sample circuit F1 comprises resistance R 3, R4, R5 and capacitor C 9, resistance R 3 one ends join with output and the transformer T1 primary coil TP1 anode of current rectifying and wave filtering circuit F10 respectively, the other end of resistance R 3 links to each other with an end of resistance R 4, the other end of resistance R 4 links to each other with an end of resistance R 5, capacitor C 9 respectively, and the other end of resistance R 5 is connected with former border district GND1 with the other end of capacitor C 9 respectively.
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: the first computing circuit F2 is multiplier U1, the differential input end X1 of multiplier U1 and resistance R 3, the tie point of R4 links to each other, the differential input end Y1 of multiplier U1 and resistance R 3, the tie point of R4 links to each other, the differential input end X2 of multiplier U1 is connected with former border district GND1 respectively with Y2, the former border district GND1 of negative supply power supply termination of U1, the high impedance summation input Z of multiplier U1 respectively with resistance R 4, the tie point of R5 links to each other, the positive power supply termination accessory power supply F13 output of multiplier U1, the output W of multiplier U1 i.e. the output of the second computing circuit F2.
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: the function of the second computing circuit F3, comparison circuit F4 and PWM control and drive circuit F5 realizes by control chip U2, comprises also that except that control chip U2 transformer assists winding TS4, diode D7 and some Resistor-Capacitor Units; The feedback voltage input of control chip U2 and capacitor C 8, one end of resistance R 10 links to each other, the signal end 3 of another termination buffer circuit F7 of resistance R 10, promptly the emitter with optocoupler U4 output phototriode U4B joins, the other end of capacitor C 8 links to each other with the internal multiplier input of control chip U2 and an end of resistance R 11 respectively, another input of control chip U2 internal multiplier and the output of the first computing circuit F2, the output that is multiplier U1 links to each other, the switching tube current sample end of control chip U2 links to each other with the output of current sampling circuit F6, the zero crossing test side of control chip U2 links to each other with an end of resistance R 13, the other end of resistance R 13 links to each other with the end of the auxiliary winding TS4 of transformer, the former border district GND1 of another termination of the auxiliary winding TS4 of transformer, the former border district of termination, reference ground of control chip U2, the negative electrode of the drive signal output terminating diode D7 of control chip U2, the anode of diode D7 connects the grid of switching tube Q1, resistance R 12 is connected to diode D7 two ends, the output of the power supply termination accessory power supply F13 of control chip U2.
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: current sampling circuit F6 comprises resistance R 14 and capacitor C 10; One end of resistance R 14 links to each other with the tie point of switching tube Q1 source electrode with former limit inductive current sampling resistor R1, the other end of resistance R 14 links to each other with the switching tube current sample end of control chip U2 and an end of capacitor C 10 respectively, and the other end of capacitor C 10 is connected with former border district GND1.
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: output sampling feedback circuit F8 comprises double operational chip U3, voltage-stabiliser tube ZD2, diode D8 and some Resistor-Capacitor Units; The in-phase input end of the amplifier U3A of double operational chip U3 links to each other with an end of resistance R 20 and an end of capacitor C 16 respectively, the other end of resistance R 20 links to each other with the tie point of output sampling resistor R2 and main circuit negative output terminal, another termination secondary ground GND2 of capacitor C 16, the inverting input of amplifier U3A links to each other with an end of resistance R 22, the other end of resistance R 22 links to each other with the output of resistance R 23 with amplifier U3A respectively, another termination secondary ground GND2 of resistance R 23, one end of resistance R 21 links to each other with the output of amplifier U3A, the other end respectively with the negative electrode of diode D8, one end of the in-phase output end of amplifier U3B and capacitor C 15 is connected, the anode of diode D8 links to each other with the anode of voltage-stabiliser tube ZD2, the negative electrode of voltage-stabiliser tube ZD2 links to each other with the positive output end of main circuit, and the other end of capacitor C 15 links to each other with secondary ground GND2; The inverting input of amplifier U3B links to each other with an end of resistance R 17, resistance R 18 and capacitor C 14 respectively, the output of the other end of resistance R 17 and auxiliary reference power supply F12 joins, resistance R 19 links to each other with the other end of resistance R 18, the other end of capacitor C 14 and the output of amplifier U3B respectively, and the signal end 1(that the other end of resistance R 19 (promptly exporting sampling feedback circuit F8 output) meets buffer circuit F7 is the anode of the photodiode U4A of optocoupler U4).
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: buffer circuit F7 comprises optocoupler U4, Y capacitor C Y and resistance R 9; The anode of the photodiode U4A of optocoupler U4 connects output sampling feedback circuit F8 output, the negative electrode of the photodiode U4A of optocoupler U4 meets secondary ground GND2, the former border district GND1 of Y capacitor C Y one termination, another termination secondary ground GND2, the collector electrode of the phototriode U4B of optocoupler U4 connects the output of accessory power supply F13, the end of the emitter connecting resistance R9 of the phototriode U4B of optocoupler U4, the former border district GND1 of another termination of resistance R 9.
As the further improvement that is beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave cuts down of the present invention: the multiplier U1 among the first computing circuit F2 is the AD633 chip.
The compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction of the present invention, its flyback power factor correcting device comprises the EMI filter circuit in parallel with the alternating current source input, be connected on the current rectifying and wave filtering circuit of EMI filter circuit output, transformer, the absorption circuit in parallel with the former limit of transformer, be connected on the switching tube on the former limit of transformer, be connected in the former limit inductive current sampling resistor between switching tube source electrode and the former border district GND1, be connected on the diode of transformer secondary, be connected on the output capacitance between main circuit positive output end and the secondary ground, connect the output current sampling resistor on main circuit negative output terminal and secondary ground, be connected on the auxiliary reference power supply of the transformer second auxiliary winding, and the accessory power supply that is connected on transformer the 3rd auxiliary winding two ends.Compensation control circuit comprises reference signal sample circuit, first computing circuit, second computing circuit, comparison circuit, PWM control and drive circuit, current sampling circuit, buffer circuit and output sampling feedback circuit.Former limit inductive current reference signal sampled point is the tie point of rectification filter circuit output end and transformer primary coil anode, the input of reference signal sample circuit links to each other with the anode of the primary coil of transformer, the output of reference signal sample circuit links to each other with the input of first computing circuit, the output of first computing circuit links to each other with the input of second computing circuit, another input of second computing circuit links to each other with No. three signal ends of buffer circuit, the output of second computing circuit links to each other with the positive input terminal of comparison circuit, the negative input end of comparison circuit links to each other with the output of current sampling circuit, the output of comparison circuit links to each other with the input of PWM control and drive circuit, the output of PWM control and drive circuit connects the gate pole of switching tube, the input of current sampling circuit links to each other with the source electrode of switching tube, the positive input of output sampling feedback circuit links to each other with the tie point of output current sampling resistor and negative output terminal, the negative input of output sampling feedback circuit links to each other with the output of auxiliary reference power supply, the output of output sampling feedback circuit links to each other with a signal end of buffer circuit, and No. four signal ends of buffer circuit link to each other with the output of accessory power supply.
Compared to traditional compensation control circuit, the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction among the present invention has injected sinusoidal square amount in the inductive current reference signal of former limit, help the reduction of low-order harmonic in the input current, the operation principle of its compensation control circuit is: the rectified voltage signal of rectification filter circuit output end, produce the sinusoidal rectified voltage signal of two different amplitudes through the reference signal sample circuit, a square amount that obtains sinusoidal rectified signal through two input inputs of multiplier, square amount of sinusoidal rectified signal obtains the first computing circuit output signal through adder and another sinusoidal rectified signal addition, the output feedback signal that the main circuit output signal obtains behind output sampling feedback circuit and buffer circuit, the first computing circuit output signal and output feedback signal multiply each other through multiplier and obtain former limit inductive current reference signal, with the current sampling circuit former limit inductive current of sampling, compare through comparison circuit and former limit inductive current reference signal, control the work of the pipe that opens the light by the result of comparison circuit output by PWM control and drive circuit.By in traditional former limit inductive current reference signal, injecting square amount of sinusoidal rectified signal, help reducing the low-order harmonic in the input current when high input voltage and underloading.
Main feature of the present invention is: injected square amount of sinusoidal rectified signal in the sampled value of the sinusoidal rectified signal of line voltage, as the reference signal of former limit inductive current.The use of this reference quantity helps improving the input current crest place distortion that the active flyback power factor correcting device of critical conduction mode exists, and higher and circuit underloading is to obtain stronger embodiment to its validity at line voltage.Help the active flyback power factor correcting device of critical conduction mode in full input voltage range with under the variable load situation, to satisfy relevant power network current harmonic wave regulation.
Compared to traditional control method, another characteristics of the present invention are to have realized the improvement of control method by the increase of a multiplier and adder, and the Harmonics of Input component of Xiao Jianing simply is easy to realize effectively, reliability validity height is with a wide range of applications.
Description of drawings
Fig. 1 is a kind of control principle block diagram that is beneficial to the compensation control circuit of active flyback power factor correcting device harmonic wave reduction.
Fig. 2 is that compensation control circuit control signal of the present invention produces schematic diagram.
Fig. 3 is a kind of concrete enforcement circuit diagram that is beneficial to the compensation control circuit of active flyback power factor correcting device harmonic wave reduction.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
With reference to Fig. 1, a kind of compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction, its flyback power factor correcting device comprises the fuse FS that is connected on the alternating current source input, the EMI filter circuit F9 in parallel with input, be connected on the current rectifying and wave filtering circuit F10 of EMI filter circuit output, transformer T1, the absorption circuit F11 in parallel with the former limit TP1 of transformer, be connected on the switching tube Q1 on the former limit of transformer, be connected in the former limit inductive current sampling resistor R1 between switching tube Q1 source electrode and the former border district GND1, be connected on the diode D1 of transformer secondary TS1, be connected on the output capacitance C1 between positive output end and the secondary ground GND2, meet the output current sampling resistor R2 of negative output terminal and secondary ground GND2, be connected on the auxiliary reference power supply F12 of the auxiliary winding TS2 of transformer, and the accessory power supply F13 that is connected on the secondary main winding TS3 of transformer two ends.
Compensation control circuit comprises reference signal sample circuit F1, the first computing circuit F2, the second computing circuit F3, comparison circuit F4, PWM control and drive circuit F5, current sampling circuit F6, buffer circuit F7 and output sampling feedback circuit F8.Former limit inductive current reference signal sampled point is the tie point of rectification filter circuit output end and transformer T1 primary coil TP1 anode, the input of reference signal sample circuit F1 links to each other with the anode of the primary coil TP1 of transformer T1, the output of reference signal sample circuit F1 links to each other with the input of the first computing circuit F2, the input 1 of the output of the first computing circuit F2 and the second computing circuit F3 links to each other, another input 2 of second computing circuit links to each other with the signal end 3 of buffer circuit F7, the output of the second computing circuit F3 links to each other with the positive input terminal of comparison circuit F4, the negative input end of comparison circuit F4 links to each other with the output of current sampling circuit F6, the output of comparison circuit F4 links to each other with the input of PWM control and drive circuit F5, the output of PWM control and drive circuit F5 connects the gate pole of switching tube Q1, the input of current sampling circuit F6 links to each other with the source electrode of switching tube Q1, the positive input of output sampling feedback circuit F8 links to each other with the tie point of output current sampling resistor R2 and negative output terminal, the negative input of output sampling feedback circuit F8 links to each other with the output of auxiliary reference power supply F12, the output of output sampling feedback circuit F8 links to each other with the signal end 1 of buffer circuit F7, and the signal end 4 of buffer circuit F7 links to each other with the output of accessory power supply F13.
Fig. 3 is a kind of specific embodiment circuit diagram that is beneficial to the compensation control circuit of active flyback power factor correcting device harmonic wave reduction.In the legend: reference signal sample circuit F1 comprises resistance R 3, R4, R5 and capacitor C 9, the tie point of the output of resistance R 1 one ends and current rectifying and wave filtering circuit F10 and transformer T1 primary coil TP1 anode joins, the other end of resistance R 3 links to each other with an end of resistance R 4, the other end of resistance R 4 links to each other with an end of resistance R 5, capacitor C 9, and the other end of the other end of resistance R 5 and capacitor C 9 is connected with former border district GND1.
The first computing circuit F2 is multiplier U1, differential input end X1, the Y1 of multiplier U1 links to each other with the tie point of resistance R 3, R4, the differential input end X2 of multiplier U1 is connected with former border district GND1 with Y2, the negative supply feeder ear of U1 also meets former border district GND1, the high impedance summation input Z of multiplier U1 links to each other with the tie point of resistance R 4, R5, the positive power supply termination accessory power supply F13 output of multiplier U1, the output W of multiplier U1 i.e. the output of the second computing circuit F2.
The function of the second computing circuit F3, comparison circuit F4 and PWM control and drive circuit F5 realizes by control chip U2, comprises that also transformer assists winding TS4, diode D7 and some Resistor-Capacitor Units.The feedback voltage input of control chip U2 and capacitor C 8, one end of resistance R 10 links to each other, the signal end 3 of another termination buffer circuit F7 of resistance R 10, promptly the emitter with optocoupler U4 output phototriode U4B joins, the other end of capacitor C 8 links to each other with the internal multiplier input of control chip U2 and an end of resistance R 11, another input of control chip U2 internal multiplier and the output of the first computing circuit F2, the output that is multiplier U1 links to each other, the switching tube current sample end of control chip U2 links to each other with the output of current sampling circuit F6, the zero crossing test side of control chip U2 links to each other with an end of resistance R 13, the other end of resistance R 13 links to each other with the end of the auxiliary winding TS4 of transformer, the former border district GND1 of another termination of the auxiliary winding TS4 of transformer, the former border district of termination, reference ground of control chip U2, the negative electrode of the drive signal output terminating diode D7 of control chip U2, the anode of diode D7 connects the grid of switching tube Q1, resistance R 12 is connected to diode D7 two ends, the output of the power supply termination accessory power supply F13 of control chip U2.
Current sampling circuit F6 comprises resistance R 14 and capacitor C 10.One end of resistance R 14 links to each other with the tie point of switching tube Q1 source electrode with former limit inductive current sampling resistor R1, the other end of resistance R 14 links to each other with the switching tube current sample end of control chip U2, an end of capacitor C 10, and the other end of capacitor C 10 is connected with former border district GND1.
Output sampling feedback circuit F8 comprises double operational chip U3, voltage-stabiliser tube ZD2, diode D8 and some Resistor-Capacitor Units.The in-phase input end of the amplifier U3A of double operational chip U3 links to each other with an end of an end of resistance R 20 and capacitor C 16, link to each other with the tie point of output sampling resistor R2 and main circuit negative output terminal another termination secondary ground GND2 of capacitor C 16 of the other end of resistance R 20, the inverting input of amplifier U3A links to each other with an end of resistance R 22, the other end of resistance R 22 links to each other with the output of resistance R 23 and amplifier U3A, another termination secondary ground GND2 of resistance R 23, one end of resistance R 21 links to each other with the output of amplifier U3A, the negative electrode of the other end and diode D8, one end of the in-phase output end of amplifier U3B and capacitor C 15 is connected, the anode of diode D8 links to each other with the model machine of voltage-stabiliser tube ZD2, the negative electrode of voltage-stabiliser tube ZD2 links to each other with the positive output end of main circuit, and the other end of capacitor C 15 links to each other with secondary ground GND2.The inverting input of amplifier U3B links to each other with an end of resistance R 17, resistance R 18 and capacitor C 14, the output of the other end of resistance R 17 and auxiliary reference power supply F12 joins, resistance R 19 links to each other with the other end of resistance R 18, the other end of capacitor C 14 and the output of amplifier U3B, the other end of resistance R 19, promptly export the signal end 1 of sampling feedback circuit F8 output termination buffer circuit F7, i.e. the anode of the photodiode U4A of optocoupler U4.
Buffer circuit F7 comprises optocoupler U4, Y capacitor C Y and resistance R 9.The anode of the photodiode U4A of optocoupler U4 connects output sampling feedback circuit F8 output, the negative electrode of the photodiode U4A of optocoupler U4 meets secondary ground GND2, the former border district GND1 of Y capacitor C Y one termination, another termination secondary ground GND2, the collector electrode of the phototriode U4B of optocoupler U4 connects the output of accessory power supply F13, the end of the emitter connecting resistance R9 of the phototriode U4B of optocoupler U4, the former border district GND1 of another termination of resistance R 9.
In specific embodiment, multiplier U1 selects AD633 for use, and control chip is selected L6561 for use,, the double operational chip is selected LM358 for use, and optocoupler U4 selects PC817 for use, and switching tube Q1 selects MOSFET for use.
The former limit inductive current reference signal of the control method of the active flyback power factor correcting device of tradition is a sinusoidal signal, the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction among the present invention has injected sinusoidal square amount in the inductive current reference signal of former limit, help the reduction of low-order harmonic in the input current, the operation principle of compensation control circuit (control signal produces schematic diagram as shown in Figure 2):
Reference signal sample circuit F1 input is received current rectifying and wave filtering circuit F10 output, sampling rectified voltage signal S1, through resistance R 3, R4 and R5 dividing potential drop, produce the sinusoidal rectified voltage signal S2 and the S3 of two different amplitudes, S2 obtains square amount S4 of sinusoidal rectified voltage signal through two input inputs of multiplier, S4 obtains the output signal S5 of the first computing circuit F2 through adder and another sinusoidal rectified voltage signal S3 addition, the output feedback signal of S6 for behind output sampling feedback circuit and buffer circuit, obtaining, S5 and output feedback signal S6 multiply each other through multiplier and obtain former limit inductive current reference signal S7, with the current sampling circuit F6 former limit inductor current signal S8 that samples, compare through comparison circuit F4 and former limit inductive current reference signal S7, the control signal S9 that is exported by comparison circuit F4 produces the work that pwm signal S10 controls the pipe Q1 that opens the light by PWM control and drive circuit F5.Square amount S4 that injects sinusoidal rectified signal in sinusoidal rectified signal S3 helps reducing the low-order harmonic of input current when high input voltage and underloading, improve peak distortion, help the active flyback power factor correcting device of critical conduction mode in full input voltage range with under the variable load situation, to satisfy relevant power network current harmonic wave regulation.
What more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (8)
1. be beneficial to the compensation control circuit that active flyback power factor correcting device harmonic wave is cut down, its flyback power factor correcting device comprises the EMI filter circuit F9 in parallel with AC power, be connected on the current rectifying and wave filtering circuit F10 of EMI filter circuit output, transformer T1, the absorption circuit F11 in parallel with the former limit TP1 of transformer, be connected on the switching tube Q1 on the former limit of transformer, be connected in the former limit inductive current sampling resistor R1 between switching tube Q1 source electrode and the former border district GND1, be connected on the diode D1 of transformer secondary TS1, be connected on the output capacitance C1 between main circuit positive output end and the secondary ground GND2, meet the output current sampling resistor R2 between main circuit negative output terminal and the secondary ground GND2, the accessory power supply F13 that is connected on the auxiliary reference power supply F12 at the auxiliary winding TS2 two ends of transformer and is connected on the secondary main winding TS3 of transformer two ends; It is characterized in that: compensation control circuit comprises reference signal sample circuit F1, the first computing circuit F2, the second computing circuit F3, comparison circuit F4, PWM control and drive circuit F5, current sampling circuit F6, buffer circuit F7 and output sampling feedback circuit F8; Former limit inductive current reference signal sampled point is the tie point of rectification filter circuit output end and transformer T1 primary coil TP1 anode, the input of reference signal sample circuit F1 links to each other with the anode of the primary coil TP1 of transformer T1, the output of reference signal sample circuit F1 links to each other with the input of the first computing circuit F2, the input 1 of the output of the first computing circuit F2 and the second computing circuit F3 links to each other, another input 2 of second computing circuit links to each other with the signal end 3 of buffer circuit F7, the output of the second computing circuit F3 links to each other with the positive input terminal of comparison circuit F4, the negative input end of comparison circuit F4 links to each other with the output of current sampling circuit F6, the output of comparison circuit F4 links to each other with the input of PWM control and drive circuit F5, the output of PWM control and drive circuit F5 connects the gate pole of switching tube Q1, the input of current sampling circuit F6 links to each other with the source electrode of switching tube Q1, the positive input of output sampling feedback circuit F8 links to each other with the tie point of output current sampling resistor R2 and main circuit negative output terminal, the negative input of output sampling feedback circuit F8 links to each other with the output of auxiliary reference power supply F12, the output of output sampling feedback circuit F8 links to each other with the signal end 1 of buffer circuit F7, and the signal end 4 of buffer circuit F7 links to each other with the output of accessory power supply F13.
2. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 1, it is characterized in that: reference signal sample circuit F1 comprises resistance R 3, R4, R5 and capacitor C 9, resistance R 3 one ends join with output and the transformer T1 primary coil TP1 anode of current rectifying and wave filtering circuit F10 respectively, the other end of resistance R 3 links to each other with an end of resistance R 4, the other end of resistance R 4 links to each other with an end of resistance R 5, capacitor C 9 respectively, and the other end of resistance R 5 is connected with former border district GND1 with the other end of capacitor C 9 respectively.
3. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 2, it is characterized in that: the first computing circuit F2 is multiplier U1, the differential input end X1 of multiplier U1 and resistance R 3, the tie point of R4 links to each other, the differential input end Y1 of multiplier U1 and resistance R 3, the tie point of R4 links to each other, the differential input end X2 of multiplier U1 is connected with former border district GND1 respectively with Y2, the former border district GND1 of negative supply power supply termination of U1, the high impedance summation input Z of multiplier U1 respectively with resistance R 4, the tie point of R5 links to each other, the positive power supply termination accessory power supply F13 output of multiplier U1, the output W of multiplier U1 i.e. the output of the second computing circuit F2.
4. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 3, it is characterized in that: the function of the second computing circuit F3, comparison circuit F4 and PWM control and drive circuit F5 realizes by control chip U2, comprises also that except that control chip U2 transformer assists winding TS4, diode D7 and some Resistor-Capacitor Units; The feedback voltage input of control chip U2 and capacitor C 8, one end of resistance R 10 links to each other, the signal end 3 of another termination buffer circuit F7 of resistance R 10, promptly the emitter with optocoupler U4 output phototriode U4B joins, the other end of capacitor C 8 links to each other with the internal multiplier input of control chip U2 and an end of resistance R 11 respectively, another input of control chip U2 internal multiplier and the output of the first computing circuit F2, the output that is multiplier U1 links to each other, the switching tube current sample end of control chip U2 links to each other with the output of current sampling circuit F6, the zero crossing test side of control chip U2 links to each other with an end of resistance R 13, the other end of resistance R 13 links to each other with the end of the auxiliary winding TS4 of transformer, the former border district GND1 of another termination of the auxiliary winding TS4 of transformer, the former border district of termination, reference ground of control chip U2, the negative electrode of the drive signal output terminating diode D7 of control chip U2, the anode of diode D7 connects the grid of switching tube Q1, resistance R 12 is connected to diode D7 two ends, the output of the power supply termination accessory power supply F13 of control chip U2.
5. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 4, it is characterized in that: current sampling circuit F6 comprises resistance R 14 and capacitor C 10; One end of resistance R 14 links to each other with the tie point of switching tube Q1 source electrode with former limit inductive current sampling resistor R1, the other end of resistance R 14 links to each other with the switching tube current sample end of control chip U2 and an end of capacitor C 10 respectively, and the other end of capacitor C 10 is connected with former border district GND1.
6. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 5 is characterized in that: output sampling feedback circuit F8 comprises double operational chip U3, voltage-stabiliser tube ZD2, diode D8 and some Resistor-Capacitor Units; The in-phase input end of the amplifier U3A of double operational chip U3 links to each other with an end of resistance R 20 and an end of capacitor C 16 respectively, the other end of resistance R 20 links to each other with the tie point of output sampling resistor R2 and main circuit negative output terminal, another termination secondary ground GND2 of capacitor C 16, the inverting input of amplifier U3A links to each other with an end of resistance R 22, the other end of resistance R 22 links to each other with the output of resistance R 23 with amplifier U3A respectively, another termination secondary ground GND2 of resistance R 23, one end of resistance R 21 links to each other with the output of amplifier U3A, the other end respectively with the negative electrode of diode D8, one end of the in-phase output end of amplifier U3B and capacitor C 15 is connected, the anode of diode D8 links to each other with the anode of voltage-stabiliser tube ZD2, the negative electrode of voltage-stabiliser tube ZD2 links to each other with the positive output end of main circuit, and the other end of capacitor C 15 links to each other with secondary ground GND2; The inverting input of amplifier U3B links to each other with an end of resistance R 17, resistance R 18 and capacitor C 14 respectively, the output of the other end of resistance R 17 and auxiliary reference power supply F12 joins, resistance R 19 links to each other with the other end of resistance R 18, the other end of capacitor C 14 and the output of amplifier U3B respectively, the signal end 1 of another termination buffer circuit F7 of resistance R 19.
7. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 6, it is characterized in that: buffer circuit F7 comprises optocoupler U4, Y capacitor C Y and resistance R 9; The anode of the photodiode U4A of optocoupler U4 connects output sampling feedback circuit F8 output, the negative electrode of the photodiode U4A of optocoupler U4 meets secondary ground GND2, the former border district GND1 of Y capacitor C Y one termination, another termination secondary ground GND2, the collector electrode of the phototriode U4B of optocoupler U4 connects the output of accessory power supply F13, the end of the emitter connecting resistance R9 of the phototriode U4B of optocoupler U4, the former border district GND1 of another termination of resistance R 9.
8. the compensation control circuit that is beneficial to active flyback power factor correcting device harmonic wave reduction according to claim 7, it is characterized in that: the multiplier U1 among the first computing circuit F2 is the AD633 chip.
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Cited By (9)
| 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 |
| CN102983718A (en) * | 2012-11-30 | 2013-03-20 | 西安智海电力科技有限公司 | Power supply converting circuit capable of supporting various input waveforms |
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| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
| WO2015081630A1 (en) * | 2013-12-06 | 2015-06-11 | 深圳市华星光电技术有限公司 | Flyback quick start driving circuit and driving method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10242326A1 (en) * | 2002-09-12 | 2004-03-18 | Tridonicatco Gmbh & Co. Kg | Electronic ballast with power factor compensation/correction (PFC) for discharge lamps and method for reducing harmonics during operation of such ballast, with specified capacitor (dis)charging |
| US20080310201A1 (en) * | 2007-06-15 | 2008-12-18 | The Regents Of The University Of Colorado | Digital Power Factor Correction |
| CN101777770A (en) * | 2010-02-12 | 2010-07-14 | 浙江大学 | Control circuit for voltage dropping type power factor corrector |
| CN101834539A (en) * | 2010-05-27 | 2010-09-15 | 浙江大学 | High-efficiency AC/DC combined converter with wide output voltage range |
| CN201937459U (en) * | 2011-01-20 | 2011-08-17 | 浙江大学 | Compensation control circuit beneficial to harmonic reduction of active flyback type power factor corrector |
-
2011
- 2011-01-20 CN CN 201110022625 patent/CN102075071B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10242326A1 (en) * | 2002-09-12 | 2004-03-18 | Tridonicatco Gmbh & Co. Kg | Electronic ballast with power factor compensation/correction (PFC) for discharge lamps and method for reducing harmonics during operation of such ballast, with specified capacitor (dis)charging |
| US20080310201A1 (en) * | 2007-06-15 | 2008-12-18 | The Regents Of The University Of Colorado | Digital Power Factor Correction |
| CN101777770A (en) * | 2010-02-12 | 2010-07-14 | 浙江大学 | Control circuit for voltage dropping type power factor corrector |
| CN101834539A (en) * | 2010-05-27 | 2010-09-15 | 浙江大学 | High-efficiency AC/DC combined converter with wide output voltage range |
| CN201937459U (en) * | 2011-01-20 | 2011-08-17 | 浙江大学 | Compensation control circuit beneficial to harmonic reduction of active flyback type power factor corrector |
Non-Patent Citations (1)
| Title |
|---|
| 《Energy Conversion Congress and Exposition (ECCE), 2010 IEEE 》 20101101 Yuanyuan Wang等 An improved control strategy based on multiplier for CRM flyback PFC to reduce line current peak distortion , * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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 |
| CN102983718B (en) * | 2012-11-30 | 2016-06-08 | 西安智海电力科技有限公司 | The power-switching circuit of multiple input waveform can be supported |
| CN102983718A (en) * | 2012-11-30 | 2013-03-20 | 西安智海电力科技有限公司 | Power supply converting circuit capable of supporting various input waveforms |
| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
| GB2534816A (en) * | 2013-12-06 | 2016-08-03 | Shenzhen China Star Optoelect | Flyback quick start driving circuit and driving method |
| WO2015081630A1 (en) * | 2013-12-06 | 2015-06-11 | 深圳市华星光电技术有限公司 | Flyback quick start driving circuit and driving method |
| GB2534816B (en) * | 2013-12-06 | 2021-03-03 | Shenzhen China Star Optoelect | Flyback quick start driving circuit and driving method |
| CN111865116A (en) * | 2019-04-26 | 2020-10-30 | 南京理工大学 | Variable inductance-based constant switching frequency CRM boost converter |
| CN111865116B (en) * | 2019-04-26 | 2022-07-22 | 南京理工大学 | CRM boost converter with constant switching frequency based on variable inductor |
| CN110165897A (en) * | 2019-05-28 | 2019-08-23 | 矽力杰半导体技术(杭州)有限公司 | Control circuit, control method and isolated converter |
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| CN111141949A (en) * | 2020-02-12 | 2020-05-12 | 东南大学 | Alternating voltage sampling circuit for output power control and design method thereof |
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