CN102624255B - Monocycle pulse width modulation (PWM) method and modulator for power factor correction - Google Patents
Monocycle pulse width modulation (PWM) method and modulator for power factor correction Download PDFInfo
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- CN102624255B CN102624255B CN201210094164.6A CN201210094164A CN102624255B CN 102624255 B CN102624255 B CN 102624255B CN 201210094164 A CN201210094164 A CN 201210094164A CN 102624255 B CN102624255 B CN 102624255B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention provides a monocycle pulse width modulation (PWM) method for power factor correction. The method comprises the following steps of: amplifying a voltage error between sampled voltage and reference voltage; integrating and regularly resetting the amplified voltage error to obtain sawtooth voltage; performing inverting operation on the sawtooth voltage by taking the average level of the sawtooth voltage as a reference level to obtain sawtooth waves, wherein the sawtooth waves take sawtooth wave peak amplitude as a bottom, teeth of the sawtooth waves are downward, and tooth tops of the sawtooth waves reach zero; and comparing the sawtooth waves with a control reference quantity to obtain required pulse width modulated waves. The invention also provides a monocycle pulse width modulator (PWM) for the power factor correction. The monocycle PWM comprises an error amplifier, an integrator, a resetting clock signal generator, a comparator and a low-pass filter. The average level of the sawtooth voltage is taken as the reference level, so that the PWM can work at any required frequency without taking the matching of integration parameters of the integrator, and the influence of temperature characteristics of components is completely avoided.
Description
Technical field
The present invention relates to the A.C.-D.C. converter field of electrical energy changer, be specifically related to a kind of monocycle PWM modulator approach and modulator for power factor correction.
Background technology
Be accompanied by the extensive use of power electronic technology, the harm of harmonic pollution in electric power net more and more causes people's concern, also more and more higher to the requirement of the input power factor of electrical energy changer (PF) and input current total harmonic distortion (THD).Therefore, the power factor correction technology of power consumption equipment is the problem that industry is extremely paid close attention to always.Monocycle technology is the non-linear large-signal PWM control technology growing up a kind of nineties, and it makes the mean value of switching variable in each switch periods be proportional to control reference quantity by the duty ratio of control switch.One-cycle control is applied to power factor correction, there are a lot of advantages with respect to traditional control technology, this control method has been cancelled the multiplier in traditional control method, makes that control circuit is succinct, dynamic response is fast, good stability is easy to realize, and is a kind of good control method.
With reference to figure 1, the monocycle governing equation of single-phase power factor correcting is: R
s* I
in=V
m* (1-d), R in formula
sfor input current sample resistance, I
infor input current, V
mfor the error signal after amplifying, the duty ratio that d is control switch, the function of the part on formula the right is PWM modulator.The implementation of existing single-phase monocycle power factor alignment technique PWM modulator is: output voltage, after sampling, is together sent into error amplifier with reference data, and the output of error amplifier is sent into subtracter as the input of integrator simultaneously; The reset terminal that reset clock pulse signal is sent into integrator is sent into the S end of rest-set flip-flop simultaneously, and integrator and reset clock signal generator form the function of saw-toothed wave generator; The output of subtracter is sent into comparator and is compared with the control reference quantity on the formula left side, and the R end of rest-set flip-flop is sent in the output of comparator, obtains required PWM export by the Q end of rest-set flip-flop, and its operation principle schematic block diagram refers to Fig. 2.
For this existing implementation, analyze, circuit from this scheme, the integrator of this circuit is in the maximum of a clock cycle integral voltage, the maximum that is sawtooth waveforms must strictly equate with the value of the output Vm of error amplifier, like this could be when duty ratio d value be 0 to 1, (1-d) value is 1 to 0, otherwise the function that realizes formula right side PWM modulator that just can not be correct.This just requires existing single-phase monocycle power factor alignment technique PWM modulator to realize the operating frequency of circuit must be completely supporting with the integral parameter of integrator, that is to say, work clock one becomes, the integral parameter of integrator must and then become, otherwise will produce the even wrong result of arithmetic eror, this is just greatly affected the effect of power factor correction.And in actual applications, the integral parameter of integrator is by integrating resistor and integrating capacitor decision, and due to the temperature characterisitic factor of components and parts, operating frequency and integral parameter all can exist drift, can not be completely supporting.Even so, even if do not consider the impact of temperature characterisitic and the inconvenience of conversion operating frequency, only the maximum of fine tuning integrator output strictly equates with integrator input voltage, just very bothers and time-consuming, thereby will inevitably affect effective application of this technology.
Summary of the invention
The problem existing in order to solve existing monocycle power factor alignment technique PWM modulator, the adverse effect of must temperature characterisitic factor supporting with the integral parameter of integrator and components and parts bringing because of its operating frequency, and the defect that the effect that causes power factor correction is greatly affected, the present invention proposes a kind of monocycle PWM modulator approach and modulator for power factor correction.
A monocycle PWM modulator approach for power factor correction, is specially:
Voltage error between sampled voltage and reference data voltage is amplified;
Voltage error after described amplification is carried out to integration and timing reset obtains sawtooth voltage;
The average level of described sawtooth voltage of take is reference level, and the sawtooth voltage that described integration and timing reset are obtained is done anti-phase computing and obtained take the sawtooth waveforms to zero of crown under teeth directional that this sawtooth waveforms peak amplitude is the end;
By described take the sawtooth waveforms to zero of crown under the teeth directional that this sawtooth waveforms peak amplitude is the end with control reference quantity and relatively obtain required pulse width modulation wave.
A kind of monocycle PWM modulator for power factor correction, comprise error amplifier, integrator, reset clock signal generator and comparator, two inputs of error amplifier receive reference data voltage and sampled voltage, the output of error amplifier connects the input of integrator, the output of integrator connects the inverting input of inverting amplifier, the output of inverting amplifier connects the input of comparator, the output output pulse width modulating wave of comparator, the output of reset clock signal generator connects the reset terminal of integrator, it is characterized in that, PWM modulator also comprises low pass filter, the input of described low pass filter connects the output of described integrator, the output of described low pass filter connects the in-phase input end of described inverting amplifier.
Further, also comprise rest-set flip-flop, the R end of rest-set flip-flop connects the output of comparator, and the S end of rest-set flip-flop connects the output of reset clock signal generator, the Q end output pulse width modulating wave of rest-set flip-flop.
Further, 1/120～1/80 of the operating frequency that the cut-off frequecy of passband of described low pass filter is clock-signal generator, the passband gain of described low pass filter is 1 ± 0.02 times.
Further, described low pass filter is second-order low-pass filter.
Further, the integrating capacitor of described integrator is in series with resistance.
Further, the gain of described inverting amplifier is 1 ± 0.02 times.
Technique effect of the present invention is embodied in:
The present invention proposes a kind of implementation of monocycle power factor alignment technique PWM modulator, by low pass filter, obtain the required reference level of the present invention program, and by waveform computing, obtain the required sawtooth waveforms of the present invention program PWM modulator, make the PWM modulator on monocycle governing equation equal sign the right can work in required any frequency, and without taking the supporting of integrator integral parameter into account, simultaneously completely cancellation the impact of components and parts temperature characterisitics, effectively overcome the defect of existing implementation.
Accompanying drawing explanation
Fig. 1 is single phase power factor correcting circuit schematic block diagram;
Fig. 2 is the PWM modulator implementation circuit theory schematic block diagram of existing monocycle power factor alignment technique;
A kind of monocycle PWM modulator circuit schematic block diagram for power factor correction that Fig. 3 the present invention proposes;
A kind of another equivalent schematic block diagram of monocycle PWM modulator circuit for power factor correction that Fig. 4 the present invention proposes;
The single phase power factor correcting circuit operating frequency that Fig. 5 forms for the PWM modulator that adopts the present invention and propose is the input current waveform figure of 30kHZ while being output as 3000W;
The single phase power factor correcting circuit that Fig. 6 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current total harmonic distortion THD of 30kHZ while being output as 3000W) figure;
The single phase power factor correcting circuit that Fig. 7 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current waveform figure of 30kHZ while being output as 1500W;
The single phase power factor correcting circuit that Fig. 8 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current total harmonic distortion THD of 30kHZ while being output as 1500W) figure;
The single phase power factor correcting circuit that Fig. 9 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current waveform figure of 25kHZ while being output as 3000W;
The single phase power factor correcting circuit that Figure 10 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current total harmonic distortion THD of 25kHZ while being output as 3000W) figure;
The single phase power factor correcting circuit that Figure 11 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current waveform figure of 25kHZ while being output as 1500W;
The single phase power factor correcting circuit that Figure 12 forms for the PWM modulator implementation that adopts the present invention and propose, operating frequency is the input current total harmonic distortion THD of 25kHZ while being output as 1500W) figure.
Embodiment
For solving the existing problem of implementation of existing monocycle power factor alignment technique PWM modulator, first analyze the implementation of existing single-phase monocycle power factor alignment technique PWM modulator, refer to Fig. 2.
The implementation of existing single-phase monocycle power factor alignment technique PWM modulator is: output voltage, after sampling, is together sent into error amplifier with reference data voltage, and the output of error amplifier is sent into subtracter as the input of integrator simultaneously; The reset terminal that reset clock pulse signal is sent into integrator is sent into the S end of rest-set flip-flop simultaneously, and integrator and reset clock signal generator form the function of saw-toothed wave generator; The output of subtracter is sent into comparator and is compared with the control reference quantity on the formula left side, the R end of rest-set flip-flop is sent in the output of comparator, and the required PWM of implementation that is obtained existing monocycle power factor alignment technique PWM modulator by the Q end of rest-set flip-flop exports.
From its operation principle schematic block diagram 2, the scheme circuit of this PWM modulator wishes to obtain is a sawtooth waveforms of take the negative sense integration amplitude to 0 that voltage Vm is the end, the problem that the scheme circuit of this PWM modulator exists is in actual applications: the operating frequency of this scheme circuit must be completely supporting with the integral parameter of integrator, the last moment of requirement before integrator resets, the output voltage of integrator must strictly equate with the integration reference voltage of input integral device.If strictly do not equated, will make this scheme circuit have one section of time zone to be output as negative, or make the output of this scheme circuit forever not reach 0, that is to say: existing monocycle PWM modulator approach circuit can not meet single-phase monocycle governing equation R
s* I
in=V
m* d in (1-d) by 0 to 1 span, so the effect of its power factor correction is just greatly affected naturally, input current THD can increase.In actual applications, due to the temperature characterisitic of component parameter, all there is drift in the integral parameter of operating frequency and integrator, can not be completely supporting, thereby will inevitably affect effective application of this technology.
In order to solve the problem of above-mentioned existing modulator, the present invention proposes a kind of embodiment as shown in Figure 3, monocycle power factor alignment technique PWM modulator consists of error amplifier 1, integrator 2, inverting amplifier 3, low pass filter 4, reset clock signal generator 5 and comparator 7, in order to realize the function of the PWM modulator of formula right-hand component.
The implementation of described monocycle power factor alignment technique PWM modulator, output voltage, after sampling, is together sent into by operational amplifier N with reference data
1, resistance R
1and R
2the error amplifier 1 forming, the output of error amplifier 1 is as by operational amplifier N
2, resistance R
3, R
4, the integrator 2 that forms by electronics switch S of integrating capacitor C and reset input; Low pass filter 4 is sent in the output of integrator 2, and low pass filter 4 is the second-order low-pass filter forming with operational amplifier, and the output of integrator 2 is sent into by operational amplifier N simultaneously
3, resistance R
5and R
6the inverting input of the inverting amplifier 3 forming, the in-phase input end of inverting amplifier 3 is connected with the output of low pass filter 4, reset clock signal generator 5 is that the oscillator consisting of electronic devices and components is realized, get its burst pulse and as reset clock signal, send into the reset terminal of integrator 2, integrator 2 and reset clock signal generator 5 form the function of saw-toothed wave generator; The output of inverting amplifier 3 is sent into by operational amplifier N
5the comparator 7 forming, compares with the control reference quantity on the formula left side, the obtaining by operational amplifier N of current reference amount
4, resistance R
7and R
8and input current sample resistance R
scomplete, by the output of comparator 7, obtain required PWM and export, refer to Fig. 1, Fig. 3.
Except such scheme, the present invention also proposes another embodiment as shown in Figure 4, a kind of monocycle power factor alignment technique of the present invention PWM modulator, by error amplifier 1, integrator 2, inverting amplifier 3, low pass filter 4, reset clock signal generator 5, rest-set flip-flop 6 and comparator 7, formed, in order to realize the function of the PWM modulator of formula right-hand component.
The implementation of described monocycle power factor alignment technique PWM modulator, output voltage, after sampling, is together sent into by operational amplifier N1, resistance R with reference data
1and R
2the error amplifier 1 forming, the output of error amplifier 1 is as by operational amplifier N
2, resistance R
3, R
4, the integrator 2 that forms by electronics switch S of integrating capacitor C and reset input; Low pass filter 4 is sent in the output of integrator 2, and low pass filter 4 is the second-order low-pass filter forming with operational amplifier, and the output of integrator 2 is sent into by operational amplifier N simultaneously
3, resistance R
5and R
6the inverting input of the inverting amplifier 3 forming, the in-phase input end of inverting amplifier 3 is connected with the output of low pass filter 4, reset clock signal generator 5 is that the oscillator consisting of electronic devices and components is realized, get its burst pulse and as reset clock signal, send into the reset terminal of integrator 2, send into the S end of rest-set flip-flop 6, integrator 2 and reset clock signal generator 5 form the function of saw-toothed wave generator simultaneously; The output of inverting amplifier 3 is sent into by operational amplifier N
5the comparator 7 forming, compares with the control reference quantity on the formula left side, the obtaining by operational amplifier N of current reference amount
4, resistance R
7and R
8and input current sample resistance R
scomplete, the R end of rest-set flip-flop 6 is sent in the output of comparator 7, obtains required PWM export by the Q end of rest-set flip-flop 6, refers to Fig. 1, Fig. 4.
For making the implementation of monocycle power factor alignment technique of the present invention have more practicality, this implementation is also finely tuned the average DC level of sawtooth waveforms by the method for the small resistor of connecting in the integrating capacitor at integrator 2, referring to the R in Fig. 3, Fig. 4
4, to obtaining minimum current total harmonic distortion (THD); Low pass filter is step low-pass, is reduced volume, adopts the active low-pass filter consist of operational amplifier, and its passband DC current gain is 1 ± 0.02 times, and its passband edge frequency is clock frequency 1/120～1/80; The gain of inverting amplifier of the present invention is 1 ± 0.02 times.
The circuit feature of realizing of monocycle power factor alignment technique PWM modulator of the present invention is, average level by obtaining described sawtooth waveforms is as with reference to level, this sawtooth waveforms is carried out to calculation process, take this average level as computing is with reference to ground, this sawtooth waveforms is done to anti-phase computing, obtain a sawtooth waveforms of take crown to 0 under the teeth directional that this sawtooth waveforms peak amplitude is the end, this sawtooth waveforms meets single-phase monocycle governing equation R completely
s* I
in=V
m* requirement (1-d), the restrictive condition that must strictly equate with the input integral reference voltage of integrator without the output voltage of integrator.The circuit of realizing that adopts monocycle power factor alignment technique PWM modulator of the present invention, under any circumstance all meets single-phase monocycle governing equation R
s* I
in=V
m* (1-d) span of middle d is the requirement between 1 to 0.Thereby solved well the defect that existing single-phase monocycle power factor alignment technique PWM modulator is realized circuit, make operating frequency not directly related with integral parameter, and eliminated the impact of components and parts temperature characterisitics completely, make this technology may obtain extensively effectively application.
The single phase power factor correcting circuit that the implementation that Fig. 5 to Fig. 8 is application monocycle power factor alignment technique PWM modulator of the present invention forms is 30kHZ, input inductance input current waveform figure and the total harmonic distortion figures thereof while being output as 3000W and 1500w while being 2mH in operating frequency.When being output as 3000W, its input current total harmonic distortion (THD) is less than 2%, and when being output as 1500W, its input current total harmonic distortion (THD) is less than 3%.
The single phase power factor correcting circuit that the implementation that Fig. 9 to Figure 12 is application monocycle power factor alignment technique PWM modulator of the present invention forms, is not changing the element R that determines integral parameter
4and under the condition of C, referring to Fig. 3, operating frequency is to change to 25kHZ, input inductance input current waveform figure and the total harmonic distortion figures thereof while being output as 3000W and 1500w while being 2mH.When being output as 3000W, its input current total harmonic distortion (THD) is less than 2% equally, when being output as 1500W, and its input current total harmonic distortion (THD) 3% left and right.
The variation of visible operating frequency, exerts an influence hardly to its performance, and the implementation of result proof monocycle power factor alignment technique PWM modulator of the present invention reaches the object of expection completely.
More than explanation is only preferred version of the present invention; and graft application is controlled the implementation of PWM modulator in the three-phase activity coefficient adjustment monocycle easily; should be understood that; for those skilled in the art; do not departing under the condition of the technology of the present invention principle; can also make some improvement and modification, these improvement and modification also should be considered as protection scope of the present invention.
Claims (7)
1. for a monocycle PWM modulator approach for power factor correction, be specially:
Voltage error between sampled voltage and reference data voltage is amplified;
Voltage error after described amplification is carried out to integration and timing reset obtains sawtooth voltage;
It is characterized in that:
By low pass filter, obtain the average level of sawtooth voltage, the average level of described sawtooth voltage of take is reference level, and the sawtooth voltage that described integration and timing reset are obtained is done anti-phase computing and obtained take the sawtooth waveforms to zero of crown under teeth directional that this sawtooth waveforms peak amplitude is the end;
By described take the sawtooth waveforms to zero of crown under the teeth directional that this sawtooth waveforms peak amplitude is the end with control reference quantity and relatively obtain required pulse width modulation wave.
2. the monocycle PWM modulator for power factor correction, comprise error amplifier, integrator, inverting amplifier, reset clock signal generator and comparator, two inputs of error amplifier receive reference data voltage and sampled voltage, the output of error amplifier connects the input of integrator, the output of integrator connects the inverting input of inverting amplifier, the output of inverting amplifier connects the input of comparator, the output output pulse width modulating wave of comparator, the output of reset clock signal generator connects the reset terminal of integrator, it is characterized in that, PWM modulator also comprises low pass filter, the input of described low pass filter connects the output of described integrator, the output of described low pass filter connects the in-phase input end of described inverting amplifier, described integrator and reset clock signal generator form saw-toothed wave generator, described low pass filter is for obtaining the average level of sawtooth voltage, it is reference level that described inverting amplifier be take the average level of described sawtooth voltage, this sawtooth voltage is done to anti-phase computing, obtain one and take the sawtooth waveforms to zero of crown under the teeth directional that this sawtooth waveforms peak amplitude is the end.
3. the monocycle PWM modulator for power factor correction according to claim 2, it is characterized in that, also comprise rest-set flip-flop, the R end of rest-set flip-flop connects the output of comparator, the S end of rest-set flip-flop connects the output of reset clock signal generator, the Q end output pulse width modulating wave of rest-set flip-flop.
4. the monocycle PWM modulator for power factor correction according to claim 2, it is characterized in that, the cut-off frequecy of passband of described low pass filter be clock-signal generator operating frequency 1/120～1/80, the passband gain of described low pass filter is 1 ± 0.02 times.
5. according to claim 2 for the monocycle PWM modulator of power factor correction, it is characterized in that, described low pass filter is second-order low-pass filter.
6. the monocycle PWM modulator for power factor correction according to claim 2, is characterized in that, the integrating capacitor of described integrator is in series with resistance.
7. the monocycle PWM modulator for power factor correction according to claim 2, is characterized in that, the gain of described inverting amplifier is 1 ± 0.02 times.
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| CN103595239B (en) * | 2012-08-15 | 2015-12-16 | 珠海格力电器股份有限公司 | Circuit of power factor correction and control method thereof |
| CN104052315A (en) * | 2013-03-13 | 2014-09-17 | 原景科技股份有限公司 | AC/DC buck convertor |
| CN110829824A (en) * | 2019-10-25 | 2020-02-21 | 东南大学 | Single-cycle PF controller based on Boost circuit |
| US20220337159A1 (en) * | 2021-04-19 | 2022-10-20 | Mediatek Singapore Pte. Ltd. | Voltage regulator using feedback loop circuit for accurately regulating output voltage when integration of error voltage is on hold |
| CN117748954B (en) * | 2024-02-19 | 2024-04-16 | 成都芯正微电子科技有限公司 | Triangular wave longitudinally adjustable Buck regulation and control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911580A (en) * | 2005-08-10 | 2007-02-14 | 发那科株式会社 | Electric discharge machining apparatus |
| CN102355130A (en) * | 2011-10-09 | 2012-02-15 | 南通大学 | Double-tube Buck-Boost type PFC (Power Factor Correction) converter based on one-cycle control |
| CN202663289U (en) * | 2012-04-01 | 2013-01-09 | 武汉永力电源技术有限公司 | Single-cycle PWM (Pulse-Width Modulation) modulator for correcting power factor |
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|---|---|---|---|---|
| DE10225406B4 (en) * | 2002-06-07 | 2005-07-14 | Infineon Technologies Ag | Method for driving a switch in a switching converter and drive circuit for controlling a switch |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911580A (en) * | 2005-08-10 | 2007-02-14 | 发那科株式会社 | Electric discharge machining apparatus |
| CN102355130A (en) * | 2011-10-09 | 2012-02-15 | 南通大学 | Double-tube Buck-Boost type PFC (Power Factor Correction) converter based on one-cycle control |
| CN202663289U (en) * | 2012-04-01 | 2013-01-09 | 武汉永力电源技术有限公司 | Single-cycle PWM (Pulse-Width Modulation) modulator for correcting power factor |
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Address after: East Lake New Technology Development Zone Wu Da Yuan Road 430223 Hubei city of Wuhan province 9-2 Patentee after: WUHAN YONGLI TECHNOLOGY CO., LTD. Address before: East Lake New Technology Development Zone Wu Da Yuan Road 430223 Hubei city of Wuhan province 9-2 Patentee before: Wuhan Yongli Power Supply Technology Co., Ltd. |