CN107659138A - A kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method - Google Patents

A kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method Download PDF

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Publication number
CN107659138A
CN107659138A CN201711021320.5A CN201711021320A CN107659138A CN 107659138 A CN107659138 A CN 107659138A CN 201711021320 A CN201711021320 A CN 201711021320A CN 107659138 A CN107659138 A CN 107659138A
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switching tube
circuit
diode
voltage
pfc
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CN107659138B (en
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王立乔
崔舒敏
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Yanshan University
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Yanshan University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • 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 discloses a kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method, including commercial power rectification circuit, pfc circuit, single-phase full bridge inverter circuit, filter capacitor, analog control circuit.The beneficial effects of the invention are as follows：(1) PFC is without electrochemical capacitor, and system reliability is high, service life length；(2) decoupling circuit DC capacitor voltage is low, to pressure-resistant less demanding, is advantageous to device selection；(3) set-point of control circuit does not extract the response of load-side, insensitive to load change, improves the stability and reliability of circuit operation；(4) electric current of PFC inflows decoupling circuit is continuous, reduces the high frequency ripple energy of decoupling circuit outflow；(5) circuit structure is simple, and efficiency of transmission is high.(6) control method of the decoupling circuit uses PWM, and switching signal generative circuit is simple in construction.

Description

A kind of tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method
Technical field
The present invention relates to power factor correction technology field, especially a kind of other power decoupled no electrolytic capacitors PFC's A kind of new alternative solution.
Background technology
In AC/DC or DC/AC power conversion units, because instantaneous input-output power is uneven, generally require in direct current The electrochemical capacitor of side parallel connection Large Copacity is filtered.With the development of the technologies such as energy-saving illumination, generation of electricity by new energy, and electrochemical capacitor The shortcomings that volume is big, short life, poor safety performance have impact on the reliability of single unit system, therefore increasing occasion needs to avoid Use electrochemical capacitor.No electrolytic capacitor PFC mainly has following several circuit topologies：
1. replace electrochemical capacitor using series LC network.This method filters out specific ripple current by resonance, absorbs electricity Unnecessary pulsating power in road.But due in pfc circuit ripple current frequencies it is typically relatively low, generally require to use very big electricity Inductance value.
2. increase voltage ripple method and Harmonic Injection Method.The timing of given frequency one, storage capacitor size and mean power into Voltage pulsation on direct ratio, with electric capacity is inversely proportional.So in the case that circuit input/output condition is certain, it is appropriate to increase electric capacity electricity Pressure fluctuation can reduce capacitance.Suitable harmonic current is injected to AC, required storage capacitor capacitance can also reduce.But It is that the injection of harmonic current inevitably reduces the power factor of power electronic equipment.
3. cascade connection type Boost-Flyback circuit topologies.Because auxiliary capacitor need to handle all input energies, and pass through Conversion is delivered to outlet side twice, and active energy also passes through cascade circuit in addition to quadergy, and system loss is larger.
4. in traditional BoostPFC outlet sides parallel connection Buck/Boost reversible transducers.The main disadvantage of Boost in parallel End is that, when the dutycycle value of decoupling circuit is larger, device will bear very high pressure voltage, and sampled signal will be from load Side is extracted, therefore is influenceed by load change；Although Buck converters in parallel solve the pressure-resistant problem of device, but its control circuit Sampled signal still need to extract from load-side, it is sensitive to load change.
The content of the invention
Present invention aims at providing, a kind of circuit theory is relatively simple, can realize no electrolytic capacitor, absorbs idle work( The tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method of rate.
To achieve the above object, following technical scheme is employed：Circuit of the present invention includes switching tube S1, switching tube S2, switching tube S3, switching tube S4, switching tube S5, diode D1, diode D2, diode D3, diode D4, diode D5, two Pole pipe D6, inductance L1, inductance L2, electric capacity C3, filter capacitor C2, storage capacitor C1, load, rectifier bridge, AC power AC compositions；
The drain electrode with switching tube S2, storage capacitor C1 positive poles are connected respectively for switching tube S1 drain electrode, switching tube S1 source electrode The drain electrode with switching tube S3, inductance L1 one end are connected respectively；Switching tube S2 the source electrode drain electrode with switching tube S4, filtered electrical respectively Appearance C2 one end, electric capacity C3 one end, load one end are connected；Storage capacitor C1 negative poles respectively with switching tube S3, switching tube S4 source electrode Connect；Parallel diode D3 at parallel diode D2, switching tube S3 at parallel diode D1, switching tube S2 at switching tube S1, open Close parallel diode D4 at pipe S4；
The inductance L1 other ends are connected with diode D6 anodes, diode D6 negative electrodes respectively with inductance L2 one end, diode D5 The drain electrode of anode, switching tube S5 is connected, and the inductance L2 rectified bridge of the other end is connected with AC power AC positive poles；AC power AC The source electrode with switching tube S5, diode D5 negative electrodes, the electric capacity C3 other ends, the load other end are connected the rectified bridge of negative pole respectively.
Decoupling circuit control method in a kind of tandem type power decoupled no electrolytic capacitor pfc circuit, additional one and net side Voltage signal of the voltage with frequency with phase, the signal is taken absolute value Fourier decomposition is carried out after computing, after removing DC component For of ac as voltage Setting signal, power taking holds C2 both end voltages signal as feedback quantity, both make the difference after through voltage regulator Correction, the voltage signal after correction are denoted as Vo1；Using decoupling circuit DC voltage as one of feedback quantity, by its with it is given DC reference amount corrects after making the difference through voltage regulator, the correction signal and Vo1 are done and, the signal as modulating wave input, PWM ripples, and then driving switch pipe S1 and switching tube S4, switching tube S3 drive signals and switching tube S1 are produced compared with carrier wave Drive signal is complementary, and switching tube S2 is complementary with switching tube S4 drive signals.
The course of work approximately as：
The circuit includes pfc circuit, single-phase full bridge inverter circuit part (is referred to as by single-phase full bridge inverter circuit below Decoupling circuit), filter capacitor, analog control circuit, wherein city's electric signal inputted after the circuit rectifies of commercial power rectification PFC electricity Road, the high-end port of AC for decoupling circuit of connecting after pfc circuit, the low side port of decoupling circuit connect PFC loads, load output Voltage sampling signal gives the first analog control circuit, the first analog control circuit control pfc circuit；Second electric capacity both sides voltage is adopted Sample signal gives the second analog control circuit, the second analog control circuit control decoupling circuit.
Above-mentioned technical scheme can also be further optimized for：First analog control circuit include voltage regulator, Absolute value block, multiplier, current regulator, PWM module, drive module.The voltage sampling signal of output is loaded with giving Determine signal and multiplier is output to by voltage regulator, input voltage signal sampling is output to multiplier through absolute value block, multiplied Musical instruments used in a Buddhist or Taoist mass is output to the positive pole of current regulator, and rectifier bridge output current samples the negative pole for being input to current regulator, current regulation The output of device is input to PWM module, and PWM module exports PWM modulation signal to drive module, drive module control pfc circuit.Institute Stating the second analog control circuit includes voltage regulator, PWM module, drive module.Second electric capacity both sides voltage sampling signal with Setting signal is input to voltage regulator, and voltage regulator is output to PWM module, and PWM module exports PWM modulation signal to driving Module, drive decoupling circuit.
Above-mentioned technical scheme can also be further optimized for：PFC voltages Setting signal is in first analog control circuit DC quantity.
Above-mentioned technical scheme can also be further optimized for：Voltage Setting signal is sine in second analog control circuit Ripple takes absolute value, then the remaining AC portion of DC component of being gone out after Fourier decomposition, and the sine wave is with input signal with frequency Same phase.
Pfc circuit adjusts power factor, makes electric current floating voltage all the time so that power factor levels off to 1.The circuit works In ccm mode.
First capacitive balance PFC is inputted and power output, absorbs unnecessary reactive power, and it acts on the work with storage capacitor With similar.
Compared with prior art, the invention has the advantages that：
1st, the PFC is without electrochemical capacitor, and system reliability is high, service life length；
2nd, inverter direct-flow side capacitance voltage is low, to pressure-resistant less demanding；
3rd, decoupling circuit control circuit part does not introduce pfc circuit load voltage, therefore insensitive to load voltage ripple；
4th, the electric current of PFC inflows inverter is continuous, reduces the high frequency ripple energy of inverter outflow；
5th, the control method of the inverter uses PWM, and switching signal generative circuit is simple in construction.
Brief description of the drawings
Fig. 1 is tandem type power decoupled no electrolytic capacitor pfc circuit schematic diagram of the present invention；
Fig. 2 is the diodes of PFC the 6th and ground voltage, inverter circuit AC voltage and PFC output voltage waveforms；
Fig. 3 is tandem type power decoupled no electrolytic capacitor PFC main circuit diagrams；
Fig. 4 is tandem type power decoupled no electrolytic capacitor PFC 4 kinds of operation modes of decoupling circuit；
Fig. 5 is tandem type power decoupled no electrolytic capacitor PFC control circuit circuit diagram；
Fig. 6 is tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode figures；
Fig. 7 is tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode simulation result figures.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, this tandem type power decoupled no electrolytic capacitor pfc circuit includes pfc circuit, decoupling circuit, filtering Electric capacity, analog control circuit.The high-end port of AC of series connection decoupling circuit after pfc circuit, the low side port of decoupling circuit connects PFC is loaded, and load output voltage sampled signal gives the first analog control circuit, the first analog control circuit control pfc circuit；The Two electric capacity both sides voltage sampling signals give the second analog control circuit, the second analog control circuit control decoupling circuit.
As shown in Figure 2, it is known that rectifier bridge output voltage be with line voltage with width with phase two times of power frequencies " steamed bun ripple " (just Waveform of the string ripple after signed magnitude arithmetic(al)), raised by Boost circuit boosting positive peak, it is assumed that be Vbo in figure.This electricity According to the principle of series connection partial pressure, " steamed bun ripple " Vbo by boosting should be inverter circuit AC both end voltage VC2 with bearing on road Resistive voltage Vld sums are carried, Vbo is subjected to Fourier decomposition, DC component corresponds to load resistance both end voltage, two times, three times And the voltage at the AC compounent synthesis inverter circuit AC both ends of above power frequency.Therefore using inverter circuit AC voltage as Controlled device, detailed control process will be given below.
As shown in figure 3, tandem type power decoupled no electrolytic capacitor PFC main circuits are made up of pfc circuit and decoupling circuit.
Specifically, the circuit includes switching tube S1, switching tube S2, switching tube S3, switching tube S4, switching tube S5, two poles Pipe D1, diode D2, diode D3, diode D4, diode D5, diode D6, inductance L1, inductance L2, electric capacity C3, filtered electrical Hold C2, storage capacitor C1, load, rectifier bridge, AC power AC compositions；
The drain electrode with switching tube S2, storage capacitor C1 positive poles are connected respectively for switching tube S1 drain electrode, switching tube S1 source electrode The drain electrode with switching tube S3, inductance L1 one end are connected respectively；Switching tube S2 the source electrode drain electrode with switching tube S4, filtered electrical respectively Appearance C2 one end, electric capacity C3 one end, load one end are connected；Storage capacitor C1 negative poles respectively with switching tube S3, switching tube S4 source electrode Connect；Parallel diode D3 at parallel diode D2, switching tube S3 at parallel diode D1, switching tube S2 at switching tube S1, open Close parallel diode D4 at pipe S4；
The inductance L1 other ends are connected with diode D6 anodes, diode D6 negative electrodes respectively with inductance L2 one end, diode D5 The drain electrode of anode, switching tube S5 is connected, and the inductance L2 rectified bridge of the other end is connected with AC power AC positive poles；AC power AC The source electrode with switching tube S5, diode D5 negative electrodes, the electric capacity C3 other ends, the load other end are connected the rectified bridge of negative pole respectively.
Civil power uncontrollable rectifier circuit is by four commutation diode D7、D8、D9、D10Composition.
In Fig. 4, Fig. 4 (a) (b) (c) (d) show 4 kinds of operation modes of decoupling circuit.As first switch pipe S1 and the 4th When switching tube S4 is opened as shown in Fig. 4 (a), now the first inductance L1 is in discharge condition, and the first electric capacity C1 is in discharge condition； When first switch pipe S1 and the 4th switching tube S4 is turned off, inductive current can not when second switch pipe S2 and the 3rd switching tube S3 are opened It is mutated at once, therefore the second diode D2 turns on afterflow with the 3rd diode D3, the first inductance C1 is in charged state such as Fig. 4 (b) shown in；Second switch pipe S2 and the 3rd switching tube S3 is open-minded after the energy release in inductance, as shown in Fig. 4 (c), First inductance L1 is started to charge up, and the first electric capacity C1 starts to discharge；When second switch pipe S2 and the 3rd switching tube S3 is turned off, first opens When pass pipe S1 and the 4th switching tube S4 is opened, inductive current can not be mutated at once, therefore the first diode D1 and the 4th diode D4 turns on afterflow, and the first electric capacity C1 is in shown in charged state such as Fig. 4 (d).Each cycle decoupling circuit is with above-mentioned working condition Circulation work.
Tandem type power decoupled no electrolytic capacitor pfc circuit decoupling circuit open loop control mode is as shown in figure 5, PFC parts Using traditional double loop control, as shown in the first analog control circuit in figure, i.e., from load end by voltage sampling signal with Setting signal is made comparisons, the voltage signal after error amplification after voltage regulator output calibration, the signal and voltage on line side Absolute value signal be multiplied Setting signal as current inner loop, using the first inductance L1 current signal as feedback signal with giving Determine signal to compare, corrected after error amplification through current regulator, the signal after correction and triangle wave are finally generated into PWM Ripple, and then drive PFC switching tubes to realize current on line side floating voltage.
Decoupling circuit part equally uses PWM mode, produces voltage signal, the voltage from rectifier bridge outlet side first Signal is 2 times of power frequencies, the sinusoidal absolute value signal with voltage on line side with width with phase, the signal is multiplied by into a fixed coefficient (obtained by the AC compounent amplitude divided by DC voltage value that the coefficient extracts for sine wave absolute value after Fourier decomposition, * 1.57/311 in such as figure), sine wave absolute value remaining DC component after Fourier decomposition is then subtracted, finally with three Angle Bob relatively produces PWM ripples, and then drives first switch pipe S1 and the 4th switching tube S4, the 3rd switching tube S3 drive signals and the One switching tube S1 drive signals are complementary, and second switch pipe S2 and the 4th switching tube S4 drive signals are complementary.
Tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control modes are as shown in Figure 6.Decoupling circuit exchanges The set-point of side is the modulating wave of above-mentioned open loop circuit, and taking the second electric capacity C2 both end voltages signal, both make the difference as feedback quantity Corrected by voltage regulator, the modulated signal V after output calibrationo1；Decoupling circuit DC voltage is taken as another feedback quantity Compared with set-point, the error signal input voltage regulation device after making the difference, the modulation wave signal and Vo1It is added as total modulation Wave mode number, compared with triangular signal, PWM ripples are finally exported, and then drive first switch pipe S1 and the 4th switching tube S4, the 3rd Switching tube S3 drive signals are complementary with first switch pipe S1 drive signals, second switch pipe S2 and the 4th switching tube S4 drive signals It is complementary.
Tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode simulation results are as shown in Figure 7.PFC Input side electric current, voltage waveform such as Fig. 7 a) shown in, wherein amplitude is that 2V is PFC input voltages divided by 311V multiplied by with 2 ripple Shape, the purpose for carrying out above calculating is in order to which voltage magnitude is contracted into the numerical value suitable with current amplitude in order to compared with；This The waveform that outer amplitude is 1.3A is PFC input side current waveforms.PF values meet national standard with THD values in figure.
Fig. 7 b) with Fig. 7 c) be respectively PFC load-sides voltage waveform actual value and decoupling circuit AC voltage waveform it is real Actual value.Fig. 7 b) in load voltage it is stable in 400V, magnitude of a voltage fluctuation is that ± 5V ripple factors are 1%, Fig. 7 c) in waveforms amplitude Average value be 170V, minimum value is -400V, cycle 100Hz.
The control mode realizes that the decomposition to PFC output voltages is entered according to series connection voltage divider principle and Kirchhoff's second law And power decoupled is realized, successfully realize the no electrolytic capacitor of circuit.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.

Claims (2)

  1. A kind of 1. tandem type power decoupled no electrolytic capacitor pfc circuit, it is characterised in that：The circuit includes switching tube S1, opened Close pipe S2, switching tube S3, switching tube S4, switching tube S5, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, inductance L1, inductance L2, electric capacity C3, filter capacitor C2, storage capacitor C1, load, rectifier bridge, AC power AC Composition；
    The drain electrode with switching tube S2, storage capacitor C1 positive poles are connected respectively for switching tube S1 drain electrode, switching tube S1 source electrode difference Drain electrode, inductance L1 one end with switching tube S3 are connected；Switching tube S2 the source electrode drain electrode with switching tube S4, filter capacitor C2 respectively One end, electric capacity C3 one end, load one end are connected；Source electrode of the storage capacitor C1 negative poles respectively with switching tube S3, switching tube S4 connects； Parallel diode D3, switching tube S4 at parallel diode D2, switching tube S3 at parallel diode D1, switching tube S2 at switching tube S1 Locate parallel diode D4；
    The inductance L1 other ends are connected with diode D6 anodes, diode D6 negative electrodes respectively with inductance L2 one end, diode D5 anodes, Switching tube S5 drain electrode is connected, and the inductance L2 rectified bridge of the other end is connected with AC power AC positive poles；AC power AC negative poles The source electrode with switching tube S5, diode D5 negative electrodes, the electric capacity C3 other ends, the load other end are connected rectified bridge respectively.
  2. 2. one kind is based on decoupling circuit control method in tandem type power decoupled no electrolytic capacitor pfc circuit described in claim 1, It is characterized in that：Additional one voltage signal with voltage on line side with frequency with phase, the signal is taken absolute value and carries out Fu after computing In leaf decompose, remove the of ac after DC component and be used as voltage Setting signal, power taking holds C2 both end voltages signals as feeding back Amount, both correct after making the difference through voltage regulator, and the voltage signal after correction is denoted as Vo1；Decoupling circuit DC voltage is made For one of feedback quantity, corrected after it is made the difference with given DC reference amount through voltage regulator, the correction signal is done with Vo1 Inputted with, the signal as modulating wave, PWM ripples, and then driving switch pipe S1 and switching tube S4 are produced compared with carrier wave, is opened It is complementary with switching tube S1 drive signals to close pipe S3 drive signals, switching tube S2 is complementary with switching tube S4 drive signals.
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CN108923638A (en) * 2018-09-11 2018-11-30 西南交通大学 A kind of control method and device of continuous mode boost power factor correcting converter
CN109768720A (en) * 2019-01-22 2019-05-17 汲克凤 A kind of active power filtering rectification circuit
CN113437886A (en) * 2021-06-28 2021-09-24 燕山大学 Rectifying circuit and control method thereof

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Publication number Priority date Publication date Assignee Title
CN108923638A (en) * 2018-09-11 2018-11-30 西南交通大学 A kind of control method and device of continuous mode boost power factor correcting converter
CN108923638B (en) * 2018-09-11 2023-10-27 西南交通大学 Control method and device of continuous mode boost power factor correction converter
CN109768720A (en) * 2019-01-22 2019-05-17 汲克凤 A kind of active power filtering rectification circuit
CN113437886A (en) * 2021-06-28 2021-09-24 燕山大学 Rectifying circuit and control method thereof

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