CN107659138B - 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 PDFInfo
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- CN107659138B CN107659138B CN201711021320.5A CN201711021320A CN107659138B CN 107659138 B CN107659138 B CN 107659138B CN 201711021320 A CN201711021320 A CN 201711021320A CN 107659138 B CN107659138 B CN 107659138B
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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 methods, including commercial power rectification circuit, pfc circuit, single-phase full bridge inverter circuit, filter capacitor, analog control circuit.The beneficial effects of the present invention are: (1) PFC is not necessarily to electrolytic capacitor, system reliability is high, long service life；(2) decoupling circuit DC capacitor voltage is low, of less demanding to pressure resistance, is conducive to device selection；(3) given value of control circuit does not extract the response of load-side, insensitive to load variation, improves the stability and reliability of circuit operation；(4) electric current of PFC inflow 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 modulation, and switching signal generative circuit structure is simple.
Description
Technical field
The present invention relates to power factor correction technology field, especially a kind of other power decoupled no electrolytic capacitor PFC's
A kind of novel alternative solution.
Background technique
In AC/DC or DC/AC power conversion unit, since instantaneous input-output power is uneven, generally require in direct current
The electrolytic capacitor of side parallel connection large capacity is filtered.With the development of the technologies such as energy-saving illumination, generation of electricity by new energy, and electrolytic capacitor
The shortcomings that volume is big, the service life is short, poor safety performance affects the reliability of single unit system, therefore more and more occasion needs avoid
Use electrolytic capacitor.No electrolytic capacitor PFC mainly has following several circuit topologies:
1. replacing electrolytic capacitor using series LC network.This method filters out specific ripple current by resonance, absorbs electricity
Extra pulsating power in road.But due in pfc circuit ripple current frequencies it is generally lower, generally require using very big electricity
Inductance value.
2. increasing voltage ripple method and Harmonic Injection Method.The timing of given frequency one, storage capacitor size and mean power at
Voltage fluctuation on direct ratio, with capacitor is inversely proportional.So in the case that circuit input/output condition is certain, it is appropriate to increase capacitor electricity
Pressure fluctuation can reduce capacitance.Suitable harmonic current is injected to exchange side, 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 topology.Since auxiliary capacitor need to handle all input energies, and pass through
Transformation is transmitted to outlet side twice, and active energy also passes through cascade circuit other than quadergy, and system loss is larger.
4. in traditional BoostPFC outlet side parallel connection Buck/Boost reversible transducer.The main disadvantage of Boost in parallel
End is that when the duty ratio 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 influenced by load variation；Although Buck converter in parallel solves the problems, such as the pressure-resistant of device, but its control circuit
Sampled signal still need to extract from load-side, it is sensitive to load variation.
Summary of the invention
That it is an object of that present invention to provide a kind of circuit theories is relatively simple, no electrolytic capacitor may be implemented, absorbs idle function
The tandem type power decoupled no electrolytic capacitor pfc circuit and decoupling control method of rate.
To achieve the above object, use following technical scheme: 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, capacitor C3, filter capacitor C2, storage capacitor C1, load, rectifier bridge, AC power source AC composition；
The drain electrode of switching tube S1 is connected with the drain electrode of switching tube S2, storage capacitor C1 anode respectively, the source electrode of switching tube S1
It is connected respectively with the drain electrode of switching tube S3, the one end inductance L1；The source electrode of switching tube S2 respectively with the drain electrode of switching tube S4, filtered electrical
Appearance one end C2, the one end capacitor C3, load one end are connected；The storage capacitor C1 cathode source electrode with switching tube S3, switching tube S4 respectively
Connect；Parallel diode D3 at parallel diode D2, switching tube S3 at parallel diode D1, switching tube S2 at switching tube S1, it opens
Close parallel diode D4 at pipe S4；
The inductance L1 other end is connected with diode D6 cathode, diode D6 anode respectively with the one end inductance L2, diode D5
The drain electrode of cathode, switching tube S5 is connected, and the rectified bridge of the other end of inductance L2 is connected with AC power source AC；AC power source AC is another
Rectified bridge is held to be connected respectively with the source electrode of switching tube S5, diode D5 anode, the capacitor C3 other end, the load other end.
Decoupling circuit control method in a kind of tandem type power decoupled no electrolytic capacitor pfc circuit, additional one and net side
Voltage, with the voltage signal of phase, which is taken absolute value and carries out Fourier decomposition after operation with frequency, after removing DC component
Of ac takes capacitor C2 both end voltage signal as feedback quantity as voltage Setting signal, the two 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,
Generation PWM wave, and then driving switch pipe S1 and switching tube S4, switching tube S3 driving signal and switching tube S1 are compared with carrier wave
Driving signal is complementary, and switching tube S2 is complementary with switching tube S4 driving signal.
The course of work approximately as:
The circuit includes that single-phase full bridge inverter circuit part (is referred to as by pfc circuit, 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 in exchange side for decoupling circuit of connecting after pfc circuit, the low side port of decoupling circuit connect PFC load, load output
Voltage sampling signal gives the first analog control circuit, and the first analog control circuit controls pfc circuit；Second capacitor two sides voltage is adopted
Sample signal gives the second analog control circuit, and the second analog control circuit controls decoupling circuit.
Above-mentioned technical solution can also advanced optimize are as follows: first analog control circuit include voltage regulator,
Absolute value block, multiplier, current regulator, PWM modulation module, drive module.It loads the voltage sampling signal exported and gives
Determine signal and multiplier is output to by voltage regulator, input voltage signal sampling is output to multiplier through absolute value block, multiplies
Musical instruments used in a Buddhist or Taoist mass is output to the anode of current regulator, and rectifier bridge output current sample is input to the cathode of current regulator, current regulation
The output of device is input to PWM module, and PWM module exports PWM modulation signal to drive module, and drive module controls pfc circuit.Institute
Stating the second analog control circuit includes voltage regulator, PWM module, drive module.Second capacitor two 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 drives decoupling circuit.
Above-mentioned technical solution can also advanced optimize are as follows: PFC voltage Setting signal is in the first analog control circuit
DC quantity.
Above-mentioned technical solution can also advanced optimize are as follows: voltage Setting signal is sine in the second analog control circuit
Wave takes absolute value, then the remaining AC portion of DC component of going out after Fourier decomposition, and the sine wave and input signal are the same as frequency
Same phase.
Pfc circuit regulation power factor makes electric current floating voltage always, so that power factor levels off to 1.Circuit work
In ccm mode.
First capacitor balance PFC outputs and inputs power, absorbs extra reactive power, the work of effect and storage capacitor
With similar.
Compared with prior art, the present invention has the advantage that
1, the PFC is not necessarily to electrolytic capacitor, and system reliability is high, long service life；
2, inverter direct-flow side capacitance voltage is low, of less demanding to pressure resistance；
3, decoupling circuit control circuit part does not introduce pfc circuit load voltage, therefore insensitive to load voltage ripple；
4, the electric current of PFC inflow inverter is continuous, reduces the high frequency ripple energy of inverter outflow；
5, the control method of the inverter uses PWM modulation, and switching signal generative circuit structure is simple.
Detailed description of the invention
Fig. 1 is tandem type power decoupled no electrolytic capacitor pfc circuit schematic diagram of the present invention；
Fig. 2 is that the 6th diode of PFC exchanges side voltage and PFC output voltage waveform with ground voltage, inverter circuit；
Fig. 3 is tandem type power decoupled no electrolytic capacitor PFC main circuit diagram；
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 figure；
Fig. 7 is tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode simulation result diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
As shown in Figure 1, this tandem type power decoupled no electrolytic capacitor pfc circuit includes pfc circuit, decoupling circuit, filtering
Capacitor, analog control circuit.The high-end port in exchange side of series connection decoupling circuit after pfc circuit, the low side port of decoupling circuit connects
PFC load, load output voltage sampled signal give the first analog control circuit, and the first analog control circuit controls pfc circuit；The
Two capacitor two sides voltage sampling signals give the second analog control circuit, and the second analog control circuit controls decoupling circuit.
As shown in Figure 2, it is known that rectifier bridge output voltage be with network voltage with width with phase two times of power frequencies " steamed bun wave " (just
Waveform of the string wave after signed magnitude arithmetic(al)), it is increased by Boost circuit boosting positive peak, it is assumed that for Vbo in figure.This electricity
According to the principle of series connection partial pressure, " steamed bun wave " Vbo by boosting should be that inverter circuit exchanges side both end voltage VC2 and bears on road
The sum of resistive voltage Vld is carried, Vbo is subjected to Fourier decomposition, DC component corresponds to load resistance both end voltage, and two times, three times
And the voltage at the AC compounent synthesis inverter circuit exchange side both ends of the above power frequency.Therefore using inverter circuit exchange side 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 circuit is made 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, capacitor C3, filtered electrical
Hold C2, storage capacitor C1, load, rectifier bridge, AC power source AC composition；
The drain electrode of switching tube S1 is connected with the drain electrode of switching tube S2, storage capacitor C1 anode respectively, the source electrode of switching tube S1
It is connected respectively with the drain electrode of switching tube S3, the one end inductance L1；The source electrode of switching tube S2 respectively with the drain electrode of switching tube S4, filtered electrical
Appearance one end C2, the one end capacitor C3, load one end are connected；The storage capacitor C1 cathode source electrode with switching tube S3, switching tube S4 respectively
Connect；Parallel diode D3 at parallel diode D2, switching tube S3 at parallel diode D1, switching tube S2 at switching tube S1, it opens
Close parallel diode D4 at pipe S4；
The inductance L1 other end is connected with diode D6 cathode, diode D6 anode respectively with the one end inductance L2, diode D5
The drain electrode of cathode, switching tube S5 is connected, and the rectified bridge of the other end of inductance L2 is connected with AC power source AC；AC power source AC is another
Rectified bridge is held to be connected respectively with the source electrode of switching tube S5, diode D5 anode, the capacitor C3 other end, the load other end.
Alternating current uncontrollable rectifier circuit is by four rectifier 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 tube S1 and the 4th
When switching tube S4 is opened as shown in Fig. 4 (a), the first inductance L1 is in discharge condition at this time, and first capacitor C1 is in discharge condition；
When first switch tube S1 and the 4th switching tube S4 is turned off, and second switch S2 and third switching tube S3 are opened, inductive current cannot
It is mutated at once, therefore afterflow is connected with third diode D3 by the second diode D2, the first inductance C1 is in charged state such as Fig. 4
(b) shown in；Second switch S2 and third 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, and first capacitor C1 starts to discharge；When second switch S2 and third switching tube S3 is turned off, first is opened
When pass pipe S1 and the 4th switching tube S4 is opened, inductive current cannot be mutated at once, therefore first diode D1 and the 4th diode
Afterflow is connected in D4, and first capacitor C1 is in shown in charged state such as Fig. 4 (d).Each period decoupling circuit is with above-mentioned working condition
Cycle operation.
Tandem type power decoupled no electrolytic capacitor pfc circuit decoupling circuit open loop control mode is as shown in figure 5, the part PFC
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 current detection signal of inductance L2 as feedback signal with give
Determine signal to compare, be corrected after error amplification through current regulator, finally by the signal and triangle wave generation PWM after correction
Wave, and then PFC switching tube is driven to realize current on line side floating voltage.
Decoupling circuit part equally uses PWM modulation mode, produces voltage signal, the voltage from rectifier bridge outlet side first
Signal is 2 times of power frequencies, with voltage on line side with width with the sinusoidal absolute value signal of phase, by the signal multiplied by a fixed coefficient
(coefficient is the AC compounent amplitude extracted after Fourier decomposition of sine wave absolute value divided by obtained by DC voltage value,
* 1.57/311 in such as figure), sine wave absolute value remaining DC component after Fourier decomposition is then subtracted, finally with three
Angle Bobbi relatively generates PWM wave, and then drives first switch tube S1 and the 4th switching tube S4, third switching tube S3 driving signal and the
One switching tube S1 driving signal is complementary, and second switch S2 is complementary with the 4th switching tube S4 driving signal.
Tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode is as shown in Figure 6.Decoupling circuit exchange
The given value of side is the modulating wave of above-mentioned open loop circuit, takes the second capacitor C2 both end voltage signal as feedback quantity, the two makes the difference
It is corrected by voltage regulator, the modulated signal V after output calibrationo1；Take decoupling circuit DC voltage as another feedback quantity
Compared with given value, error signal input voltage regulation device after making the difference, the modulation wave signal and Vo1It is added as total modulation
Wave mode number finally exports PWM wave, and then drive first switch tube S1 and the 4th switching tube S4, third compared with triangular signal
Switching tube S3 driving signal is complementary with first switch tube S1 driving signal, second switch S2 and the 4th switching tube S4 driving signal
It is complementary.
Tandem type power decoupled no electrolytic capacitor PFC decoupling circuit close-loop control mode simulation result is as shown in Figure 7.PFC
Input side electric current, voltage waveform such as Fig. 7 a) shown in, wherein amplitude be 2V be PFC input voltage divided by 311V multiplied by 2 wave
Shape, carrying out the above purpose calculated is to be contracted to voltage magnitude with the comparable numerical value of current amplitude in order to compared with；This
The waveform that outer amplitude is 1.3A is PFC input side current waveform.PF value and THD value meet national standard in figure.
Fig. 7 b) with the voltage waveform actual value that Fig. 7 c) is respectively PFC load-side to exchange with decoupling circuit side voltage waveform real
Actual value.Fig. 7 b) in load voltage stablize in 400V, magnitude of a voltage fluctuation is that ± 5V ripple factor is 1%, Fig. 7 c) in waveforms amplitude
Average value be 170V, minimum value be -400V, period 100Hz.
The control mode according to series connection voltage divider principle and Kirchhoff's second law realize to the decomposition of PFC output voltage into
And realize power decoupled, successfully realize the no electrolytic capacitor of circuit.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (2)
1. a kind of tandem type power decoupled no electrolytic capacitor pfc circuit, it is characterised in that: the circuit includes switching tube S1, opens
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, capacitor C3, filter capacitor C2, storage capacitor C1, load, rectifier bridge, AC power source AC
Composition；
The drain electrode of switching tube S1 is connected with the drain electrode of switching tube S2, storage capacitor C1 anode respectively, the source electrode difference of switching tube S1
It is connected with the drain electrode of switching tube S3, the one end inductance L1；The source electrode of switching tube S2 respectively with the drain electrode of switching tube S4, filter capacitor C2
One end, the one end capacitor C3, load one end are connected；Storage capacitor C1 cathode connects with the source electrode of switching tube S3, switching tube S4 respectively；
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 end is connected with diode D6 cathode, diode D6 anode respectively with the one end inductance L2, diode D5 cathode,
The drain electrode of switching tube S5 is connected, and the rectified bridge of the other end of inductance L2 is connected with AC power source AC；AC power source AC other end warp
Rectifier bridge is connected with the source electrode of switching tube S5, diode D5 anode, the capacitor C3 other end, the load other end respectively.
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 by: additional one with voltage on line side with frequency with the voltage signal of phase, which is taken absolute value and carries out Fu after operation
In leaf decompose, remove DC component after of ac be used as voltage Setting signal, take capacitor C2 both end voltage signal as feed back
Amount, the two correct after making the difference through voltage regulator, and the voltage signal after correction is denoted as Vo1；Decoupling circuit DC voltage is made
It for one of feedback quantity, is corrected after it is made the difference with given DC reference amount through voltage regulator, which is done with Vo1
It is inputted with, the signal as modulating wave, generation PWM wave, and then driving switch pipe S1 and switching tube S4 is compared with carrier wave, is opened
Pass pipe S3 driving signal is complementary with switching tube S1 driving signal, and switching tube S2 is complementary with switching tube S4 driving signal.
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| CN109768720B (en) * | 2019-01-22 | 2021-02-02 | 汲克凤 | Active filter rectification circuit |
| CN113437886B (en) * | 2021-06-28 | 2022-08-05 | 燕山大学 | Rectifying circuit and control method thereof |
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| CN105119319A (en) * | 2015-09-15 | 2015-12-02 | 湖北工业大学 | Active filtering three-phase and four-wire system type photovoltaic grid-connected system and method |
| CN106849708A (en) * | 2017-02-10 | 2017-06-13 | 中南大学 | A kind of PFC fairings |
| CN106953535A (en) * | 2017-04-14 | 2017-07-14 | 合肥工业大学 | A kind of model-free Poewr control method of PFC AC/DC converters |
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| CN102820769B (en) * | 2012-08-15 | 2014-08-13 | 武汉理工大学 | Control method for inhibiting self-adaption waveform of inversion system low-frequency ripple |
| GB2549994B (en) * | 2016-05-07 | 2019-07-31 | Icergi Ltd | A method of controlling a current shaping circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105119319A (en) * | 2015-09-15 | 2015-12-02 | 湖北工业大学 | Active filtering three-phase and four-wire system type photovoltaic grid-connected system and method |
| CN106849708A (en) * | 2017-02-10 | 2017-06-13 | 中南大学 | A kind of PFC fairings |
| CN106953535A (en) * | 2017-04-14 | 2017-07-14 | 合肥工业大学 | A kind of model-free Poewr control method of PFC AC/DC converters |
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