CN106533152A - Device and method for improving PF of Boost three-level converter - Google Patents
Device and method for improving PF of Boost three-level converter Download PDFInfo
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- CN106533152A CN106533152A CN201611112825.8A CN201611112825A CN106533152A CN 106533152 A CN106533152 A CN 106533152A CN 201611112825 A CN201611112825 A CN 201611112825A CN 106533152 A CN106533152 A CN 106533152A
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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
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc 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
- H02M7/217—Conversion of ac power input into dc 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
- H02M7/2173—Conversion of ac power input into dc 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 in a biphase or polyphase circuit arrangement
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a device and a method for improving PF of a Boost three-level converter. The device comprises a main power circuit of the Boost three-level converter, a digital processing controller, a signal conditioning circuit, a driving circuit, an auxiliary power supply circuit and a sampling conditioning circuit. According to the method, a rectification voltage outputted by a diode rectification circuit and an output voltage of the converter are sampled and are then outputted to an ADC module of the digital processing controller after signal conditioning, after analog-to-digital conversion carried out by the ADC module, a digital signal is transmitted to a control algorithm for improving a power factor, after control operation, an acquired duty ratio of the converter is outputted through a PWM module of the digital processing controller. Through the device and the method, voltage stress of a power switch tube can be reduced, the volume of an inductor is reduced, loss of the converter is reduced, efficiency of the converter is improved, digital control operation is carried out through employing the digital processing controller, the duty ratio of the controller is made to change according to sine rules within half a power frequency period, and the power factor is improved to be 1.
Description
Technical field
The invention belongs to the AC-DC converter field in electrical energy changer, particularly a kind of to improve tri- level of Boost
The device and method of changer PF.
Background technology
With the development of Power Electronic Technique, to Harmonics of Input in electrical energy changer and input power factor
(Power Factor, PF) requires more and more higher, PFC (Power Factor Correction, PFC) changer
It is widely applied.PFC technologies are broadly divided into passive PFC technologies and active PFC technologies, and wherein active PFC technologies adopt work
Make the Technics of Power Electronic Conversion circuit in high frequency, have the advantages that small volume, lightweight, input power factor be high and efficiency high.
Because of its continuous input current, topological structure is simple for Boost circuit, the features such as efficiency high, research and is applied in active PFC technologies
Widest topological structure.But because of the boosting characteristic of Boost circuit, in the case of high input voltage, corresponding height output electricity
Pressure can make the storage capacitor overtension in circuit, and then make power switch pipe bear very high voltage stress.So, on the one hand
Switching loss and the on-state loss of device is increased, on the other hand, power switch pipe voltage stress is too high to be brought to parts selection
Difficulty.The voltage stress of switching tube can be reduced to Boost three-level converters the 50% of two level Boosts, while drop
The low harmonic content of output voltage, using more extensive in high pressure, powerful occasion.
The control method of pfc converter can be divided into simulation and control and digital control.Through years of researches and development, simulation
Control technology is highly developed, due to the simplicity and low cost of implementation of control method, includes power factor in field of power supplies
In correcting circuit, the dominance market share is account for.But simulate the limitation of control and can not increasingly meet current higher energy
Source standard requires that the control method of current pfc converter has problems with：The voltage stress of power switch pipe is high,.Inductance
Volume is big and loss of changer is serious, causes the i.e. power factor reduction of efficiency of changer.
The content of the invention
It is an object of the invention to provide a kind of apparatus and method of raising Boost three-level converter PF, can reduce
The voltage stress of power switch pipe, reduces the volume of inductance, reduces the loss of changer, improves the efficiency of changer, using number
Word processing controller carries out digital control computing, the dutycycle of changer is sinusoidally become in half power frequency period
Change, PF is improved to 1.
The technical solution for realizing the object of the invention is：A kind of device of raising Boost three-level converter PF, including
Main power circuit, digital process controller, signal conditioning circuit, drive circuit, auxiliary power supply circuit and over-sampling modulate circuit；
The main power circuit includes：Input voltage source vin, electromagnetic interface filter, diode rectifier circuit RB, Boost inductance
Lb, power switch pipe Q1 and Q2, diode D1 and D2, storage capacitor C1 and C2 load RL；Input voltage source vinFilter with EMI
The input port connection of device, the output port of electromagnetic interface filter are connected with the input port of diode rectifier circuit RB, and diode is whole
The negative output terminal of current circuit RB is to refer to zero-potential point, positive output end and the Boost inductance L of diode rectifier circuit RBbOne
End connection, Boost inductance LbThe other end respectively with the first power switch pipe Q1 drain electrode and the first diode D1 anode company
Connect, the negative electrode of the first diode D1 anode and load R respectively with the first storage capacitor C1LOne end connection, the first energy storage electricity
Hold negative electrode source electrode respectively with the first power switch pipe Q1, the drain electrode of the second power switch pipe Q2 and the second storage capacitor C2 of C1
Anode connection, the negative electrode of the second storage capacitor C2 respectively with the anode of the second diode D2 and load RLThe other end connection,
The negative electrode of the second diode D2 is connected with the negative output terminal of the source electrode and diode rectifier circuit RB of second switch pipe Q2 respectively, main
In power circuit, the voltage at diode rectifier circuit RB two ends is commutating voltage Vg, load RLThe voltage at two ends is output voltage Vo；
The digital process controller includes：ADC, control algolithm and PWM module, commutating voltage VgAnd output voltage
VoThe ADC of digital process controller is accessed after over-sampling modulate circuit, and digital processing control is delivered in the output of ADC
The control algolithm of device, the result of control algolithm are exported to signal conditioning circuit by PWM module；
The pwm signal that digital process controller is input into by the signal conditioning circuit carries out conditioning amplification, signal condition electricity
The outfan on road is connected with the input of drive circuit；
The control signal of drive circuit output first switch pipe Q1 and second switch pipe respectively with main power circuit
The grid of Q2 is connected；
The output of auxiliary power supply circuit is respectively connected to digital process controller, signal conditioning circuit, drive circuit and sampling
Modulate circuit, the effect of auxiliary power supply circuit are to provide electric energy to above-mentioned each circuit chips work；
Two inputs of the over-sampling modulate circuit respectively with main power circuit diode rectifier circuit RB it is just defeated
Go out end and the load R being connected with the first storage capacitor C1 anodesLOne end be connected, the commutating voltage V of samplinggAnd output voltage
VoIt is connected with the ADC input of digital process controller after conditioning.
A kind of method of raising Boost three-level converter PF, comprises the following steps：
Step 1, over-sampling modulate circuit gather the commutating voltage V of main power circuitgWith output voltage Vo, nurse one's health through voltage
After being met the input voltage range of requirement afterwards, the ADC of digital process controller is sent into；
Step 2, the ADC of digital process controller are converted to voltage analog signal after digital signal, deliver to numeral
In the control algolithm of the raising power factor of processing controller；
Step 3, enters the duty of line transformer in the control algolithm module of the raising power factor of digital process controller
Than controlling computing, the dutycycle of changer is made sinusoidally to change in half power frequency period；
Step 4, the PWM module output of the duty cycle control signal Jing word processing controllers that Jing control computings are obtained, PWM letters
Number after signal conditioning circuit and drive circuit, two power switch pipes in main power circuit are driven.
Compared with prior art, its remarkable advantage is the present invention：(1) voltage stress of power switch pipe can be reduced；(2)
Switching frequency is the 1/2 of current ripples frequency, can further reduce the volume of inductance；(3) reduction of voltage stress and frequency makes
The loss of changer is reduced, and improves the efficiency of changer；(4) digital process controller can faster realize high density meter
Control algolithm is calculated, power factor is improved to 1.
Description of the drawings
Fig. 1 is the main circuit diagram of Boost three-level PFC changers.
Fig. 2 is current waveform figure of the Boost inductance in switch periods under DCM patterns.
Fig. 3 is to determine the PF value curve charts under Duty ratio control.
Fig. 4 is the oscillogram of variable duty cycle expression formula.
Fig. 5 is Boost three-level PFCs changer and its control circuit schematic diagram under DCM patterns.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment makes further description to the present invention.
The present invention devises a kind of device and method of raising Boost three-level converter PF.
The theoretical derivation of Boost three-level PFCs changer under 1.DCM patterns：
For convenience of analyzing, first make as follows：1. all devices are ideal element；2. output voltage ripple and its DC quantity phase
Compare very little；3. switching frequency is far above input voltage frequency.
Main circuit diagrams of the Fig. 1 for Boost three-level PFC changers, in switch periods, Boost three-level PFCs become
Two switching tube alternate conductions of parallel operation, when Fig. 2 gives changer and is operated in discontinuous current mode (DCM) pattern, one is opened
The voltage and current waveform of inductance in the cycle of pass.As seen from the figure, switching frequency for current ripples frequency 1/2, inductance electricity
Stream can be analyzed in half switch periods, this volume that can not only make inductance with low frequency come the characteristic for controlling high frequency
Further reduce, and the loss for switching also is reduced.When two power switch pipes Q1 and Q2 are simultaneously turned on, inductance
LbThe voltage at two ends is vg, inductive current iLbStart from scratch with vg/LbSlope linear rise, energy storage in inductance, energy storage
Electric capacity C1 and C2 are load R jointlyLEnergy is provided；When switching tube Q1 conducting Q2 are turned off, diode D1 bears backward voltage pass
It is disconnected, diode D2 conductings, inductance LbThe voltage at two ends is vg-VC1, inductive current linear decline requirement vg<VC1, when two energy storage
The equal i.e. V of capacitor's capacityC1=VC2=Vo/ 2, inductance LbThe voltage at two ends is vg-Vo/ 2, inductive current iLbWith (vg-Vo/2)/Lb
Slope linear decline, now storage capacitor C2 charge, C1 electric discharge.Before half switch periods terminates, inductive current iLbIt is reduced to
0, storage capacitor C1 and C2 are load R jointlyLEnergy is provided.The analysis of half switch periods is similar with above-mentioned analysis afterwards.
Define input ac voltage vinT () is：
vin(t)=Vmsin(ωt) (1)
Wherein VmIt is the amplitude of input ac voltage, ω is the angular frequency of input ac voltage.
So, input voltage vinT commutating voltage v that () is obtained Jing after diode rectifier circuit RB rectificationsgFor：
vg=Vm|sin(ωt)| (2)
In switch periods, the peak value of inductive current is：
The dutycycle of two of which switching tube Q1, Q2 is identical to be D, TsFor switch periods.
In each switch periods, inductance LbThe volt-seconds area at two ends is equal, i.e.,：
Wherein storage capacitor voltage isDrThe dutycycle being reduced to for inductive current corresponding to zero.
Obtained by formula (2) and formula (4)：
Can be obtained by formula (3) and formula (5), a switch periods internal inductance electric current iLbMeansigma methodss iLb_avFor：
Wherein fsFor switching frequency.
So input current is：
Mean Input Power P in power frequency periodinFor：
Wherein TlineFor the input ac voltage cycle.
Assume that transducer effciency is 100%, then input power is equal to output, i.e. Pin=Po, can be accounted for by formula (9)
Sky than D is：
Expression formula can be worth in the hope of PF by formula (7) and formula (9)：
The PF value curves determined under Duty ratio control can be made according to formula (12), as shown in Figure 3.It can be seen that working as
Output voltage VoOne timing, VmBigger, corresponding PF values are less, and Boost three-level PFCs changer contrasts traditional two level and becomes
Parallel operation, in the case where power device rated value is constant, output voltage can be improved to twice, therefore can be by improving output
The electric pressure of voltage is improving PF values, but PF values are still by input voltage amplitude and output voltage ratioThe impact of change.Cause
This, needs to propose new method to improve PF values.
2. the derivation and realization of the variable duty cycle control method of PF values are improved：
Observation (7) formula, if take dutycycle
Then input current becomes and turns to：
If in a power frequency period, dutycycle changes according to formula (13), works as DoDuring by taking constant, input current formula
(14) be sine wave, and with input voltage same phase, exactly make PF=1.
By formula (1) and formula (14), the Mean Input Power P of changer can be derivedinFor：
As available from the above equation：
Bring formula (16) into formula (13), can obtain：
By formula (17) as can be seen that gained variable duty cycle DySinusoidally change in power frequency period, be with regard to defeated
Enter voltage vinThe function of (t), it is possible to make input current and input voltage same phase, PF values reach 1.Variable duty cycle expression formula
Oscillogram it is as shown in Figure 4.
3. a kind of device and method of raising Boost three-level converter PF of the present invention
With reference to Fig. 5, the device of Boost three-level converter PF is improved, including main power circuit 1, digital process controller
2nd, signal conditioning circuit 3, drive circuit 4, auxiliary power supply circuit 5 and over-sampling modulate circuit 6；
The main power circuit 1 includes：Input voltage source vin, electromagnetic interface filter, diode rectifier circuit RB, Boost inductance
Lb, power switch pipe Q1 and Q2, diode D1 and D2, storage capacitor C1 and C2 load RL；Input voltage source vinFilter with EMI
The input port connection of device, the output port of electromagnetic interface filter are connected with the input port of diode rectifier circuit RB, and diode is whole
The negative output terminal of current circuit RB is to refer to zero-potential point, positive output end and the Boost inductance L of diode rectifier circuit RBbOne
End connection, Boost inductance LbThe other end respectively with the first power switch pipe Q1 drain electrode and the first diode D1 anode company
Connect, the negative electrode of the first diode D1 anode and load R respectively with the first storage capacitor C1LOne end connection, the first energy storage electricity
Hold negative electrode source electrode respectively with the first power switch pipe Q1, the drain electrode of the second power switch pipe Q2 and the second storage capacitor C2 of C1
Anode connection, the negative electrode of the second storage capacitor C2 respectively with the anode of the second diode D2 and load RLThe other end connection,
The negative electrode of the second diode D2 is connected with the negative output terminal of the source electrode and diode rectifier circuit RB of second switch pipe Q2 respectively, main
In power circuit 1, the voltage at diode rectifier circuit RB two ends is commutating voltage Vg, load RLThe voltage at two ends is output voltage
Vo；
The digital process controller 2 includes：ADC, control algolithm and PWM module, commutating voltage VgWith output electricity
Pressure VoThe ADC of digital process controller 2 is accessed after over-sampling modulate circuit 6, and digital processing is delivered in the output of ADC
The control algolithm of controller 2, the result of control algolithm are exported to signal conditioning circuit (3) by PWM module；
The pwm signal that digital process controller 2 is input into by the signal conditioning circuit 3 carries out conditioning amplification, signal condition
The outfan of circuit 3 is connected with the input of drive circuit 4；
The control signal of the output of the drive circuit 4 first switch pipe Q1 and second switch respectively with main power circuit 1
The grid of pipe Q2 is connected；
The output of the auxiliary power supply circuit 5 is respectively connected to digital process controller 2, signal conditioning circuit 3, drive circuit
4 and over-sampling modulate circuit 6, the effect of auxiliary power supply circuit 5 is to provide electric energy to above-mentioned each circuit chips work；
Two inputs of the over-sampling modulate circuit 6 are respectively with diode rectifier circuit RB in main power circuit 1 just
Outfan and the load R being connected with the first storage capacitor C1 anodesLOne end be connected, the commutating voltage V of samplinggWith output electricity
Pressure VoIt is connected with the ADC input of digital process controller 2 after conditioning.
Preferably, the digital process controller 2 adopts dsp chip TMS320F28335.
The method that the present invention improves Boost three-level converter PF, comprises the following steps：
Step 1, over-sampling modulate circuit 6 gather the commutating voltage V of main power circuit 1gWith output voltage Vo, adjust through voltage
After the input voltage range of requirement is met after reason, the ADC of digital process controller 2 is sent into；
Step 2, the ADC of digital process controller 2 are converted to voltage analog signal after digital signal, deliver to numeral
In the control algolithm of the raising power factor of processing controller 2；
Step 3, enters the duty of line transformer in the control algolithm module of the raising power factor of digital process controller 2
Than controlling computing, the dutycycle of changer is made sinusoidally to change in half power frequency period；
The control algolithm of the raising power factor of the digital process controller 2 adopt Changing Pattern for：Duty ratio control computing, wherein VoFor the output voltage of main power circuit 1, Po
For the output of main power circuit 1, VmFor the peak value of the input ac voltage of main power circuit 1, ω is input ac voltage
Angular frequency, LbFor Boost inductance value, fsFor switching frequency.
Step 4, the PWM module output of the duty cycle control signal Jing digital process controllers 2 that Jing control computings are obtained,
After pwm signal passes through signal conditioning circuit 3 and drive circuit 4, drive two power switch pipe Q1 in main power circuit 1 and
Q2。
In sum, the invention discloses a kind of device and method of raising Boost three-level converter PF, can reduce
The voltage stress of power switch pipe, reduces the volume of inductance, reduces the loss of changer, improves the efficiency of changer, using number
Word processing controller carries out digital control computing, the dutycycle of changer is sinusoidally become in half power frequency period
Change, power factor is improved to 1, be there is High Power Factor, high power density, conveniently realized.
Claims (4)
1. a kind of device of raising Boost three-level converter PF, it is characterised in that including main power circuit (1), digital processing
Controller (2), signal conditioning circuit (3), drive circuit (4), auxiliary power supply circuit (5) and over-sampling modulate circuit (6)；
Main power circuit (1) includes：Input voltage source vin, electromagnetic interface filter, diode rectifier circuit RB, Boost inductance
Lb, power switch pipe Q1 and Q2, diode D1 and D2, storage capacitor C1 and C2 load RL；Input voltage source vinFilter with EMI
The input port connection of device, the output port of electromagnetic interface filter are connected with the input port of diode rectifier circuit RB, and diode is whole
The negative output terminal of current circuit RB is to refer to zero-potential point, positive output end and the Boost inductance L of diode rectifier circuit RBbOne
End connection, Boost inductance LbThe other end respectively with the first power switch pipe Q1 drain electrode and the first diode D1 anode company
Connect, the negative electrode of the first diode D1 anode and load R respectively with the first storage capacitor C1LOne end connection, the first energy storage electricity
Hold negative electrode source electrode respectively with the first power switch pipe Q1, the drain electrode of the second power switch pipe Q2 and the second storage capacitor C2 of C1
Anode connection, the negative electrode of the second storage capacitor C2 respectively with the anode of the second diode D2 and load RLThe other end connection,
The negative electrode of the second diode D2 is connected with the negative output terminal of the source electrode and diode rectifier circuit RB of second switch pipe Q2 respectively, main
In power circuit (1), the voltage at diode rectifier circuit RB two ends is commutating voltage Vg, load RLThe voltage at two ends is output voltage
Vo；
Digital process controller (2) include：ADC, control algolithm and PWM module, commutating voltage VgWith output voltage Vo
The ADC of digital process controller (2) is accessed after over-sampling modulate circuit (6), and digital processing is delivered in the output of ADC
The control algolithm of controller (2), the result of control algolithm are exported to signal conditioning circuit (3) by PWM module；
The pwm signal that digital process controller (2) is input into is carried out conditioning amplification, signal condition by signal conditioning circuit (3)
The outfan of circuit (3) is connected with the input of drive circuit (4)；
The control signal that drive circuit (4) export first switch pipe Q1 and second switch respectively with main power circuit (1)
The grid of pipe Q2 is connected；
The output of auxiliary power supply circuit (5) is respectively connected to digital process controller (2), signal conditioning circuit (3), drives electricity
Road (4) and over-sampling modulate circuit (6), the effect of auxiliary power supply circuit (5) are to provide electric energy to above-mentioned each circuit chips work；
Two inputs of over-sampling modulate circuit (6) are respectively with diode rectifier circuit RB in main power circuit (1) just
Outfan and the load R being connected with the first storage capacitor C1 anodesLOne end be connected, the commutating voltage V of samplinggWith output electricity
Pressure VoIt is connected with the ADC input of digital process controller (2) after conditioning.
2. the device of raising Boost three-level converter PF according to claim 1, it is characterised in that at the numeral
Reason controller (2) realizes the digital control of switch tube dutycycle using dsp chip TMS320F28335.
3. a kind of method of raising Boost three-level converter PF, it is characterised in that comprise the following steps：
Step 1, the commutating voltage V of over-sampling modulate circuit (6) collection main power circuit (1)gWith output voltage Vo, adjust through voltage
After the input voltage range of requirement is met after reason, the ADC of digital process controller (2) is sent into；
Step 2, the ADC of digital process controller (2) are converted to voltage analog signal after digital signal, deliver to digital place
In the control algolithm of the raising power factor of reason controller (2)；
Step 3, enters the dutycycle of line transformer in the control algolithm module of the raising power factor of digital process controller (2)
Control computing, makes the dutycycle of changer sinusoidally change in half power frequency period；
Step 4, the PWM module output of duty cycle control signal Jing digital process controllers (2) that Jing control computings are obtained, PWM
After signal passes through signal conditioning circuit (3) and drive circuit (4), two power switch pipe Q1 in main power circuit (1) are driven
And Q2.
4. the method for raising Boost three-level converter PF according to claim 3, it is characterised in that number described in step 3
The control algolithm of the raising power factor of word processing controller (2) adopt Changing Pattern for：Duty ratio control computing, wherein VoFor the output electricity of main power circuit (1)
Pressure, PoFor the output of main power circuit (1), VmFor the peak value of the input ac voltage of main power circuit (1), ω is input
The angular frequency of alternating voltage, LbFor Boost inductance value, fsFor switching frequency.
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| CN201611112825.8A CN106533152B (en) | 2016-12-07 | 2016-12-07 | A kind of device and method improving Boost three-level converter PF |
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| WO2018208991A1 (en) * | 2017-05-10 | 2018-11-15 | North Carolina State University | Modular medium voltage fast chargers |
| WO2018232818A1 (en) * | 2017-06-21 | 2018-12-27 | 广东美的制冷设备有限公司 | Method and device for obtaining effective value of alternating current voltage of pfc power supply |
| CN109286311A (en) * | 2017-07-19 | 2019-01-29 | 中国电力科学研究院 | A kind of tap coupler inductance type non-isolation type direct-current booster converter and modulator approach |
| CN109347331A (en) * | 2018-12-05 | 2019-02-15 | 深圳市英可瑞科技股份有限公司 | A kind of tri-level switch power-supply system and its bus voltage eqaulation control method |
| CN110768526A (en) * | 2019-11-04 | 2020-02-07 | 河北电立方新能源科技有限公司 | Boost circuit and control method thereof |
| CN113162410A (en) * | 2021-04-19 | 2021-07-23 | 南通大学 | Three-port converter and control method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124105A (en) * | 2017-05-05 | 2017-09-01 | 南京理工大学 | Improve isolated form three-level PFC converter PF control system and method |
| CN107124105B (en) * | 2017-05-05 | 2019-06-25 | 南京理工大学 | Improve the control system and method for isolated form three-level PFC converter PF |
| WO2018208991A1 (en) * | 2017-05-10 | 2018-11-15 | North Carolina State University | Modular medium voltage fast chargers |
| US11356015B2 (en) | 2017-05-10 | 2022-06-07 | North Carolina State University | Modular medium voltage fast chargers |
| WO2018232818A1 (en) * | 2017-06-21 | 2018-12-27 | 广东美的制冷设备有限公司 | Method and device for obtaining effective value of alternating current voltage of pfc power supply |
| CN109286311A (en) * | 2017-07-19 | 2019-01-29 | 中国电力科学研究院 | A kind of tap coupler inductance type non-isolation type direct-current booster converter and modulator approach |
| CN107612304A (en) * | 2017-09-06 | 2018-01-19 | 湖北工业大学 | Single-phase five level Boosts type power factor correcting converter |
| CN109347331A (en) * | 2018-12-05 | 2019-02-15 | 深圳市英可瑞科技股份有限公司 | A kind of tri-level switch power-supply system and its bus voltage eqaulation control method |
| CN110768526A (en) * | 2019-11-04 | 2020-02-07 | 河北电立方新能源科技有限公司 | Boost circuit and control method thereof |
| CN113162410A (en) * | 2021-04-19 | 2021-07-23 | 南通大学 | Three-port converter and control method thereof |
| CN113162410B (en) * | 2021-04-19 | 2021-12-28 | 南通大学 | Three-port converter and control method thereof |
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