CN107171544A - A kind of full digital full-bridge isolated single-phase single-grade PFC（PFC）Converter - Google Patents
A kind of full digital full-bridge isolated single-phase single-grade PFC（PFC）Converter Download PDFInfo
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- CN107171544A CN107171544A CN201710412341.3A CN201710412341A CN107171544A CN 107171544 A CN107171544 A CN 107171544A CN 201710412341 A CN201710412341 A CN 201710412341A CN 107171544 A CN107171544 A CN 107171544A
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Classifications
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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
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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
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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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
Abstract
The present invention relates to a kind of full digital full-bridge isolated single-phase single-grade PFC (PFC) converter, including single-phase input rectifier bridge V1, input capacitance Cin, soft starting circuit, input inductance Lin, main switch S1~S4, high frequency transformer TR, single-phase output rectifier bridge V2, output filter capacitor Co, load resistance Ro, in addition to a Digital Control System.Main circuit is used as present invention employs the full-bridge single stage topology for combining soft starting circuit, and merged a kind of full digital full-bridge isolated single-phase single-grade PFC (PFC) inverter control method, it is small with high power level, input and output isolation, harmonic wave, and the advantages of good dynamic response characteristic and steady-state adjustment characteristic, had broad application prospects in industrial quarters.
Description
Technical field
The present invention relates to a kind of PFC (PFC) converter, more particularly to a kind of full digital full-bridge isolated
Single-phase single-grade PFC (PFC) converter.
Background technology
Generally, power electronic equipment accesses power network, and traditional diode or thyristor rectifier device meeting by rectifier bridge
Produce substantial amounts of harmonic current so that power factor is very low, power network is polluted.Active Power Factor Correction Technology can have
The harmonic wave for eliminating fairing, reduction energy resource consumption, the volume and weight for reducing power-supply device of effect, therefore answered with extensive
Use prospect.To meet the harmonic standard that country and international organization formulate, switching mode Active Power Factor Correction Converter is obtained
To being widely applied.
The main method for improving AC/DC circuit input ends power factor and reduction Harmonics of Input is to use power factor
(PFC) technology of correction.Two kinds of main methods of PFC (PFC) technology are PPFC respectively and active
PFC.PPFC technology is one filtered electrical of series connection between the input rectifying bridge and electric capacity of circuit
Sense, or access resonance filter in AC.Its major advantage is simple, cost is low, reliability is high and EMI is small, main to lack
Point is that volume weight is big, is difficult to obtain higher power factor, and service behaviour is relevant with frequency, load change and input change
Deng.At present, using most, effect most preferably Active Power Factor Correction Technology, Active Power Factor Correction Technology can divide
For single-stage type and traditional two kinds of two-stage type, the major advantage of traditional two-stage type APFC is：It is at different levels can be independent
Design, versatility is good；Have the disadvantage：Circuit is complicated, and electric energy passes through two stages for the treatment of, and conversion efficiency is relatively low, and power density is low and cost
It is higher.And single-stage the PFC of type isolated form (PFC) converter, with energy through once changing, simple in construction, cost compared with
The typical advantages such as low, efficiency is higher and dynamic response is very fast, it is adaptable to middle high-power applications occasion.In face of industrial quarters it is some should
High power level and input and output electrical isolation are proposed to the PFC of power network input (PFC) converter with occasion
It is required that it is more advantageous, there is very big development potentiality.
The content of the invention
High-power in being applied to it is an object of the invention to provide one kind, cost is relatively low, simple in construction, efficiency high, with compared with
High Power Factor, and the full digital full-bridge isolated single-phase single-grade power factor school of wide range output and multiple-channel output can be realized
Just (PFC) converter.
The object of the present invention is achieved like this：The converter includes single-phase input rectifier bridge V1, input capacitance Cin, soft
Start-up circuit, input inductance Lin, main switch S1~S4, high frequency transformer TR, single-phase output rectifier bridge V2, output filtered electrical
Hold Co, load resistance Ro and a Digital Control System.
The positive terminal of the single-phase input rectifier bridge V1 and the upper end of the input capacitance Cin, the soft starting circuit
Input upper end phase tandem, the lower end of the input capacitance Cin and single-phase input rectifier bridge V1 negative pole end, soft starting circuit it is defeated
Enter lower end phase tandem.
The cathode output end of the soft starting circuit is connected with inputting inductance Lin front end, input inductance Lin rear end
The drain electrode phase tandem of drain electrode and switching tube S4 with the switching tube S1, the source electrode of the switching tube S1 is with the switching tube S2's
Drain electrode is connected, and the source electrode of the switching tube S4 is connected with the drain electrode of the switching tube S3, the source electrode of the switching tube S2 and
The source electrode of the switching tube S3 and the soft starting circuit cathode output end phase tandem.
The lead-out wire of the switching tube S1 and the switching tube S2 tie point and the high frequency transformer TR armature windings
One end be connected, the lead-out wire of the switching tube S4 and the switching tube S3 tie point and the high frequency transformer TR are primary
The other end of winding is connected.
Two inputs of the two ends of the high frequency transformer TR secondary windings respectively with the single-phase output rectifier bridge V2
It is connected, the output filter capacitor Co is connected in parallel between two output ends of the single-phase output rectifier bridge V2, the load
Resistance Ro is connected in parallel between two end points of the filter capacitor Co.
Gather converter output voltage Vout, input current Iin and the single-phase input rectifier bridge V1 output voltage Vin
Total digital controller is together inputted, the Digital Control System of outer voltage current inner loop is constituted, digitial controller is according to sampling
Signal carries out PI modulation, and four opening for main switch are controlled with shut-off.
It is an advantage of the invention that realizing PFC (PFC) and power conversion using single-level circuit so that input
Electrical isolation is exported, can realize that carrying out PFC (PFC) in middle large-power occasions obtains higher power factor, and
The wide range output and multiple-channel output of voltage are realized, is obtained while additional circuit is not increased using all-digitized demodulator technology
Good dynamic and steady-state adjustment characteristic, and solve the problems, such as to simulate the transformer bias occurred in control.
Brief description of the drawings
Fig. 1 is full digital the PFC of full-bridge isolated single-phase single-grade (PFC) converter.
Fig. 2 is the work wave of Fig. 1 PFCs (PFC) converter.
Fig. 3 is Digital Control System block diagram.
Fig. 4 is main program flow chart.
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention is that (PFC is converted for a kind of full digital full-bridge isolated single-phase single-grade PFC
Device, including single-phase input rectifier bridge V1, input capacitance Cin, soft starting circuit, input inductance Lin, main switch S1~S4, height
It is digital that frequency power transformer TR, single-phase output rectifier bridge V2, output filter capacitor Co, load resistance Ro and digitial controller are constituted
Control system.
In the present embodiment, the positive terminal of the single-phase input rectifier bridge V1 and the input capacitance Cin upper end, described
The input upper end phase tandem of soft starting circuit, the lower end of the input capacitance Cin is exported with single-phase input rectifier bridge V1 negative pole
End, the input lower end phase tandem of soft starting circuit.
In the present embodiment, the cathode output end of the soft starting circuit is connected with inputting inductance Lin front end, inputs
Inductance Lin rear end and the drain electrode of the switching tube S1 and switching tube S4 drain electrode phase tandem, the source electrode of the switching tube S1 with
The drain electrode of the switching tube S2 is connected, and the source electrode of the switching tube S4 is connected with the drain electrode of the switching tube S3, described to open
Close source electrode and the soft starting circuit cathode output end phase tandem of pipe S2 source electrode and the switching tube S3.
In the present embodiment, the lead-out wire of the switching tube S1 and the switching tube S2 tie point and the high frequency transformation
One end of device TR armature windings is connected, lead-out wire and the high frequency of the switching tube S4 and the switching tube S3 tie point
The other end of TR grades of windings of transformer is connected.
In the present embodiment, the two ends of the high frequency transformer TR secondary windings respectively with the single-phase output rectifier bridge V2
Two inputs be connected, the output filter capacitor Co be connected in parallel on the single-phase output rectifier bridge V2 two output ends it
Between, the load resistance Ro is connected in parallel between two end points of the filter capacitor Co.
Gather converter output voltage Vout, input current Iin and the single-phase input rectifier bridge V1 output voltage Vin
Digitial controller is together inputted, the Digital Control System of outer voltage current inner loop is constituted, digitial controller is believed according to sampling
Number carry out PI modulation, four opening for main switch are controlled with shut-off.
Described digitial controller uses dsp controller, and DSP resource allocation is：PFC (PFC) Working mould
During formula, drive waveforms are distributed as follows, and PWM3, PWM4, PWM7, PWM8 provide S1, S2, S3 and S4 drive signal respectively.Signal
It is allocated as follows, PWM3 and PWM4 drives S1 and S3, PWM7 to drive S2 and S4 with PWM8；During soft start mode of operation, DSP output
PWM3, PWM4, PWM7, PWM8 are operated in I/O port output mode, and main switch S1, S2, S3 and S4 drive signal are provided respectively.
A kind of work of full digital full-bridge isolated single-phase single-grade PFC (PFC) converter of the present invention is former
Reason：For the ease of analysis, make following hypothesis：Transformer former secondary no-load voltage ratio is n: 1, and all devices are perfect condition.Hereafter institute
The principle Analysis stated is to be assumed to basis with above-mentioned, and key operation waveforms figure is as shown in Figure 2.Vgs1 in figure, Vgs2,
Vgs3 and Vgs4 are respectively main switch S1-S4 drive signal, and wherein S1 is consistent with S3 drive signal, S2 and S4 driving letter
It is number consistent.Vp is primary voltage of transformer waveform, and Vo is transformer secondary output voltage, and IL is input inductive current waveform, and T is fixed
Justice is the work period of PFC (PFC), i.e. the inductance work period, Tsw is switching frequency, i.e. transformer work week
Phase.Waveform shown in Fig. 2 indicates the mode of operation of switching tube and the relation of inductive current mode of operation.When four masters of circuit open
Close all open-minded, i.e., the overlapping region of the drive signals of four pipes as shown in Figure 2, the input voltage after rectifier bridge is to inductance
Charged, inductance storage energy, therefore the region is defined as the dutycycle of the present embodiment.In the present embodiment switching tube S1 with
When S3 or S2 and S4 is opened simultaneously, i.e., during the t1 or t2 shown in Fig. 2, the secondary rectifier bridge work of transformer, electricity
Inducing current declines, and input inductance conveys energy by transformer to output end.
Fig. 3 is the Digital Control System block diagram of the present embodiment, and Vout is a kind of single-phase list of full digital full-bridge isolated
The output voltage of level PFC (PFC) converter, Vin is single-phase input rectifier bridge V1 output voltage, and Iin is conversion
The input current of device, Vref is the reference output voltage of converter.DSP digitial controllers are operationally by A/D to input electricity
Pressure, electric current and output voltage are sampled, and then control program first carries out Fig. 3 outer voltage modulation, then carries out current inner loop
Modulation：Sampling is obtained into output voltage Vout and converter reference output voltage Vref to compare, PI controls are carried out, then by PI
Output valve be multiplied with single-phase input rectifier bridge V1 output voltage Vin by multiplier；Using the output Iref of multiplier as
The reference of current inner loop is compared with input current Iin, carries out PI controls, and the PI outputs controlled are mended by algorithm
Repay, the value after compensation is exported into PWM ripples by a PWM module, then go to control turning on and off for main switch.
Main program flow chart is illustrated in figure 4, it is as follows to release digital control process according to this diagram：
At the beginning of 1. main program completes initial work, including system initialization, AD initialization, EV module initializations, CAPTURE
Beginningization.
2. PFC (PFC) carries out soft start, into soft start mode of operation.
3. judge whether soft start succeeds, ingoing power factor correcting (PFC) mode of operation if success, if soft start loses
Lose, then it is irrecoverable power-off operation that shutdown, which enters circulation,.
4. after ingoing power factor correcting (PFC) pattern, in A/D interrupts service, sampled value has been carried out in real time
Update, in main program cycle, input current and output voltage are detected in real time, the excessively stream for carrying out input current is protected
Shield, the overvoltage protection of output voltage and under-voltage protection.After soft start, it is necessary to ensure output voltage stabilization before load is thrown
In certain scope, therefore the protection of output voltage has the protection point and output voltage of two value points, i.e. output voltage
Recovery point.
If excessively stream, it is irrecoverable power-off operation that shutdown, which enters circulation, and inductance does not recharge, directly secondary is put
Electricity, i.e., whole converter is operated in full-bridge DC/DC patterns, and when inductive current maximum decreases to about 5A, inductance is no longer
Output end is discharged, i.e., main switch drive signal is all set to low.Inductive current is unloaded by the discharge part of primary side and bled off.
If over-pressed, into overvoltage protection, the drive waveforms step-down of main switch, i.e. inductance is not recharged, while transformer
Primary side does not transmit energy to secondary, and whether cycle criterion output voltage reaches recovery value, reentered if recovering power because
Number correction (PFC) mode of operation.
If under-voltage, enter under-voltage protection and start, the drive waveforms of main switch are recovered again, induction charging and transformer
Primary side re-starts soft start to secondary transmission energy.
The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the invention, it is all the present invention's
Any modifications, equivalent substitutions and improvements made within spirit and principle etc., should be included in the scope of the protection.
Claims (2)
1. a kind of full digital full-bridge isolated single-phase single-grade PFC (PFC) converter, including single-phase input rectification
Bridge V1, input capacitance Cin, soft starting circuit, input inductance Lin, main switch S1~S4, high frequency transformer TR, single-phase output
Rectifier bridge V2, output filter capacitor Co, load resistance Ro.Control section employs full digital control method, adds one entirely
Numerical control system.The positive terminal of the single-phase input rectifier bridge V1 and the upper end of the input capacitance Cin, soft start electricity
The input upper end phase tandem on road, the lower end of the input capacitance Cin and single-phase input rectifier bridge V1 negative pole end, soft starting circuit
The phase tandem of input lower end.The cathode output end of the soft starting circuit is connected with inputting inductance Lin front end, inputs inductance
Lin rear end and the drain electrode of the switching tube S1 and switching tube S4 drain electrode phase tandem, the source electrode of the switching tube S1 with it is described
Switching tube S2 drain electrode is connected, and the source electrode of the switching tube S4 is connected with the drain electrode of the switching tube S3, the switching tube
S2 source electrode and the switching tube S3 source electrode and the soft starting circuit cathode output end phase tandem.The switching tube S1 and institute
The lead-out wire for stating switching tube S2 tie point is connected with one end of the high frequency transformer TR armature windings, the switching tube S4
It is connected with the lead-out wire of the tie point of the switching tube S3 with the other end of the high frequency transformer TR armature windings.The height
Two inputs of the two ends of frequency power transformer TR secondary windings respectively with the single-phase output rectifier bridge V2 are connected, the output
Filter capacitor Co is connected in parallel between two output ends of the single-phase output rectifier bridge V2, and the load resistance Ro is connected in parallel on described
Between filter capacitor Co two end points.
2. full digital the PFC of full-bridge isolated single-phase single-grade (PFC) converter according to patent requirements 1, its
It is characterised by being also added into a Digital Control System, collection converter output voltage Vout, input current Iin and the list
Phase input rectifying bridge V1 output voltage Vin together inputs digitial controller, constitutes the digital control of outer voltage current inner loop
System processed, carries out PI modulation according to sampled signal, four opening for main switch is controlled with shut-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412341.3A CN107171544A (en) | 2017-05-23 | 2017-05-23 | A kind of full digital full-bridge isolated single-phase single-grade PFC（PFC）Converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412341.3A CN107171544A (en) | 2017-05-23 | 2017-05-23 | A kind of full digital full-bridge isolated single-phase single-grade PFC（PFC）Converter |
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| CN107171544A true CN107171544A (en) | 2017-09-15 |
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Cited By (6)
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|---|---|---|---|---|
| CN107947553A (en) * | 2017-12-25 | 2018-04-20 | 安徽天瑞电子科技有限公司 | A kind of safety device of electric vehicle electric door lock start-up circuit and method |
| CN108777545A (en) * | 2018-04-28 | 2018-11-09 | 西安中车永电电气有限公司 | A kind of guide rail car phase-shifting full-bridge charger transformer bias inhibition control method |
| CN110492746A (en) * | 2019-08-23 | 2019-11-22 | 四川甘华电源科技有限公司 | A kind of 2 stage converter and its control method of wide input voltage range |
| CN111740572A (en) * | 2020-08-10 | 2020-10-02 | 深圳第三代半导体研究院 | Peak current mode controller with double-loop control structure and switching power supply |
| CN113036765A (en) * | 2021-03-30 | 2021-06-25 | 国网河北省电力有限公司雄安新区供电公司 | Direct-current magnetic bias suppression device, method and control system |
| CN114552988A (en) * | 2022-03-02 | 2022-05-27 | 电子科技大学 | Soft start method of Buck type power factor correction circuit |
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| CN113036765A (en) * | 2021-03-30 | 2021-06-25 | 国网河北省电力有限公司雄安新区供电公司 | Direct-current magnetic bias suppression device, method and control system |
| CN114552988A (en) * | 2022-03-02 | 2022-05-27 | 电子科技大学 | Soft start method of Buck type power factor correction circuit |
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