CN106385173A - Three-path forward voltage output single-stage bridgeless CukPFC converter and control method thereof - Google Patents
Three-path forward voltage output single-stage bridgeless CukPFC converter and control method thereof Download PDFInfo
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- CN106385173A CN106385173A CN201611079375.7A CN201611079375A CN106385173A CN 106385173 A CN106385173 A CN 106385173A CN 201611079375 A CN201611079375 A CN 201611079375A CN 106385173 A CN106385173 A CN 106385173A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
-
- 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
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
-
- 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 relate to a three-path forward voltage output single-stage bridgeless Cuk PFC converter and a control method thereof. Compared with a traditional Cuk PFC converter, the three-path forward voltage output single-stage bridgeless CukPFC converter can completely eliminate a diode rectifier bridge, only adopts a single input inductor, has a high inductance utilization rate, can realize reliable three-path forward voltage output, solves a problem of reverse voltage output of Cuk topology and does not has cross influence between paths. The three-path forward voltage output single-stage bridgeless Cuk PFC converter works under a DCM mode, enables input current to naturally follow input voltage, realizes a unit power factor, and has characteristics of high efficiency, high power density and high reliability.
Description
Technical field
The present invention relates to a kind of three road forward voltage output single-stage no bridge Cuk pfc converter and its control methods, it is suitable for
In low pressure small-power occasion, belong to converters technical field.
Background technology
With the development of Power Electronic Technique, substantial amounts of power electronic product is applied, the harmonic pollution of power system
Problem just receives significant attention.Alternating current is changed into galvanic power electronics as one kind and becomes by power factor correcting converter
Changing device, realizes the regulation conversion of voltage, in uninterruptible power system, electronic machine instrument while realizing unity power factor
The numerous areas such as table, all types of industries control device, LED illumination play pivotal role.Traditional Boost PFC is due to Boost electricity
The inherent character on road, can only realize boosting inverter, and will obtain low pressure output then needs cascade DC-DC converter to realize blood pressure lowering tune
Section, efficiency is low, high cost.According to Buck PFC single-stage realize, need to solve input voltage be less than output voltage and produce dead
Area's problem, and Buck PFC input current is discontinuous, the raising of impact power factor.Cuk PFC is compared with other topological structure
Relatively, there is following advantage：Because it has input and output inductance, make that input and output electric current is all continuous, THD is little, reduce wave filter
Volume, start and when transshipping can surge current suppression, relatively low EMI impact etc..And traditional rectifier bridge+Cuk PFC conversion
Device, the conduction loss of front end rectifier bridge reduces the efficiency of changer to a great extent, especially when low pressure inputs.Want
Improve the efficiency of changer, reduce conduction loss, the power device number in current flow paths must reduce.Thus, eliminate
Front end diode rectifier bridge is the primary link improving overall efficiency.Simultaneously in all kinds of electronic instruments and industrial control equipment
In, generally require multi-voltage grade output, traditional way is the two-stage that prime pfc converter cascades multiple DC-DC converter
Conversion, this mode efficiency is low, high cost.Directly by PFC single-stage realize multiple-channel output research still rare, for this reason, research
Possess high efficiency, High Power Factor, multiple-channel output single-stage Bridgeless power factor correction converter significant.
Content of the invention
It is an object of the invention to provide a kind of three road forward voltage output single-stage no bridge Cuk pfc converter and its controls
Method, to overcome defect present in prior art.
For achieving the above object, the technical scheme is that：A kind of three road forward voltage output single-stage no bridge Cuk PFC
Changer, including：Line voltage Vac, the first inductance L1, the second inductance L2, the 3rd inductance L3, the first electric capacity C1, the second electric capacity
C2, the 3rd electric capacity Co1, the 4th electric capacity Co2, the 5th electric capacity Co3, first switch pipe Qm1, second switch pipe Qm2, the 3rd switching tube
Qs1, the 4th switching tube Qs2, the 5th switching tube Qs3, the first diode Dm1, the second diode Dm2, the 3rd diode Ds1,
Four diode Ds2, the 5th diode Ds3；One end of one end incoming transport line voltage Vac of described first inductance L1, described
The other end of the first inductance L1 is connected with the source electrode of described first switch pipe Qm1 and one end of described first electric capacity C1 respectively；
The other end of described line voltage Vac is connected with the source electrode of described second switch pipe Qm2 and one end of the second electric capacity C2；Described
The other end of the first electric capacity C1 is connected with the negative electrode of described first diode Dm1 and one end of the second inductance L2 respectively；Described
The other end of the second electric capacity C2 is connected with the negative electrode of described second diode Dm2 and one end of described 3rd inductance L3 respectively；
The other end of described second inductance L2 respectively with the other end of described 3rd inductance L3, the drain electrode of described 3rd switching tube Qs1, institute
The drain electrode of the drain electrode and described 5th switching tube Qs3 of stating the 4th switching tube Qs2 connects；The source electrode of described 3rd switching tube Qs1
It is connected with the anode of described 3rd diode Ds1；The source electrode of described 4th switching tube Qs2 and the sun of described 4th diode Ds2
Pole connects；The source electrode of described 5th switching tube Qs3 is connected with the anode of described 5th diode Ds3；Described 3rd diode Ds1
Negative electrode be connected with one end of one end of described electric capacity Co1 and the first load R1 respectively；The negative electrode of described 4th diode Ds2
It is connected with one end of described 4th electric capacity Co2 and one end of the second load R2 respectively；The negative electrode of described 5th diode Ds3 divides
It is not connected with one end of described 5th electric capacity Co3 and one end of the 3rd load R3；The drain electrode of described first switch pipe Qm1, institute
State the drain electrode of second switch pipe Qm2, the anode of described first diode Dm1, the anode of described second diode Dm2, described
The other end of three electric capacity Co1, the other end of described 4th electric capacity Co2, the other end of described 5th electric capacity Co3, described first negative
The other end of load R1, the other end of described second load R2, the other end of described 3rd load R3 connect, and are grounded；Described
The grid of one switching tube Qm1 to described 5th switching tube Qs3 is connected respectively control signal.
Further, a kind of three road forward voltages are also provided to export the control method of single-stage no bridge Cuk pfc converter, institute
Stating first switch pipe Qm1 and described second switch pipe Qm2 is line voltage positive-negative half-cycle control pipe, described 3rd switching tube
Qs1, described 4th switching tube Qs2 and described 5th switching tube Qs3 are time-sharing multiplex control pipe；When changer works in DCM
During pattern, described ac grid voltage Vac each road output voltage is after predetermined reference voltage corresponding with each road is compared respectively
Obtain error voltage, respectively after PI regulation, then be modulated with sawtooth signal Vsaw respectively, produce corresponding pulse signal
C1, C2 and C3, and the drive signal as described first switch pipe Qm1 or second switch pipe Qm2；One CLK signal is also provided,
This CLK signal produces the driving as described 3rd switching tube Qs1 for the fractional frequency signal of 1/3rd switching frequencies after three frequency division
Signal Vs1, then the fractional frequency signal producing after postponing 1/3rd, 2/3rds switching frequencies respectively is respectively to should be used as described the
Four switching tube Qs2, drive signal Vs2, Vs3 of described 5th switching tube Qs3；Simultaneously drive signal Vs1, Vs2, Vs3 as one
The input of signal selector, and determine in switch periods, described first switch pipe Qm1's and described second switch pipe Qm2
Pwm pulse signal C1, C2 or C3；Again after the judgement of electric network positive and negative half cycle, output is corresponding to account for for the output of described signal selector
Sky is than signal to described first switch pipe Qm1 or described second switch pipe Qm2.
Further, in an embodiment of the present invention, including following operation mode：
First line voltage positive half cycle operation mode：Described second switch pipe Qm2 and body two pole of described first switch pipe Qm1
Pipe turns on, described first diode Dm1, described second diode Dm2 cut-off, and described first inductance L1 electric current is linearly increasing, institute
State the second electric capacity C2 to described 3rd inductance L3 electric discharge, described 3rd inductance L3 electric current is linearly increasing；
Second line voltage positive half cycle operation mode：Described second switch pipe Qm2 turns off, the body two of described first switch pipe Qm1
Pole pipe turns on, described first diode Dm1 cut-off, and described second diode Dm2 begins to turn on, described first inductance inductance L1 electricity
Cleanliness reduces, and described second electric capacity C2 charges, and described 3rd inductance L3 electric current linearly reduces；
The positive half cycle operation mode of 3rd line voltage：This mode starts from described second diode Dm2 and turns off the moment；In this mode
In, described second switch pipe Qm2 cut-off, the body diode conducting of described first switch pipe Qm1, described first diode Dm1 cuts
Only, described first inductance L1 and described 3rd inductance L3 is equivalent to current source, and its two ends steady state voltage is zero；Described second electricity
Hold C2 to charge, described 3rd electric capacity Co1 to described 5th electric capacity Co3 divides to corresponding load discharge；
First line voltage negative half period operation mode：Described first switch pipe Qm1 and body two pole of described second switch pipe Qm2
Pipe turns on, described first diode Dm1, described second diode Dm2 cut-off, and described first inductance L1 electric current is linearly increasing, institute
State the first electric capacity C1 to described second inductance L2 electric discharge, described second inductance L2 electric current is linearly increasing；
Second line voltage negative half period operation mode：Described first switch pipe Qm1 turns off, the body two of described second switch pipe Qm2
Pole pipe turns on, described second diode Dm2 cut-off, and described first diode Dm1 begins to turn on, described first inductance L1 electric current line
Property reduce, described first electric capacity C1 charges, and described second inductance L2 electric current linearly reduces；
3rd line voltage negative half period operation mode：This mode starts from described first diode Dm1 and turns off the moment；In this mode
In, described first switch pipe Qm1 cut-off, the body diode conducting of described 2nd Qm2, described second diode Dm2 cut-off, described
First inductance L1 and described second inductance L2 is equivalent to current source, and its two ends steady state voltage is zero；Described first electric capacity C1 fills
Electricity, described 3rd electric capacity Co1 to described 5th electric capacity Co3 divides to corresponding load discharge.
Compared to prior art, the invention has the advantages that：One kind three road forward voltage that the present invention provides is defeated
Go out single-stage no bridge Cuk pfc converter and its control method, completely eliminate diode rectifier bridge, only with single input electricity
Sense, inductance utilization rate is high, and on-state loss is low.Compared to traditional Cuk pfc converter, this changer can achieve that forward voltage is defeated
Go out, solve the backward voltage output problem of Cuk topology.Single-stage non-isolated three is realized by time sharing multiplex control method simultaneously
Road voltage output.This changer works under DCM pattern, input current can be made naturally to follow the tracks of input voltage, realize unit power
Factor, can ensure that the zero current turning-on of main switch and the zero-current switching of main diode simultaneously, efficiently solves main diode
Reverse-recovery problems, improve transducer effciency.
Brief description
Fig. 1 is traditional Cuk pfc circuit structured flowchart.
Fig. 2 is three road forward voltage output single-stage no bridge Cuk pfc converters proposed by the invention.
Fig. 3 is the line voltage positive half cycle equivalent circuit of Fig. 2.
Fig. 4 is the first operation mode schematic diagram during the positive half cycle of line voltage of Fig. 3.
Fig. 5 is the second operation mode schematic diagram during the positive half cycle of line voltage of Fig. 3.
Fig. 6 is the 3rd operation mode schematic diagram during the positive half cycle of line voltage of Fig. 3.
Fig. 7 is the line voltage negative half period equivalent circuit of Fig. 2.
Fig. 8 is the first operation mode schematic diagram during the line voltage negative half period of Fig. 7.
Fig. 9 is the second operation mode schematic diagram during the line voltage negative half period of Fig. 7.
Figure 10 is the 3rd operation mode schematic diagram during the line voltage negative half period of Fig. 7.
Figure 11 is changer time-sharing multiplex control block diagram in one embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
Traditional Cuk DC-DC converter output voltage is negative value, if the Cuk DC-DC converter by two symmetrical work
Be combined into single- stage PFC circuit, its output voltage also be negative value, this just need a negater circuit will be reverse for output voltage after
Feedback control loop can be accessed, increased the complexity of circuit, concrete structure is as shown in Figure 1.
The present invention provides a kind of three road forward voltages output single-stage no bridge Cuk pfc converters, as shown in Fig. 2 by routine
Cuk DC-DC converter in metal-oxide-semiconductor and output diode polarity to falling, then the electrical combination of two symmetrical work are obtained
Arriving, achievable forward voltage output, saving negater circuit, thus saving circuit cost.Pass through time-sharing multiplex controlling party simultaneously
Method realizes the non-isolated three tunnel voltage outputs of single-stage.This changer works under DCM pattern, input current can be made naturally to follow the tracks of defeated
Enter voltage, realize unity power factor, can ensure that the zero current turning-on of main switch and the zero-current switching of main diode simultaneously,
Efficiently solve the reverse-recovery problems of main diode, improve transducer effciency.
As shown in Fig. 2 this three roads forward voltage output single-stage no bridge Cuk pfc converter, including line voltage Vac, electricity
Sense L1, L2, L3, electric capacity C1, C2, Co1, Co2, Co3, switching tube Qm1, Qm2, Qs1, Qs2, Qs3, diode Dm1, Dm2, Ds1,
Ds2、Ds3；One end of ac grid voltage Vac is connected with the source electrode of switching tube Qm1, one end of electric capacity C1 through inductance L1, electrical network
The other end of voltage Vac is connected with the source electrode of switching tube Qm2, one end of electric capacity C2, the other end of described electric capacity C1 and diode
The negative electrode of Dm1, one end of inductance L2 connect, and the other end of described electric capacity C2 is connected with one end of the negative electrode of diode Dm2, inductance L3
Connect, the other end of the other end of described inductance L2 and described inductance L3, the drain electrode of switching tube Qs1, the drain electrode of switching tube Qs2, open
The drain electrode closing pipe Qs3 connects, and described switching tube Qs1 is connected with the anode of diode Ds1, described switching tube Qs2 and diode Ds2
Anode connect, described switching tube Qs3 is connected with the anode of diode Ds3, the negative electrode of described diode Ds1 and electric capacity Co1's
One end, one end of load R1 connect, and the negative electrode of described diode Ds2 is connected with one end of one end of electric capacity Co2, load R2, institute
State the negative electrode of diode Ds3 and one end of one end of electric capacity Co3, load R3 is connected, the drain electrode of described switching tube Qm1 is opened with described
The drain electrode of pass pipe Qm2, the anode of described diode Dm1, the anode of described diode Dm2, the other end of described electric capacity Co1, institute
State the other end of electric capacity Co2, the other end of described electric capacity Co3, the other end of described load R1, the other end of described load R2,
The other end of described load R3 connects, and is grounded.The grid of described switching tube Qm1, Qm2, Qs1, Qs2, Qs3 connects to control to be believed
Number.
It is to allow those skilled in the art further appreciate that three road forward voltage output single-stage no bridge Cuk proposed by the invention
The operation principle of pfc converter, the control method with reference to this changer illustrates.
As shown in figs. 3-10, main switch Qm1, Qm2 are line voltage positive-negative half-cycle control pipe to working method, switching tube
Qs1, Qs2, Qs3 are time-sharing multiplex control pipe.For simplicity, each equivalent circuit all only draws a road output.Line voltage
During positive half cycle, equivalent circuit is as shown in figure 3, Fig. 4-6 show operation mode during the positive half cycle of line voltage.Line voltage bears half
Equivalent circuit when all is as shown in fig. 7, Fig. 8-10 show operation mode during line voltage negative half period.
Line voltage positive half cycle operation mode 1：The body diode conducting of Qm2 and Qm1, diode Dm1, Dm2 end, defeated
Enter inductance L1 electric current linearly increasing, intermediate capacitance C2 is discharged to inductance L3.Inductance L3 electric current is linearly increasing.
Line voltage positive half cycle operation mode 2：Switching tube Qm2 turns off, the body diode conducting of Qm1, and diode Dm1 cuts
Only, diode Dm2 begins to turn on, and input inductance L1 electric current linearly reduces, and intermediate capacitance C2 charges.Inductance L3 electric current linearly subtracts
Little.
Line voltage positive half cycle operation mode 3：This mode starts from diode Dm2 and turns off the moment.In this mode, switch
Pipe Qm2 ends, the body diode conducting of Qm1, and diode Dm1 ends, and inductance L1 and L3 is equivalent to current source, its two ends stable state electricity
Pressure is zero.Electric capacity C2 charges, and output capacitance is to load discharge.
Line voltage negative half period operation mode 1：The body diode conducting of Qm1 and Qm2, diode Dm1, Dm2 end, defeated
Enter inductance L1 electric current linearly increasing, intermediate capacitance C1 is discharged to inductance L2.Inductance L2 electric current is linearly increasing.
Line voltage negative half period operation mode 2：Switching tube Qm1 turns off, the body diode conducting of Qm2, and diode Dm2 cuts
Only, diode Dm1 begins to turn on, and input inductance L1 electric current linearly reduces, and intermediate capacitance C1 charges.Inductance L2 electric current linearly subtracts
Little.
Line voltage negative half period operation mode 3：This mode starts from diode Dm1 and turns off the moment.In this mode, switch
Pipe Qm1 ends, the body diode conducting of Qm2, and diode Dm2 ends, and inductance L1 and L2 is equivalent to current source, its two ends stable state electricity
Pressure is zero.Electric capacity C1 charges, and output capacitance is to load discharge.
When changer works in DCM pattern, introduce time sharing multiplex control method, just can achieve the only of three road output voltages
Vertical control, and there is not cross influence in each output branch road.Time-sharing multiplex control block diagram is as shown in figure 11.Concrete principle is analyzed such as
Under：Output voltage reference voltage corresponding respectively in each road obtains error voltage after being compared, then after PI regulation respectively
It is modulated with sawtooth signal Vsaw, produce respective pulse signal C1, C2, C3 as the driving of main switch Qm1 or Qm2
Signal.CLK signal produces the driving as first via switching tube Qs1 for the fractional frequency signal of 1/3rd switching frequencies after three frequency division
Signal Vs1, more respectively postpone 1/3rd, 2/3rds switching frequencies after produce fractional frequency signal respectively as the second way switch
Pipe Qs2, drive signal Vs2, Vs3 of three-way switch pipe Qs3, Vs1, Vs2, Vs3 come as the input of signal selector simultaneously
Determine pwm pulse signal C1, C2 or C3 of main switch in switch periods.The output of signal selector is again through electric network positive and negative
Half cycle exports corresponding duty cycle signals to switching tube Qm1 or Qm2 after judging.
It is more than presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function is made
With without departing from technical solution of the present invention scope when, belong to protection scope of the present invention.
Claims (3)
1. a kind of three road forward voltage output single-stage no bridge CukPFC changers are it is characterised in that include：Line voltage Vac,
One inductance L1, the second inductance L2, the 3rd inductance L3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity Co1, the 4th electric capacity Co2,
5th electric capacity Co3, first switch pipe Qm1, second switch pipe Qm2, the 3rd switching tube Qs1, the 4th switching tube Qs2, the 5th switch
Pipe Qs3, the first diode Dm1, the second diode Dm2, the 3rd diode Ds1, the 4th diode Ds2, the 5th diode Ds3；
One end of one end incoming transport line voltage Vac of described first inductance L1, the other end of described first inductance L1 respectively with institute
One end of the source electrode and described first electric capacity C1 of stating first switch pipe Qm1 connects；The other end of described line voltage Vac and institute
One end of the source electrode and the second electric capacity C2 of stating second switch pipe Qm2 connects；The other end of described first electric capacity C1 respectively with institute
One end of the negative electrode and the second inductance L2 of stating the first diode Dm1 connects；The other end of described second electric capacity C2 respectively with institute
One end of the negative electrode and described 3rd inductance L3 of stating the second diode Dm2 connects；The other end of described second inductance L2 is respectively
With the other end of described 3rd inductance L3, the drain electrode of described 3rd switching tube Qs1, the drain electrode of described 4th switching tube Qs2 and
The drain electrode of described 5th switching tube Qs3 connects；The source electrode of described 3rd switching tube Qs1 and the anode of described 3rd diode Ds1
Connect；The source electrode of described 4th switching tube Qs2 is connected with the anode of described 4th diode Ds2；Described 5th switching tube Qs3's
Source electrode is connected with the anode of described 5th diode Ds3；The negative electrode of described 3rd diode Ds1 is respectively with described electric capacity Co1's
One end of one end and the first load R1 connects；The negative electrode of described 4th diode Ds2 respectively with described 4th electric capacity Co2 one
One end of end and the second load R2 connects；The negative electrode of described 5th diode Ds3 one end with described 5th electric capacity Co3 respectively
And the 3rd load R3 one end connect；The drain electrode of described first switch pipe Qm1, the drain electrode of described second switch pipe Qm2, described
The anode of the first diode Dm1, the anode of described second diode Dm2, the other end of described 3rd electric capacity Co1, the described 4th
The other end of electric capacity Co2, the other end of described 5th electric capacity Co3, the other end of described first load R1, described second load R2
The other end, the other end of described 3rd load R3 connect, and be grounded；Described first switch pipe Qm1 is to described 5th switching tube
The grid of Qs3 is connected respectively control signal.
2. a kind of control method exporting single-stage no bridge CukPFC changer based on three road forward voltages described in claim 1,
It is characterized in that, described first switch pipe Qm1 and described second switch pipe Qm2 is line voltage positive-negative half-cycle control pipe, institute
Stating the 3rd switching tube Qs1, described 4th switching tube Qs2 and described 5th switching tube Qs3 is time-sharing multiplex control pipe；Work as conversion
When device works in DCM pattern, described ac grid voltage Vac each road output voltage predetermined reference voltage corresponding with each road respectively
Obtain error voltage after being compared, respectively after PI regulation, then be modulated with sawtooth signal Vsaw respectively, produce and correspond to
Pulse signal C1, C2 and C3, and the drive signal as described first switch pipe Qm1 or second switch pipe Qm2；Also provide
One CLK signal, this CLK signal produces the fractional frequency signal of 1/3rd switching frequencies as described 3rd switching tube after three frequency division
The drive signal Vs1 of Qs1, more respectively postpone 1/3rd, 2/3rds switching frequencies after produce fractional frequency signal correspond to respectively
Drive signal Vs2, Vs3 as described 4th switching tube Qs2, described 5th switching tube Qs3；Simultaneously drive signal Vs1, Vs2,
Vs3 is as the input of a signal selector, and determines in switch periods, and described first switch pipe Qm1 and described second opens
Close pwm pulse signal C1, C2 or C3 of pipe Qm2；The output of described signal selector after the judgement of electric network positive and negative half cycle, exports again
Corresponding duty cycle signals extremely described first switch pipe Qm1 or described second switch pipe Qm2.
3. three road forward voltages according to claim 2 export the control method of single-stage no bridge CukPFC changer, and it is special
Levy and be, including following operation mode：
First line voltage positive half cycle operation mode：Described second switch pipe Qm2 and body two pole of described first switch pipe Qm1
Pipe turns on, described first diode Dm1, described second diode Dm2 cut-off, and described first inductance L1 electric current is linearly increasing, institute
State the second electric capacity C2 to described 3rd inductance L3 electric discharge, described 3rd inductance L3 electric current is linearly increasing；
Second line voltage positive half cycle operation mode：Described second switch pipe Qm2 turns off, the body two of described first switch pipe Qm1
Pole pipe turns on, described first diode Dm1 cut-off, and described second diode Dm2 begins to turn on, described first inductance inductance L1 electricity
Cleanliness reduces, and described second electric capacity C2 charges, and described 3rd inductance L3 electric current linearly reduces；
The positive half cycle operation mode of 3rd line voltage：This mode starts from described second diode Dm2 and turns off the moment；In this mode
In, described second switch pipe Qm2 cut-off, the body diode conducting of described first switch pipe Qm1, described first diode Dm1 cuts
Only, described first inductance L1 and described 3rd inductance L3 is equivalent to current source, and its two ends steady state voltage is zero；Described second electricity
Hold C2 to charge, described 3rd electric capacity Co1 to described 5th electric capacity Co3 divides to corresponding load discharge；
First line voltage negative half period operation mode：Described first switch pipe Qm1 and body two pole of described second switch pipe Qm2
Pipe turns on, described first diode Dm1, described second diode Dm2 cut-off, and described first inductance L1 electric current is linearly increasing, institute
State the first electric capacity C1 to described second inductance L2 electric discharge, described second inductance L2 electric current is linearly increasing；
Second line voltage negative half period operation mode：Described first switch pipe Qm1 turns off, the body two of described second switch pipe Qm2
Pole pipe turns on, described second diode Dm2 cut-off, and described first diode Dm1 begins to turn on, described first inductance L1 electric current line
Property reduce, described first electric capacity C1 charges, and described second inductance L2 electric current linearly reduces；
3rd line voltage negative half period operation mode：This mode starts from described first diode Dm1 and turns off the moment；In this mode
In, described first switch pipe Qm1 cut-off, the body diode conducting of described 2nd Qm2, described second diode Dm2 cut-off, described
First inductance L1 and described second inductance L2 is equivalent to current source, and its two ends steady state voltage is zero；Described first electric capacity C1 fills
Electricity, described 3rd electric capacity Co1 to described 5th electric capacity Co3 divides to corresponding load discharge.
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|---|---|---|---|---|
| JP2007194229A (en) * | 2007-04-27 | 2007-08-02 | Hitachi Appliances Inc | Electromagnetic induction heating device |
| CN101895223A (en) * | 2010-06-11 | 2010-11-24 | 燕山大学 | Double-Cuk buck-boost output parallel-type converter |
| CN101958660A (en) * | 2010-10-04 | 2011-01-26 | 燕山大学 | Dual-Sepic buck-boost output parallel combined inverter |
| CN105337488A (en) * | 2015-10-23 | 2016-02-17 | 福州大学 | Novel non-bridge Cuk PFC converter having forward voltage output |
| CN206302336U (en) * | 2016-11-30 | 2017-07-04 | 福州大学 | The DCM of the non-isolated three roads forward voltage output of single-stage is without bridge CukPFC converters |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007194229A (en) * | 2007-04-27 | 2007-08-02 | Hitachi Appliances Inc | Electromagnetic induction heating device |
| CN101895223A (en) * | 2010-06-11 | 2010-11-24 | 燕山大学 | Double-Cuk buck-boost output parallel-type converter |
| CN101958660A (en) * | 2010-10-04 | 2011-01-26 | 燕山大学 | Dual-Sepic buck-boost output parallel combined inverter |
| CN105337488A (en) * | 2015-10-23 | 2016-02-17 | 福州大学 | Novel non-bridge Cuk PFC converter having forward voltage output |
| CN206302336U (en) * | 2016-11-30 | 2017-07-04 | 福州大学 | The DCM of the non-isolated three roads forward voltage output of single-stage is without bridge CukPFC converters |
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| 严百平等: "《改进的电压跟随器PFCCukAC_DC变换器》", 《电工技术学报》 * |
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