CN106385173B - Three road forward voltages export single-stage without bridge CukPFC converter and its control method - Google Patents
Three road forward voltages export single-stage without bridge CukPFC converter and its control method Download PDFInfo
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- CN106385173B CN106385173B CN201611079375.7A CN201611079375A CN106385173B CN 106385173 B CN106385173 B CN 106385173B CN 201611079375 A CN201611079375 A CN 201611079375A CN 106385173 B CN106385173 B CN 106385173B
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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
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of three road forward voltages output single-stages without bridge Cuk pfc converter and its control method.Compared to traditional Cuk pfc converter, which completely eliminates diode rectifier bridge, only with single input inductance, inductance utilization rate is high, the output of reliable three road forward voltage can be achieved, solve the problems, such as the backward voltage output of Cuk topology, and the cross influence on each road is not present.It works under DCM mode, input current can be made to track input voltage naturally, realize unity power factor, have the characteristics that high efficiency, high power density, high reliability.
Description
Technical field
The present invention relates to a kind of three road forward voltages output single-stages without bridge Cuk pfc converter and its control method, is applicable in
In low pressure small-power occasion, belong to converters technical field.
Background technique
With the development of power electronics technology, a large amount of power electronic product is applied, the harmonic pollution of electric system
Problem just receives significant attention.Power factor correcting converter becomes as a kind of power electronics that alternating current is changed into direct current
Changing device realizes the adjusting transformation of voltage, in uninterruptible power system, electronic instrument instrument while realizing unity power factor
The numerous areas such as table, all types of industries control equipment, LED illumination play key effect.Traditional Boost PFC is due to Boost electricity
The inherent characteristic on road can only realize boosting inverter, to obtain low pressure output and then need to cascade DC-DC converter realization decompression tune
Section, it is low efficiency, at high cost.It is realized according to Buck PFC single-stage, input voltage need to be solved and generated dead lower than output voltage
Area's problem, and Buck PFC input current is discontinuous, influences the raising of power factor.Cuk PFC is compared with other topological structures
Compared with there are following advantages: because it is there are input and output inductance, making that input and output electric current is continuous, THD is small, reduce filter
It can inhibit surge current, lower EMI influence etc. when volume, booting and overload.And traditional rectifier bridge+Cuk PFC transformation
Device, the conduction loss of front end rectifier bridge largely reduce the efficiency of converter, especially when low pressure inputs.Want
The efficiency of converter is improved, conduction loss is reduced, the power device number in current flow paths must be reduced.It eliminates as a result,
Front end diode rectifier bridge is the primary link for improving overall efficiency.Simultaneously in all kinds of electronic instruments and industrial control equipment
In, multi-voltage grade output is generally required, traditional way is the two-stage that prime pfc converter cascades multiple DC-DC converters
Transformation, it is this mode low efficiency, at high cost.Directly realize that the research of multiple-channel output is still rare by PFC single-stage, for this purpose, research
Have high efficiency, High Power Factor, multiple-channel output single-stage Bridgeless power factor correction converter be of great significance.
Summary of the invention
The purpose of the present invention is to provide a kind of three road forward voltages output single-stages without bridge Cuk pfc converter and its control
Method, to overcome defect existing in the prior art.
To achieve the above object, the technical scheme is that a kind of three road forward voltages output single-stage is without bridge Cuk PFC
Converter, comprising: network voltage Vac, the first inductance L1, the second inductance L2, third inductance L3, first capacitor C1, the second capacitor
C2, third capacitor Co1, the 4th capacitor Co2, the 5th capacitor Co3, first switch tube Qm1, second switch Qm2, third switching tube
Qs1, the 4th switching tube Qs2, the 5th switching tube Qs3, first diode Dm1, the second diode Dm2, third diode Ds1,
Four diode Ds2, the 5th diode Ds3；One end of one end access ac grid voltage Vac of the first inductance L1, it is described
The other end of first inductance L1 is connect with one end of the source electrode of the first switch tube Qm1 and the first capacitor C1 respectively；
The other end of the network voltage Vac is connect with one end of the source electrode of the second switch Qm2 and the second capacitor C2；It is described
The other end of first capacitor C1 is connect with one end of the cathode of the first diode Dm1 and the second inductance L2 respectively；It is described
The other end of second capacitor C2 is connect with one end of the cathode of the second diode Dm2 and the third inductance L3 respectively；
The other end of the second inductance L2 respectively with the other end of the third inductance L3, the drain electrode of the third switching tube Qs1, institute
State the drain electrode of the 4th switching tube Qs2 and the drain electrode connection of the 5th switching tube Qs3；The source electrode of the third switching tube Qs1
It is connect with the anode of the third diode Ds1；The source electrode of the 4th switching tube Qs2 and the sun of the 4th diode Ds2
Pole connection；The source electrode of the 5th switching tube Qs3 is connect with the anode of the 5th diode Ds3；The third diode Ds1
Cathode respectively with one end of the capacitor Co1 and first load R1 one end connect；The cathode of the 4th diode Ds2
It is connect respectively with one end of one end of the 4th capacitor Co2 and the second load R2；The cathode of the 5th diode Ds3 point
It is not connect with one end of one end of the 5th capacitor Co3 and third load R3；The drain electrode of the first switch tube Qm1, institute
State the drain electrode of second switch Qm2, the anode of the first diode Dm1, the anode of the second diode Dm2, described
It is the other end of three capacitor Co1, the other end of the 4th capacitor Co2, the other end of the 5th capacitor Co3, described first negative
The other end connection of the other end of R1, the other end, third load R3 of the second load R2 is carried, and is grounded；Described
The grid of one switching tube Qm1 to the 5th switching tube Qs3 are connected respectively control signal.
Further, a kind of three road forward voltages output control method of the single-stage without bridge Cuk pfc converter, institute are also provided
Stating the first switch tube Qm1 and second switch Qm2 is network voltage positive-negative half-cycle control pipe, the third switching tube
Qs1, the 4th switching tube Qs2 and the 5th switching tube Qs3 are time-sharing multiplex control pipe；When converter works in DCM
When mode, each road output voltage of ac grid voltage Vac is after predetermined reference voltage corresponding with each road is compared respectively
Error voltage is obtained, respectively after PI is adjusted, then is modulated respectively with sawtooth signal Vsaw, generates corresponding pulse signal
C1, C2 and C3, and the driving signal as the first switch tube Qm1 or second switch Qm2；One CLK signal is also provided,
The CLK signal generates driving of the fractional frequency signal of one third switching frequency as the third switching tube Qs1 after three frequency division
Signal Vs1, then postpone one third respectively, the fractional frequency signal that generates after 2/3rds switching frequencies is respectively corresponded as described the
Driving signal Vs2, Vs3 of four switching tube Qs2, the 5th switching tube Qs3；Driving signal Vs1, Vs2, Vs3 are as one simultaneously
The input of signal selector, and determine in a switch periods, the first switch tube Qm1 and the second switch Qm2's
Pwm pulse signal C1, C2 or C3；The output of the signal selector after the judgement of electric network positive and negative half cycle, exports corresponding account for again
Sky is than signal to the first switch tube Qm1 or the second switch Qm2.
Including following operation mode further, in an embodiment of the present invention:
First network voltage positive half cycle operation mode: the body of the second switch Qm2 and the first switch tube Qm1
Diode current flow, the first diode Dm1, the second diode Dm2 cut-off, the first inductance L1 electric current linearly increase
Add, the second capacitor C2 discharges to the third inductance L3, and the third inductance L3 electric current is linearly increasing；
Second network voltage positive half cycle operation mode: the second switch Qm2 shutdown, the first switch tube Qm1's
Body diode conducting, the first diode Dm1 cut-off, the second diode Dm2 are begun to turn on, the first inductance inductance
L1 electric current linearly reduces, and the second capacitor C2 charging, the third inductance L3 electric current linearly reduces；
Third network voltage positive half cycle operation mode: this mode starts from the second diode Dm2 shutdown moment；Herein
In mode, the second switch Qm2 cut-off, the body diode conducting of the first switch tube Qm1, the first diode
Dm1 cut-off, the first inductance L1 and the third inductance L3 are equivalent to current source, and both ends steady state voltage is zero；It is described
Second capacitor C2 charging, the third capacitor Co1 to the 5th capacitor Co3 divide to corresponding load discharge；
First network voltage negative half period operation mode: the body of the first switch tube Qm1 and the second switch Qm2
Diode current flow, the first diode Dm1, the second diode Dm2 cut-off, the first inductance L1 electric current linearly increase
Add, the first capacitor C1 discharges to the second inductance L2, and the second inductance L2 electric current is linearly increasing；
Second network voltage negative half period operation mode: the first switch tube Qm1 shutdown, the second switch Qm2's
Body diode conducting, the second diode Dm2 cut-off, the first diode Dm1 are begun to turn on, the first inductance L1 electricity
Cleanliness reduces, and the first capacitor C1 charging, the second inductance L2 electric current linearly reduces；
Third network voltage negative half period operation mode: this mode starts from the first diode Dm1 shutdown moment；Herein
In mode, the first switch tube Qm1 cut-off, the body diode conducting of the 2nd Qm2, the second diode Dm2 cut-off,
The first inductance L1 and the second inductance L2 are equivalent to current source, and both ends steady state voltage is zero；The first capacitor
C1 charging, the third capacitor Co1 to the 5th capacitor Co3 divide to corresponding load discharge.
Compared to the prior art, the invention has the following advantages: a kind of three road forward voltage provided by the invention is defeated
Single-stage completely eliminates diode rectifier bridge without bridge Cuk pfc converter and its control method out, only with single input electricity
Sense, inductance utilization rate is high, and on-state loss is low.Compared to traditional Cuk pfc converter, which can realize that forward voltage is defeated
Out, the backward voltage output of Cuk topology is solved the problems, such as.Single-stage non-isolated three is realized by time sharing multiplex control method simultaneously
Road voltage output.The converter works under DCM mode, and input current can be made to track input voltage naturally, realizes unit power
Factor, while can ensure that the zero current turning-on of main switch and the zero-current switching of main diode, efficiently solve main diode
Reverse-recovery problems, improve transducer effciency.
Detailed description of the invention
Fig. 1 is tradition Cuk pfc circuit structural block diagram.
Fig. 2 is that three road forward voltages proposed by the invention export single-stage without bridge Cuk pfc converter.
Fig. 3 is the network voltage positive half cycle equivalent circuit of Fig. 2.
First operation mode schematic diagram when Fig. 4 is the network voltage positive half cycle of Fig. 3.
Second operation mode schematic diagram when Fig. 5 is the network voltage positive half cycle of Fig. 3.
Third operation mode schematic diagram when Fig. 6 is the network voltage positive half cycle of Fig. 3.
Fig. 7 is the network voltage negative half period equivalent circuit of Fig. 2.
First operation mode schematic diagram when Fig. 8 is the network voltage negative half period of Fig. 7.
Second operation mode schematic diagram when Fig. 9 is the network voltage negative half period of Fig. 7.
Third operation mode schematic diagram when Figure 10 is the network voltage negative half period of Fig. 7.
Figure 11 is converter time-sharing multiplex control block diagram in one embodiment of the invention.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
Traditional Cuk DC-DC converter output voltage is negative value, if the Cuk DC-DC converter that two are symmetrically worked
Be combined into single- stage PFC circuit, output voltage is also negative value, this just need a negater circuit by output voltage it is reversed after
Feedback control loop can be accessed, the complexity of circuit is increased, specific structure is as shown in Figure 1.
The present invention provides one kind three road forward voltages output single-stage without bridge Cuk pfc converter, as shown in Fig. 2, by conventional
Cuk DC-DC converter in metal-oxide-semiconductor and output diode polarity obtained to falling, then by the electrical combination that two symmetrically work
To, it can be achieved that forward voltage output, saves negater circuit, to save circuit cost.Pass through time-sharing multiplex controlling party simultaneously
Method realizes the non-isolated three tunnels voltage output of single-stage.The converter works under DCM mode, input current can be made to track naturally defeated
Enter voltage, realize unity power factor, while can ensure that the zero current turning-on of main switch and the zero-current switching of main diode,
The reverse-recovery problems for efficiently solving main diode, improve transducer effciency.
As shown in Fig. 2, the three roads forward voltage exports single-stage without bridge Cuk pfc converter, including network voltage Vac, electricity
Feel L1, L2, L3, capacitor 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 connect through inductance L1 with one end of the source electrode of switching tube Qm1, capacitor C1, power grid
The other end of voltage Vac is connect with one end of the source electrode of switching tube Qm2, capacitor C2, the other end and diode of the capacitor C1
One end connection of the cathode, inductance L2 of Dm1, the other end and the cathode of diode Dm2, one end of inductance L3 of the capacitor C2 connect
It connects, the drain electrode of the other end of the inductance L2 and the other end, switching tube Qs1 of the inductance L3, is opened at the drain electrode of switching tube Qs2
The drain electrode connection of pipe Qs3 is closed, the switching tube Qs1 is connect with the anode of diode Ds1, the switching tube Qs2 and diode Ds2
Anode connection, the switching tube Qs3 connect with the anode of diode Ds3, and the cathode of the diode Ds1 is with capacitor Co1's
One end, one end connection for loading R1, the cathode of the diode Ds2 are connect with one end of one end of capacitor Co2, load R2, institute
The cathode for stating diode Ds3 is connect with one end of one end of capacitor Co3, load R3, and the drain electrode of the switching tube Qm1 is opened with described
Close the drain electrode of pipe Qm2, the anode of the diode Dm1, the anode of the diode Dm2, the other end of the capacitor Co1, institute
State the other end of capacitor Co2, the other end of the capacitor Co3, it is described load R1 the other end, it is described load R2 the other end,
The other end connection of the load R3, and be grounded.The grid connection control letter of described switching tube Qm1, Qm2, Qs1, Qs2, Qs3
Number.
To allow those skilled in the art to further appreciate that, three road forward voltages proposed by the invention export single-stage without bridge Cuk
The working principle of pfc converter is illustrated below with reference to the control method of the converter.
As shown in figs. 3-10, main switch Qm1, Qm2 are network voltage positive-negative half-cycle control pipe, switching tube to working method
Qs1, Qs2, Qs3 are time-sharing multiplex control pipe.For simplicity, each equivalent circuit is only drawn exports all the way.Network voltage
Equivalent circuit when positive half cycle is as shown in figure 3, operation mode when Fig. 4-6 show network voltage positive half cycle.Network voltage negative half
Equivalent circuit when all is as shown in fig. 7, operation mode when Fig. 8-10 show network voltage negative half period.
The body diode of network voltage positive half cycle operation mode 1:Qm2 and Qm1 are connected, diode Dm1, Dm2 cut-off, defeated
It is linearly increasing to enter inductance L1 electric current, intermediate capacitance C2 discharges to inductance L3.Inductance L3 electric current is linearly increasing.
Network voltage positive half cycle operation mode 2: switching tube Qm2 shutdown, the body diode conducting of Qm1, diode Dm1 are cut
Only, diode Dm2 is begun to turn on, and input inductance L1 electric current linearly reduces, intermediate capacitance C2 charging.Inductance L3 electric current linearly subtracts
It is small.
Network voltage positive half cycle operation mode 3: this mode starts from the diode Dm2 shutdown moment.In this mode, switch
Pipe Qm2 cut-off, the body diode conducting of Qm1, diode Dm1 cut-off, inductance L1 and L3 are equivalent to current source, both ends stable state electricity
Pressure is zero.Capacitor C2 charging, output capacitance is to load discharge.
The body diode of network voltage negative half period operation mode 1:Qm1 and Qm2 are connected, diode Dm1, Dm2 cut-off, defeated
It is linearly increasing to enter inductance L1 electric current, intermediate capacitance C1 discharges to inductance L2.Inductance L2 electric current is linearly increasing.
Network voltage negative half period operation mode 2: switching tube Qm1 shutdown, the body diode conducting of Qm2, diode Dm2 are cut
Only, diode Dm1 is begun to turn on, and input inductance L1 electric current linearly reduces, intermediate capacitance C1 charging.Inductance L2 electric current linearly subtracts
It is small.
Network voltage negative half period operation mode 3: this mode starts from the diode Dm1 shutdown moment.In this mode, switch
Pipe Qm1 cut-off, the body diode conducting of Qm2, diode Dm2 cut-off, inductance L1 and L2 are equivalent to current source, both ends stable state electricity
Pressure is zero.Capacitor C1 charging, output capacitance is to load discharge.
When converter works in DCM mode, time sharing multiplex control method is introduced, can realize the only of three road output voltages
Vertical control, and cross influence is not present in each output branch.Time-sharing multiplex control block diagram is as shown in figure 11.Concrete principle is analyzed such as
Under: each road output voltage obtains error voltage after corresponding reference voltage is compared respectively, then after PI is adjusted respectively
It is modulated with sawtooth signal Vsaw, generates the driving of respective pulse signal C1, C2, C3 as main switch Qm1 or Qm2
Signal.CLK signal generates driving of the fractional frequency signal of one third switching frequency as first via switching tube Qs1 after three frequency division
Signal Vs1, then the fractional frequency signal for postponing to generate after one third, 2/3rds switching frequencies respectively is respectively as the second way switch
Driving signal Vs2, Vs3 of pipe Qs2, third way switch pipe Qs3, while Vs1, Vs2, Vs3 come as the input of signal selector
Determine pwm pulse signal C1, C2 or C3 of main switch in a switch periods.The output of signal selector is again through electric network positive and negative
Corresponding duty cycle signals, which are exported, after half cycle judgement gives switching tube Qm1 or Qm2.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (3)
1. the DCM of the non-isolated three roads forward voltage output of single-stage is without bridge Cuk pfc converter characterized by comprising power grid
Voltage Vac, the first inductance L1, the second inductance L2, third inductance L3, first capacitor C1, the second capacitor C2, third capacitor Co1,
Four capacitor Co2, the 5th capacitor Co3, first switch tube Qm1, second switch Qm2, third switching tube Qs1, the 4th switching tube
Qs2, the 5th switching tube Qs3, first diode Dm1, the second diode Dm2, third diode Ds1, the 4th diode Ds2,
Five diode Ds3；One end of one end access network voltage Vac of the first inductance L1, the other end of the first inductance L1
It is connect respectively with one end of the source electrode of the first switch tube Qm1 and the first capacitor C1；The network voltage Vac's is another
One end is connect with one end of the source electrode of the second switch Qm2 and the second capacitor C2；The other end of the first capacitor C1
It is connect respectively with one end of the cathode of the first diode Dm1 and the second inductance L2；The other end of the second capacitor C2
It is connect respectively with one end of the cathode of the second diode Dm2 and the third inductance L3；The second inductance L2's is another
One end respectively with the other end of the third inductance L3, the drain electrode of the third switching tube Qs1, the 4th switching tube Qs2
Drain electrode and the drain electrode of the 5th switching tube Qs3 connection；The source electrode and the third diode of the third switching tube Qs1
The anode of Ds1 connects；The source electrode of the 4th switching tube Qs2 is connect with the anode of the 4th diode Ds2；Described 5th opens
The source electrode for closing pipe Qs3 is connect with the anode of the 5th diode Ds3；The cathode of the third diode Ds1 respectively with it is described
One end connection of one end of third capacitor Co1 and the first load R1；The cathode of the 4th diode Ds2 is respectively with described
One end connection of one end of four capacitor Co2 and the second load R2；The cathode of the 5th diode Ds3 is respectively with the described 5th
One end connection of one end of capacitor Co3 and third load R3；The drain electrode of the first switch tube Qm1, the second switch
The drain electrode of Qm2, the anode of the first diode Dm1, the anode of the second diode Dm2, the third capacitor Co1 it is another
One end, the other end of the 4th capacitor Co2, the 5th capacitor Co3 the other end, it is described first load R1 the other end,
The other end connection of the other end, third load R3 of the second load R2, and be grounded；The first switch tube Qm1 is extremely
The grid of the 5th switching tube Qs3 is connected respectively control signal.
2. a kind of DCM based on the non-isolated three roads forward voltage output of single-stage described in claim 1 is converted without bridge Cuk PFC
The control method of device, which is characterized in that the first switch tube Qm1 and second switch Qm2 is that network voltage is positive and negative
Half cycle control pipe, the third switching tube Qs1, the 4th switching tube Qs2 and the 5th switching tube Qs3 are time-sharing multiplex
Control pipe；When converter works in DCM mode, each road output voltage of network voltage Vac is corresponding with each road pre- respectively
If reference voltage obtains error voltage after being compared, respectively after PI is adjusted, then adjusted respectively with sawtooth signal Vsaw
System, generates corresponding pulse signal C1, C2 and C3, and the driving as the first switch tube Qm1 or second switch Qm2
Signal；A CLK signal is also provided, which generates the fractional frequency signal of one third switching frequency as institute after three frequency division
The driving signal Vs1 of third switching tube Qs1 is stated, then postpones the frequency dividing generated after one third, 2/3rds switching frequencies respectively
Signal respectively corresponds driving signal Vs2, Vs3 as the 4th switching tube Qs2, the 5th switching tube Qs3；It drives simultaneously
The input of signal Vs1, Vs2, Vs3 as a signal selector, and determine a switch periods in, the first switch tube Qm1 with
And pwm pulse signal C1, C2 or C3 of the second switch Qm2；The output of the signal selector again through network voltage just
After negative half period judgement, corresponding duty cycle signals are exported to the first switch tube Qm1 or second switch Qm2.
3. the DCM of the non-isolated three roads forward voltage output of single-stage according to claim 2 is without bridge Cuk pfc converter
Control method, which is characterized in that including following operation mode:
First network voltage positive half cycle operation mode: two pole of body of the second switch Qm2 and first switch tube Qm1
Pipe conducting, the first diode Dm1, the second diode Dm2 cut-off, the first inductance L1 electric current is linearly increasing, institute
It states the second capacitor C2 to discharge to the third inductance L3, the third inductance L3 electric current is linearly increasing；
Second network voltage positive half cycle operation mode: the second switch Qm2 shutdown, the body two of the first switch tube Qm1
Pole pipe conducting, the first diode Dm1 cut-off, the second diode Dm2 are begun to turn on, the first inductance L1 current line
Property reduce, the second capacitor C2 charging, the third inductance L3 electric current linearly reduces；
Third network voltage positive half cycle operation mode: this mode starts from the second diode Dm2 shutdown moment；In this mode
In, the second switch Qm2 cut-off, the body diode conducting of the first switch tube Qm1, the first diode Dm1 sections
Only, the first inductance L1 and the third inductance L3 are equivalent to current source, and both ends steady state voltage is zero；Second electricity
Hold C2 charging, the third capacitor Co1 to the 5th capacitor Co3 divides to corresponding load discharge；
First network voltage negative half period operation mode: two pole of body of the first switch tube Qm1 and second switch Qm2
Pipe conducting, the first diode Dm1, the second diode Dm2 cut-off, the first inductance L1 electric current is linearly increasing, institute
It states first capacitor C1 to discharge to the second inductance L2, the second inductance L2 electric current is linearly increasing；
Second network voltage negative half period operation mode: the first switch tube Qm1 shutdown, the body two of the second switch Qm2
Pole pipe conducting, the second diode Dm2 cut-off, the first diode Dm1 are begun to turn on, the first inductance L1 current line
Property reduce, first capacitor C1 charging, the second inductance L2 electric current linearly reduces；
Third network voltage negative half period operation mode: this mode starts from the first diode Dm1 shutdown moment；In this mode
In, the first switch tube Qm1 cut-off, the body diode conducting of the second switch Qm2, the second diode Dm2 sections
Only, the first inductance L1 and the second inductance L2 are equivalent to current source, and both ends steady state voltage is zero；First electricity
Hold C1 charging, the third capacitor Co1 to the 5th capacitor Co3 divides to corresponding load discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079375.7A CN106385173B (en) | 2016-11-30 | 2016-11-30 | Three road forward voltages export single-stage without bridge CukPFC converter and its control method |
Applications Claiming Priority (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| JP4284372B2 (en) * | 2007-04-27 | 2009-06-24 | 日立アプライアンス株式会社 | Electromagnetic induction heating device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (1)
| Title |
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| 《改进的电压跟随器PFCCukAC_DC变换器》;严百平等;《电工技术学报》;19990426;第14卷(第2期);全文 |
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