CN107017772B - A kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling - Google Patents
A kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling Download PDFInfo
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- CN107017772B CN107017772B CN201710408912.6A CN201710408912A CN107017772B CN 107017772 B CN107017772 B CN 107017772B CN 201710408912 A CN201710408912 A CN 201710408912A CN 107017772 B CN107017772 B CN 107017772B
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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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost 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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Abstract
A kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling, belongs to voltage transformation field.Solve the problems, such as that traditional two-way DC/DC power converter voltage adjusting range is low compared with small, delivery efficiency and output voltage ripple is big.The present invention includes 3 two-way DC/DC converter monomers, and 3 two-way DC/DC converter monomers are connected in parallel；Coupling inductance L in 3 two-way DC/DC converter monomersrIt is wrapped on same iron core.The two-way DC/DC converter monomer will have five parts composition, it may be assumed that lower-voltage circuit, high pressure lateral circuit, transition circuit, clamp circuit and step-down switching circuit.Present invention is mainly used for voltage conversion is carried out between high-low voltage.
Description
Technical field
The invention belongs to voltage transformation fields.
Background technique
Due to the maturation of HVDC Transmission Technology, direct current transportation itself have it is remote, high-power, be conducive to Power System Interconnection etc.
Characteristic increasingly shows, but the drawbacks of direct current transportation simultaneously is also amplified.Direct current transportation bus and DC load, DC power supply it
Between matching it is often more difficult, therefore two-way DC/DC converter is just needed to carry out the transformation of voltage.DC/DC on the market at present
Converter can satisfy the basic demand in direct current transportation field, but there are still following for current two-way DC/DC converter
Several big problems:
1, traditional two-way DC/DC power converter voltage adjusting range is smaller, in larger or smaller extreme of duty ratio
In the case of the efficiency of power inverter can be relatively low, therefore just lose the meaning of direct current transportation.
2, traditional two-way DC/DC power inverter mostly uses full bridge structure or Buck/Boost structure.Traditional topology
The disadvantages of that there are switching devices is more for structure, control is difficult, bulky, circuit modeling is difficult, while converter is reliable for operation
Property is lower.
3, traditional two-way DC/DC power inverter direct current output ripple is larger, does not meet most direct-flow current consumer ripples
It is required that.
4, in order to reduce the voltage ripple of direct current output, at present there is also the two-way DC/DC converter of Interleaving and Transformer Paralleling,
But in current Interleaving and Transformer Paralleling, parallel units flow relatively difficult, reduction operational reliability.
Summary of the invention
The present invention is that traditional two-way DC/DC power converter voltage adjusting range is smaller, delivery efficiency is low in order to solve
The big problem with output voltage ripple, the present invention provides a kind of two-way DC/DC of high step-up ratio based on Interleaving and Transformer Paralleling to become
Parallel operation.
A kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling, it includes 3 two-way DC/DC transformation
Device monomer, and 3 two-way DC/DC converter monomers are connected in parallel；
Each of described two-way DC/DC converter monomer includes inductance L1, inductance L2, inductance Ls, inductance LP, capacitor C1, electricity
Hold C2, diode D1To D4, power switch tube S1, power switch tube S2And power switch tube S3；
Inductance L2One end and inductance LPOne end connection, inductance L2The other end and diode D2Cathode and power open
Close pipe S2Negative terminal connect simultaneously；
Inductance LPThe other end and inductance LsOne end, diode D1Anode, power switch tube S1Anode connect simultaneously
It connects；
Inductance LsThe other end and capacitor C2One end connection, capacitor C2The other end and diode D3Cathode, power opens
Close pipe S2Anode and power switch tube S3Negative terminal connect simultaneously；
Diode D1Cathode and capacitor C1One end and inductance L1One end connect simultaneously, inductance L1The other end and two
Pole pipe D3Anode and diode D4Cathode connect simultaneously；
Power switch tube S1Negative terminal and diode D2Anode, capacitor C1The other end and diode D4Anode simultaneously
Connection；
Inductance LPWith inductance LsConstitute coupling inductance Lr, and inductance LPFor coupling inductance LrPrimary side, inductance LsFor coupling electricity
Feel LrSecondary side；
The inductance L2One end and power switch tube S1Negative terminal be respectively used to access low-side power VLIt is positive and negative
Pole；
The power switch tube S3Anode and diode D4Anode be respectively used to access high side power VHJust,
Cathode；
Coupling inductance L in 3 two-way DC/DC converter monomersrIt is wrapped on same iron core.
A kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling, further includes capacitor CLAnd electricity
Hold CH；
Capacitor CLBoth ends be respectively connected to low-side power VLPositive and negative electrode,
Capacitor CHBoth ends be respectively connected to high side power VHPositive and negative electrode.
The power switch tube S1, power switch tube S2And power switch tube S3It is NMOS transistor.
The invention has the beneficial effects that:
(1) a kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling of the present invention can realize compared with
High conversion efficiency, reversible transducer delivery efficiency is higher than 95.27% under rated condition, and large-power occasions delivery efficiency more
It is high.Converter bidirectional output voltage ripple is smaller simultaneously, and both less than ± 0.10%.
(2) a kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling of the present invention is constituted
Three-phase system carries out small-signal modeling, ignores the effect of the higher order pole of system, only the dominant pole in consideration system, system can
To be reduced to second-order system.When circuit works in Boost mode, the degree of fitting of simplified ssystem transfer function is
91.43%, ssystem transfer function such as formula (10), the Bode diagram of system is as shown in Figure 8.
When circuit works in Buck mode, the degree of fitting of simplified ssystem transfer function is 91.88%, the biography of system
Delivery function such as formula (11), the Bode diagram of system are as shown in Figure 9.It, can be to system reality according to Fig. 8 and system shown in Figure 9 Bode diagram
It now compensates, carries out closed-loop system design, algorithm design is relatively simple.
(3) biggish step-up ratio may be implemented in converter.Under Buck mode, different coupling inductance no-load voltage ratios is chosen, it can
To measure step-up ratio in the case where duty ratio difference, as shown in Figure 10.It can be seen from fig. 10 that in the feelings of different N values
The inverse of condition downconverter step-up ratio is larger, therefore can expeditiously large-scale decompression transformation；Simultaneously Boost mode not
It is as shown in figure 11 with step-up ratio of the coupling inductance in different duty.It can be seen from figure 11 that converter may be implemented
Large-scale boosting inverter, while greater efficiency is kept when being converted on a large scale.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of two-way DC/DC converter monomer of the present invention；
Fig. 2 is a kind of principle of the two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling of the present invention
Schematic diagram；
Fig. 3 is the power switch tube S under Buck mode1, power switch tube S2And power switch tube S3Control strategy figure；
Wherein, SG1For power switch tube S1The received control signal of grid, SG2For power switch tube S2Grid received control letter
Number, SG3For power switch tube S3The received control signal of grid, VGSFor power switch tube grid source electrode both end voltage；
Fig. 4 is the power switch tube S under Buck mode3When as power change switch, two-way DC/DC converter monomer
(1) waveform diagram；Wherein,For coupling inductance primary current,For coupling inductance secondary current,To flow through inductance L1Electricity
Stream,To flow through inductance L2Electric current,For switching tube S1Drain-source voltage,To flow through switching tube S1Electric current,
For switching tube S2Drain-source voltage,To flow through switching tube S2Electric current,For switching tube S3Drain-source voltage,
To flow through switching tube S3Electric current；
Fig. 5 is the power switch tube S under Boost mode1, with power switch tube S3It is complementary under conditions of there are dead zone
The policy map of control；
Fig. 6 is the waveform diagram of two-way DC/DC converter monomer (1) under Boost mode；
Fig. 7 is the rough schematic view of the magnetic core of crisscross parallel method；
Fig. 8 is the system Bode diagram under Boost mode；
Fig. 9 is the system Bode diagram under Buck mode；
Figure 10 is step-up ratio curve graph under Buck mode；
Figure 11 is step-up ratio curve graph under Boost mode；
Figure 12 is model machine output voltage waveform；
Figure 13 is a kind of output of the two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling of the present invention
Efficiency.
Specific embodiment
Specific embodiment 1: illustrating present embodiment referring to Fig. 1 and Fig. 2, one kind described in present embodiment is based on handing over
The two-way DC/DC converter of the high step-up ratio of wrong parallel-connection structure, it includes 3 two-way DC/DC converter monomers 1, and 3 two-way
DC/DC converter monomer 1 is connected in parallel；
Each of described two-way DC/DC converter monomer 1 includes inductance L1, inductance L2, inductance Ls, inductance LP, capacitor C1, electricity
Hold C2, diode D1To D4, power switch tube S1, power switch tube S2And power switch tube S3；
Inductance L2One end and inductance LPOne end connection, inductance L2The other end and diode D2Cathode and power open
Close pipe S2Negative terminal connect simultaneously；
Inductance LPThe other end and inductance LsOne end, diode D1Anode, power switch tube S1Anode connect simultaneously
It connects；
Inductance LsThe other end and capacitor C2One end connection, capacitor C2The other end and diode D3Cathode, power opens
Close pipe S2Anode and power switch tube S3Negative terminal connect simultaneously；
Diode D1Cathode and capacitor C1One end and inductance L1One end connect simultaneously, inductance L1The other end and two
Pole pipe D3Anode and diode D4Cathode connect simultaneously；
Power switch tube S1Negative terminal and diode D2Anode, capacitor C1The other end and diode D4Anode simultaneously
Connection；
Inductance LPWith inductance LsConstitute coupling inductance Lr, and inductance LPFor coupling inductance LrPrimary side, inductance LsFor coupling electricity
Feel LrSecondary side；
The inductance L2One end and power switch tube S1Negative terminal be respectively used to access low-side power VLIt is positive and negative
Pole；
The power switch tube S3Anode and diode D4Anode be respectively used to access high side power VHJust,
Cathode；
Coupling inductance L in 3 two-way DC/DC converter monomers 1rIt is wrapped on same iron core.
Shown in a kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling described in present embodiment
Circuit has three-phase symmetrical structure, therefore, emphatically from the main contents of single-phase circuit analysis invention in principle.
Principle analysis:
The two-way DC/DC converter monomer 1 will have five parts composition, it may be assumed that lower-voltage circuit, high pressure lateral circuit, mistake
Cross circuit, clamp circuit and step-down switching circuit.
Lower-voltage circuit includes coupling inductance LrPrimary side LPAnd power switch tube S1；Lower-voltage circuit and two-way DC/DC become
The low-pressure side of parallel operation monomer 1 is connected, corresponding power switch tube S3It is high pressure lateral circuit, high pressure lateral circuit and circuit
High-pressure side is connected.
Transition circuit includes coupling inductance LrSecondary side LsAnd capacitor C2, and transition circuit is connecting two-way DC/DC transformation
Between the high-pressure side and low-pressure side of device monomer 1, play the role of energy snubber.
Clamp circuit includes inductance L1, capacitor C1, diode D1、D3、D4, in order to it is mentioned in the switching tube course of work
For current path, the formation of promotion switching tube Sofe Switch process.
Step-down switching circuit includes inductance L2, diode D2, power switch tube S2, the secondary buck part of circuit is constituted,
Secondary buck part is only worked under the Buck mode of circuit, is provided necessary access for electric current, is guaranteed the Buck of circuit
Mode is gone on smoothly.
(1) the Buck mode of two-way DC/DC converter monomer 1
Under Buck mode, the transformation of secondary buck subparticipation power, and power switch tube S2With power switch tube S1Together
Phase controlling, with power switch tube S3Complementary control under conditions of there are dead zone.Control strategy is as shown in Figure 3.
Under Buck mode, two-way 1 circuit of DC/DC converter monomer shares seven mode.In the operation mode of circuit,
Power switch tube S3For power change switch, and switching tube S1With S2Primarily serve booster action in the process, and S2It is open-minded
When, work in synchronous rectification state.The primary waves shape of two-way DC/DC converter monomer 1 is as shown in Figure 4 under Buck mode.
It, can be with from figure 3, it can be seen that the switching tube in two-way DC/DC converter monomer 1 can be open-minded with no-voltage
Sofe Switch state is realized to greatly reduce the loss of circuit.In t0-t1Moment, S3It is open-minded, VH-S3-C2-Ls-LP-VLConstitute electricity
One access of stream, according to loop voltage law, available voltage VHExpression formula, such as formula 1:
Due to LPAnd LsIt is coupling inductance LrPrimary and secondary side, it is assumed that coupling inductance LrNo-load voltage ratio be N, then secondary voltageIt can be write asThen formula (1) can be write as:
And so on, in t3-t4Moment, forIt can be write asSimultaneously because two-way DC/DC
The dead time of converter monomer 1 is shorter, it is therefore contemplated that d1+d3=1, therefore:
Therefore, formula 2 can arrange are as follows:
It is comprehensive, by formula 1 to formula 4, boosting of the two-way DC/DC converter monomer 1 under Buck mode can be write out
ThanIt is as shown in Equation 5:
(2) the Boost mode of two-way DC/DC converter monomer 1
Under Boost mode, the secondary buck part of circuit is not involved in the transformation of power, switching tube S1, with switching tube S3?
There are controls complementary under conditions of dead zone.Control strategy is as shown in Figure 5.
Under Boost mode, since decompression auxiliary circuit is not involved in power conversion, relevant circuit mode also has
It is reduced, shares 6 different operation modes, and switching tube S3When opening, then two-way DC/DC converter monomer 1 works in together
Rectification state is walked, the loss in circuit can be further decreased.Two-way DC/DC converter monomer 1 is main under Boost mode
Waveform is as shown in Figure 6.
From fig. 6 it can be seen that the switching tube in circuit can be open-minded with no-voltage, may be implemented Sofe Switch state with
Greatly reduce the loss of circuit.In t0-t1Moment, S1It is open-minded, C at this time2-Ls-S1-C1-L1-D1An access of electric current is constituted,
At this point, inductance L1Inductive current interconversion rate very little, therefore, inductance L1On voltage can ignore, therefore it is fixed according to loop voltage
Rule, has
And so on, at the t2-t3 moment, VL-LP-D1-C1Circuit is constituted, therefore,As shown in formula (7), think simultaneously
Dead time is shorter to be can be ignored, and therefore, can represent VHVoltage, such as formula (8),
Comprehensive, above formula 6 to formula 8 can write out boosting of the two-way DC/DC converter monomer (1) under Boost mode
Than such as shown in (9)
(3) novel crisscross parallel flows mode
When carrying out two-way DC/CD Converter Interleaving Parallel, electric current distribution uneven often one is caused stabilization of equipment performance
The major reason of difference, therefore, the present invention utilize the coupling inductance L in circuitr, devise novel crisscross parallel mode.In parallel connection
In the process, by the coupling inductance L of 3 two-way DC/DC converter monomers 1rIt is wrapped on same iron core, the present invention can rationally be set
The space length of iron core coil and the canoe of coil are counted, can realize and out of phase flow.This kind of current equalizing method behaviour
Make simply, cost is relatively low, complicated for operation, higher cost existing for the sagging current-equalizing method of the external characteristics avoided, active current-equalizing method,
The low drawback of reliability.The rough schematic view of the magnetic core of novel crisscross parallel method of the invention is as shown in Figure 7.
Verification test:
In order to verify a kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling proposed by the invention
The correctness of design, the reversible transducer model machine for having built crisscross parallel are tested.The control section of model machine selects ATMEL public
The AT90PWM2 type single-chip microcontroller of department, the model single-chip microcontroller arithmetic speed is fast, while internal with PSC module, is conducive to voltage detecting
And PWM wave output.To realize strong driving capability, driving chip selects dedicated control and chip I R2104 to carry out circuit drives.
Single phase bidirectional DC/DC power inverter component parameters are as shown in table 1, fsThe frequency of expression system work.
The component parameter of the two-way DC/DC converter monomer 1 of table 1
2, experiment result
With converter input voltage 24V, coupling inductance LrThe model machine of no-load voltage ratio N=2 is tested, optional duty ratio D=
0.52, it is 200V through experiment test circuit output voltage, ripple is smaller, and output voltage waveforms are as shown in figure 12.
Simultaneously in VL=24V, VHUnder=200V voltage conditions, different loads is chosen, under the conditions of different power grades
The power of circuit is measured.Measurement result is as shown in figure 13, it can be observed from fig. 13 that circuit is in wide input range, width
Efficiency all with higher in the case where load regulation, in the case where output power is approximately equal to the loading condition of 300W, output power is most
It greatly, has been more than 95%.
Claims (3)
1. a kind of two-way DC/DC converter of high step-up ratio based on Interleaving and Transformer Paralleling, which is characterized in that it includes 3 two-way
DC/DC converter monomer (1), and 3 two-way DC/DC converter monomers (1) are connected in parallel；
Each of described two-way DC/DC converter monomer (1) includes inductance L1, inductance L2, inductance Ls, inductance LP, capacitor C1, capacitor
C2, diode D1To D4, power switch tube S1, power switch tube S2And power switch tube S3；
Inductance L2One end and inductance LPOne end connection, inductance L2The other end and diode D2Cathode and power switch tube S2
Source electrode connect simultaneously；
Inductance LPThe other end and inductance LsOne end, diode D1Anode, power switch tube S1Drain electrode connect simultaneously；
Inductance LsThe other end and capacitor C2One end connection, capacitor C2The other end and diode D3Cathode, power switch tube
S2Drain electrode and power switch tube S3Source electrode connect simultaneously；
Diode D1Cathode and capacitor C1One end and inductance L1One end connect simultaneously, inductance L1The other end and diode D3
Anode and diode D4Cathode connect simultaneously；
Power switch tube S1Source electrode and diode D2Anode, capacitor C1The other end and diode D4Anode connect simultaneously；
Inductance LPWith inductance LsConstitute coupling inductance Lr, and inductance LPFor coupling inductance LrPrimary side, inductance LsFor coupling inductance Lr's
Secondary side；
The inductance L2One end and power switch tube S1Source electrode be respectively used to access low-side power VLPositive and negative electrode；
The power switch tube S3Drain electrode and diode D4Anode be respectively used to access high side power VHPositive and negative electrode；
Coupling inductance L in 3 two-way DC/DC converter monomers (1)rIt is wrapped on same iron core.
2. the two-way DC/DC converter of a kind of high step-up ratio based on Interleaving and Transformer Paralleling according to claim 1, feature
It is, further includes capacitor CLWith capacitor CH；
Capacitor CLBoth ends be respectively connected to low-side power VLPositive and negative electrode,
Capacitor CHBoth ends be respectively connected to high side power VHPositive and negative electrode.
3. the two-way DC/DC converter of a kind of high step-up ratio based on Interleaving and Transformer Paralleling according to claim 1, feature
It is, the power switch tube S1, power switch tube S2And power switch tube S3It is NMOS transistor.
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| CN107947291A (en) * | 2017-12-21 | 2018-04-20 | 沈阳贝特瑞科技有限公司 | A kind of accumulator cell charging and discharging management system |
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