CN108365746B - A high-gain bidirectional four-phase DC-DC converter based on coupled inductor and control method - Google Patents
A high-gain bidirectional four-phase DC-DC converter based on coupled inductor and control method Download PDFInfo
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- CN108365746B CN108365746B CN201810215005.4A CN201810215005A CN108365746B CN 108365746 B CN108365746 B CN 108365746B CN 201810215005 A CN201810215005 A CN 201810215005A CN 108365746 B CN108365746 B CN 108365746B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002457 bidirectional effect Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims abstract description 79
- 230000008878 coupling Effects 0.000 claims abstract description 54
- 238000010168 coupling process Methods 0.000 claims abstract description 54
- 238000005859 coupling reaction Methods 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 230000001939 inductive effect Effects 0.000 claims description 42
- 230000005611 electricity Effects 0.000 claims description 10
- 230000005669 field effect Effects 0.000 claims description 6
- 230000007812 deficiency Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
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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
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Abstract
The invention discloses a kind of two-way four phases DC-DC converter of high-gain based on coupling inductance and control methods, and comprising one four inductance that is coupled, each phase inductance of coupling inductance is L1~L4, coupled modes are positive and negative coupled modes, i.e., just couple between coupling inductance Odd Phases, between even number phase, it bears and couples between Odd Phases and even number phase, eight power switch tube Ss1~S8, five capacitor CL、C1、C2、CH1、CH2, the present invention has higher voltage conversion ratio, and four times of the two-way four phases DC-DC converter of tradition can be improved in voltage conversion ratio；Power switch tube has lower voltage stress, wherein power switch tube S2、S4、S6Shutdown when the voltage that bears be high side voltage half, power switch S1、S3、S5、S7、S8Shutdown when the voltage that bears be high side voltage a quarter.
Description
Technical field
The present invention relates to DC-DC converter technical fields, two-way more particularly to a kind of high-gain based on coupling inductance
Four phase DC-DC converters and control method.
Background technique
In recent years, with the development in the fields such as generation of electricity by new energy, electric car and energy-storage system, two-way high-gain DC-DC
Converter has received widespread attention and studies.
In the prior art, traditional two-way four phases DC-DC converter circuit topology is as described in Figure 1, by parasitic in circuit
The influence of the influence of parameter, especially inductance and capacitor equivalent internal resistance, above-mentioned traditional two-way four phases DC-DC converter are difficult to obtain
Obtain biggish voltage conversion ratio.Therefore, when needing to obtain sufficiently large voltage conversion ratio, foregoing circuit will be unable to satisfy reality
Border demand；In addition, the voltage born when each power switch tube shutdown of above-mentioned conventional transducers is high side voltage, voltage is answered
Power is big.
For the voltage conversion ratio for improving DC-DC converter, there are mainly three types of current solutions:
The first is that buck is realized using transformer, and energy conversion links are DC-AC-AC-DC, but this
Scheme is since conversion links are more, so that energy conversion efficiency is lower.
Second is to realize buck using switched capacitor technique, but switching device needed for this scheme is excessive, so that cost
It increases and control is complicated.
The third is buck to be realized using coupling inductance technology, but the leakage inductance of coupling inductance can cause excessive voltage point
Peak and increasing loss.
In conclusion in the prior art for how under the premise of device needed for DC-DC converter is few as far as possible to obtain foot
The problem of reaching big voltage conversion ratio, still shortage effective solution scheme.
Summary of the invention
In order to solve the deficiencies in the prior art, there is provided a kind of high-gains based on coupling inductance for one of the object of the invention
Two-way four phases DC-DC converter, is able to ascend the voltage conversion ratio of DC-DC converter.
A kind of two-way four phase DC-DC converter of high-gain based on coupling inductance, comprising:
Four are coupled inductance, and each phase inductance is L1~L4, the first phase of coupling inductance L1With third phase L3Same Name of Ends,
Two-phase L2With the 4th phase L4Different name end simultaneously be connected with the anode of low pressure side unit；
The first phase of coupling inductance L1The other end respectively with power switch tube S1First end and S2Second end be connected,
The second phase of coupling inductance L2The other end respectively with power switch tube S3First end and first times of voltage capacitance C1Cathode be connected
It connects, coupling inductance third phase L3The other end respectively with power switch tube S5First end, the first high-pressure side filter capacitor CH1's
Cathode and the second high-pressure side filter capacitor CH2Anode be connected, coupling inductance third phase L4The other end respectively with power switch
Pipe S7First end and second times of voltage capacitance C2Anode be connected；
The cathode of the low pressure side unit respectively with power switch tube S1、S3、S5、S7Second end and S8First end be connected
It connects, first times of voltage capacitance C1Anode respectively with power switch tube S2First end and S4Second end be connected, second times of piezoelectricity
Hold C2Cathode respectively with power switch tube S6First end and S8Second end be connected, the first high-pressure side filter capacitor CH1's
Anode and power switch tube S4First end be connected with the anode of high pressure side unit, the second high-pressure side filter capacitor CH2Cathode
With power switch tube S6Second end be connected with the cathode of high pressure side unit；
Power switch tube S1~S8Respective third end is connected with respective driving circuit respectively.
Further, each phase inductance coupled modes of the coupling inductance are positive and negative coupled modes, i.e. coupling inductance odd number
It is just coupled between phase, between even number phase, bears and couple between Odd Phases and even number phase.
Further, the power switch tube S1~S8Respective third end is connected with respective driving circuit respectively, institute
It states respective driving circuit and is connected to control unit.
Further, when converter work is in boost mode, the low pressure side unit is the low-pressure side being in parallel
Filter capacitor CLAnd low-side power VL；When converter work is in buck mode, the low pressure side unit is in parallel
Low-pressure side filter capacitor CLAnd load RL。
Further, when converter work is in buck mode, the high pressure side unit is high side power VH；When
In boost mode, the high pressure side unit, which is negative, carries R for the converter workH。
Further, the power switch tube S1~S8It is all N-channel field effect transistor MOSFET or is all insulated gate crystalline substance
Body pipe IGBT；When power switch tube is N-channel field effect transistor MOSFET, the first end of the power switch tube is
The drain electrode of MOSFET, second end are the source electrode of MOSFET, and third end is the grid of MOSFET；
When power switch tube is insulated gate transistor IGBT, the first end of the power switch tube is the current collection of IGBT
Pole, the second end of the power switch tube are the emitter of IGBT, and the third end of the power switch tube is the grid of IGBT.
The invention also discloses a kind of control method of the two-way four phases DC-DC converter of high-gain based on coupling inductance,
The converter uses 180 ° of Interleaved control methods, i.e., the described power switch tube S1And S2、S3And S4、S5And S6、S7And S8It is mutual respectively
Conducting is mended, does not consider dead time, and S1And S5、S3And S7Same-phase, S1And S3180 ° of phase phase difference, S1、S3、S5、S7Duty ratio
It is identical and be greater than 0.5.
Further, under 180 ° of Interleaved controls, the converter work is in boost mode or buck mode, electricity
Pressure conversion ratio are as follows:V in formulaHIt is high-pressure side DC voltage, VLIt is low-pressure side DC voltage, D is power switch
Pipe S1、S3、S5、S7The duty ratio of conducting, and 0.5 < D < 1.
Further, in boost mode, in a switch periods, the converter shares four for the converter work
A operation mode:
Mode 1,3 [t0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8
Anti-paralleled diode D2、D4、D6、D8Cut-off, low-side power VLTo inductance L1、L2、L3、L4Charging, inductive current iL1、iL2、
iL3、iL4It is linear to increase；Capacitor C1、C2Without charge and discharge, capacitance voltage vC1、vC2It is constant；Capacitor CH1、CH2Jointly to high pressure lateral load
RHPower supply, capacitance voltage vCH1、vCH2It is linear to reduce；
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Inverse parallel
Diode D2、D3、D6、D7Cut-off, low-side power VLTo inductance L1、L3Charging, inductive current iL1、iL3It is linear to increase；Inductance L2
To capacitor C1Electric discharge, CH1Charging, inductive current iL2It is linear to reduce, capacitance voltage vC1It is linear to reduce, capacitance voltage vCH1It is linear to increase
Greatly；Inductance L4To capacitor C2Charging, inductive current iL4It is linear to reduce, capacitance voltage vC2It is linear to increase；Capacitor CH1、CH2It is common right
High pressure lateral load RHPower supply, capacitance voltage vCH2It is linear to reduce；
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Inverse parallel
Diode D1、D4、D5、D8Cut-off, low-side power VLTo inductance L2、L4Charging, inductive current iL2、iL4It is linear to increase；Inductance L1
To capacitor C1Charging, inductive current iL1It is linear to reduce, capacitance voltage vC1It is linear to increase；Inductance L3To capacitor CH2Charging, C2Electric discharge,
Inductive current iL3It is linear to reduce, capacitance voltage vCH2It is linear to increase, capacitance voltage vC2It is linear to reduce；Capacitor CH1、CH2Jointly to height
Press lateral load RHPower supply, capacitance voltage vCH1It is linear to reduce.
Further, the converter work is in buck mode, and in a switch periods, there are four work altogether for converter
Mode:
1,3 [t of mode0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8
Anti-paralleled diode D2、D4、D6、D8Cut-off, inductance L1、L2、L3、L4To low pressure lateral capacitance CLTo load R while chargingLFor
Electricity, inductive current iL1、iL2、iL3、iL4It is linear to reduce；Capacitor C1、C2、CH1、CH2Without charge and discharge, capacitance voltage vC1、vC2、vCH1、
vCH2It is constant；
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Inverse parallel
Diode D2、D3、D6、D7Cut-off, inductance L1、L3To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL1、
iL3It is linear to reduce；Capacitor CH1To capacitor C1With inductance L2Charging, inductive current iL2It is linear to increase, capacitance voltage vC1It is linear to increase,
Capacitance voltage vCH1It is linear to reduce；Capacitor C2To L4Charging, inductive current iL4It is linear to increase, capacitance voltage vC2It is linear to reduce；High pressure
Side power supply VHTo capacitor CH1、CH2Charging, capacitance voltage vCH2It is linear to increase；
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Inverse parallel
Diode D1、D4、D5、D8Cut-off, inductance L2、L4To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL2、
iL4It is linear to reduce；Capacitor C1To inductance L1Charging, inductive current iL1It is linear to increase, capacitance voltage vC1It is linear to reduce；Capacitor CH2It is right
Capacitor C2With inductance L3Charging, inductive current iL3It is linear to increase, capacitance voltage vC2It is linear to increase, capacitance voltage vCH2It is linear to reduce；
High side power VHTo capacitor CH1、CH2Charging, capacitance voltage vCH1It is linear to increase.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention has higher voltage conversion ratio, and voltage conversion ratio can be improved the two-way four phases DC-DC of tradition and become
Four times of parallel operation；Power switch tube has lower voltage stress, wherein power switch tube S2、S4、S6Shutdown when the electricity that bears
Pressure is the half of high side voltage, power switch S1、S3、S5、S7、S8Shutdown when the voltage that bears be high side voltage
A quarter.
2, automatic voltage regulation may be implemented in two high-pressure side filter capacitors of the invention, and respectively mutually may be implemented for coupling inductance is automatic
Flow.
High-pressure side filter capacitor CH1、CH2On voltage be VHHalf.
3, the present invention only increases by three capacitors, and circuit topology is simple, and circuit element is few, reduces the cost of converter, mentions
The high whole work efficiency of converter.
4, convertor controls of the present invention are simple, it is easy to accomplish.The 180 ° of Interleaved control modes used, can utmostly increase
Big space rate range reduces coupling inductance volume and reduces the total voltage ripple of outlet side.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the two-way four phases DC-DC converter circuit topology of tradition；
Fig. 2 is the two-way four phases DC-DC converter circuit topology of the high-gain proposed by the present invention based on coupling inductance；
Fig. 3 is that the two-way four phase DC-DC converter of the high-gain proposed by the present invention based on coupling inductance is staggeredly controlled at 180 °
The control signal of each power switch tube under mode processed；
Fig. 4 (a)-Fig. 4 (c) is that the two-way four phase DC-DC converter of the high-gain proposed by the present invention based on coupling inductance exists
Under 180 ° of Interleaved control modes, operation mode of the work in boost mode；
Fig. 5 (a)-Fig. 5 (c) is that the two-way four phase DC-DC converter of the high-gain proposed by the present invention based on coupling inductance exists
Under 180 ° of Interleaved control modes, operation mode of the work in buck mode.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, deficiency exists in the prior art, in order to solve the technical problem, the application is mentioned
A kind of two-way four phases DC-DC converter of the high-gain based on coupling inductance and control method are gone out.
In a kind of typical embodiment of the application, a kind of two-way four phase of the high-gain based on coupling inductance is provided
DC-DC converter, for the specific embodiment of the invention using topology shown in Fig. 2 Fig. 2, which includes one four inductance that is coupled,
Each phase inductance of coupling inductance is L1~L4, coupled modes are positive and negative coupled modes, i.e., between coupling inductance Odd Phases, even number phase
Between just couple, between Odd Phases and even number phase bear couple, eight power switch tube Ss1~S8, five capacitor CL、C1、C2、CH1、
CH2, circuit connecting relation are as follows:
The first phase of coupling inductance L1With third phase L3Same Name of Ends, the second phase L2With the 4th phase L4Different name end simultaneously with it is low
The anode of pressure side unit is connected, the first phase of coupling inductance L1The other end and power switch tube S1First end and S2Second
End is connected, the second phase of coupling inductance L2The other end and power switch tube S3First end and first times of voltage capacitance C1Cathode
It is connected, coupling inductance third phase L3The other end and power switch tube S5First end, the first high-pressure side filter capacitor CH1's
Cathode and the second high-pressure side filter capacitor CH2Anode be connected, coupling inductance third phase L4The other end and power switch tube S7
First end and second times of voltage capacitance C2Anode be connected；
The cathode of low pressure side unit respectively with power switch tube S1、S3、S5、S7Second end and S8First end be connected,
First times of voltage capacitance C1Anode and power switch tube S2First end and S4Second end be connected, second times of voltage capacitance C2's
Cathode and power switch tube S6First end and S8Second end be connected, the first high-pressure side filter capacitor CH1Anode and power
Switching tube S4First end and high side power VH(or load RH) anode be connected, the second high-pressure side filter capacitor CH2It is negative
Pole and power switch tube S6Second end be connected with the cathode of high pressure side unit；
Power switch tube S1~S8Respective third end is connected with respective driving circuit respectively.
Specifically, the low pressure side unit is the low-pressure side filter being in parallel when converter work is in boost mode
Wave capacitor CLAnd low-side power VL, the high pressure side unit, which is negative, carries RH；When the converter work in buck mode, institute
Stating low pressure side unit is the low-pressure side filter capacitor C being in parallelLAnd load RL, the high pressure side unit is high side power VH。
Power switch tube S1~S8It is all N-channel field effect transistor MOSFET or is all insulated gate transistor IGBT；
When power switch tube is N-channel field effect transistor MOSFET, the first end of the power switch tube is
The drain electrode of MOSFET, second end are the source electrode of MOSFET, and third end is the grid of MOSFET；
When power switch tube is insulated gate transistor IGBT, the first end of the power switch tube is the current collection of IGBT
Pole, the second end of the power switch tube are the emitter of IGBT, and the third end of the power switch tube is the grid of IGBT.
The two-way four phases DC-DC converter of the high-gain based on coupling inductance of the application becomes in the realization of control mode
Parallel operation uses 180 ° of Interleaved control modes, as shown in figure 3, the i.e. described power switch tube S1And S2、S3And S4、S5And S6、S7And S8Point
Not complementary conducting, does not consider dead time, and S1And S5、S3And S7Same-phase, S1And S3180 ° of phase phase difference, S1、S3、S5、S7It accounts for
Sky than it is identical and be greater than 0.5.
This preferred implementation example is by changing connection of the low pressure side and high pressure side to power supply or load, to verify converter
Two-way operation characteristic.That is converter work connects power supply, high-pressure side connection load in boost boost mode, using low-pressure side
Mode；Work is connected using low-pressure side and is loaded in buck decompression mode, and high-pressure side connects the mode of power supply.
Under 180 ° of Interleaved control modes, converter works in boost mode, voltage conversion ratio are as follows:V in formulaHIt is high-pressure side DC voltage, VLIt is low-pressure side DC voltage, D is power switch tube S1、S3、S5、
S7The duty ratio of conducting, and 0.5 < D < 1, (t in a switch periods0To t4For a switch periods, it is divided into four periods, point
It Wei not t0-t1、t1-t2、t2-t3、t3-t4), there are four operation modes altogether for the converter as shown in Fig. 4 (a)-Fig. 4 (c):
Mode 1,3 [t0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8
Anti-paralleled diode D2、D4、D6、D8Cut-off, low-side power VLTo inductance L1、L2、L3、L4Charging, inductive current iL1、iL2、
iL3、iL4It is linear to increase；Capacitor C1、C2Without charge and discharge, capacitance voltage vC1、vC2It is constant；Capacitor CH1、CH2Jointly to high pressure lateral load
RHPower supply, capacitance voltage vCH1、vCH2It is linear to reduce.
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Inverse parallel
Diode D2、D3、D6、D7Cut-off, low-side power VLTo inductance L1、L3Charging, inductive current iL1、iL3It is linear to increase；Inductance L2
To capacitor C1Electric discharge, CH1Charging, inductive current iL2It is linear to reduce, capacitance voltage vC1It is linear to reduce, capacitance voltage vCH1It is linear to increase
Greatly；Inductance L4To capacitor C2Charging, inductive current iL4It is linear to reduce, capacitance voltage vC2It is linear to increase；Capacitor CH1、CH2It is common right
High pressure lateral load RHPower supply, capacitance voltage vCH2It is linear to reduce.
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Inverse parallel
Diode D1、D4、D5、D8Cut-off, low-side power VLTo inductance L2、L4Charging, inductive current iL2、iL4It is linear to increase；Inductance L1
To capacitor C1Charging, inductive current iL1It is linear to reduce, capacitance voltage vC1It is linear to increase；Inductance L3To capacitor CH2Charging, C2Electric discharge,
Inductive current iL3It is linear to reduce, capacitance voltage vCH2It is linear to increase, capacitance voltage vC2It is linear to reduce；Capacitor CH1、CH2Jointly to height
Press lateral load RHPower supply, capacitance voltage vCH1It is linear to reduce.
Under 180 ° of Interleaved control modes, converter works in buck mode, voltage conversion ratio are as follows:V in formulaHWhen high-pressure side DC voltage, VLIt is low-pressure side DC voltage, D is power switch tube S1、S3、S5、
S7The duty ratio of conducting, and 0.5 < D < 1, (t in a switch periods0To t4For a switch periods, it is divided into four periods, point
It Wei not t0-t1、t1-t2、t2-t3、t3-t4), there are four operation modes altogether for the converter as shown in Fig. 5 (a)-Fig. 5 (c):
1,3 [t of mode0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8
Anti-paralleled diode D2、D4、D6、D8Cut-off, inductance L1、L2、L3、L4To low pressure lateral capacitance CLTo load R while chargingLFor
Electricity, inductive current iL1、iL2、iL3、iL4It is linear to reduce；Capacitor C1、C2、CH1、CH2Without charge and discharge, capacitance voltage vC1、vC2、vCH1、
vCH2It is constant.
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Inverse parallel
Diode D2、D3、D6、D7Cut-off, inductance L1、L3To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL1、
iL3It is linear to reduce；Capacitor CH1To capacitor C1With inductance L2Charging, inductive current iL2It is linear to increase, capacitance voltage vC1It is linear to increase,
Capacitance voltage vCH1It is linear to reduce；Capacitor C2To L4Charging, inductive current iL4It is linear to increase, capacitance voltage vC2It is linear to reduce；High pressure
Side power supply VHTo capacitor CH1、CH2Charging, capacitance voltage vCH2It is linear to increase.
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Inverse parallel
Diode D1、D4、D5、D8Cut-off, inductance L2、L4To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL2、
iL4It is linear to reduce；Capacitor C1To inductance L1Charging, inductive current iL1It is linear to increase, capacitance voltage vC1It is linear to reduce；Capacitor CH2It is right
Capacitor C2With inductance L3Charging, inductive current iL3It is linear to increase, capacitance voltage vC2It is linear to increase, capacitance voltage vCH2It is linear to reduce；
High side power VHTo capacitor CH1、CH2Charging, capacitance voltage vCH1It is linear to increase.
In addition, the two-way four phase DC-DC converter of the high-gain described herein based on coupling inductance, high-pressure side filtered electrical
Automatic voltage regulation may be implemented in appearance, and automatic current equalizing respectively mutually may be implemented in coupling inductance.It is further analyzed as follows: when circuit work exists
Stable state, power switch tube S1、S3、S5、S7Duty ratio is identical and when being equal to D, in a switch periods, inductance L1、L2、L3、L4Charge and discharge
Electric voltage-second balance, has respectively:
VLDT=(VC1-VL)(1-D)T
VLDT=(VCH1-VC1-VL)(1-D)T
VLDT=(VCH2-VC2-VL)(1-D)T
VLDT=(VC2-VL)(1-D)T
It can obtain:
Therefore, high pressure lateral capacitance being capable of automatic voltage regulation.
In one switch periods, capacitor C1、C2、CH1、CH2Charge and discharge ampere-second balances, and has respectively:
IL1(1-D) T=IL2(1-D)T
IL3(1-D) T=IL4(1-D)T
(IL2-IH) (1-D) T=IHDT
(IL3-IH) (1-D) T=IHDT
It can obtain:
IL1=IL2=IL3=IL4
Therefore, inductive current being capable of automatic current equalizing.
The main circuit of the two-way four phases DC-DC converter of high-gain of the application based on coupling inductance, mainly by four phases
Coupling inductance, eight power switch tubes and five capacitor compositions.Compared to common two-way four phases DC-DC converter, mentioned circuit
Topology only increases by three capacitors, and circuit element is few, and structure is simple, reduces the cost of converter, improves the entirety of converter
Efficiency, and convertor controls are simple, it is easy to accomplish.Converter successively differs staggeredly controlling for 180 ° of phases using each phase switching time
Method processed, to realize the HF switch control to power switch tube in improved four phase DC-DC converter of gain.Compared to common
Interleaved control proposes 180 ° of Interleaved control modes of topology use, can utmostly increase duty cycle range, reduce outlet side
Total voltage ripple.Compared with common two-way four phases DC-DC converter, the present invention has higher voltage conversion ratio, lower
Switching device voltage stress, and two high-pressure side filter capacitors may be implemented automatically equalizing voltage, four are coupled each of inductance mutually can be with
Realize automatic current equalizing.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (9)
1. a kind of two-way four phase DC-DC converter of high-gain based on coupling inductance, characterized in that include:
Four are coupled inductance, and each phase inductance is L1~L4, the first phase of coupling inductance L1With third phase L3Same Name of Ends, the second phase L2
With the 4th phase L4Different name end simultaneously be connected with the anode of low pressure side unit；
The first phase of coupling inductance L1The other end respectively with power switch tube S1First end and power switch tube S2Second end phase
Connection, the second phase of coupling inductance L2The other end respectively with power switch tube S3First end and first times of voltage capacitance C1Cathode
It is connected, coupling inductance third phase L3The other end respectively with power switch tube S5First end, the first high-pressure side filter capacitor
CH1Cathode and the second high-pressure side filter capacitor CH2Anode be connected, coupling inductance third phase L4The other end respectively with power
Switching tube S7First end and second times of voltage capacitance C2Anode be connected；
The cathode of the low pressure side unit respectively with power switch tube S1、S3、S5、S7Second end and power switch tube S8First
End is connected, first times of voltage capacitance C1Anode respectively with power switch tube S2First end and power switch tube S4Second end
It is connected, second times of voltage capacitance C2Cathode respectively with power switch tube S6First end and power switch tube S8Second end phase
Connection, the first high-pressure side filter capacitor CH1Anode and power switch tube S4First end be connected with the anode of high pressure side unit
It connects, the second high-pressure side filter capacitor CH2Cathode and power switch tube S6Second end be connected with the cathode of high pressure side unit；
Power switch tube S1~S8Respective third end is connected with respective driving circuit respectively；
The power switch tube S1~S8It is all N-channel field effect transistor MOSFET or is all insulated gate transistor IGBT；Work as function
When rate switching tube is N-channel field effect transistor MOSFET, the first end of the power switch tube is the drain electrode of MOSFET, second
End is the source electrode of MOSFET, and third end is the grid of MOSFET；
When power switch tube is insulated gate transistor IGBT, the first end of the power switch tube is the collector of IGBT, institute
The second end for stating power switch tube is the emitter of IGBT, and the third end of the power switch tube is the grid of IGBT.
2. a kind of two-way four phase DC-DC converter of high-gain based on coupling inductance as described in claim 1, characterized in that
Each phase inductance coupled modes of the coupling inductance are positive and negative coupled modes, i.e., between coupling inductance Odd Phases, between even number phase
Positive coupling, bears between Odd Phases and even number phase and couples.
3. a kind of two-way four phase DC-DC converter of high-gain based on coupling inductance as described in claim 1, characterized in that
The power switch tube S1~S8Respective third end is connected with respective driving circuit respectively, the respective driving circuit
It is connected to control unit.
4. a kind of two-way four phase DC-DC converter of high-gain based on coupling inductance as described in claim 1, characterized in that
When converter work is in boost mode, the low pressure side unit is the low-pressure side filter capacitor C being in parallelLAnd low pressure
Side power supply VL；When converter work is in buck mode, the low pressure side unit is the low-pressure side filter capacitor C being in parallelL
And load RL。
5. a kind of two-way four phase DC-DC converter of high-gain based on coupling inductance as described in claim 1, characterized in that
When converter work is in buck mode, the high pressure side unit is high side power VH；When converter work exists
When boost mode, the high pressure side unit, which is negative, carries RH。
6. a kind of two-way four phases DC-DC converter of high-gain based on the described in any item coupling inductances of claim 1-5
Control method, characterized in that the converter uses 180 ° of Interleaved control methods, i.e., the described power switch tube S1And S2、S3With
S4、S5And S6、S7And S8Complementary conducting respectively, does not consider dead time, and S1And S5、S3And S7Same-phase, S1And S3Phase phase difference
180 °, S1、S3、S5、S7Duty ratio is identical and is greater than 0.5.
7. a kind of control method of the two-way four phase DC-DC converter of high-gain based on coupling inductance as claimed in claim 6,
It is characterized in that the converter work is in boost mode or buck mode, voltage conversion ratio under 180 ° of Interleaved controls
Are as follows:V in formulaHIt is high-pressure side DC voltage, VLIt is low-pressure side DC voltage, D is power switch tube S1、S3、
S5、S7The duty ratio of conducting, and 0.5 < D < 1.
8. a kind of control method of the two-way four phase DC-DC converter of high-gain based on coupling inductance as claimed in claim 7,
It is characterized in that the converter work, in boost mode, in a switch periods, there are four Working moulds altogether for the converter
State:
Mode 1,3 [t0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8It is anti-
Parallel diode D2、D4、D6、D8Cut-off, low-side power VLTo inductance L1、L2、L3、L4Charging, inductive current iL1、iL2、iL3、iL4
It is linear to increase；Capacitor C1、C2Without charge and discharge, capacitance voltage vC1、vC2It is constant；Capacitor CH1、CH2Jointly to high pressure lateral load RHPower supply,
Capacitance voltage vCH1、vCH2It is linear to reduce；
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Two pole of inverse parallel
Pipe D2、D3、D6、D7Cut-off, low-side power VLTo inductance L1、L3Charging, inductive current iL1、iL3It is linear to increase；Inductance L2To electricity
Hold C1Electric discharge, CH1Charging, inductive current iL2It is linear to reduce, capacitance voltage vC1It is linear to reduce, capacitance voltage vCH1It is linear to increase；Electricity
Feel L4To capacitor C2Charging, inductive current iL4It is linear to reduce, capacitance voltage vC2It is linear to increase；Capacitor CH1、CH2Jointly to high-pressure side
Load RHPower supply, capacitance voltage vCH2It is linear to reduce；
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Two pole of inverse parallel
Pipe D1、D4、D5、D8Cut-off, low-side power VLTo inductance L2、L4Charging, inductive current iL2、iL4It is linear to increase；Inductance L1To electricity
Hold C1Charging, inductive current iL1It is linear to reduce, capacitance voltage vC1It is linear to increase；Inductance L3To capacitor CH2Charging, C2Electric discharge, inductance
Electric current iL3It is linear to reduce, capacitance voltage vCH2It is linear to increase, capacitance voltage vC2It is linear to reduce；Capacitor CH1、CH2Jointly to high-pressure side
Load RHPower supply, capacitance voltage vCH1It is linear to reduce.
9. a kind of control method of the two-way four phase DC-DC converter of high-gain based on coupling inductance as claimed in claim 7,
It is characterized in that the converter work, in buck mode, in a switch periods, there are four operation modes altogether for converter:
1,3 [t of mode0-t1, t2-t3]: power switch tube S1、S3、S5、S7Conducting, S2、S4、S6、S8Shutdown, S2、S4、S6、S8It is anti-
Parallel diode D2、D4、D6、D8Cut-off, inductance L1、L2、L3、L4To low pressure lateral capacitance CLTo load R while chargingLPower supply, electricity
Inducing current iL1、iL2、iL3、iL4It is linear to reduce；Capacitor C1、C2、CH1、CH2Without charge and discharge, capacitance voltage vC1、vC2、vCH1、vCH2No
Become；
2 [t of mode1-t2]: power switch tube S1、S4、S5、S8Conducting, S2、S3、S6、S7Shutdown, S2、S3、S6、S7Two pole of inverse parallel
Pipe D2、D3、D6、D7Cut-off, inductance L1、L3To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL1、iL3Line
Property reduce；Capacitor CH1To capacitor C1With inductance L2Charging, inductive current iL2It is linear to increase, capacitance voltage vC1It is linear to increase, capacitor
Voltage vCH1It is linear to reduce；Capacitor C2To L4Charging, inductive current iL4It is linear to increase, capacitance voltage vC2It is linear to reduce；High-pressure side electricity
Source VHTo capacitor CH1、CH2Charging, capacitance voltage vCH2It is linear to increase；
4 [t of mode3-t4]: power switch tube S2、S3、S6、S7Conducting, S1、S4、S5、S8Shutdown, S1、S4、S5、S8Two pole of inverse parallel
Pipe D1、D4、D5、D8Cut-off, inductance L2、L4To low pressure lateral capacitance CLTo load R while chargingLPower supply, inductive current iL2、iL4Line
Property reduce；Capacitor C1To inductance L1Charging, inductive current iL1It is linear to increase, capacitance voltage vC1It is linear to reduce；Capacitor CH2To capacitor
C2With inductance L3Charging, inductive current iL3It is linear to increase, capacitance voltage vC2It is linear to increase, capacitance voltage vCH2It is linear to reduce；High pressure
Side power supply VHTo capacitor CH1、CH2Charging, capacitance voltage vCH1It is linear to increase.
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| US10811971B2 (en) * | 2019-01-23 | 2020-10-20 | Analog Devices International Unlimited Company | Multiple-phase switched-capacitor-inductor boost converter techniques |
| CN110729899B (en) * | 2019-11-01 | 2020-08-04 | 山东大学 | Wide-input wide-output three-phase high-gain direct current converter and control method |
| CN111082662B (en) * | 2019-12-11 | 2022-11-08 | 西安工业大学 | A high-gain bidirectional soft-switching DC/DC converter based on fully coupled inductors |
| CN111464030B (en) * | 2020-05-14 | 2021-03-02 | 山东大学 | Multiphase high-gain bidirectional direct current converter, control method and system |
| CN111884508B (en) * | 2020-07-15 | 2021-09-14 | 山东大学 | Low-voltage ripple multiphase high-gain bidirectional DC-DC converter and control method thereof |
| CN111969851B (en) * | 2020-09-11 | 2021-12-28 | 中国第一汽车股份有限公司 | Four-phase bidirectional DCDC converter |
| CN112821877B (en) * | 2020-12-30 | 2022-06-21 | 哈尔滨工业大学 | Multiplexing EMI filter |
| CN112993970B (en) * | 2021-03-12 | 2022-09-09 | 清华大学 | A bipolar bidirectional buck-boost DC-DC converter with the function of suppressing DC voltage unbalance |
| CN112993971B (en) * | 2021-03-12 | 2022-07-01 | 清华大学 | A bipolar bidirectional DC-DC converter with the function of suppressing DC voltage unbalance |
| CN113162409A (en) * | 2021-04-16 | 2021-07-23 | 电子科技大学 | High-gain dual-output boost converter with inherent voltage-sharing and current-sharing characteristics |
| CN114785116A (en) * | 2022-05-05 | 2022-07-22 | 南昌航空大学 | A four-phase high-gain self-sharing DC-DC converter and its control method |
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