CN108900089A - Applied to voltage transmission than the DAB total power soft switching control method greater than 1 - Google Patents
Applied to voltage transmission than the DAB total power soft switching control method greater than 1 Download PDFInfo
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- CN108900089A CN108900089A CN201810694835.XA CN201810694835A CN108900089A CN 108900089 A CN108900089 A CN 108900089A CN 201810694835 A CN201810694835 A CN 201810694835A CN 108900089 A CN108900089 A CN 108900089A
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- 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
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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)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of applied to voltage transmission than the DAB total power soft switching control method greater than 1, PWM output is adjusted by digitial controller, to control corresponding switching device.Outer phase shift ratio D when theoretical calculation, between the PWM output mainly former secondary side H bridge of adjustment high frequency transformer0, phase shift ratio D in primary side full-bridge1, phase shift ratio D in secondary side full-bridge2Three phase shifting control amounts enable double active full-bridge direct current converters in voltage transmission than the Sofe Switch under realizing electric current optimization in the full power range greater than 1.The power loss that converter is reduced while having widened soft-switching range improves converter whole efficiency, and the circuit structure without changing converter, it is easy to accomplish, applicability is wide, can be applied to high-frequency isolation Switching Power Supply.
Description
Technical field
The present invention relates to a kind of DC/DC converter more particularly to it is a kind of applied to voltage transmission than the full function of DAB greater than 1
Rate soft switching control method.
Background technique
With the development and electrical equipment technology of the technologies such as new energy, DC micro power grid system and vehicle electric system
It is continuously improved, ultrahigh-power bidirectional DC converter receives more and more attention.Wherein, double active full-bridge (Dual Active
Bridge, DAB) DC converter because of it with electrical isolation, symmetrical configuration, high reliablity, power density be high, Sofe Switch is easy to
The advantages that realization, is by extensive concern.The common control method of DAB is phase shifting control, by controlling transformer primary pair side alternating voltage
Between phase, the former secondary side full-bridge phase difference that diagonally control switching tube is opened entirely control the size and Orientation of transimission power, DAB
The most frequently used and most traditional control method is single phase shift (Single phase shift, SPS) control, only high frequency transformer
One control amount of phase difference between the alternating voltage of former pair side, this method control are simple, it is easy to accomplish Sofe Switch, but inputting
The problems such as there are power reflux is larger, and soft-switching range reduces, device current stress is big when output voltage is not than being 1.For
Solving these problems researcher has done many effort, and extension phase shift is proposed on the basis of single phase shifting control
(Extended phase shift, EPS) control method, dual phase shift (Dual phase shift, DPS) control method, three
Phase shift (Triple phase shift, TPS) control method again.Wherein there are three phase shifting control amount, SPS, DPS and EPS for TPS tool
It is the simplification or special shape of TPS, three control amounts are more general, also improve the flexibility of control, can be by dividing
Analysis obtains the constraint condition between three control amounts, may be implemented to reduce reflux function through overconstrained condition three obtained control amount
Rate reduces switching device current stress and Sofe Switch, improves the efficiency of transmission of converter.Full control switching device is opening shutdown
Shi Ruo is not carried out Sofe Switch, will cause power loss, while generating a large amount of heat, causes to control switching device and periphery member entirely
Part fever, reduces efficiency of transmission, reliability and service life of converter etc., so double active full-bridge direct current converter work are in high frequency
The realization of Sofe Switch is particularly important in.
Summary of the invention
In view of the above problems, the present invention provides a kind of applied to voltage transmission than the DAB total power Sofe Switch control greater than 1
Method processed, this method give the functional relation of three phase shift values of TPS control, relationship is made of elementary function, is calculated
Simplicity, applicability is wide, and the Sofe Switch in full power range is realized on the basis of device current stress is lesser, improves converter
Efficiency of transmission, reliability.
To achieve the goals above, the technical solution that the present invention uses is as follows:
It is a kind of applied to voltage transmission than be greater than 1 DAB total power soft switching control method, the device that this method is based on
Including DC power supply, high frequency transformer primary side full-bridge H1, high frequency transformer pair side full-bridge H2, high-frequency inductor L and high frequency transformer,
DC load, primary side input capacitance C1, pair side output capacitance C2And digitial controller composition;The high frequency transformer primary side is complete
Bridge H1By S1~S4Four full control switching device compositions, high frequency transformer pair side full-bridge H2By Q1~Q4Four full control switching device groups
At the DC voltage source anode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus anode be connected
It connects, DC voltage source cathode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus cathode be connected;Institute
State high frequency transformer primary side full-bridge H1Two switching tube midpoint of front and back bridge arm respectively with the one end high-frequency inductor L and high frequency transformer primary side
Negative terminal is connected, and the high-frequency inductor L other end is connected with high frequency transformer primary side anode;The anode of the DC load and secondary side
Input capacitance C2Anode, high frequency transformer pair side full-bridge H2DC bus anode be connected, DC load cathode and secondary side input
Capacitor C2Cathode, high frequency transformer pair side full-bridge H2DC bus cathode be connected;High frequency transformer pair side full-bridge H2Before
Two switching tube midpoint of bridge arm is connected with high frequency transformer pair side both ends respectively afterwards, and high frequency transformer no-load voltage ratio is n:1;
The high frequency transformer primary side full-bridge H1Four full control switching tube S1~S4Control signal input and high frequency become
Depressor pair side full-bridge H2Four full control switching device Q1~Q4Control signal input and the digitial controller PWM believe
Number output end is connected;
The digitial controller includes phase shifting parameter calculator and the two parts of phase shift modulation device, first initialization number
Controller, set double active full-bridge converter basic parameter transformer voltage ratio n, high-frequency inductor L, output PWM wave frequency fs,
Desired output voltage value Vref, sample and obtain input voltage V1, sampling obtain output voltage V0, output electric current I0, phase shifting parameter meter
Calculating device and calculating output voltage values is VrefWhen output power P, three phase shift signals are exported after calculating by control method to described
Phase shift modulation device, the full control corresponding with the secondary side full-bridge of the original of the switch control signal output end of the phase shift modulation device switch
Pipe S1~S4And Q1~Q4It is connected;Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1
Phase shift ratio D in full-bridge1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1Phase shift ratio in full-bridge
D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
Specifically include following steps:
1) controller calculates input and output voltage transfer ratio by formula (1):
2) M > 1 is taken, the digitial controller determines that three transimission powers are segmented according to input and output voltage transfer ratio:
Low-power segmentation:
Mid power segmentation:
High-power segmentation:
Wherein, PLFor low power period transimission power, PMFor mid power section transimission power, PHFor high power section transimission power;
3) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
When transimission power is in low power period, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in mid power section, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in high-power section, corresponding three phase shifting control amounts are obtained using following formula:
Wherein, T is half switch periods of double active full-bridge direct current converters.
4) phase-shift controller described in is by the phase shift ratio D between the former secondary side H bridge of the high frequency transformer0, primary side H1Full-bridge
Interior phase shift ratio D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts form driving signal, the driving signal of eight switching tubes
The primary side H is driven by output port1Full-bridge, pair side H2Eight of full-bridge are complete to control switching device, is by the above control method
Realize it is a kind of applied to voltage transmission than greater than 1 DAB total power Sofe Switch control, realize primary side H1Full-bridge, pair side H2Full-bridge
Eight full control switching devices can Sofe Switch;Power loss is reduced, transducer effciency is improved.
The invention discloses a kind of applied to voltage transmission than the DAB total power soft switching control method greater than 1, through excessive
Analysis obtains the power expression and high-frequency inductor current expression under each mode, soft opens according to Sofe Switch constraint condition is accomplished
The phase shifting parameter range of pass, each power points has countless phase shifting parameter groups that Sofe Switch may be implemented at this time, finally by grinding
Study carefully to obtain the analytical expression between control amount, power points uniquely corresponding phase shifting parameter group can be found out, realizes Sofe Switch
While make current stress smaller, improve efficiency of transmission.
Compared with prior art, the invention has the advantages that:
1. realizing the calculating brief introduction, conveniently of Sofe Switch, it is made of elementary function, does not contain complicated calculations.
2. the present invention adapts to the case where any voltage transmission ratio when M > 1, it is suitable for the entire power bracket of converter.
3. increasing the reliability of device present invention improves device operating conditions, the efficiency of transmission of converter is improved.
Detailed description of the invention
Fig. 1 is the systematic schematic diagram of double active full-bridge direct current converter Sofe Switch based on triple phase shifts.
Fig. 2 is the driving signal timing diagram and three phase shifting control amount D when TPS is controlled0、D1、D2Between driving signal
Relationship.
Fig. 3 is control flow chart.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3 shows, the present invention it is a kind of applied to voltage transmission than be greater than 1 DAB total power Sofe Switch control
Method processed the specific implementation process is as follows:
The present invention it is a kind of applied to voltage transmission than be greater than 1 DAB total power soft switching control method, this method is based on
Device include DC power supply, high frequency transformer primary side full-bridge H1, high frequency transformer pair side full-bridge H2, high-frequency inductor L and high frequency become
Depressor, DC load, primary side input capacitance C1, pair side output capacitance C2And digitial controller composition;The high frequency transformer is former
Side full-bridge H1By S1~S4Four full control switching device compositions, high frequency transformer pair side full-bridge H2By Q1~Q4Four full control derailing switches
Part composition, the DC voltage source anode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus anode phase
Connection, DC voltage source cathode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus cathode be connected;
The high frequency transformer primary side full-bridge H1Bridge arm two switching tube midpoint in front and back is former with the one end high-frequency inductor L and high frequency transformer respectively
Side negative terminal is connected, and the high-frequency inductor L other end is connected with high frequency transformer primary side anode;The anode of the DC load and pair
Side input capacitance C2Anode, high frequency transformer pair side full-bridge H2DC bus anode be connected, DC load cathode and secondary side are defeated
Enter capacitor C2Cathode, high frequency transformer pair side full-bridge H2 DC bus cathode be connected;High frequency transformer pair side full-bridge H2
Bridge arm two switching tube midpoint in front and back is connected with high frequency transformer pair side both ends respectively, and high frequency transformer no-load voltage ratio is n:1;The height
Frequency power transformer primary side full-bridge H1Four full control switching tube S1~S4Control signal input and high frequency transformer pair side full-bridge H2
Four full control switching device Q1~Q4Control signal input be connected with the pwm signal output end of the digitial controller;
The digitial controller includes phase shifting parameter calculator and the two parts of phase shift modulation device, first initialization number
Controller, set double active full-bridge converter basic parameter transformer voltage ratio n, high-frequency inductor L, output PWM wave frequency fs,
Desired output voltage value Vref, sample and obtain input voltage V1, sampling obtain output voltage V0, output electric current I0, phase shifting parameter meter
Calculating device and calculating output voltage values is VrefWhen output power P, three phase shift signals are exported after calculating by control method to described
Phase shift modulation device, the full control corresponding with the secondary side full-bridge of the original of the switch control signal output end of the phase shift modulation device switch
Pipe S1~S4And Q1~Q4It is connected;Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1
Phase shift ratio D in full-bridge1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1Phase shift ratio in full-bridge
D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
Specifically include following steps:
1) controller calculates input and output voltage transfer ratio by formula (1):
2) M > 1 is taken, the digitial controller determines that three transimission powers are segmented according to input and output voltage transfer ratio:
Low-power segmentation:
Mid power segmentation:
High-power segmentation:
Wherein, PLFor low power period transimission power, PMFor mid power section transimission power, PHFor high power section transimission power;
3) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
When transimission power is in low power period, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in mid power section, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in high-power section, corresponding three phase shifting control amounts are obtained using following formula:
Wherein, T is half switch periods of double active full-bridge direct current converters.
4) phase-shift controller described in is by the phase shift ratio D between the former secondary side H bridge of the high frequency transformer0, primary side H1Full-bridge
Interior phase shift ratio D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts form driving signal, the driving signal of eight switching tubes
The primary side H is driven by output port1Full-bridge, pair side H2Eight of full-bridge are complete to control switching device, is by the above control method
Realize it is a kind of applied to voltage transmission than greater than 1 DAB total power Sofe Switch control, realize primary side H1Full-bridge, pair side H2Full-bridge
Eight full control switching devices can Sofe Switch;Power loss is reduced, transducer effciency is improved.
The foregoing is merely preferred embodiments of the invention, are not intended to limit the invention, all of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within spirit and principle.
Claims (1)
1. being applied to voltage transmission than the DAB total power soft switching control method greater than 1, the device that this method is based on includes straight
Galvanic electricity source, high frequency transformer primary side full-bridge H1, high frequency transformer pair side full-bridge H2, high-frequency inductor L and high frequency transformer, direct current it is negative
It carries, primary side input capacitance C1, pair side output capacitance C2And digitial controller composition;The high frequency transformer primary side full-bridge H1By
S1~S4Four full control switching device compositions, high frequency transformer pair side full-bridge H2By Q1~Q4Four full control switching device compositions, institute
State DC voltage source anode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus anode be connected, direct current
Voltage source negative pole and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus cathode be connected;The high frequency becomes
Depressor primary side full-bridge H1Bridge arm two switching tube midpoint in front and back is connected with the one end high-frequency inductor L and high frequency transformer primary side negative terminal respectively
It connects, the high-frequency inductor L other end is connected with high frequency transformer primary side anode;The anode of the DC load and secondary side input capacitance
C2Anode, high frequency transformer pair side full-bridge H2DC bus anode be connected, DC load cathode and pair side input capacitance C2It is negative
Pole, high frequency transformer pair side full-bridge H2 DC bus cathode be connected;High frequency transformer pair side full-bridge H2Front and back bridge arm
Two switching tube midpoints are connected with high frequency transformer pair side both ends respectively, and high frequency transformer no-load voltage ratio is n:1;The high frequency transformer
Primary side full-bridge H1Four full control switching tube S1~S4Control signal input and high frequency transformer pair side full-bridge H2Four it is complete
Control switching device Q1~Q4Control signal input be connected with the pwm signal output end of the digitial controller;
The digitial controller includes phase shifting parameter calculator and the two parts of phase shift modulation device, is initialized first digital control
Device, set double active full-bridge converter basic parameter transformer voltage ratio n, high-frequency inductor L, output PWM wave frequency fs, it is expected that
Output voltage values Vref, sample and obtain input voltage V1, sampling obtain output voltage V0, output electric current I0, phase shifting parameter calculator
Calculating output voltage values are VrefWhen output power P, three phase shift signals are exported after calculating by control method to the phase shift
Modulator, the switch control signal output end of the phase shift modulation device full control switching tube S corresponding with the secondary side full-bridge of the original1
~S4And Q1~Q4It is connected;Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1Full-bridge
Interior phase shift ratio D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
Triple phase shift values are the phase shift ratio D between the former secondary side H bridge of high frequency transformer0, primary side H1Phase shift ratio D in full-bridge1, it is secondary
Side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts;
It is characterized in that:This method specifically includes following steps:
1) controller calculates input and output voltage transfer ratio by formula (1):
2) M > 1 is taken, the digitial controller determines that three transimission powers are segmented according to input and output voltage transfer ratio:
Low-power segmentation:
Mid power segmentation:
High-power segmentation:
Wherein, PLFor low power period transimission power, PMFor mid power section transimission power, PHFor high power section transimission power;
3) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
When transimission power is in low power period, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in mid power section, corresponding three phase shifting control amounts are obtained using following formula:
When transimission power is in high-power section, corresponding three phase shifting control amounts are obtained using following formula:
Wherein, T is half switch periods of double active full-bridge direct current converters;
4) phase-shift controller described in is by the phase shift ratio D between the former secondary side H bridge of the high frequency transformer0, primary side H1It is moved in full-bridge
Compared to D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts form driving signal, and the driving signal of eight switching tubes passes through
Output port drives the primary side H1Full-bridge, pair side H2The full control switching device of eight of full-bridge is realized by the above control method
It is a kind of to be controlled applied to voltage transmission than the DAB total power Sofe Switch greater than 1, realize primary side H1Full-bridge, pair side H2Eight of full-bridge
Full control switching device can Sofe Switch.
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CN110557029A (en) * | 2019-10-16 | 2019-12-10 | 艾尚储能科技(苏州)有限公司 | soft switching method of double-active full-bridge direct current converter under multiple phase-shift control |
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CN112583270A (en) * | 2019-09-30 | 2021-03-30 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | Multiple phase-shifting control method and device for double-active full-bridge DC/DC converter and charger |
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