CN108988646A - Voltage transmission is than the DAB optimal control method greater than 1 under zero voltage switch - Google Patents
Voltage transmission is than the DAB optimal control method greater than 1 under zero voltage switch Download PDFInfo
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- CN108988646A CN108988646A CN201810694851.9A CN201810694851A CN108988646A CN 108988646 A CN108988646 A CN 108988646A CN 201810694851 A CN201810694851 A CN 201810694851A CN 108988646 A CN108988646 A CN 108988646A
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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
- H02M1/0048—Circuits or arrangements for reducing losses
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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 invention discloses voltage transmissions under a kind of zero voltage switch than the DAB optimal control method greater than 1, according to the phase shift ratio D between the H bridge of transformer primary pair side0And phase shift ratio D in the H full-bridge of two sides1、D2The size relation of three phase shifting control amounts adjusts voltage current waveform.DAB converter is enabled to be greater than 1 in voltage transmission ratio, i.e. vsGreater than vpWhen and in the case where low-power, to realize the zero voltage switch under electric current optimization, improve device operating conditions.
Description
Technical field
The present invention relates to voltage transmissions under a kind of DC/DC converter more particularly to a kind of zero voltage switch than being greater than 1
DAB optimal 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 bridge (Dual Active
Bridge, DAB) DC converter because of it with electric appliance isolation, symmetrical configuration, high reliablity, power density be high, zero voltage switch
The advantages that being easily achieved is by extensive concern.The common control method of DAB is phase shifting control, passes through the exchange of control transformer primary pair side
Phase, former secondary side bridge inner opposite angle between voltage control the phase difference that switching tube is opened entirely to control size and the side of transimission power
To it is single phase shift (Single phase shift, SPS) control, only high frequency that it is also most traditional control method that DAB is the most frequently used
One control amount of phase between the alternating voltage of transformer primary pair side, this method control are simple, it is easy to accomplish zero voltage switch,
But there are power reflux larger, zero voltage switch range shorters, device current stress when input and output voltage is than being not 1
The problems such as big.Researcher has done many effort in order to solve these problems, and extension is proposed on the basis of single phase shifting control
Phase shift (Extended phase shift, EPS) control method, dual phase shift (Dual phase shift, DPS) controlling party
Method, triple phase shifts (Triple phase shift, TPS) control method.Wherein there are three phase shifting control amount, SPS, DPS for TPS tool
It is the reduced form of TPS with EPS, three control amounts are more general, also improve the flexibility of control, can pass through analysis
The constraint condition between three control amounts is obtained, may be implemented to reduce reflux function through overconstrained condition three obtained control amount
Rate reduces switching device current stress and zero voltage switch, improves the efficiency of transmission of converter.
If control switching device is not carried out zero voltage switch when opening shutdown entirely, it will cause power loss, generate simultaneously
A large amount of heat causes to control switching device and peripheral element fever entirely, reduces the efficiency of transmission, reliability and service life of converter
Deng, it is particularly evident under converter low-power operation, so double active full-bridge direct current converter work low function in frequency applications
The realization of rate zero voltage switch is particularly important, and currently has many zero voltage switch controls for realizing voltage transmission than less than 1 when
Method processed, but few research voltage transmissions are than the control method in the case of being greater than 1.
Summary of the invention
The present invention provides voltage transmissions under a kind of zero voltage switch than the DAB optimal control method greater than 1, and this method is given
Going out the functional relation and rating formula of three phase shift values of triple phase shifting controls, relationship is made of elementary function,
Calculate easy, it is smaller than converter low-power segmentation zero voltage switch when being greater than 1 and reflux power to realize voltage transmission, mentions
The working environment and reliability of high switching device.
To achieve the goals above, the technical solution that the present invention uses is as follows:
Under a kind of zero voltage switch voltage transmission than be greater than 1 DAB optimal control method, the device packet that this method is based on
Include DC power supply, high frequency transformer primary side full-bridge H1, high frequency transformer pair side full-bridge H2, it is high-frequency inductor L and high frequency transformer, straight
Current load, 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 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 H2 DC 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 transformer pair side full-bridge H2's
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 sets converter basic parameter transformer voltage ratio n, high-frequency inductor L, frequency fs, desired output voltage value Vref, sampling
Obtain input voltage V1, output voltage V0, output electric current I0, it is V that phase shifting parameter calculator, which calculates output voltage values,refWhen output
Power P exports three phase shift signals to the phase shift modulation device, the switch of the phase shift modulation device after calculating by control method
Control signal output full control switching tube S corresponding with the secondary side full-bridge of the original1~S4And Q1~Q4It is connected；It is described triple
Phase shift value is 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, pair side H2It is moved in full-bridge
Compared to D2Three phase shifting control amounts；
It is characterized in that: the following steps are included:
1) digitial controller calculates input and output voltage transfer ratio M by formula (1):
M > 1 is taken, and meets transmission power range determined by formula (2),
2) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
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；For α, the value of 0 < α < 1, α closer to 0,
The reflux power of generation is bigger, i.e., under identical transimission power, dramatically increases inductive current virtual value；It is corresponding, the value of α
Closer to 1, double active full-bridge converters need bigger dead time to realize the zero voltage switch of whole devices；
3) digitial 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 voltage transmission under a kind of zero voltage switch than be greater than 1 DAB optimal control method, realize primary side H1Full-bridge, pair side H2Full-bridge
Eight full control switching devices can zero voltage switch.
Compared with prior art, the invention has the following advantages:
1. the present invention adapts to the case where any voltage transmission ratio when M > 1, it is suitable for converter low power ranges.
2. improving the reliability of converter present invention reduces device heating, the efficiency of transmission of converter is improved.
Detailed description of the invention
Fig. 1 is the circuit diagram of DAB converter.
Voltage transmission is than the main waveform diagram greater than 1 when Fig. 2 is TPS control.
Fig. 3 be the control method under α change when, inductive current with changed power curve graph.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
As shown in Figure 1 and Figure 2, the present invention plants voltage transmission than the low-power DAB zero voltage switch control method greater than 1
The specific implementation process is as follows:
The present invention disclose voltage transmission under a kind of zero voltage switch than be greater than 1 DAB optimal control method, this method institute base
In 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
Transformer, DC load, 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 switches
Device composition, the DC voltage source anode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus anode
It is connected, DC voltage source cathode and primary side input capacitance C1, high frequency transformer primary side full-bridge H1DC bus cathode be connected
It connects；The 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 transformation
Device 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
With secondary side input capacitance C2Anode, high frequency transformer pair side full-bridge H2DC bus anode be connected, DC load cathode and secondary
Side input capacitance C2Cathode, high frequency transformer pair side full-bridge H2 DC bus cathode be connected；High frequency transformer pair side
Full-bridge H2Bridge 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 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 full control switching device Q1~Q4Control signal input and the digitial controller pwm signal output end
It is connected；
The digitial controller includes phase shifting parameter calculator and the two parts of phase shift modulation device, first initialization number
Controller sets converter basic parameter transformer voltage ratio n, high ordinary telegram sense L, frequency fs, desired output voltage value Vref, sampling
Obtain input voltage V1, output voltage V0, output electric current I0, it is V that phase shifting parameter calculator, which calculates output voltage values,refWhen output
Power P exports three phase shift signals to the phase shift modulation device, the switch of the phase shift modulation device after calculating by control method
Control signal output full control switching tube S corresponding with the secondary side full-bridge of the original1~S4And Q1~Q4It is connected；It is described triple
Phase shift value is 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, pair side H2It is moved in full-bridge
Compared to D2Three phase shifting control amounts；
Specifically includes the following steps:
1) digitial controller calculates input and output voltage transfer ratio M by formula (4):
M > 1 is taken, and meets transmission power range determined by formula (5),
2) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
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.D2It is determined by transimission power.Such as Fig. 3, α's
For value closer to 0, the reflux power of generation is bigger, i.e., under identical transimission power, dramatically increases inductive current virtual value；Relatively
It answers, for the value of α closer to 1, double active full-bridge converters need bigger dead time to realize that the no-voltage of whole devices is opened
It closes；
3) digitial 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 voltage transmission under a kind of zero voltage switch than be greater than 1 DAB optimal control method, realize primary side H1Full-bridge, pair side H2Full-bridge
Eight full control switching devices can zero voltage switch.
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. voltage transmission is than the DAB optimal control method greater than 1 under zero voltage switch, it is characterised in that: what this method was based on
Device includes 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 transformation
Device, DC load, 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 devices
Composition, the DC voltage source anode and primary side input capacitance C1Anode, high frequency transformer primary side full-bridge H1DC bus just
Pole is connected, DC voltage source cathode and primary side input capacitance C1Cathode, high frequency transformer primary side full-bridge H1DC bus it is negative
Pole is connected；The high frequency transformer primary side full-bridge H1Two switching tube midpoint of front and back bridge arm respectively with one end of high-frequency inductor L and
High frequency transformer primary side negative terminal is connected, and the other end of high-frequency inductor L is connected with high frequency transformer primary side anode；The direct current
Anode and the pair side input capacitance C of load2Anode, high frequency transformer pair side full-bridge H2DC bus anode be connected, direct current is negative
Load with pole and pair side input capacitance C2Cathode, high frequency transformer pair side full-bridge H2 DC bus cathode be connected；The high frequency
Transformer secondary full-bridge H2Bridge arm two switching tube midpoint in front and back is connected with high frequency transformer pair side both ends respectively, 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 secondary full-bridge H2Four full control switching device Q1~Q4Control signal input and the digitial controller PWM
Signal output end is connected；
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, output voltage V0, output electric current I0, phase shifting parameter calculator, which calculates, to be exported
Voltage value is VrefWhen output power P, three phase shift signals are exported after calculating by control method to the phase shift modulation device,
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 H1Phase shift in full-bridge
Compare D1, pair side H2Phase shift ratio D in full-bridge2Three phase shifting control amounts；
It is characterized in that: the following steps are included:
1) digitial controller calculates input and output voltage transfer ratio M by formula (1):
M > 1 is taken, and meets transmission power range determined by formula (2),
2) double active full-bridge converter D0、D1、D2The calculating of three control amounts:
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；For α, the value of 0 < α < 1, α are generated closer to 0
Reflux power it is bigger, i.e., under identical transimission power, dramatically increase inductive current virtual value；Corresponding, the value of α is more leaned on
Nearly 1, double active full-bridge converters need bigger dead time to realize the zero voltage switch of whole devices；
3) digitial 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
Under a kind of zero voltage switch voltage transmission than be greater than 1 DAB optimal control method, realize primary side H1Full-bridge, pair side H2The eight of full-bridge
A full control switching device can zero voltage switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810694851.9A CN108988646B (en) | 2018-06-29 | 2018-06-29 | DAB (digital audio broadcasting) optimization control method with voltage transmission ratio larger than 1 under zero-voltage switch |
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| CN201810694851.9A CN108988646B (en) | 2018-06-29 | 2018-06-29 | DAB (digital audio broadcasting) optimization control method with voltage transmission ratio larger than 1 under zero-voltage switch |
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| CN108988646B CN108988646B (en) | 2021-02-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951089A (en) * | 2019-03-26 | 2019-06-28 | 哈工大（张家口）工业技术研究院 | The control method of single-phase quasi-single-stage formula AC-DC converter |
| CN110719030A (en) * | 2019-08-27 | 2020-01-21 | 河北工业大学 | Dual phase-shift modulation method for isolated bidirectional full-bridge DC-DC converter |
| CN113114043A (en) * | 2021-04-30 | 2021-07-13 | 福州大学 | Three-phase-shift zero-reflux power optimization method for double-active full-bridge bidirectional direct-current converter |
| CN115882734A (en) * | 2023-02-22 | 2023-03-31 | 浙江日风电气股份有限公司 | Control method and related assembly of DAB converter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106685232A (en) * | 2017-01-16 | 2017-05-17 | 上海交通大学 | Modulation method with high efficiency in dual-active full-bridge converter full power range |
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2018
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| CN106685232A (en) * | 2017-01-16 | 2017-05-17 | 上海交通大学 | Modulation method with high efficiency in dual-active full-bridge converter full power range |
Non-Patent Citations (1)
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| ANPING TONG ETAL: "《Power Flow and Inductor Current Analysis of PWM》", 《2016 IEEE 8TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC-ECCE ASIA)》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951089A (en) * | 2019-03-26 | 2019-06-28 | 哈工大（张家口）工业技术研究院 | The control method of single-phase quasi-single-stage formula AC-DC converter |
| CN110719030A (en) * | 2019-08-27 | 2020-01-21 | 河北工业大学 | Dual phase-shift modulation method for isolated bidirectional full-bridge DC-DC converter |
| CN110719030B (en) * | 2019-08-27 | 2022-02-08 | 河北工业大学 | Dual phase-shift modulation method for isolated bidirectional full-bridge DC-DC converter |
| CN113114043A (en) * | 2021-04-30 | 2021-07-13 | 福州大学 | Three-phase-shift zero-reflux power optimization method for double-active full-bridge bidirectional direct-current converter |
| CN115882734A (en) * | 2023-02-22 | 2023-03-31 | 浙江日风电气股份有限公司 | Control method and related assembly of DAB converter |
| CN115882734B (en) * | 2023-02-22 | 2023-06-06 | 浙江日风电气股份有限公司 | Control method of DAB converter and related components |
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