CN113162429B - Performance improvement control method of DAB-LLC Sigma converter - Google Patents

Performance improvement control method of DAB-LLC Sigma converter Download PDF

Info

Publication number
CN113162429B
CN113162429B CN202110467472.8A CN202110467472A CN113162429B CN 113162429 B CN113162429 B CN 113162429B CN 202110467472 A CN202110467472 A CN 202110467472A CN 113162429 B CN113162429 B CN 113162429B
Authority
CN
China
Prior art keywords
llc
converter
dab
control
load current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110467472.8A
Other languages
Chinese (zh)
Other versions
CN113162429A (en
Inventor
陈阿莲
陈智维
王威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University
Original Assignee
Shandong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong University filed Critical Shandong University
Priority to CN202110467472.8A priority Critical patent/CN113162429B/en
Publication of CN113162429A publication Critical patent/CN113162429A/en
Application granted granted Critical
Publication of CN113162429B publication Critical patent/CN113162429B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The disclosure provides a performance improvement control method of a DAB-LLC Sigma converter, which is used for acquiring the load current and the output voltage of the DAB-LLC Sigma converter; when the absolute value of the load current change amount is less than or equal to a preset threshold, executing steady-state control: regulating a phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform stable control on the output voltage; when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: obtaining PWM pulse delay time or shortening time by using optimal track control according to the absolute value of load current variation and transformer excitation inductance of the LLC converter, changing PWM pulse of one period, combining the obtained output voltage, adjusting a phase shift angle of the DAB converter by using a voltage loop PI controller, and performing output voltage steady-state recovery control; the transient response characteristic of the converter is improved, the current stress is reduced, and the system stability is improved.

Description

Performance improvement control method of DAB-LLC Sigma converter
Technical Field
The disclosure relates to the technical field of control of hybrid DC/DC converters, in particular to a performance improvement control method of a DAB-LLC Sigma converter.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the rapid development of distributed energy, new energy vehicles and various direct current loads, the DC/DC converter is more and more concerned as the core equipment of a direct current power distribution network and a micro-grid. Dual Active Bridge (DAB) and LLC resonant converters are the most widely used DC/DC converters in medium and high power fields today. However, both topologies have their own advantages and disadvantages. LLC can realize high-efficiency conversion, but needs to work under open-loop and resonant frequency; DAB current has large stress and lower efficiency, but has high controllability and can flexibly control output voltage and power.
The DAB-LLC Sigma converter is formed by combining DAB converters and LLC converters in an Input-series-output-parallel (ISOP) mode, the advantages of two topologies are fully utilized, and the traditional control method comprises the following steps: the LLC converter operates at open-loop, resonant frequency, transferring most of the power with high efficiency; the DAB converter works in a Single Phase Shift (SPS) mode, residual small part of power is transmitted, and the output voltage control of the Sigma converter is realized by adjusting a DAB Phase Shift angle through a PI controller. The control method is simple and reliable, and can ensure the advantages of high efficiency and high controllability of the converter.
The inventor finds that the method has poor performance in load transient state, the DAB transient current stress is overlarge due to the fact that the output voltage can only be adjusted by adjusting the DAB converter transmitting low power in load switching, the output voltage of the Sigma converter is over-adjusted, the adjusting time is long, and a PI controller with higher bandwidth is required, so that the system stability is seriously influenced.
Disclosure of Invention
In order to solve the defects of the prior art, the disclosure provides a performance improvement control method of a DAB-LLC Sigma converter, which improves the transient response characteristic of the converter, reduces the current stress and improves the system stability.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
the disclosure provides a performance improvement control method for a DAB-LLC Sigma converter.
A performance improvement control method of a DAB-LLC Sigma converter comprises the following processes:
acquiring load current and output voltage of a DAB-LLC Sigma converter;
when the absolute value of the load current variation is less than or equal to a preset threshold, executing steady-state control: regulating a phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform stable control on the output voltage;
when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: aiming at the LLC converter, the optimal trajectory control is utilized, the PWM driving pulse delay time or the shortening time is obtained according to the absolute value of the load current variation and the transformer excitation inductance of the LLC converter, the PWM pulse of one period is changed, and the state of the LLC converter is adjusted; and regulating the phase shift angle of the DAB converter by adopting a voltage loop PI controller in combination with the acquired output voltage, and performing stable state recovery control on the output voltage.
And further, selecting the transformer transformation ratio of the DAB converter and the LLC converter according to the rated power of the DAB-LLC Sigma converter and the expected power ratio of the DAB converter and the LLC converter.
Furthermore, the output voltage sampling frequency of the DAB-LLC Sigma converter is greater than or equal to the operating frequency of the DAB converter, and the load current sampling frequency is greater than or equal to the operating frequency of the LLC converter.
Further, when the steady state control is executed, the load current control quantity is obtained according to the transformer transformation ratio of the DAB converter, the phase shift angle of the DAB converter, the input voltage of the DAB-LLC Sigma converter, the transformer side inductance and the switching frequency of the DAB converter.
Further, the ratio of the LLC steady-state output current value to the total load current is the ratio of the power of the LLC converter to the sum of the power of the LLC converter and the power of the DAB converter.
Furthermore, the PWM pulse delay time is the ratio of the absolute value of the transformer excitation inductance and the load current variation of the LLC converter and the product of twice the transformer transformation ratio of the LLC converter and the input voltage.
Further, the PWM pulse is shortened in time to
Figure GDA0003086685210000031
Wherein T isrIs the resonant period of the LLC converter, ILLFor light load current, IHLFor heavy load currents.
A second aspect of the present disclosure provides a performance boost control system for a DAB-LLC Sigma converter.
A performance boost control system for a DAB-LLC Sigma converter, comprising:
a data acquisition module configured to: acquiring load current and output voltage of a DAB-LLC Sigma converter;
a steady state control module configured to: when the absolute value of the load current change amount is less than or equal to a preset threshold, executing steady-state control: regulating a phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform stable control on the output voltage;
a transient control module configured to: when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: aiming at the LLC converter, the optimal trajectory control is utilized, the PWM driving pulse delay time or the shortening time is obtained according to the absolute value of the load current variation and the transformer excitation inductance of the LLC converter, the PWM pulse of one period is changed, and the state of the LLC converter is adjusted; and regulating the phase shift angle of the DAB converter by adopting a voltage loop PI controller in combination with the acquired output voltage, and performing stable state recovery control on the output voltage.
A third aspect of the present disclosure provides a computer readable storage medium having stored thereon a program which, when executed by a processor, performs the steps in the method of performance boost control of a DAB-LLC Sigma converter according to the first aspect of the present disclosure.
A fourth aspect of the present disclosure provides an electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the steps in the method for performance improvement control of a DAB-LLC Sigma converter according to the first aspect of the present disclosure when executing the program.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the method, the system, the medium or the electronic equipment, the load current is detected and the current variation threshold is set to distinguish the steady state process from the transient state process, the DAB phase shift angle is adjusted only through the voltage loop PI controller in the steady state to eliminate the static error, soft switching can be achieved by both the DAB and the LLC at the moment, and the system efficiency is high.
2. According to the method, the system, the medium or the electronic equipment, OTC control over LLC is introduced during transient state, and the state of an LLC resonant cavity is rapidly adjusted to a new state in a period, so that an LLC converter becomes a more ideal direct current transformer, the current stress during DAB transient error compensation is greatly reduced, the response speed of the whole system is improved, the overshoot of output voltage is reduced, meanwhile, the bandwidth of a PI controller can be reduced, and the system stability is facilitated.
3. The method, the system, the medium or the electronic equipment disclosed by the disclosure improve the transient response characteristic when the load is suddenly changed while not influencing the steady-state efficiency of the DAB-LLC Sigma converter, and have the advantages of simple implementation and very high practical value.
4. The method, system, medium, or electronic device of the present disclosure selects the transformation ratio of the transformers of DAB and LLC according to the rated power of the DAB-LLC Sigma converter and the desired DAB, LLC power ratio, so that the system operates in the soft-switching region most of the time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a DAB-LLC Sigma converter topology diagram provided by embodiment 1 of the disclosure.
Fig. 2 is a control flow chart provided in embodiment 1 of the present disclosure.
Fig. 3 is a specific control block diagram provided in embodiment 1 of the present disclosure.
Fig. 4 is a schematic diagram of a PWM driving signal, a resonant capacitor voltage, and a resonant inductor current of an LLC in the load sudden increase provided in embodiment 1 of the present disclosure.
Fig. 5 is a waveform diagram of a PWM driving signal, a resonant capacitor voltage, and a resonant inductor current of an LLC during a load dump provided in embodiment 1 of the present disclosure.
Fig. 6 is a waveform diagram of the output voltage of the Sigma converter, the DAB inductor current, and the LLC resonant current when the load provided by embodiment 1 of the present disclosure suddenly increases.
Fig. 7 is a waveform diagram of an output voltage of a Sigma converter, a DAB inductor current, and an LLC resonant current when a load suddenly decreases, according to embodiment 1 of the present disclosure.
Detailed Description
The present disclosure is further illustrated by the following examples in conjunction with the accompanying drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example 1:
as shown in fig. 1, an embodiment 1 of the present disclosure provides a method for controlling performance improvement of a DAB-LLC Sigma converter, which specifically includes the following steps:
s1: and selecting the transformation ratio of the transformers of the DAB and the LLC according to the rated power of the DAB-LLC Sigma converter and the expected power ratio of the DAB and the LLC so as to expect that the system works in a soft switching region most of the time. Since DAB and LLC are connected in series at the input, the power ratio (P) isDAB/PLLC) Equal to the ratio of its input voltages (V)cin1/Vcin2) And the output voltages of the two are the same, so the transformer transformation ratio relation is as follows:
Figure GDA0003086685210000061
however, as the LLC transformer mainly works at the resonant frequency, it does not need to adapt to a wider input/output voltage range, so its exciting inductance can be increased appropriately, reducing the exciting current, and further improving the efficiency.
S2: determining the operating frequency f of a DAB, LLC converterDAB、fLLCAnd voltage and current sampling frequency. Specifically, because the LLC operates in a resonant state, higher frequencies may be employed to improve response speed, smaller resonant element volumes, and the like; although the DAB off-current is large, it can also be used at higher frequencies due to the smaller DAB transfer power. Then determining sampling frequency, wherein the sampling frequency of the output voltage is more than or equal to fDABTo meet the control bandwidth requirement of the voltage loop PI controllerThe sampling frequency of the carrier current is more than or equal to fLLCSo that OTC control for the LLC at transient can be achieved.
S3: as shown in the flowchart of fig. 2, the control strategy is divided into two parts according to the magnitude of the absolute value of the load current variation. The control block diagram is shown in fig. 3, when the load is constant or has small change, the DAB phase shift angle d is adjusted only by the voltage loop PI controller, and at this time, the system model is similar to the DAB model, and the load current can be directly controlled according to the formula (2). When the load current changes greatly, namely when the load suddenly changes, OTC control over the LLC is introduced.
Figure GDA0003086685210000071
S4: for OTC control of the LLC converter portion, specifically, determining the next steady state output current value of the LLC according to the new load current value, the LLC steady state output current value IoLLCAnd the total load current IloadThe relationship of (a) to (b) is as follows:
Figure GDA0003086685210000072
s5: the load sudden change is divided into two conditions of load sudden increase and load sudden decrease when the load current is changed from light load ILLSudden increase to heavy load IHLWhen the LLC drives the PWM signal to be switched on or off in a delayed mode, the delay time is related to the load current and the excitation inductance of the transformer, and the formula (4) shows. During the delay period, the LLC charges the resonant capacitor through the exciting current, so that it quickly reaches the steady state value required during heavy loading, and the waveforms of the driving and resonant cavity voltage and current are shown in fig. 4.
Figure GDA0003086685210000073
Figure GDA0003086685210000074
S6: when the load current is overloaded IHLSudden decrease to light load ILLWhen the LLC drives the PWM signal to be switched on or switched off in advance, the advance time is related to the load current and the resonant period, as shown in a formula (5), due to the advance action of the PWM signal, the resonant capacitor is insufficiently charged, the steady state value required by light load can be quickly reached, and the waveforms of the driving voltage, the resonant cavity voltage and the current are shown in a figure 5.
S7: as can be seen from the waveforms in fig. 4 and 5, when a sudden change of load current is detected, the resonant cavity is adjusted to a required state in one cycle by the OTC control for the LLC, that is, the transmission power of the LLC quickly reaches a value after the sudden change, and at this time, the DAB converter does not need to compensate for power changes caused by hysteresis and oscillation of the LLC, so as to greatly reduce the current stress in the DAB transient state, fig. 6 and 7 show the waveform changes of the output voltage, the DAB inductive current and the resonant cavity current in the load sudden increase and sudden decrease transient state in this embodiment, respectively, and it can be seen that the transient response of the output voltage is better, and the overshoot is less than 0.5%.
Example 2:
the embodiment 2 of the present disclosure provides a performance improvement control system for a DAB-LLC Sigma converter, including:
a data acquisition module configured to: acquiring load current and output voltage of a DAB-LLC Sigma converter;
a steady state control module configured to: when the absolute value of the load current change amount is less than or equal to a preset threshold, executing steady-state control: regulating a phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform stable control on the output voltage;
a transient control module configured to: when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: aiming at the LLC converter, the optimal trajectory control is utilized, the PWM driving pulse delay time or the shortening time is obtained according to the absolute value of the load current variation and the transformer excitation inductance of the LLC converter, the PWM pulse of one period is changed, and the state of the LLC converter is adjusted; and regulating the phase shift angle of the DAB converter by adopting a voltage loop PI controller in combination with the acquired output voltage, and performing stable state recovery control on the output voltage.
The working method of the system is the same as the performance improvement control method of the DAB-LLC Sigma converter provided in the embodiment 1, and the description is omitted here.
Example 3:
the embodiment 3 of the present disclosure provides a computer-readable storage medium on which a program is stored, which when executed by a processor, implements the steps in the performance improvement control method of the DAB-LLC Sigma converter as described in embodiment 1 of the present disclosure.
Example 4:
the embodiment 4 of the present disclosure provides an electronic device, which includes a memory, a processor, and a program stored in the memory and executable on the processor, and the processor executes the program to implement the steps in the performance improvement control method of the DAB-LLC Sigma converter according to the embodiment 1 of the present disclosure.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims (8)

1. A performance improvement control method of a DAB-LLC Sigma converter is characterized by comprising the following steps: the method comprises the following steps:
acquiring load current and output voltage of a DAB-LLC Sigma converter;
when the absolute value of the load current change amount is less than or equal to a preset threshold, executing steady-state control: regulating a phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform stable control on the output voltage;
when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: aiming at the LLC converter, the optimal trajectory control is utilized, PWM driving pulse delay time is obtained according to the absolute value of load current variation and the transformer excitation inductance of the LLC converter, or PWM driving pulse shortening time is obtained according to the load current and the resonance period of the LLC converter, PWM pulses of one period are changed, and the state of the LLC converter is adjusted; regulating a phase shift angle of the DAB converter by adopting a voltage loop PI controller in combination with the acquired output voltage, and performing stable state recovery control on the output voltage;
specifically, the PWM driving pulse delay time is:
Figure FDA0003505386570000011
the PWM driving pulse shortening time is as follows:
Figure FDA0003505386570000012
wherein L ismTransformer magnetizing inductance, N, for LLC convertersLLCTransformer ratio, V, for LLC convertersiFor input voltage, TrIs the resonant period of the LLC converter, ILLFor light load current, IHLFor heavy load currents.
2. A method of performance boost control of a DAB-LLC Sigma converter as claimed in claim 1, characterized in that:
and selecting the transformer transformation ratio of the DAB converter and the LLC converter according to the rated power of the DAB-LLC Sigma converter and the expected power ratio of the DAB converter and the LLC converter.
3. A method of performance boost control for a DAB-LLC Sigma converter as claimed in claim 1, wherein:
the sampling frequency of the output voltage of the DAB-LLC Sigma converter is greater than or equal to the working frequency of the DAB converter, and the sampling frequency of the load current is greater than or equal to the working frequency of the LLC converter.
4. A method of performance boost control of a DAB-LLC Sigma converter as claimed in claim 1, characterized in that:
and when the steady-state control is executed, the load current control quantity is obtained according to the transformer transformation ratio of the DAB converter, the phase shift angle of the DAB converter, the input voltage of the DAB-LLC Sigma converter, the transformer side inductance and the switching frequency of the DAB converter.
5. A method of performance boost control of a DAB-LLC Sigma converter as claimed in claim 1, characterized in that:
the ratio of the LLC steady-state output current value to the total load current is the ratio of the power of the LLC converter to the sum of the power of the LLC converter and the power of the DAB converter.
6. A performance improvement control system of a DAB-LLC Sigma converter is characterized in that: the method comprises the following steps:
a data acquisition module configured to: acquiring load current and output voltage of a DAB-LLC Sigma converter;
a steady state control module configured to: when the absolute value of the load current change amount is less than or equal to a preset threshold, executing steady-state control: regulating the phase shift angle of the DAB converter by using a voltage loop PI controller in combination with the acquired output voltage to perform output voltage steady state control;
a transient control module configured to: when the absolute value of the load current change amount is larger than a preset threshold, performing transient control: aiming at the LLC converter, the optimal trajectory control is utilized, PWM driving pulse delay time is obtained according to the absolute value of load current variation and the transformer excitation inductance of the LLC converter, or PWM driving pulse shortening time is obtained according to the load current and the resonance period of the LLC converter, PWM pulses of one period are changed, and the state of the LLC converter is adjusted; regulating a phase shift angle of the DAB converter by adopting a voltage loop PI controller in combination with the acquired output voltage, and performing stable state recovery control on the output voltage;
specifically, the PWM driving pulse delay time is:
Figure FDA0003505386570000031
the PWM driving pulse shortening time is as follows:
Figure FDA0003505386570000032
wherein L ismTransformer magnetizing inductance, N, for LLC convertersLLCTransformer ratio, V, for LLC converteriFor input voltage, TrIs the resonant period of the LLC converter, ILLFor light load current, IHLFor heavy load currents.
7. A computer readable storage medium having a program stored thereon, the program, when being executed by a processor, realizing the steps in the method for performance improvement control of a DAB-LLC Sigma converter as claimed in any one of the claims 1-5.
8. An electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps in the method for performance enhancement control of a DAB-LLC Sigma converter as claimed in any one of claims 1 to 5.
CN202110467472.8A 2021-04-28 2021-04-28 Performance improvement control method of DAB-LLC Sigma converter Active CN113162429B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110467472.8A CN113162429B (en) 2021-04-28 2021-04-28 Performance improvement control method of DAB-LLC Sigma converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110467472.8A CN113162429B (en) 2021-04-28 2021-04-28 Performance improvement control method of DAB-LLC Sigma converter

Publications (2)

Publication Number Publication Date
CN113162429A CN113162429A (en) 2021-07-23
CN113162429B true CN113162429B (en) 2022-06-07

Family

ID=76872091

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110467472.8A Active CN113162429B (en) 2021-04-28 2021-04-28 Performance improvement control method of DAB-LLC Sigma converter

Country Status (1)

Country Link
CN (1) CN113162429B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117013831A (en) * 2023-08-11 2023-11-07 太原理工大学 Hybrid ISOP-based wide input voltage range DC-DC converter and voltage regulating method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790591A (en) * 2016-04-22 2016-07-20 东北电力大学 Hybrid DC converter
CN109873562A (en) * 2019-02-11 2019-06-11 安徽工业大学 A kind of LLC resonant converter structure and its control method
CN110719035A (en) * 2019-12-05 2020-01-21 中南大学 Topological structure of single-stage DAB-LLC hybrid bidirectional DC-DC converter
CN110739852A (en) * 2018-07-18 2020-01-31 通用电气公司 Resonant power supply, method of controlling the same, and non-transitory computer-readable storage medium
CN112054691A (en) * 2020-09-04 2020-12-08 武汉大学 Single-stage voltage-regulating conversion circuit sharing rectification structure and control method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9318946B2 (en) * 2013-04-23 2016-04-19 Virginia Tech Intellectual Properties, Inc. Optimal trajectory control for LLC resonant converter for soft start-up
US9276480B2 (en) * 2013-04-23 2016-03-01 Virginia Polytechnic Institute And State University Optimal trajectory control for LLC resonant converter for LED PWM dimming
CN107666244B (en) * 2016-07-29 2020-11-27 中兴通讯股份有限公司 Control method and device of resonant converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790591A (en) * 2016-04-22 2016-07-20 东北电力大学 Hybrid DC converter
CN110739852A (en) * 2018-07-18 2020-01-31 通用电气公司 Resonant power supply, method of controlling the same, and non-transitory computer-readable storage medium
CN109873562A (en) * 2019-02-11 2019-06-11 安徽工业大学 A kind of LLC resonant converter structure and its control method
CN110719035A (en) * 2019-12-05 2020-01-21 中南大学 Topological structure of single-stage DAB-LLC hybrid bidirectional DC-DC converter
CN112054691A (en) * 2020-09-04 2020-12-08 武汉大学 Single-stage voltage-regulating conversion circuit sharing rectification structure and control method

Also Published As

Publication number Publication date
CN113162429A (en) 2021-07-23

Similar Documents

Publication Publication Date Title
CN108039822B (en) Instantaneous current control method of double-active full-bridge direct current converter
CN111490681A (en) Quasi-resonance switch power supply controller based on valley bottom locking
TWI601367B (en) A DC-DC Converter Based on Load Current Modulation Full-Bridge Control Mode
CN102223077B (en) Sliding-mode controller of LLC (logic link control) series resonance DC-DC converter and control method thereof
CN109687719A (en) A kind of modulator approach for the two-way isolation type DC-DC converter of CLLC
CN102882376B (en) A kind of method of controller and power converter and control power converter
CN104022640A (en) DC-DC converter of single inductor output driver based on resonance and method
CN111628655B (en) Transient direct current bias universal phase shift control method for double-active bridge direct current converter
CN110112913B (en) Direct current converter model prediction control method based on Fal function filter
CN103138588A (en) Direct current (DC)/DC converter controlled in digital mode and efficiency optimization method thereof
JP7446260B2 (en) power converter
CN110719035B (en) Topological structure of single-stage DAB-LLC hybrid bidirectional DC-DC converter
CN113162429B (en) Performance improvement control method of DAB-LLC Sigma converter
WO2023236668A1 (en) Adaptive switch-cycle control method applied to switch power supply
WO2024140352A1 (en) Control method and system for resonant converter
CN112054694A (en) Bidirectional converter optimization control method and device based on minimum current stress
CN204858970U (en) A on -off controller for having power converter of variable output voltage scope
CN113179022B (en) Passive soft start method, system, medium and equipment for double-active-bridge converter
CN112953245B (en) Double-active bridge converter full-load range soft switch control method
EP3459091A1 (en) Resonant converters with variable inductor
CN112803740B (en) Soft start method and system for mixed input series output parallel DC transformer
CN110994986B (en) Power supply control method
CN104578766A (en) Bridge-type multilevel switched capacitor converter
CN109546861B (en) Method for dynamically adjusting voltage conversion rate of LLC resonant cavity
CN110943620A (en) Phase-shifting sliding mode control method and system of LLC resonant DC converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant