CN113992023A - Isolated double-resonance bidirectional direct-current transformer - Google Patents

Isolated double-resonance bidirectional direct-current transformer Download PDF

Info

Publication number
CN113992023A
CN113992023A CN202111239692.1A CN202111239692A CN113992023A CN 113992023 A CN113992023 A CN 113992023A CN 202111239692 A CN202111239692 A CN 202111239692A CN 113992023 A CN113992023 A CN 113992023A
Authority
CN
China
Prior art keywords
resonant
transformer
voltage
low
current bus
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.)
Granted
Application number
CN202111239692.1A
Other languages
Chinese (zh)
Other versions
CN113992023B (en
Inventor
陈章勇
韩雨伯
吴云峰
刘翔宇
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.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
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 University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN202111239692.1A priority Critical patent/CN113992023B/en
Publication of CN113992023A publication Critical patent/CN113992023A/en
Application granted granted Critical
Publication of CN113992023B publication Critical patent/CN113992023B/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
    • H02M3/33584—Bidirectional converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/38—Means for preventing simultaneous conduction of switches
    • 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

Abstract

The invention provides an isolated double-resonance bidirectional direct current transformer, and belongs to the technical field of power electronics. The transformer adjusts the form of series connection of an inductor and a capacitor in the traditional resonant topological structure, the resonant inductor is arranged between two switching tubes on the same side, the direct connection of adjacent switches can be resisted in a certain time, and in the time, the switching tubes and a main power circuit can be protected by stopping or starting an additional fault-tolerant control and auxiliary circuit through the detection of the inductor current, so that the operation reliability of the transformer is improved; meanwhile, the isolated double-resonance bidirectional direct-current transformer has the advantages that the direct-current bus voltage transformation is easy to realize, and the bidirectional effect is good; and because zero current switching is realized, higher energy transmission efficiency can be realized, and the advantage of high power density of the resonant topology is also achieved.

Description

Isolated double-resonance bidirectional direct-current transformer
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to an isolated double-resonance bidirectional direct-current transformer.
Background
In a direct current micro grid, different bus voltage levels of 400V, 220V, 100V, 48V, 12V and the like exist generally, and since the power flowing direction between buses is random generally, a bidirectional direct current transformer is needed to match between different buses. For the consideration of electrical isolation, such dc transformers usually adopt an isolated topology; meanwhile, in order to realize efficient transmission of energy, it is also generally required that the dc transformer topology can realize soft switching, including zero-voltage switching or zero-current switching.
The common bidirectional dc transformer topology mainly includes: Dual-Active-Bridge (DAB) topology[1]LLC resonant topology[2]CLLC resonance topology[3]And the like, wherein: the DAB topology usually adopts Pulse Width Modulation (PWM), but the inductance volume of the DAB topology is usually large, which is not favorable for the miniaturization and light weight of the dc transformer structure; compared with the DAB topology, the resonant topologies such as LLC and CLLC can significantly reduce the volume of passive devices (inductors, capacitors, etc.) due to the realization of resonance. In addition, the direct current transformer is used as a key link in energy transmission of the direct current microgrid, once the direct current transformer fails, voltage drop, voltage overshoot, even short circuit failure in the direct current microgrid and further fire may be caused, and the failures bring great safety problems to a system and a power utilization side. Therefore, in practical use, reliable operation thereof is required. However, the topologies such as DAB, LLC, CLLC generally adopt a bridge circuit, and when the driving circuit or the switching tube itself fails, the bridge arm may be led through, further causing the switching tube to be burned or even the entire power circuit to be damaged.
Therefore, how to improve the safety of the isolated resonant bidirectional dc transformer becomes a research hotspot.
[1]Costinett D,Nguyen H,Zane R,et al.GaN-FET based dual active bridge DC-DC converter[C]//2011Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition(APEC).IEEE,2011:1425-1432.
[2] Research and implementation of Chenshen, Lvxueyu, Yanwei and LLC resonant soft-switching DC transformer [ J ]. electrotechnical Commission, 2014,27(10):163-169.
[3]Zhao C,Hsieh Y H,Lee F C,et al.Design and Analysis of a High-frequency CLLC Resonant Converter with Medium Voltage insulation for Solid-State-Transformer[C]//2021 IEEE Applied Power Electronics Conference and Exposition(APEC).IEEE,2021:1638-1642.
Disclosure of Invention
In view of the problems in the background art, the present invention is directed to an isolated dual-resonant bidirectional dc transformer. The transformer adjusts the series connection form of the inductor and the capacitor in the traditional resonance topological structure, the resonance inductor is arranged between the two switching tubes on the same side, the direct connection of adjacent switches can be resisted within a certain time, and meanwhile, the zero-current switch can be realized to improve the energy transmission efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an isolated dual-resonance bidirectional DC transformer comprises four switching tubes S1、S2、S3、S4Two resonant inductors Lr1、Lr2Two resonant capacitors Cr1、Cr2High side capacitance CHLow voltage side capacitor CLAnd a high-frequency transformer T; wherein, the high-voltage side capacitor CHThe positive electrode of the high-voltage direct-current bus is connected with the positive electrode of the high-voltage direct-current bus, and the high-voltage side capacitor CHThe negative electrode of the high-voltage direct-current bus is connected with the negative electrode of the high-voltage direct-current bus; first switch tube S1The drain electrode is connected with the positive electrode of the high-voltage direct-current bus, and the source electrode is connected with the first resonant inductor Lr1And a first resonant capacitor Cr1One terminal of (1), a first resonant inductor Lr1The other end of the first switch tube S is connected with a second switch tube S2Drain electrode of (1), second switching tube S2The source electrode of the high-voltage direct-current bus is connected with the negative electrode of the high-voltage direct-current bus and a first resonant capacitor Cr1The other end of the high-frequency transformer T is connected with a primary homonymous end of the high-frequency transformer T, and a primary synonym end of the high-frequency transformer T is connected with a negative electrode of the high-voltage direct-current bus; low voltage side capacitance CLThe positive electrode of the capacitor is connected with the positive electrode of the low-voltage direct-current bus, and the low-voltage side capacitor CLThe negative electrode of the low-voltage direct current bus is connected with the negative electrode of the low-voltage direct current bus; fourth switch tube S4The drain electrode of the second switching tube is connected with the positive electrode of the low-voltage direct current bus and the fourth switching tube S4Is connected to the second resonant inductor Lr2And a second resonant capacitor Cr2One terminal of (1), a second resonant inductor Lr2The other end of the first switch is connected with a third switchPipe S3The drain electrode of the third switching tube S3The source electrode of the first resonant capacitor is connected with the negative electrode of the low-voltage direct current bus and the second resonant capacitor Cr2The other end of the high-frequency transformer T is connected with a secondary synonym end of the high-frequency transformer T, and a secondary synonym end of the high-frequency transformer T is connected with a negative electrode of the low-voltage direct-current bus.
Further, the first switch tube S1And a third switching tube S3Is kept consistent, the second switch tube S2And a fourth switching tube S4The on-off of the switch is kept consistent.
Further, the voltage gain of the transformer from the high voltage side to the low voltage side is 1/n, the voltage gain from the low voltage side to the high voltage side is n, n is a transformation ratio, and n is VH/VL。
Further, the closer the switching waveform duty cycles of the four switching tubes are, the more favorable the reliability of the transformer is.
Further, a second resonant inductor Lr2And a first resonant inductor Lr1Should satisfy the relation Lr2＝Lr1/n2。
Further, in order to prevent the high frequency transformer excitation inductance or the low frequency transformer excitation inductance from affecting the resonance process, the inductance of the high frequency transformer excitation inductance or the low frequency transformer excitation inductance should be different from the inductance of the resonance inductance by two orders of magnitude.
Further, the larger the inductance of the resonant inductor, the longer the time for the adjacent switch tube to resist the shoot-through (due to the rising slope of the inductor current being V)H,L/Lr1,2Then at VHOr VLUnder the premise of no change, the larger the inductance, the smaller the slope, and the longer the time required for the inductor current to rise to saturation).
The mechanism of the invention is as follows:
when a failure occurs in the drive circuit or the switching tube, the switching tube (S) on the same side may be caused1And S2Or S3And S4) If the switch tube on the same side is conducted by mistake, the traditional bridge topology will be damaged irreversibly. Taking the high-voltage side as an example, if the transformer designed by the invention is in error conductionResulting same-side switch tube direct-connection, resonance inductance Lr1The current in (1) will be due to the high side voltage VHThe current rises after charging, and before the inductor is saturated, the current sharp rise is detected within the time of at least nanosecond, so that a relevant processor and the like can conveniently judge to stop the direct current transformer or call a relevant fault-tolerant control and fault-tolerant auxiliary circuit, and the power circuit is further protected from being damaged. For temporary extremely short through, the circuit can be temporarily repaired without causing the damage of the switching tube; thus, an improvement of the safety of the transformer is achieved.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the isolated double-resonance bidirectional direct-current transformer has the advantages that the direct-current bus voltage transformation is easy to realize, and the bidirectional effect is good; meanwhile, as zero-current switching is realized, higher energy transmission efficiency can be realized, and the advantage of high power density of the resonant topology is also achieved;
2. compared with topology structures such as DAB, LLC, CLLC and the like based on a bridge structure, the converter structure is beneficial to resisting adjacent switch direct connection within a certain time (the time is determined by inductance between the switch tubes) by serially connecting the inductors between the switch tubes, and the switch tubes and a main power circuit can be protected by detecting inductor current to stop or start an additional fault-tolerant control and auxiliary circuit during the time, so that the operation reliability is improved.
Drawings
Fig. 1 is a topology structure diagram of an isolated dual-resonant bidirectional dc transformer according to the present invention.
Fig. 2 is a first working mode of the isolated dual-resonant bidirectional dc transformer topology provided by the present invention.
Fig. 3 is a second working mode of the isolated dual-resonant bidirectional dc transformer topology provided by the present invention.
Fig. 4 is a key waveform diagram of the isolated dual-resonant bidirectional dc transformer topology provided by the present invention.
Fig. 5 is a simulated waveform diagram of the resonant inductance of the isolated dual-resonant bidirectional dc transformer according to embodiment 1 of the present invention (energy is transmitted from the high-voltage side to the low-voltage side).
Fig. 6 is a simulated waveform diagram of the high-low voltage side voltage of the isolated dual-resonant bidirectional dc transformer according to embodiment 1 of the present invention (energy is transmitted from the high-voltage side to the low-voltage side).
Fig. 7 is a simulated waveform diagram of the resonant inductance of the isolated dual-resonant bidirectional dc transformer according to embodiment 1 of the present invention (energy is transmitted from the low-voltage side to the high-voltage side).
Fig. 8 is a simulated waveform diagram of the high-low voltage side voltage of the isolated dual-resonant bidirectional dc transformer according to embodiment 1 of the present invention (energy is transmitted from the low-voltage side to the high-voltage side).
Fig. 9 is a simulated waveform diagram of the resonant inductor current (energy is transmitted from the high-voltage side to the low-voltage side) when the high-voltage side switching tube of the isolated dual-resonant bidirectional dc transformer of embodiment 1 of the present invention is temporarily turned on simultaneously.
Fig. 10 is a simulated waveform diagram of high-low side voltage (energy is transmitted from the high-voltage side to the low-voltage side) when the high-voltage side switching tube is temporarily and simultaneously conducted in the isolated dual-resonant bidirectional dc transformer according to embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
An isolated dual-resonance bidirectional dc transformer is shown in fig. 1, and comprises four switching tubes S1、S2、S3、S4Two resonant inductors Lr1、Lr2Two resonant capacitors Cr1、Cr2Two piezoelectric side capacitors CH、CLAnd a high-frequency transformer T; wherein, the high-voltage side capacitor CHThe positive electrode of the high-voltage direct-current bus is connected with the positive electrode of the high-voltage direct-current bus, and the high-voltage side capacitor CHThe negative electrode of the high-voltage direct-current bus is connected with the negative electrode of the high-voltage direct-current bus; first switch tube S1The drain electrode is connected with the positive electrode of the high-voltage direct-current bus, and the source electrode is connected with the first resonant inductor Lr1And a first resonant capacitor Cr1One terminal of (1), a first resonant inductor Lr1The other end of the first switch tube S is connected with a second switch tube S2Drain electrode of (1), second switching tube S2The source electrode of the high-voltage direct-current bus is connected with the negative electrode of the high-voltage direct-current bus and a first resonant capacitor Cr1The other end of the high-frequency transformer T is connected with a primary homonymous end of the high-frequency transformer T, and a primary synonym end of the high-frequency transformer T is connected with a negative electrode of the high-voltage direct-current bus; low voltage side capacitance CLThe positive electrode of the capacitor is connected with the positive electrode of the low-voltage direct-current bus, and the low-voltage side capacitor CLThe negative electrode of the low-voltage direct current bus is connected with the negative electrode of the low-voltage direct current bus; fourth switch tube S4The drain electrode of the second switching tube is connected with the positive electrode of the low-voltage direct current bus and the fourth switching tube S4Is connected to the second resonant inductor Lr2And a second resonant capacitor Cr2One terminal of (1), a second resonant inductor Lr2The other end of the first switch tube is connected with a third switch tube S3The drain electrode of the third switching tube S3The source electrode of the first resonant capacitor is connected with the negative electrode of the low-voltage direct current bus and the second resonant capacitor Cr2The other end of the high-frequency transformer T is connected with a secondary synonym end of the high-frequency transformer T, and a secondary synonym end of the high-frequency transformer T is connected with a negative electrode of the low-voltage direct-current bus.
The isolated double-resonance bidirectional direct-current transformer topology mainly comprises two working modes:
a first mode of operation: as shown in fig. 2 and 4, t0At any moment, switch tube S1And a switching tube S3Zero current turn-on, resonant capacitor Cr1Resonant capacitor Cr2And a resonant inductor Lr2Participate in resonance. In this mode, the resonant inductance L needs to be maintainedr2Resonates to 0 and then performs mode switching. When energy is transmitted from the high-voltage side to the low-voltage side, the low-voltage side voltage is maintained by the low-voltage side capacitor; when energy is transferred from the low-voltage side to the high-voltage side, the high-voltage side voltage is maintained by the high-voltage side capacitor.
The second working mode is as follows: as shown in fig. 3 and 4, t1At any moment, switch tube S1And a switching tube S3Zero current turn-off, switch tube S2And a switching tube S4Zero current turn-on, resonant capacitor Cr1Resonant capacitor Cr2And a resonant inductor Lr1Participate in resonance. In this mode, the resonant inductance L needs to be maintainedr1Resonates to 0 and then performs mode switching.
Based on the above analysis, the voltage gain of the topology from the high voltage side to the low voltage side is 1/n, and the voltage gain from the low voltage side to the high voltage side is n.
Example 1
In order to verify the working mode, a simulation experiment is carried out on the circuit with the topological structure, and simulation parameters are as follows: resonant inductor Lr1Inductance of 2.2 muH, resonant inductance Lr2Inductance of 120nH, resonant capacitor Cr1Capacitance value of 600nF, resonant capacitance Cr2The capacitance value is 9 muF, the transformation ratio of the high-frequency transformer is 4:1, the voltage of the high-voltage side is about 48V, the voltage of the low-voltage side is about 12V, and the duty ratios of the switching tubes on the same side are respectively 50%.
Resonant inductor L when energy is transferred from high voltage side to low voltage sider1Current i _ Lr1 and resonant inductance Lr2The waveforms of the current i _ Lr2 and the switching signal are shown in fig. 5. As can be seen from FIG. 5, in the switching tube S1And S3When both switching signals are the same, the resonant inductor L is turned offr2The current in (1) drops to 0, thus realizing the switch tube S1And S3Zero current off; at the switch tube S2And S4When both switching signals are the same, the resonant inductor L is turned offr1The current in (1) drops to 0, thus realizing the switch tube S2And S4The zero current of (c) is turned off. At this time, the high-voltage side voltage VHSupplied by a bus, a relatively constant, low-side voltage VLConverted by the converter, the waveforms of the two are shown in FIG. 6, and the voltage V on the low-voltage side can be seenLStabilize at around 12V.
Resonant inductor L when energy is transferred from low voltage side to high voltage sider1Current i _ Lr1 and resonant inductance Lr2The waveforms of the current i _ Lr2 and the switching signal are shown in fig. 7. As can be seen from FIG. 7, in the switching tube S1And S3When both switching signals are the same, the resonant inductor L is turned offr2The current in (1) drops to 0, thus realizing the switch tube S1And S3Zero current off; at the switch tube S2And S4When both switching signals are the same, the resonant inductor L is turned offr1The current in (1) drops to 0, thus realizing the switch tube S2And S4The zero current of (c) is turned off. Since the energy transfer direction was opposite to that of the previous set of simulations, the inductor current waveform was also opposite. At this time, the low-voltage side voltage VLSupplied by a bus, a relatively constant, high-side voltage VHConverted by the converter, the waveforms of the two are shown in FIG. 8, and the voltage V on the high-voltage side can be seenHStabilize at around 48V.
Taking the working condition when energy is transmitted from the high-voltage side to the low-voltage side as an example, when the two switching tubes on the high-voltage side are temporarily connected in a straight-through manner in the vicinity of 0.005s, the switching waveforms and the current waveforms (i _ Lr1 and i _ Lr2) in the two resonant inductors are as shown in fig. 9, and two current amplitudes are obviously increased. High side voltage VHAnd a low-side voltage VLThe waveforms are shown in FIG. 10, and it can be seen that the low-side voltage V is after the occurrence of the temporary shoot-through faultLOver-charging occurs to a certain extent, and after fault repair, the voltage V at the low-voltage sideLThe value of (A) is stabilized at about 12V again, and the simulation waveform verifies the capability of the circuit for resisting the simultaneous conduction of the switch tubes on the same side.
In conclusion, the isolated double-resonance bidirectional direct current transformer topology provided by the invention has the advantages that the direct current bus voltage transformation is easy to realize, the bidirectional effect is good, and the high energy transmission efficiency can be realized due to the realization of zero-current switching. In addition, due to the existence of series inductance between the switching tubes, the capability of the topology for resisting the direct connection of adjacent switches is improved, and the capability of reliable operation of the direct current transformer is improved.
While the invention has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.

Claims (7)

1. An isolated dual-resonance bidirectional DC transformer is characterized in that the transformer comprises four switching tubes (S)1、S2、S3、S4) Two resonant inductors (L)r1、Lr2) Two resonant capacitors (C)r1、Cr2) High side capacitance (C)H) Low voltage side capacitance (C)L) And a high-frequency transformer (T); wherein, the high voltage side capacitor (C)H) The positive electrode of the high-voltage direct-current bus is connected with the positive electrode of the high-voltage direct-current bus, and the high-voltage side capacitor (C)H) The negative electrode of the high-voltage direct-current bus is connected with the negative electrode of the high-voltage direct-current bus; a first switch tube (S)1) The drain electrode is connected with the positive electrode of the high-voltage direct-current bus, and the source electrode is connected with a first resonant inductor (L)r1) And a first resonant capacitor (C)r1) One terminal of (1), the first resonant inductance (L)r1) Is connected with a second switch tube (S)2) Drain electrode of (1), second switching tube (S)2) The source electrode of the first resonant capacitor (C) is connected with the negative electrode of the high-voltage direct-current busr1) The other end of the high-frequency transformer (T) is connected with a primary homonymous end of the high-frequency transformer (T), and a primary synonym end of the high-frequency transformer (T) is connected with a negative electrode of the high-voltage direct-current bus; low side capacitance (C)L) The positive electrode of the capacitor is connected with the positive electrode of the low-voltage direct current bus and the low-voltage side capacitor (C)L) The negative electrode of the low-voltage direct current bus is connected with the negative electrode of the low-voltage direct current bus; fourth switch tube (S)4) The drain electrode of the second switch tube is connected with the positive electrode of the low-voltage direct current bus and the fourth switch tube (S)4) Is connected to the second resonant inductor (L)r2) And a second resonant capacitor (C)r2) One terminal of (1), the second resonant inductance (L)r2) The other end of the first switch tube is connected with a third switch tube (S)3) Drain electrode of (1), third switching tube (S)3) The source electrode of the first resonant capacitor is connected with the negative electrode of the low-voltage direct current bus and the second resonant capacitor (C)r2) The other end of the high-frequency transformer (T) is connected with a secondary synonym end of the high-frequency transformer (T), and a secondary synonym end of the high-frequency transformer (T) is connected with a negative electrode of the low-voltage direct-current bus.
2. An isolated double-resonant bidirectional DC transformer according to claim 1, characterized by a first switching tube (S)1) And a third switching tube (S)3) Is kept consistent, the second switch tube (S)2) And a fourth switching tube (S)4) The on-off of the switch is kept consistent.
3. The isolated dual-resonant bidirectional DC transformer of claim 1, wherein the DC transformer has a voltage from a high-side to a low-sideGain is 1/n, voltage gain from low voltage side to high voltage side is n, n is transformation ratio, n is VH/VL。
4. The isolated double-resonance bidirectional direct-current transformer according to claim 1, wherein the closer the switching waveform duty cycles of the four switching tubes are, the better the reliability of the direct-current transformer is.
5. An isolated double-resonant bidirectional DC transformer according to claim 1, characterized in that the second resonant inductance (L)r2) And a first resonant inductance (L)r1) Should satisfy the relation Lr2＝Lr1/n2。
6. The isolated dual-resonant bi-directional dc transformer of claim 1, wherein the inductance of the resonant inductor is different from the inductance of the high frequency transformer or the low frequency transformer to prevent the high frequency transformer or the low frequency transformer from affecting the resonant process.
7. The isolated dual-resonant bidirectional dc transformer of claim 1, wherein the larger the inductance of the resonant inductor, the longer the time adjacent switching tubes resist shoot-through.
CN202111239692.1A 2021-10-25 2021-10-25 Isolated double-resonance bidirectional direct-current transformer Active CN113992023B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111239692.1A CN113992023B (en) 2021-10-25 2021-10-25 Isolated double-resonance bidirectional direct-current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111239692.1A CN113992023B (en) 2021-10-25 2021-10-25 Isolated double-resonance bidirectional direct-current transformer

Publications (2)

Publication Number Publication Date
CN113992023A true CN113992023A (en) 2022-01-28
CN113992023B CN113992023B (en) 2023-04-25

Family

ID=79740848

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111239692.1A Active CN113992023B (en) 2021-10-25 2021-10-25 Isolated double-resonance bidirectional direct-current transformer

Country Status (1)

Country Link
CN (1) CN113992023B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117411324A (en) * 2023-12-15 2024-01-16 国网福建省电力有限公司 Power transformer integrated calibrating device power supply and control method thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170093287A1 (en) * 2015-09-30 2017-03-30 Murata Manufacturing Co., Ltd. Dc/dc conversion apparatus
KR101837603B1 (en) * 2016-11-10 2018-03-12 주식회사 팩테크 Llc resonant converter operating in wide input or output voltage range
CN109245520A (en) * 2018-11-21 2019-01-18 北京理工大学 DC converter and its control method based on boost type Cuk double resonance
CN110086352A (en) * 2019-06-10 2019-08-02 哈尔滨工业大学（深圳） A kind of resonance reversible transducer suitable for wide output area
CN110266194A (en) * 2019-07-03 2019-09-20 江苏恰德森科技有限公司 A kind of bidirectional DC-DC converter of symmetric resonator
CN110299849A (en) * 2019-08-01 2019-10-01 河北工业大学 A kind of interleaving shunt-wound two-transistor forward power converter of phase shifting control
CN110365219A (en) * 2019-08-16 2019-10-22 北京机械设备研究所 A kind of two-way DC/DC circuit
WO2019212107A1 (en) * 2018-05-02 2019-11-07 주식회사 팩테크 Llc resonant converter and method of operating same
CN210780552U (en) * 2019-07-03 2020-06-16 江苏恰德森科技有限公司 Bidirectional DC-DC converter with symmetrical resonant cavity

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170093287A1 (en) * 2015-09-30 2017-03-30 Murata Manufacturing Co., Ltd. Dc/dc conversion apparatus
KR101837603B1 (en) * 2016-11-10 2018-03-12 주식회사 팩테크 Llc resonant converter operating in wide input or output voltage range
WO2019212107A1 (en) * 2018-05-02 2019-11-07 주식회사 팩테크 Llc resonant converter and method of operating same
CN109245520A (en) * 2018-11-21 2019-01-18 北京理工大学 DC converter and its control method based on boost type Cuk double resonance
CN110086352A (en) * 2019-06-10 2019-08-02 哈尔滨工业大学（深圳） A kind of resonance reversible transducer suitable for wide output area
CN110266194A (en) * 2019-07-03 2019-09-20 江苏恰德森科技有限公司 A kind of bidirectional DC-DC converter of symmetric resonator
CN210780552U (en) * 2019-07-03 2020-06-16 江苏恰德森科技有限公司 Bidirectional DC-DC converter with symmetrical resonant cavity
CN110299849A (en) * 2019-08-01 2019-10-01 河北工业大学 A kind of interleaving shunt-wound two-transistor forward power converter of phase shifting control
CN110365219A (en) * 2019-08-16 2019-10-22 北京机械设备研究所 A kind of two-way DC/DC circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SHAHID IQBAL: "Double LLC resonant tanks based DC-DC converter with integrated dual transformers for PV power systems" *
陈辰: "半桥LLC谐振变换器参数设计优化研究" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117411324A (en) * 2023-12-15 2024-01-16 国网福建省电力有限公司 Power transformer integrated calibrating device power supply and control method thereof

Also Published As

Publication number Publication date
CN113992023B (en) 2023-04-25

Similar Documents

Publication Publication Date Title
US9419531B2 (en) Forward-flyback DC-DC converter using resonant LC output circuit
CN101728958B (en) Method and control device for controlling isolated converter by tail current
KR101923317B1 (en) Bidirectional full-bridge converter and control method thereof
CN110635684B (en) Single-tube quasi-Z-source Boost converter
CN209375473U (en) A kind of circuit of reversed excitation
CN102237802A (en) Resonant capacitor clamping circuit in resonant converter
CN210120487U (en) Clamping circuit and flyback converter
CN101635530A (en) Single-stage forward type high-frequency linked inverter
Lu et al. 1kW, 400V/12V high step-down DC/DC converter: Comparison between phase-shifted full-bridge and LLC resonant converters
CN113992023B (en) Isolated double-resonance bidirectional direct-current transformer
CN114094836A (en) Bidirectional half-bridge LLC resonant converter circuit structure based on transformer secondary winding grouping current sharing and pulse width modulation method
WO2024051320A1 (en) Wide-range efficient isolated bidirectional converter
CN103296896B (en) A kind of soft switch isolation type boost direct current converter and control method thereof
CN211557153U (en) Novel bidirectional full-bridge switching circuit
CN102739064B (en) Soft-switch full wave rectifying push-pull normal shock inverter
CN2854919Y (en) High frequency switch power circuit
CN111596130A (en) Method for improving efficiency of energy router by utilizing resonant frequency detection technology
CN109742957B (en) Double-ring full-resonance type soft switching converter
Lokesha et al. LLC resonant converter design and development
Bhajana et al. A new non-isolated ZCS bidirectional buck–boost DC–DC converter for energy storage applications in electric vehicles
CN113422515B (en) Non-isolated bidirectional soft switch DC-DC converter
CN108347174A (en) A kind of Boost full-bridge isolateds converter and its compound-active-clamp circuit
CN202978716U (en) Soft switch full wave rectification push-pull forward converter
CN208158436U (en) A kind of synchronous rectification inverse-excitation type DC-DC power conversion equipment
CN208158437U (en) A kind of Boost full-bridge isolated converter and its compound-active-clamp circuit

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