CN112910262A - Isolation DC-DC converter integrating DAB and LLC resonant circuit - Google Patents
Isolation DC-DC converter integrating DAB and LLC resonant circuit Download PDFInfo
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- CN112910262A CN112910262A CN202110078397.6A CN202110078397A CN112910262A CN 112910262 A CN112910262 A CN 112910262A CN 202110078397 A CN202110078397 A CN 202110078397A CN 112910262 A CN112910262 A CN 112910262A
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- 238000002955 isolation Methods 0.000 title abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 61
- 230000010363 phase shift Effects 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000005669 field effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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 an isolated DC-DC converter integrating DAB and LLC resonant circuits, which comprises a full-bridge double-active DC-DC converter, wherein the full-bridge double-active DC-DC converter comprises a primary side support capacitor, a first full bridge, an auxiliary inductor, a high-frequency transformer, a second full bridge and a secondary side support capacitor which are sequentially connected; the two-phase parallel LLC resonant circuit comprises a first resonant cavity, a second resonant cavity, a first full-wave rectifying circuit, a second full-wave rectifying circuit and an output support capacitor. The double-active full-bridge DCDC converter can realize double transmission of energy by controlling the size of an external phase shift angle, and can realize efficiency optimization control by controlling the phase shift angle. And the two-phase parallel LLC resonant converter can be controlled by frequency modulation. Compared with the traditional scheme, the invention reduces the using quantity of the power switch tubes, reduces the power loss, improves the overall efficiency and reduces the cost. Meanwhile, the high-frequency isolation transformer is arranged, and the electrical isolation function can be realized.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to an isolated DC-DC converter integrating DAB and LLC resonant circuits.
Background
With the massive access of distributed energy, energy storage systems and electric automobiles, direct current power distribution networks have received extensive attention. In a direct-current power distribution network, a DC-DC converter as a core control device not only needs to be connected with voltage buses of different grades, but also needs to convert the voltage of the direct-current bus to obtain stable direct-current voltage to supply power to a direct-current load. However, the current DC-DC converter for supplying low voltage DC load usually needs to be connected to the high voltage DC bus and then perform voltage conversion by the DC-DC converter, which requires more power switching tubes, thereby increasing the power loss of the converter, decreasing the efficiency, and increasing the cost.
Disclosure of Invention
The invention aims to provide an isolated DC-DC converter integrating DAB and LLC resonant circuits, which reduces the use number of power switching tubes, reduces power loss, improves the overall efficiency and reduces the cost. Meanwhile, the high-frequency isolation transformer is arranged, and the electrical isolation function can be realized.
In order to achieve the purpose, the invention provides the following technical scheme: an isolated DC-DC converter integrating DAB and LLC resonant circuits, comprising
The full-bridge double-active DC-DC converter comprises a primary side support capacitor, a first full bridge, an auxiliary inductor, a high-frequency transformer, a second full bridge and a secondary side support capacitor which are sequentially connected;
the two-phase parallel LLC resonant circuit comprises a first resonant cavity, a second resonant cavity, a first full-wave rectifying circuit, a second full-wave rectifying circuit and an output support capacitor.
Compared with the prior art, the invention has the beneficial effects that: the double-active full-bridge DC-DC converter can realize double transmission of energy by controlling the size of an external phase shift angle, and can realize efficiency optimization control by controlling the phase shift angle. And the two-phase parallel LLC resonant converter can be controlled by frequency modulation. Compared with the traditional scheme, the invention reduces the using quantity of the power switch tubes, reduces the power loss, improves the overall efficiency and reduces the cost. Meanwhile, the high-frequency isolation transformer is arranged, and the electrical isolation function can be realized.
Drawings
Fig. 1 is a multi-port DC-DC converter of the present invention based on DAB and LLC resonant circuits.
Fig. 2 is a circuit operation waveform of the forward power transmission and reverse power transmission states of the DC-DC converter of the present invention.
Fig. 3 is a circuit diagram of the inventive DC-DC converter in a forward power transfer mode of operation 1.
Fig. 4 is a circuit diagram of the DC-DC converter of the present invention in the forward power transfer mode of operation 2.
Fig. 5 is a circuit diagram of the inventive DC-DC converter in the forward power transfer mode of operation 3.
Fig. 6 is a circuit diagram of the DC-DC converter of the present invention in the forward power transfer mode of operation 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: an isolated DC-DC converter integrating DAB and LLC resonant circuits, comprising
The full-bridge double-active DC-DC converter comprises a primary side support capacitor, a first full bridge, an auxiliary inductor, a high-frequency transformer, a second full bridge and a secondary side support capacitor which are sequentially connected;
the two-phase parallel LLC resonant circuit comprises a first resonant cavity, a second resonant cavity, a first full-wave rectifying circuit, a second full-wave rectifying circuit and an output support capacitor. The full-bridge double-active DC-DC converter is used for controlling power flow between the primary side direct current bus and the secondary side direct current bus; the two-phase parallel LLC resonant circuit provides a dc load port.
The first full bridge comprises
The first bridge arm comprises a drain electrode of a first power switch tube and a source electrode of a second power switch tube which are connected;
the second bridge arm comprises a drain electrode of a third power switching tube and a source electrode of a fourth power switching tube which are connected;
the first bridge arm, the second bridge arm and the primary side supporting capacitor are connected in parallel, a source electrode of the first power switch tube and a source electrode of the third power switch tube are connected with a positive electrode of the primary side supporting capacitor, a drain electrode of the second power switch tube and a drain electrode of the fourth switch tube are connected with a negative electrode of the primary side supporting capacitor, and a drain electrode of the first power switch tube is connected with the auxiliary inductor.
The second full bridge comprises
The third bridge arm comprises a drain electrode of a fifth power switching tube and a source electrode of a sixth power switching tube which are connected;
the fourth bridge arm comprises a drain electrode of a seventh power switching tube and a source electrode of an eighth power switching tube which are connected;
the third bridge arm, the fourth bridge arm and the secondary side support capacitor are connected in parallel, a source electrode of the fifth power switch tube and a source electrode of the seventh power switch tube are connected with the positive electrode of the secondary side support capacitor, and a drain electrode of the sixth power switch tube and a drain electrode of the eighth power switch tube are connected with the negative electrode of the secondary side support capacitor.
The first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube, the sixth power switch tube, the seventh power switch tube and the eighth power switch tube are all field effect transistors.
The homonymous end of the primary winding of the high-frequency transformer is connected with the auxiliary inductor, the synonym end of the primary winding of the high-frequency transformer is connected with the negative electrode of the primary side supporting capacitor, the homonymous end of the secondary winding of the high-frequency transformer is connected with the drain electrode of the fifth power switch tube, and the synonym end of the secondary winding of the high-frequency transformer is connected with the negative electrode of the secondary side supporting capacitor.
The first resonant cavity comprises a first resonant inductor L connected in seriesr1A first resonant capacitor Cr1And a first excitation inductance;
the second resonant cavity comprises a second resonant inductor L connected in seriesr2A second resonant capacitor Cr2And a second excitation inductance. Second resonant capacitor Cr2Is the second resonant frequency. First resonant inductor Lr1A first resonant capacitor Cr1Respectively connected with the second resonance inductor Lr2A second resonant capacitor Cr2And the first resonant frequency is equal to the second resonant frequency.
The first full-wave rectification circuit comprises a first middle tap transformer, a first power diode and a second power diode;
same-name end of primary winding of first intermediate tap transformer and first resonant inductor Lr1Connected to a first resonant inductor Lr1The first power switch tube and the second power switch tube are connected; the first middle tap transformer primary winding different name end and the first resonance capacitor Cr1Connected by a first resonant capacitor Cr1Is connected with the negative electrode of the primary side support capacitor; the dotted terminal of the first secondary winding of the first middle tap transformer is connected with the anode of a first power switch diode; the second secondary winding different-name end of the first middle tap transformer is connected with the anode of the second power switch tube; the first middle tap transformer has a first secondary winding with different name end and a second secondary winding with the same name end connected with the positive pole of the output voltage stabilizing capacitor;
the second full-wave rectification circuit comprises a second middle tap transformer, a third power diode and a fourth power diode;
the dotted terminal of the primary winding of the second center-tapped transformer and the second resonant inductor Lr2Connected to a second resonant inductor Lr2The third power switch tube and the fourth power switch tube are connected; the synonym terminal of the primary winding of the second intermediate tap transformer and a second resonance capacitor Cr2Connected to a second resonant capacitor Cr2Is connected with the cathode of the secondary side support capacitor; in the second placeThe dotted terminal of the first secondary winding of the indirect-tap transformer is connected with the anode of a diode of the third power switch; the second secondary winding synonym end of the second middle tap transformer is connected with the positive electrode of the fourth power switch tube; the first secondary winding transformer different-name end and the second secondary winding same-name end of the second middle tap transformer are connected with each other and connected with the positive electrode of the output voltage stabilizing capacitor;
the cathodes of the first power diode, the second power diode, the third power diode and the fourth power diode are connected with the anode of the output voltage stabilizing capacitor.
The full-bridge double-active DC-DC converter adopts phase shift control, and two parallel LLC adopts variable frequency and fixed frequency control;
the DAB phase shift control comprises single phase shift control, double phase shift control, expansion phase shift control and triple phase shift control.
Fig. 3 shows mode 1: [ t ] of0～t1]
For DAB, the primary power switch tubes S1 and S4 are conducted, the secondary power switch tubes S5 and S8 are conducted, and the auxiliary inductor current iLIs increased linearly when iLWhen negative, freewheeling occurs through the body diodes of power switches S1, S4 when iLIs positive, iLFlows through the power switches S1, S4. For the first LLC resonant circuit, the first resonant capacitor Cr1And a first resonant inductor Lr1Resonance occurs, a resonant current iLr1Varying in a sinusoidal manner, resonant current iLr1And exciting inductor current iLm1The difference is transmitted to the secondary side; for the second LLC resonant circuit, the second resonant capacitor Cr2And a second resonant inductor Lr2Resonance occurs, a resonant current iLr2Varying in a sinusoidal manner, resonant current iLr2And exciting inductor current iLm2The difference is passed to the secondary side. Before the power switch tubes S1 and S4 are turned on, the auxiliary inductor current and the resonant current discharge parasitic diodes of the power switch tubes S1 and S4, so that the power switch tubes operate in a zero-voltage on state.
Fig. 4 is mode 2: [ t ] of1～t2]
For DAB, the secondary side power devices S5 and S8 are closed, the power devices S6 and S7 are conducted, and the auxiliary power devicesAuxiliary inductor current iLThe primary side full-bridge state is unchanged, and the secondary side current passes through the power devices S6 and S7. For the first LLC resonant circuit, the first resonant capacitor Cr1And a first resonant inductor Lr1Resonance occurs, a resonant current iLr1Varying in a sinusoidal manner, resonant current iLr1And exciting inductor current iLm1The difference is transmitted to the secondary side; for the second LLC resonant circuit, the second resonant capacitor Cr2And a second resonant inductor Lr2Resonance occurs, a resonant current iLr2Varying in a sinusoidal manner, resonant current iLr2And exciting inductor current iLm2The difference is passed to the secondary side. Before the power devices S6 and S7 are turned on, the secondary-side current discharges parasitic diodes of the power devices S6 and S7, and the power devices operate in a zero-voltage on state.
Fig. 5 is mode 3: [ t ] of2～t3]
For DAB, the primary power switches S1 and S4 are turned off, the power switches S2 and S3 are turned on, and the auxiliary inductor current iLIn a linearly decreasing state when iLWhen the current is positive, the current freewheels through the body diodes of the power switching devices S2 and S3 when iLWhen it is negative, iLFlows through the power switches S2, S3. For the first LLC resonant circuit, the first resonant capacitor Cr1And a first resonant inductor Lr1Resonance occurs, a resonant current iLr1Varying in a sinusoidal manner, resonant current iLr1And exciting inductor current iLm1The difference is transmitted to the secondary side; for the second LLC resonant circuit, the second resonant capacitor Cr2And a second resonant inductor Lr2Resonance occurs, a resonant current iLr2Varying in a sinusoidal manner, resonant current iLr2And exciting inductor current iLm2The difference is passed to the secondary side. Before the power switch tubes S2 and S3 are turned on, the auxiliary inductor current and the resonant current discharge parasitic diodes of the power switch tubes S2 and S3, so that the power switch tubes operate in a zero-voltage on state.
Fig. 6 is modality 4: [ t ] of3～t4]
For DAB, the secondary side power devices S6 and S7 are closed, the power devices S5 and S8 are conducted, and the auxiliary inductor is connectedStream iLNegative, the primary side full bridge state is unchanged, and the secondary side current passes through power devices S5, S8. For the first LLC resonant circuit, the first resonant capacitor Cr1And a first resonant inductor Lr1Resonance occurs, a resonant current iLr1Varying in a sinusoidal manner, resonant current iLr1And exciting inductor current iLm1The difference is transmitted to the secondary side; for the second LLC resonant circuit, the second resonant capacitor Cr2And a second resonant inductor Lr2Resonance occurs, a resonant current iLr2Varying in a sinusoidal manner, resonant current iLr2And exciting inductor current iLm2The difference is passed to the secondary side. Before the power devices S5 and S8 are turned on, the secondary-side current discharges parasitic diodes of the power devices S5 and S8, and the power devices operate in a zero-voltage on state.
The reverse operation waveform of the proposed converter is similar to the forward operation waveform and is not described in detail.
Although the embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An isolated DC-DC converter integrating a DAB and LLC resonant circuit, characterized by: comprises that
The full-bridge double-active DC-DC converter comprises a primary side support capacitor, a first full bridge, an auxiliary inductor, a high-frequency transformer, a second full bridge and a secondary side support capacitor which are sequentially connected;
the two-phase parallel LLC resonant circuit comprises a first resonant cavity, a second resonant cavity, a first full-wave rectifying circuit, a second full-wave rectifying circuit and an output support capacitor.
2. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the first full bridge comprises
The first bridge arm comprises a drain electrode of a first power switch tube and a source electrode of a second power switch tube which are connected;
the second bridge arm comprises a drain electrode of a third power switch tube and a source electrode of a fourth power switch tube which are connected;
the first bridge arm, the second bridge arm and the primary side supporting capacitor are connected in parallel, a source electrode of the first power switch tube and a source electrode of the third power switch tube are connected with a positive electrode of the primary side supporting capacitor, a drain electrode of the second power switch tube and a drain electrode of the fourth switch tube are connected with a negative electrode of the primary side supporting capacitor, and a drain electrode of the first power switch tube is connected with the auxiliary inductor.
3. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the second full bridge comprises
The third bridge arm comprises a drain electrode of a fifth power switching tube and a source electrode of a sixth power switching tube which are connected;
the fourth bridge arm comprises a drain electrode of a seventh power switching tube and a source electrode of an eighth power switching tube which are connected;
the third bridge arm, the fourth bridge arm and the secondary side support capacitor are connected in parallel, a source electrode of the fifth power switch tube and a source electrode of the seventh power switch tube are connected with the positive electrode of the secondary side support capacitor, and a drain electrode of the sixth power switch tube and a drain electrode of the eighth power switch tube are connected with the negative electrode of the secondary side support capacitor.
4. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 2 or 3, wherein: the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube, the sixth power switch tube, the seventh power switch tube and the eighth power switch tube are all field effect transistors.
5. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the homonymous end of the primary winding of the high-frequency transformer is connected with the auxiliary inductor, the synonym end of the primary winding of the high-frequency transformer is connected with the negative electrode of the primary side supporting capacitor, the homonymous end of the secondary winding of the high-frequency transformer is connected with the drain electrode of the fifth power switch tube, and the synonym end of the secondary winding of the high-frequency transformer is connected with the negative electrode of the secondary side supporting capacitor.
6. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the first resonant cavity comprises a first resonant inductor L connected in seriesr1A first resonant capacitor Cr1And a first excitation inductance;
the second resonant cavity comprises a second resonant inductor L connected in seriesr2A second resonant capacitor Cr2And a second excitation inductance.
7. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the first full-wave rectification circuit comprises a first middle tap transformer, a first power diode and a second power diode;
same-name end of primary winding of first intermediate tap transformer and first resonant inductor Lr1Connected to a first resonant inductor Lr1The first power switch tube and the second power switch tube are connected; the first middle tap transformer primary winding different name end and the first resonance capacitor Cr1Connected by a first resonant capacitor Cr1Is connected with the negative electrode of the primary side support capacitor; the dotted terminal of the first secondary winding of the first middle tap transformer is connected with the anode of a first power switch diode; the second secondary winding different-name end of the first middle tap transformer is connected with the anode of the second power switch tube; the first middle tap transformer has a first secondary winding with different name end and a second secondary winding with the same name end connected with the positive pole of the output voltage stabilizing capacitor;
the second full-wave rectification circuit comprises a second middle tap transformer, a third power diode and a fourth power diode;
the dotted terminal of the primary winding of the second center-tapped transformer and the second resonant inductor Lr2Connected to a second resonant inductor Lr2The third power switch tube and the fourth power switch tube are connected; the synonym terminal of the primary winding of the second intermediate tap transformer and a second resonance capacitor Cr2Connected to a second resonant capacitor Cr2Is connected with the cathode of the secondary side support capacitor; the dotted terminal of the first secondary winding of the second middle tap transformer is connected with the anode of a third power switch diode; the second secondary winding synonym end of the second middle tap transformer is connected with the positive electrode of the fourth power switch tube; the first secondary winding transformer different-name end and the second secondary winding same-name end of the second middle tap transformer are connected with each other and connected with the positive electrode of the output voltage stabilizing capacitor;
the cathodes of the first power diode, the second power diode, the third power diode and the fourth power diode are connected with the anode of the output voltage stabilizing capacitor.
8. An isolated DC-DC converter integrating DAB and LLC resonant circuits according to claim 1, wherein: the full-bridge double-active DC-DC converter adopts phase shift control, and two parallel LLC adopts frequency conversion and fixed frequency control;
the DAB phase shift control comprises single phase shift control, double phase shift control, expansion phase shift control and triple phase shift control.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114157150A (en) * | 2021-10-27 | 2022-03-08 | 深圳市崧盛电子股份有限公司 | High-gain bidirectional Y source-LLC isolation direct current-direct current converter |
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| CN103916019A (en) * | 2014-04-22 | 2014-07-09 | 扬州大学 | Direct-current bus voltage buildup device based on double-active-bridge convertor and starting method thereof |
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| CN109256955A (en) * | 2018-11-14 | 2019-01-22 | 湖南大学 | The reflux power inhibition of double active active bridges based on mode parsing, analysis method |
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2021
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| CN103916019A (en) * | 2014-04-22 | 2014-07-09 | 扬州大学 | Direct-current bus voltage buildup device based on double-active-bridge convertor and starting method thereof |
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| CN108429466A (en) * | 2018-04-12 | 2018-08-21 | 浙江大学 | A kind of three road output DC-DC converter of isolation hybrid modulation based on three-phase LLC resonance circuits and phase whole-bridging circuit |
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