CN116614003A - Isolated bidirectional DC/DC conversion circuit - Google Patents
Isolated bidirectional DC/DC conversion circuit Download PDFInfo
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- CN116614003A CN116614003A CN202310889995.0A CN202310889995A CN116614003A CN 116614003 A CN116614003 A CN 116614003A CN 202310889995 A CN202310889995 A CN 202310889995A CN 116614003 A CN116614003 A CN 116614003A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 37
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 65
- 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 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 32
- 230000000295 complement effect Effects 0.000 description 12
- 238000004146 energy storage Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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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
- H02M3/01—Resonant DC/DC converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses an isolated bidirectional DC/DC conversion circuit, which comprises two transformers, an output rectifying circuit and a primary circuit corresponding to the transformers, wherein the primary circuit comprises a full-bridge inverter circuit and a primary resonance component; the input end of the full-bridge inverter circuit is connected with the DC input end of the DCDC, and the primary side resonance component is connected with the corresponding primary side winding of the transformer in series and then is connected with the two output ends of the full-bridge inverter circuit; the output rectifying circuit comprises three half-bridge circuits connected in parallel between the positive electrode and the negative electrode of the DCDC output end, the secondary winding of the first transformer is connected between the midpoint of the first half-bridge circuit and the midpoint of the second half-bridge circuit, and the secondary winding of the second transformer is connected between the midpoint of the first half-bridge circuit and the midpoint of the three half-bridge circuits. The three half-bridge circuits of the output rectifying circuit can be combined according to the requirement of output voltage when the utility model works, so as to realize wide-range voltage regulation.
Description
Technical Field
The present utility model relates to a DC/DC conversion circuit, and more particularly, to an isolated bidirectional DC/DC conversion circuit.
Background
A user-to-grid bi-directional transformation typically requires a relatively wide input range, whether for grid-to-user applications (e.g., charging of electric vehicles) or for energy storage units to the grid (e.g., energy storage substations). The typical electric vehicle charger is provided with two power conversion units, namely an AC/DC converter close to the power grid side and a DC/DC converter close to the user side; wherein the AC/DC converter can provide a stable and adjustable DC bus voltage under a wide range of grid voltages, and the DC/DC converter can provide a wide range of adjustable output voltages in constant current, constant voltage, trickle mode as required by the user for charging. The typical inverter also has two power conversion units, a DC/DC converter near the user side and a DC/AC converter near the grid side; the DC/AC converter converts the DC bus into AC power at different grid voltages or set voltages (e.g., off-grid), and the DC/DC converter can provide an adjustable, stable DC bus voltage at a wide range of user voltage inputs to accommodate varying grid voltages or set AC output voltages.
The utility model of application number 202221076050.4 discloses an alternating current/direct current conversion circuit of a charging pile, which comprises an alternating current/direct current (AC/DC) conversion circuit, a DC/DC converter and a BUCK converter, wherein the DC/DC converter comprises the DC/DC conversion circuit, and the BUCK converter comprises the BUCK conversion circuit; the direct current input end of the DC/DC converter is connected with the direct current output end of the AC/DC conversion circuit; the direct current input end of the BUCK converter is connected with the direct current output end of the DC/DC converter; the DC output end of the BUCK converter is an output end of an AC/DC conversion circuit. The alternating current/direct current conversion circuit of the charging pile is provided with the BUCK converter at the output end of the DC/DC converter, so that voltage output in a wide range can be realized, but the voltage regulation range of the DC/DC converter is smaller.
Disclosure of Invention
The utility model aims to provide an isolated bidirectional DC/DC conversion circuit capable of realizing wide-range voltage regulation.
In order to solve the technical problem, the utility model adopts the technical scheme that the isolated bidirectional DC/DC conversion circuit comprises a DCDC direct current input end, a DCDC direct current output end, two transformers, an output rectifying circuit and a primary circuit corresponding to the transformers, wherein the primary circuit comprises a switching tube full-bridge inverter circuit and a primary resonance component; the two input ends of the switching tube full-bridge inverter circuit are respectively connected with the positive electrode and the negative electrode of the DCDC input end, and the primary side resonance component is connected with the corresponding primary side winding of the transformer in series and then connected with the two output ends of the switching tube full-bridge inverter circuit; the output rectifying circuit comprises three switching tube half-bridge circuits, and two ends of the three switching tube half-bridge circuits are connected in parallel between the positive pole and the negative pole of the DCDC output end; the first end of the secondary winding of the first transformer is connected with the midpoint of the second switching tube half-bridge circuit, and the second end of the secondary winding of the first transformer is connected with the midpoint of the first switching tube half-bridge circuit; the first end of the secondary winding of the second transformer is connected with the midpoint of the first switching tube half-bridge circuit, and the second end of the secondary winding of the second transformer is connected with the midpoint of the third switching tube half-bridge circuit.
The isolated bidirectional DC/DC conversion circuit comprises a switching tube and a power supply, wherein the switching tube comprises a body diode or is connected with a diode in parallel.
The isolated bidirectional DC/DC conversion circuit comprises a primary side resonance component, a transformer primary side winding and a switching tube full-bridge inverter circuit, wherein the primary side resonance component comprises a resonance capacitor and a resonance inductor, the first end of the transformer primary side winding is connected with the midpoint of a first half-bridge of the switching tube full-bridge inverter circuit through the resonance capacitor, and the second end of the transformer primary side winding is connected with the midpoint of a second half-bridge of the switching tube full-bridge inverter circuit through the resonance inductor.
The isolated bidirectional DC/DC conversion circuit comprises a first secondary side resonance component and a second secondary side resonance component, wherein a secondary side winding of a first transformer is connected with the first secondary side resonance component in series and then is respectively connected with a midpoint of the first switching tube half-bridge circuit and a midpoint of the second switching tube half-bridge circuit, and a secondary side winding of the second transformer is connected with the second secondary side resonance component in series and then is respectively connected with a midpoint of the first switching tube half-bridge circuit and a midpoint of the third switching tube half-bridge circuit.
The isolated bidirectional DC/DC conversion circuit comprises a first secondary side resonance component, a second secondary side resonance component and a first output circuit, wherein the first secondary side resonance component comprises a first resonance capacitor and a first resonance inductor; the first end of the secondary winding of the first transformer is connected with the midpoint of the half-bridge circuit of the second switching tube through a first resonant capacitor, and the second end of the secondary winding of the first transformer is connected with the midpoint of the half-bridge circuit of the first switching tube through a first resonant inductor; the first end of the secondary winding of the second transformer is connected with the midpoint of the half-bridge circuit of the first switching tube through the second resonant capacitor, and the second end of the secondary winding of the second transformer is connected with the midpoint of the half-bridge circuit of the third switching tube through the second resonant inductor.
In the isolated bidirectional DC/DC conversion circuit, the first end of the primary winding of the transformer is the same-name end, the first end of the secondary winding of the first transformer is the same-name end, and the first end of the secondary winding of the second transformer is the same-name end.
The isolated bidirectional DC/DC conversion circuit comprises an input capacitor, an input resistor, an output capacitor and an output resistor, wherein the input capacitor is connected in series with the input resistor and then connected between the positive electrode and the negative electrode of the DC input end, and the output capacitor is connected in series with the output resistor and then connected between the positive electrode and the negative electrode of the DC output end.
When the isolated bidirectional DC/DC conversion circuit outputs low voltage of the rectification circuit, the first switching tube half-bridge circuit and the second switching tube half-bridge circuit form a first controllable full-bridge rectification circuit, and the first switching tube half-bridge circuit and the third switching tube half-bridge circuit form a second controllable full-bridge rectification circuit; the output of the first controllable full-bridge rectifying circuit is connected in parallel with the output of the second controllable full-bridge rectifying circuit.
In the isolated bidirectional DC/DC conversion circuit, when the high voltage output of the rectification circuit is output, the first switching tube half-bridge circuit is closed, and the secondary winding of the first transformer is connected with the secondary winding of the second transformer in series through the midpoint of the first switching tube half-bridge circuit; the second switching tube half-bridge circuit and the third switching tube half-bridge circuit form a controllable full-bridge rectifying circuit.
The three half-bridge circuits of the isolated bidirectional DC/DC conversion circuit can be combined into two controllable full-bridge rectification circuits which are respectively connected with secondary windings of two transformers in parallel according to the requirement of output voltage so as to output lower voltage; or the two series-connected secondary windings of the transformers are combined into a controllable full-bridge rectifying circuit which outputs higher voltage to realize wide-range voltage regulation.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a circuit diagram of an isolated bidirectional DC/DC conversion circuit according to an embodiment of the present utility model.
Detailed Description
The structure and principle of the isolated bidirectional DC/DC conversion circuit in the embodiment of the utility model are shown in figure 1, and the isolated bidirectional DC/DC conversion circuit comprises a DCDC direct current input end, a DCDC direct current output end, two transformers L1 and L4, an output rectifying circuit, a primary side circuit corresponding to the transformers L1 and L4 and a control circuit.
The first primary circuit comprises a first switching tube full-bridge inverter circuit formed by MOS tubes T1, T2, T6 and T7 and a primary resonance component formed by a resonance capacitor C1 and a resonance inductor L2. The two input ends of the first switching tube full-bridge inverter circuit are respectively connected with the positive pole VIN+ and the negative pole VIN-of the DCDC input end, and after the resonance capacitor C1 and the resonance inductor L2 are connected with the primary winding of the transformer L1 in series, the two output ends of the first switching tube full-bridge inverter circuit are connected, namely the midpoints of two half bridges of the first switching tube full-bridge inverter circuit. Namely, a first end of a primary winding of the transformer L1 is connected with a midpoint of a first half-bridge of the full-bridge inverter circuit of the first switching tube through a resonant capacitor C1, and a second end of the primary winding of the transformer L1 is connected with a midpoint of a second half-bridge of the full-bridge inverter circuit of the first switching tube through a resonant inductor L2.
The input capacitor C5 is connected in series with the input resistor R1 and then connected between the positive pole VIN+ and the negative pole VIN-of the DC input end, and the output capacitor C6 is connected in series with the output resistor R2 and then connected between the positive pole VOUT+ and the negative pole VOUT-of the DC output end.
The second primary side circuit comprises a second switching tube full-bridge inverter circuit formed by MOS tubes T8, T9, 10 and T11 and a primary side resonance component formed by a resonance capacitor C3 and a resonance inductor L5. The two input ends of the second switching tube full-bridge inverter circuit are respectively connected with the positive pole VIN+ and the negative pole VIN-of the DCDC input end, and after the resonance capacitor C3 and the resonance inductor L5 are connected with the primary winding of the transformer L4 in series, the two output ends of the second switching tube full-bridge inverter circuit are connected, namely the midpoints of two half bridges of the second switching tube full-bridge inverter circuit. Namely, the first end of the primary winding of the transformer L4 is connected with the midpoint of the first half-bridge of the full-bridge inverter circuit of the second switching tube through a resonant capacitor C3, and the second end of the primary winding of the transformer L4 is connected with the midpoint of the second half-bridge of the full-bridge inverter circuit of the second switching tube through a resonant inductor L5.
The output rectifying circuit comprises three switching tube half-bridge circuits consisting of MOS tubes T3, T4, T5, T12, T13 and T14, wherein the MOS tubes T3 and T12 form a first switching tube half-bridge circuit, the MOS tubes T4 and T13 form a second switching tube half-bridge circuit, and the MOS tubes T5 and T14 form a third switching tube half-bridge circuit.
Two ends of the three switching tube half-bridge circuits are connected in parallel between the positive pole VOUT+ and the negative pole VOUT-of the DCDC output end. The first end of the secondary winding of the first transformer L1 is connected with the midpoint of the second switching tube half-bridge circuit, the second end of the secondary winding of the first transformer L1 is connected with the midpoint of the first switching tube half-bridge circuit, and the first switching tube half-bridge circuit and the second switching tube half-bridge circuit form a first controllable full-bridge rectifying circuit. The first end of the secondary winding of the second transformer L4 is connected with the midpoint of the first switching tube half-bridge circuit, the second end of the secondary winding of the second transformer L4 is connected with the midpoint of the third switching tube half-bridge circuit, and the first switching tube half-bridge circuit and the third switching tube half-bridge circuit form a second controllable full-bridge rectifying circuit.
The output rectifying circuit further comprises a first secondary side resonance component and a second secondary side resonance component, wherein the first secondary side resonance component comprises a first resonance capacitor C2 and a first resonance inductor L3, and the second secondary side resonance component comprises a second resonance capacitor C4 and a second resonance inductor L6. The first end of the secondary winding of the first transformer L1 is connected with the midpoint of the second switching tube half-bridge circuit through a first resonant capacitor C2, and the second end of the secondary winding of the first transformer L1 is connected with the midpoint of the first switching tube half-bridge circuit through a first resonant inductor L3. The first end of the secondary winding of the second transformer L4 is connected with the midpoint of the first switching tube half-bridge circuit through a second resonant capacitor C4, and the second end of the secondary winding of the second transformer L4 is connected with the midpoint of the third switching tube half-bridge circuit through a second resonant inductor L6.
The first ends of primary windings of the transformers L1 and L4 are homonymous ends, the first ends of secondary windings of the first transformer L1 are homonymous ends, and the first ends of secondary windings of the second transformer L4 are homonymous ends.
The MOS transistors T1 to T14 include body diodes, and if the output rectifying circuit and the switching tube full-bridge inverter circuit employ switching tubes that do not include body diodes, the switching tubes need to be connected in parallel with diodes. The parallel diode is oriented such that the negative pole of the grid-side or user-side voltage is directed toward the positive pole of the voltage.
The isolated bidirectional DC/DC conversion circuit of the above embodiment of the utility model comprises 7 half-bridge circuits, wherein the 7 half-bridge circuits are composed of switching tubes T1 to T14, the switching signals of the switching tubes T1 and T6 are complementary, the switching signals of the switching tubes T2 and T7 are complementary, the switching signals of the switching tubes T3 and T12 are complementary, the switching signals of the switching tubes T4 and T13 are complementary, the switching signals of the switching tubes T5 and T14 are complementary, the switching signals of the switching tubes T8 and T10 are complementary, and the switching signals of the switching tubes T9 and T11 are complementary. In practice, the half-bridge circuit inserts a short dead time between each pair of complementary switching signals to avoid phase pin through. In the present embodiment, the control circuit generates the 1 st to 14 th switching signals according to the selected modulation scheme based on the output voltage or current. The number of switching tubes is 14 in the example, and is reduced by 6 compared with the utility model with the application number of 202221076050.4.
The control method for the series connection or parallel connection of the secondary windings of the two transformers comprises the following steps:
(a) When the voltage at the user side is less than 500V, the controller generates a control signal to control the secondary windings of the two transformers to be opposite in phase, and the secondary windings of the two transformers are equivalently connected in parallel. The control signals of the switching tube T1, the switching tube T7, the switching tube T9 and the switching tube T10 are the same, the signals of the switching tube T2, the switching tube T6, the switching tube T8 and the switching tube T11 are the same, and the control signals of the switching tube T1 and the switching tube T2 are complementary; the signals of the switching tube T4, the switching tube T5 and the switching tube T12 are the same, the control signals of the switching tube T3, the switching tube T13 and the switching tube T14 are the same, and the signals of the switching tube T4, the switching tube T5 and the switching tube T12 are complementary. The first switching tube half-bridge circuit and the second switching tube half-bridge circuit form a first controllable full-bridge rectifying circuit, and the first switching tube half-bridge circuit and the third switching tube half-bridge circuit form a second controllable full-bridge rectifying circuit. The first controllable full-bridge rectifying circuit is connected with the output of the second controllable full-bridge rectifying circuit in parallel.
(b) When the voltage at the user side is greater than 500V, the controller generates a control signal to control the secondary windings of the two transformers to have the same phase, and the secondary windings of the two transformers are equivalently connected in series. The control signals of the switching tube T1, the switching tube T7, the switching tube T8 and the switching tube T11 are the same; the control signals of the switching tube T2, the switching tube T6, the switching tube T9 and the switching tube T10 are the same and are complementary with the control signals of the switching tube T1, the switching tube T7, the switching tube T8 and the switching tube T11. The control signals of the switching tube T4 and the switching tube T14 are the same, the control signals of the switching tube T5 and the switching tube T13 are the same, the control signals of the switching tube T4 and the switching tube T14 are complementary, and the control signals of the switching tube T3 and the switching tube T12 are the same and are switch-off signals. At this time, the first switching tube half-bridge circuit is closed, the second switching tube half-bridge circuit and the third switching tube half-bridge circuit form a controllable full-bridge rectifying circuit, and the input of the controllable full-bridge rectifying circuit is two transformer secondary windings connected in series.
(c) When the series connection is switched into parallel connection or the parallel connection is switched into series connection, the current stored by the inductor or the voltage stored by the capacitor cannot be suddenly changed due to the existence of the internal parasitic diode of the switching tube or the external parallel diode, and natural commutation of the current is provided.
The isolated bidirectional DC/DC conversion circuit of the embodiment of the utility model can have a wide-range adjustable output voltage of bidirectional conversion, and meanwhile, the number of switching tubes is small, and the circuit can be switched with load. The above embodiments of the present utility model can use modulation mode control and switching frequency control simultaneously. During operation, the modulation scheme may be selected based on one or more control signals provided by the controller or at an external command. The switching frequency of the switching tube may be determined under closed-loop control of the modulated output voltage or, for example, under closed-loop control of the modulated output current. According to the selected modulation mode and the switching frequency of the device, the controller generates a control signal to drive the isolated bidirectional DC/DC conversion circuit to work.
Claims (9)
1. An isolated bidirectional DC/DC conversion circuit comprises a DCDC direct current input end, a DCDC direct current output end, two transformers, an output rectifying circuit and a primary circuit corresponding to the transformers, wherein the primary circuit comprises a switching tube full-bridge inverter circuit and a primary resonance component; the two input ends of the switching tube full-bridge inverter circuit are respectively connected with the positive electrode and the negative electrode of the DCDC input end, and the primary side resonance component is connected with the corresponding primary side winding of the transformer in series and then connected with the two output ends of the switching tube full-bridge inverter circuit; the output rectifying circuit is characterized by comprising three switching tube half-bridge circuits, wherein two ends of the three switching tube half-bridge circuits are connected in parallel between the positive pole and the negative pole of the DCDC direct-current output end; the first end of the secondary winding of the first transformer is connected with the midpoint of the second switching tube half-bridge circuit, and the second end of the secondary winding of the first transformer is connected with the midpoint of the first switching tube half-bridge circuit; the first end of the secondary winding of the second transformer is connected with the midpoint of the first switching tube half-bridge circuit, and the second end of the secondary winding of the second transformer is connected with the midpoint of the third switching tube half-bridge circuit.
2. The isolated bidirectional DC/DC conversion circuit of claim 1, wherein the switching tube comprises a body diode or a diode connected in parallel.
3. The isolated bidirectional DC/DC conversion circuit of claim 1, wherein the primary resonant assembly comprises a resonant capacitor and a resonant inductor, a first end of the primary winding of the transformer is connected to a midpoint of a first half-bridge of the switching tube full-bridge inverter circuit through the resonant capacitor, and a second end of the primary winding of the transformer is connected to a midpoint of a second half-bridge of the switching tube full-bridge inverter circuit through the resonant inductor.
4. The isolated bidirectional DC/DC converter circuit of claim 3, wherein the output rectifier circuit comprises a first secondary resonant assembly and a second secondary resonant assembly, the first transformer secondary winding is connected in series with the first secondary resonant assembly and then connected to a midpoint of the first switching tube half-bridge circuit and a midpoint of the second switching tube half-bridge circuit, respectively, and the second transformer secondary winding is connected in series with the second secondary resonant assembly and then connected to a midpoint of the first switching tube half-bridge circuit and a midpoint of the third switching tube half-bridge circuit, respectively.
5. The isolated bi-directional DC/DC conversion circuit of claim 4, wherein the first secondary resonant assembly comprises a first resonant capacitor and a first resonant inductor, and the second secondary resonant assembly comprises a second resonant capacitor and a second resonant inductor; the first end of the secondary winding of the first transformer is connected with the midpoint of the half-bridge circuit of the second switching tube through a first resonant capacitor, and the second end of the secondary winding of the first transformer is connected with the midpoint of the half-bridge circuit of the first switching tube through a first resonant inductor; the first end of the secondary winding of the second transformer is connected with the midpoint of the half-bridge circuit of the first switching tube through the second resonant capacitor, and the second end of the secondary winding of the second transformer is connected with the midpoint of the half-bridge circuit of the third switching tube through the second resonant inductor.
6. The isolated bi-directional DC/DC converter circuit of claim 5 wherein the first end of the primary winding of the transformer is a homonymous end, the first end of the secondary winding of the first transformer is a homonymous end, and the first end of the secondary winding of the second transformer is a homonymous end.
7. The isolated bidirectional DC/DC conversion circuit of claim 1, comprising an input capacitor, an input resistor, an output capacitor, and an output resistor, wherein the input capacitor is connected in series with the input resistor and then connected between the positive and negative poles of the DC input terminal of the DCDC, and the output capacitor is connected in series with the output resistor and then connected between the positive and negative poles of the DC output terminal of the DCDC.
8. The isolated bidirectional DC/DC converter circuit of claim 1, wherein the first switching tube half-bridge circuit and the second switching tube half-bridge circuit form a first controllable full-bridge rectifier circuit, and the first switching tube half-bridge circuit and the third switching tube half-bridge circuit form a second controllable full-bridge rectifier circuit when the output rectifier circuit outputs a low voltage; the output of the first controllable full-bridge rectifying circuit is connected in parallel with the output of the second controllable full-bridge rectifying circuit.
9. The isolated bidirectional DC/DC converter circuit of claim 1, wherein the first switching tube half-bridge circuit is turned off when the high voltage output of the rectifier circuit is output, and the secondary winding of the first transformer is connected in series with the secondary winding of the second transformer through a midpoint of the first switching tube half-bridge circuit; the second switching tube half-bridge circuit and the third switching tube half-bridge circuit form a controllable full-bridge rectifying circuit.
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| CN202310889995.0A CN116614003B (en) | 2023-07-20 | 2023-07-20 | Isolated bidirectional DC/DC conversion circuit |
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| CN202310889995.0A CN116614003B (en) | 2023-07-20 | 2023-07-20 | Isolated bidirectional DC/DC conversion circuit |
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| CN116614003B CN116614003B (en) | 2024-03-15 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080192510A1 (en) * | 2007-02-08 | 2008-08-14 | Sma Technologie Ag | Device for feeding electrical energy from an anergy source |
| JP2011130577A (en) * | 2009-12-17 | 2011-06-30 | Shihen Tech Corp | Dc power supply unit |
| CN102361403A (en) * | 2011-06-13 | 2012-02-22 | 珠海泰坦新能源系统有限公司 | Staggered series direct current (DC)/DC converter circuit |
| CN106655793A (en) * | 2017-02-07 | 2017-05-10 | 南京航空航天大学 | Common resonant inductor type wide-input-range LLC resonant converter |
| CN107733236A (en) * | 2017-10-27 | 2018-02-23 | 深圳市保益新能电气有限公司 | A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method |
| CN109861543A (en) * | 2019-01-28 | 2019-06-07 | 浙江大学 | A kind of wide crisscross parallel type LCLC controlled resonant converter for loading wide gain |
| CN111064370A (en) * | 2019-12-26 | 2020-04-24 | 南京工程学院 | LLC and DAB mixed bidirectional DC-DC converter |
| CN112366950A (en) * | 2020-11-02 | 2021-02-12 | 湖南大学 | Electrodeless control series/parallel bidirectional power circuit and control method thereof |
-
2023
- 2023-07-20 CN CN202310889995.0A patent/CN116614003B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080192510A1 (en) * | 2007-02-08 | 2008-08-14 | Sma Technologie Ag | Device for feeding electrical energy from an anergy source |
| JP2011130577A (en) * | 2009-12-17 | 2011-06-30 | Shihen Tech Corp | Dc power supply unit |
| CN102361403A (en) * | 2011-06-13 | 2012-02-22 | 珠海泰坦新能源系统有限公司 | Staggered series direct current (DC)/DC converter circuit |
| CN106655793A (en) * | 2017-02-07 | 2017-05-10 | 南京航空航天大学 | Common resonant inductor type wide-input-range LLC resonant converter |
| CN107733236A (en) * | 2017-10-27 | 2018-02-23 | 深圳市保益新能电气有限公司 | A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method |
| CN109861543A (en) * | 2019-01-28 | 2019-06-07 | 浙江大学 | A kind of wide crisscross parallel type LCLC controlled resonant converter for loading wide gain |
| CN111064370A (en) * | 2019-12-26 | 2020-04-24 | 南京工程学院 | LLC and DAB mixed bidirectional DC-DC converter |
| CN112366950A (en) * | 2020-11-02 | 2021-02-12 | 湖南大学 | Electrodeless control series/parallel bidirectional power circuit and control method thereof |
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