CN114884366A - High-frequency isolation bidirectional converter - Google Patents
High-frequency isolation bidirectional converter Download PDFInfo
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- CN114884366A CN114884366A CN202210544039.4A CN202210544039A CN114884366A CN 114884366 A CN114884366 A CN 114884366A CN 202210544039 A CN202210544039 A CN 202210544039A CN 114884366 A CN114884366 A CN 114884366A
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- inductor
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- bidirectional converter
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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
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a high-frequency isolation bidirectional converter, which comprises a switch circuit, a resonance circuit, a transformer and a full-bridge switch circuit, wherein one side of the full-bridge switch circuit and one side of the switch circuit are respectively used as a second external side and a first external side of the high-frequency isolation bidirectional converter, the resonance circuit comprises a first inductor, a second inductor, a first capacitor, a second capacitor and a selection switch, one end of the second capacitor is connected with one end of the first capacitor and one end of the second inductor, one end of the second inductor is also connected with the other end of the first capacitor/the second capacitor through the selection switch, the other end of the second capacitor is also connected with one end of the first inductor, the other ends of the first capacitor and the second inductor are connected with the switch circuit, the other end of the second inductor and the other end of the first inductor are connected with a primary winding of the transformer, and the secondary winding of the transformer is connected with the middle point of a bridge arm of the full-bridge switching circuit.
Description
Technical Field
The invention relates to the technical field of power conversion, in particular to a high-frequency isolation bidirectional converter.
Background
The bidirectional DC-DC converter is a DC/DC converter capable of adjusting energy bidirectional transmission according to requirements, and is mainly applied to occasions such as an energy storage system, a vehicle-mounted power supply system, a feedback charging and discharging system, a hybrid energy electric vehicle and the like.
In a traditional LLC resonant bidirectional converter, ZVS (zero voltage switching) conduction of a switching tube on a primary side and ZCS (zero voltage switching) switching-off of a switching tube on a rectifying side can be realized no matter in forward and reverse work, but when energy flows reversely, the circuit characteristic is not the LLC resonant characteristic any more and is degraded into the LC resonant characteristic, the maximum voltage gain of LC resonance is changed into 1, the voltage gain in reverse work is greatly reduced, the working voltage range is greatly narrowed, and therefore the LLC resonant bidirectional converter is not suitable for working in a wide voltage range energy bidirectional flow state, and the application scene of the LLC resonant bidirectional converter is limited.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-frequency isolation bidirectional converter which has no loss of gain in forward and reverse working and can improve the working voltage range.
In order to solve the above technical problem, the present invention provides a high frequency isolated bidirectional converter, comprising a switch circuit, a resonant circuit, a transformer and a full bridge switch circuit, wherein one side of the full bridge switch circuit and one side of the switch circuit are respectively used as a second external side and a first external side of the high frequency isolated bidirectional converter, the resonant circuit comprises a first inductor, a second inductor, a first capacitor, a second capacitor and a selection switch, one end of the second capacitor is connected to one end of the first capacitor and one end of the second inductor, the one end of the second inductor is further connected to the other end of the first capacitor/the second capacitor through the selection switch, so as to be connected to the first capacitor through the selection switch when the high frequency isolated bidirectional converter works in a first state, and connected to the second capacitor through the selection switch when the high frequency isolated bidirectional converter works in a second state, the other end of the second capacitor is further connected to one end of the first inductor, and the other ends of the first capacitor and the second inductor are connected with a switch circuit, the other ends of the second inductor and the first inductor are connected with a primary winding of a transformer, and a secondary winding of the transformer is connected with the middle point of a bridge arm of a full-bridge switch circuit, wherein in the first state, the power is transmitted from the first external side to the second external side, and in the second state, the power is transmitted from the second external side to the first external side.
The further technical scheme is as follows: the switching circuit comprises two switching tubes which are connected in series to form a bridge arm, two ends of the bridge arm are used as first external sides of the high-frequency isolation bidirectional converter, and the first capacitor and the second inductor are respectively connected to the middle point and the lowest end of the bridge arm of the switching circuit.
The further technical scheme is as follows: the switching circuit comprises two switching tubes which are connected in series to form a bridge arm, two ends of the bridge arm are used as first external sides of the high-frequency isolation bidirectional converter, and the first capacitor and the second inductor are respectively connected to the uppermost end and the middle point of the bridge arm of the switching circuit.
The further technical scheme is as follows: the switching circuit comprises four switching tubes, every two switching tubes are connected in series to form a bridge arm, two ends of the two bridge arms are used as first external sides of the high-frequency isolation bidirectional converter after the two bridge arms are connected in parallel, and the first capacitor and the second inductor are respectively connected to the middle points of the two bridge arms of the switching circuit.
The further technical scheme is as follows: the full-bridge switching circuit comprises four switching tubes, every two switching tubes are connected in series to form a bridge arm, two ends of the two bridge arms are used as second external connection sides of the high-frequency isolation bidirectional converter after the two bridge arms are connected in parallel, and the homonymous end and the heteronymous end of the secondary winding of the transformer are respectively connected to the middle points of the two bridge arms.
The further technical scheme is as follows: the high-frequency isolation bidirectional converter further comprises a first filter capacitor and a second filter capacitor, wherein two ends of the first filter capacitor are connected to a first external side of the high-frequency isolation bidirectional converter, and two ends of the second filter capacitor are connected to a second external side.
In order to solve the above technical problem, the present invention further provides a high frequency isolated bidirectional converter, which includes a switch circuit, a resonant circuit, a transformer, and a full bridge switch circuit, wherein one side of the full bridge switch circuit and one side of the switch circuit are respectively used as a second external side and a first external side of the high frequency isolated bidirectional converter, the resonant circuit includes a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, and a selector switch, two ends of the second capacitor are respectively connected to one end of the third inductor and one end of the first inductor, the other end of the third inductor is connected to one end of the first capacitor, one end of the second inductor is connected between the third inductor and the second capacitor, and the one end of the second inductor is further connected to the other end of the first capacitor/the first inductor through the selector switch so as to be connected to the first capacitor through the selector switch when the high frequency isolated bidirectional converter operates in a first state, the power supply circuit comprises a first inductor, a second inductor, a switch circuit, a transformer and a full-bridge switch circuit, wherein the first inductor is connected with the other end of the first capacitor through a selection switch in a second state, the other end of the first capacitor and the other end of the second inductor are connected with the primary winding of the transformer, the secondary winding of the transformer is connected with the middle point of a bridge arm of the full-bridge switch circuit, the power is transmitted from the first external side to the second external side in the first state, and the power is transmitted from the second external side to the first external side in the second state.
Compared with the prior art, the equivalent circuit of the resonant circuit in the high-frequency isolation bidirectional converter is the same when the energy flows in the forward and reverse directions, and the gain is not lost when the resonant circuit works in the forward and reverse directions, so that the problem that the traditional LLC resonant circuit cannot work in the same performance in the reverse direction is solved.
Drawings
Fig. 1 is a circuit schematic diagram of a first embodiment of the high frequency isolated bidirectional converter of the present invention.
Fig. 2 is a circuit schematic diagram of a second embodiment of the high frequency isolated bidirectional converter of the present invention.
Fig. 3 is a circuit schematic diagram of a third embodiment of the high frequency isolated bidirectional converter of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a circuit diagram of a first embodiment of a high frequency isolated bidirectional converter 10 according to the present invention. In the embodiment shown in the drawings, the high frequency isolated bidirectional converter 10 includes a switch circuit 11, a resonant circuit 12, a transformer T1, and a full bridge switch circuit 14, one side of the full bridge switch circuit 14 and the switch circuit 11 respectively serves as a second external side and a first external side of the high frequency isolated bidirectional converter 10 to connect a load and a power source, wherein the resonant circuit 12 includes a first capacitor C1, a second capacitor C2, a first inductor L1, a second inductor L2, and a selection switch S, one end of the second capacitor C2 is connected to one ends of the first capacitor C1 and the second inductor L2, the one end of the second inductor L2 is further connected to the other end of the first capacitor C1/the second capacitor C2 through the selection switch S to connect to the other end of the first capacitor C1 through the selection switch S when the high frequency isolated bidirectional converter 10 operates in the first state, and connect to the other end of the second capacitor C2 through the selection switch S when the second state, the other end of the second capacitor C2 is further connected to one end of a first inductor L1, the other ends of the first capacitor C1 and the second inductor L2 are connected to the switch circuit 11, the other end of the second inductor L2 and the other end of the first inductor L1 are connected to the primary winding of the transformer T1, and the secondary winding of the transformer T1 is connected to the midpoint of the bridge arm of the full-bridge switch circuit 14, wherein in the first state, power is transmitted from the first external side to the second external side, and in the second state, power is transmitted from the second external side to the first external side, that is, the operating state of the high-frequency isolated bidirectional converter 10 is the first state when energy flows in the forward direction, and the operating state of the high-frequency isolated bidirectional converter 10 is the second state when energy flows in the reverse direction. Preferably, the inductance of the first inductor L1 and the inductance of the second inductor L2 are the same.
In this embodiment, when energy flows in the forward direction, that is, when power is transmitted from the first external side to the second external side, the first external side of the high-frequency isolated bidirectional converter 10 serves as a dc input terminal to which a power supply can be connected, and the second external side thereof serves as a dc output terminal to which a load can be connected; and when the energy flows in the reverse direction, that is, when the electric power is transmitted from the second external side to the first external side, the second external side of the high-frequency isolated bidirectional converter 10 serves as a dc input terminal, and the first external side thereof serves as a dc output terminal. When energy flows forwards, the first capacitor C1 is in short circuit, and when energy flows backwards, the second capacitor C2 is in short circuit, so that the equivalent circuit of the resonant circuit 12 when the energy flows forwards and backwards is the same, no gain is lost when the resonant circuit works forwards and backwards, the problem that the traditional LLC resonant circuit cannot work with the same performance in the reverse direction is solved, namely, the voltage can be increased when the energy flows backwards, the input and output voltage range of the converter can be effectively increased, wide voltage range conversion is realized, and the high-power bidirectional isolating converter is suitable for high-power circuits.
In some embodiments, the switch circuit 11 is a full-bridge structure, and includes four switch tubes, namely a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4, where each two switch tubes are connected in series to form a bridge arm, and after the two bridge arms are connected in parallel, two ends of each bridge arm are used as a first external side of the high-frequency isolated bidirectional converter 10, where a midpoint of a bridge arm formed by connecting the first switch tube Q1 and the second switch tube Q2 in series is connected to a first capacitor C1, and a midpoint of a bridge arm formed by connecting the third switch tube Q3 and the fourth switch tube Q4 in series is connected to a second inductor L2.
In the embodiment shown in the drawings, the full-bridge switching circuit 14 includes four switching tubes, namely a fifth switching tube Q5, a sixth switching tube Q6, a seventh switching tube Q7 and an eighth switching tube Q8, each two switching tubes are connected in series to form a bridge arm, and after the two bridge arms are connected in parallel, two ends of each bridge arm are used as the second external connection side of the high-frequency isolated bidirectional converter 10, wherein a midpoint of a bridge arm formed by connecting the fifth switching tube Q5 and the sixth switching tube Q6 in series and a midpoint of a bridge arm formed by connecting the seventh switching tube Q7 and the eighth switching tube Q8 in series are respectively connected with a dotted end and a dotted end of the secondary winding of the transformer T1. Based on the design, when energy flows in the forward direction, the full-bridge switching circuit 14 can rectify the voltage waveform periodically output by the transformer T1 to generate the working voltage required by the load. Preferably, the switch tube is MOS, IGBT or other controllable power switch tube to achieve better circuit performance, and in some embodiments, a diode may be connected in parallel to each switch tube, and if the switch tube is MOS, a diode is connected in parallel between the drain and the source, and if the switch tube is IGBT, a diode is connected in parallel between the emitter and the collector.
Further, the high-frequency isolated bidirectional converter 10 further includes a first filter capacitor C3 and a second filter capacitor C4, two ends of the first filter capacitor C3 are connected to the first external side of the high-frequency isolated bidirectional converter 10, and two ends of the second filter capacitor C4 are connected to the second external side of the high-frequency isolated bidirectional converter 10.
In this embodiment, when energy is transmitted in the forward direction, the wide-range voltage output of the high-frequency isolated bidirectional converter 10 is realized by controlling the switching frequencies of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4, and the two switching tubes on each bridge arm are complementarily conducted, so that the soft switching of the circuit can be realized; when energy is transmitted reversely, the equivalent circuit of the resonant circuit 12 is the same as that when energy is transmitted in the forward direction, so that the same wide-range voltage transformation as that during forward transmission can be realized by controlling the switching frequencies of the fifth switching tube Q5, the sixth switching tube Q6, the seventh switching tube Q7 and the eighth switching tube Q8, and the two switching tubes on each bridge arm are complementarily conducted, so that the soft switching of the circuit can be realized.
Referring to fig. 2, fig. 2 is a circuit diagram of a high frequency isolated bidirectional converter 10 according to a second embodiment of the present invention, which is different from the first embodiment in that the specific structure of the switch circuit 11 is different, and the rest of the circuit structures are the same or similar. In this embodiment, the switch circuit 11 includes two switch tubes, namely a first switch tube Q1 and a second switch tube Q2, the first switch tube Q1 and the second switch tube Q2 are connected in series to form a bridge arm, two ends of the bridge arm are used as the first external side of the high-frequency isolated bidirectional converter 10, the first capacitor C1 is connected to a midpoint of the bridge arm, and the second inductor L2 is connected to a lowest end of the bridge arm. Understandably, in some other embodiments, the first capacitor C1 may be connected to the uppermost end of the bridge arm, and the second inductor L2 may be connected to the middle point of the bridge arm, and the operation process and the operation principle of the circuit are similar to those of this embodiment, and the wide voltage range conversion can also be realized.
Referring to fig. 3, fig. 3 is a circuit diagram of a third embodiment of the high-frequency isolated bidirectional converter 10 of the present invention, which is different from the first embodiment in that the specific structure of the resonant circuit 12 is different, and the rest of the circuit structures are the same or similar. In this embodiment, the resonant circuit 12 includes a first inductor L1, a second inductor L2, a third inductor L3, a first capacitor C1, a second capacitor C2, and a selection switch S, two ends of the second capacitor C2 are respectively connected to one end of the third inductor L3 and one end of the first inductor L1, the other end of the third inductor L3 is connected to one end of the first capacitor C1, one end of the second inductor L2 is connected between the third inductor L3 and the second capacitor C2, the one end of the second inductor L2 is further connected to the other end of the first capacitor C1/the first inductor L1 through the selection switch S, so as to be connected to the other end of the first capacitor C1 through the selection switch S when the high-frequency bidirectional isolation converter 10 operates in the first state, and connected to the other end of the first inductor L1 through the selection switch S when the second state, the other end of the first capacitor C1 and the other end of the second inductor L2 are connected to the switch circuit 11, the other end of the second inductor L2 and the other end of the first inductor L1 are connected to the primary winding of the transformer T1. It can be seen that the resonant circuit 12 in this embodiment is a five-component resonant circuit, the equivalent circuits are the same when energy flows in the forward and reverse directions, no loss is generated in the gain during the forward and reverse operations, and the input and output voltage range of the high-frequency isolated bidirectional converter 10 can be effectively increased to realize wide voltage range conversion.
In conclusion, equivalent circuits of the resonant circuit in the high-frequency isolation bidirectional converter are the same when energy flows in the forward direction and the reverse direction, no loss exists in gains when the resonant circuit works in the forward direction and the reverse direction, and the problem that the traditional LLC resonant circuit cannot work in the same performance in the reverse direction is solved.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (7)
1. A high frequency isolated bidirectional converter, characterized by: the high-frequency isolation bidirectional converter comprises a switch circuit, a resonance circuit, a transformer and a full-bridge switch circuit, wherein one side of the full-bridge switch circuit and one side of the switch circuit are respectively used as a second external side and a first external side of the high-frequency isolation bidirectional converter, the resonance circuit comprises a first inductor, a second inductor, a first capacitor, a second capacitor and a selector switch, one end of the second capacitor is connected with one end of the first capacitor and one end of the second inductor, the other end of the second inductor is connected with the other end of the first capacitor/the second capacitor through the selector switch so as to be connected to the first capacitor through the selector switch when the high-frequency isolation bidirectional converter works in a first state and be connected to the second capacitor through the selector switch when the high-frequency isolation bidirectional converter works in a second state, the other end of the second capacitor is also connected with one end of the first inductor, and the other end of the first capacitor and the second inductor are connected with the switch circuit, the other end of the second inductor and the other end of the first inductor are connected with a primary winding of a transformer, and a secondary winding of the transformer is connected with a middle point of a bridge arm of a full-bridge switching circuit, wherein in the first state, power is transmitted from the first external side to the second external side, and in the second state, power is transmitted from the second external side to the first external side.
2. The high frequency isolated bidirectional converter of claim 1, wherein: the switching circuit comprises two switching tubes which are connected in series to form a bridge arm, two ends of the bridge arm are used as first external sides of the high-frequency isolation bidirectional converter, and the first capacitor and the second inductor are respectively connected to the middle point and the lowest end of the bridge arm of the switching circuit.
3. The high frequency isolated bidirectional converter of claim 1, wherein: the switching circuit comprises two switching tubes which are connected in series to form a bridge arm, two ends of the bridge arm are used as first external sides of the high-frequency isolation bidirectional converter, and the first capacitor and the second inductor are respectively connected to the uppermost end and the middle point of the bridge arm of the switching circuit.
4. The high frequency isolated bidirectional converter of claim 1, wherein: the switching circuit comprises four switching tubes, every two switching tubes are connected in series to form a bridge arm, two ends of the two bridge arms are used as first external sides of the high-frequency isolation bidirectional converter after the two bridge arms are connected in parallel, and the first capacitor and the second inductor are respectively connected to the middle points of the two bridge arms of the switching circuit.
5. The high frequency isolated bidirectional converter of claim 1, wherein: the full-bridge switching circuit comprises four switching tubes, every two switching tubes are connected in series to form a bridge arm, two ends of the two bridge arms are used as second external connection sides of the high-frequency isolation bidirectional converter after the two bridge arms are connected in parallel, and the homonymous end and the heteronymous end of the secondary winding of the transformer are respectively connected to the middle points of the two bridge arms.
6. The high frequency isolated bidirectional converter of claim 1, wherein: the high-frequency isolation bidirectional converter further comprises a first filter capacitor and a second filter capacitor, wherein two ends of the first filter capacitor are connected to a first external side of the high-frequency isolation bidirectional converter, and two ends of the second filter capacitor are connected to a second external side.
7. A high frequency isolated bidirectional converter, characterized by: the high-frequency isolation bidirectional converter comprises a switch circuit, a resonance circuit, a transformer and a full-bridge switch circuit, wherein one side of the full-bridge switch circuit and one side of the switch circuit are respectively used as a second external side and a first external side of the high-frequency isolation bidirectional converter, the resonance circuit comprises a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor and a selector switch, two ends of the second capacitor are respectively connected with one end of the third inductor and one end of the first inductor, the other end of the third inductor is connected with one end of the first capacitor, one end of the second inductor is connected between the third inductor and the second capacitor, and the one end of the second inductor is also connected with the other end of the first capacitor/the first inductor through the selector switch so as to be connected to the first capacitor through the selector switch when the high-frequency isolation bidirectional converter works in a first state, the power supply circuit comprises a first inductor, a second inductor, a switch circuit, a transformer and a full-bridge switch circuit, wherein the first inductor is connected with the other end of the first capacitor through a selection switch in a second state, the other end of the first capacitor and the other end of the second inductor are connected with the primary winding of the transformer, the secondary winding of the transformer is connected with the middle point of a bridge arm of the full-bridge switch circuit, the power is transmitted from the first external side to the second external side in the first state, and the power is transmitted from the second external side to the first external side in the second state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210544039.4A CN114884366A (en) | 2022-05-18 | 2022-05-18 | High-frequency isolation bidirectional converter |
| PCT/CN2022/098505 WO2023221212A1 (en) | 2022-05-18 | 2022-06-14 | High-frequency isolated bidirectional converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210544039.4A CN114884366A (en) | 2022-05-18 | 2022-05-18 | High-frequency isolation bidirectional converter |
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| CN114884366A true CN114884366A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210544039.4A Pending CN114884366A (en) | 2022-05-18 | 2022-05-18 | High-frequency isolation bidirectional converter |
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| Country | Link |
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| CN (1) | CN114884366A (en) |
| WO (1) | WO2023221212A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116418239A (en) * | 2023-06-09 | 2023-07-11 | 深圳市永联科技股份有限公司 | Dual active bridge circuit, power supply and DC-DC converter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201602044D0 (en) * | 2016-02-04 | 2016-03-23 | Eltek As | Bidirectional DC-DC resonant converter |
| CN210780553U (en) * | 2019-08-29 | 2020-06-16 | 深圳市英威腾电气股份有限公司 | Bidirectional DC-DC converter based on LLC resonance |
| CN211557153U (en) * | 2019-12-23 | 2020-09-22 | 深圳市核达中远通电源技术股份有限公司 | Novel bidirectional full-bridge switching circuit |
| CN114070070A (en) * | 2021-12-15 | 2022-02-18 | 深圳深源技术能源有限公司 | High-efficiency bidirectional converter |
-
2022
- 2022-05-18 CN CN202210544039.4A patent/CN114884366A/en active Pending
- 2022-06-14 WO PCT/CN2022/098505 patent/WO2023221212A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116418239A (en) * | 2023-06-09 | 2023-07-11 | 深圳市永联科技股份有限公司 | Dual active bridge circuit, power supply and DC-DC converter |
| CN116418239B (en) * | 2023-06-09 | 2023-08-22 | 深圳市永联科技股份有限公司 | Dual active bridge circuit, power supply and DC-DC converter |
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|---|---|
| WO2023221212A1 (en) | 2023-11-23 |
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