CN112491155A - Multi-module SIPO circuit topology and control method for receiving end of magnetic parallel type electric automobile high-power dynamic wireless power supply system - Google Patents
Multi-module SIPO circuit topology and control method for receiving end of magnetic parallel type electric automobile high-power dynamic wireless power supply system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a multi-module SIPO circuit topology and a control method for a receiving end of a magnetic parallel type electric automobile high-power dynamic wireless power supply system, wherein the circuit topology structure specifically comprises a magnetic coupling mechanism and a compensation topology, a receiving end electric energy converter and a load; the magnetic coupling mechanism and the compensation topology are connected with a receiving end electric energy converter, and the receiving end electric energy converter is connected with a load; the receiving end electric energy converter is divided into two groups of H-bridges, a transformer and a group of controllable rectifying circuit units which are connected in series; the invention is applied to the field of dynamic wireless power supply of objects such as electric automobiles, automatic guided vehicles, rail transit and the like, and the parallel structure at the output side is magnetically connected in parallel through a transformer, so that the multi-module power synthesis and the front-and-back stage isolation functions can be realized; and then the power is supplied to a load battery or a battery and a motor through controllable rectification, so that constant voltage output under wide-range voltage input is realized.
Description
Technical Field
The invention relates to the field of wireless power supply, in particular to a multi-module SIPO circuit topology and a control method for a receiving end of a magnetic parallel type electric automobile high-power dynamic wireless power supply system.
Background
The scheme of the energy conversion circuit at the receiving end of the high-power dynamic wireless power supply system on the market generally has the following problems:
1. the basic structure of the dynamic wireless power supply system is shown in fig. 1, and the dynamic wireless power supply system is divided into a primary side system (ground part) and a secondary side system (vehicle-mounted part). In high power applications, the induced voltage output by the secondary wireless power transmission technology system is usually high enough to meet the requirements of transmission power and efficiency. However, due to the voltage stress threshold and cost limitations of power electronics, the input voltage of the secondary power management section is generally limited to a certain range.
2. Fig. 2 shows two typical secondary energy management circuit structures applied in a high-power wireless power supply system, in which an IGBT or a power MOSFET is generally used as a switching device in a DC-DC conversion module in fig. 2(a), a controllable rectification module is used as a main module of an energy management circuit in fig. 2(b), and a MOSFET is generally used as a switching device. Due to the limitation of the existing manufacturing technology, the power capacity and the frequency of the two devices are cross-limited, and the high-efficiency energy output of the electric automobile can not be realized by high power, which refers to the application environment in the power range of 20kW-200 kW.
3. In the dynamic wireless power supply system, because the position of the primary coil and the secondary coil changes in real time along with the movement of the vehicle, the voltage fluctuation of the secondary coupling is large, and therefore the high-frequency rectifying module has wide-range electric energy input requirements. Under the same output power level, the lower the input voltage that the high-frequency rectification input can bear, the larger the average current that runs in the receiving end coil, which is not favorable for improving the transmission efficiency of the system, nor favorable for the lightening and miniaturization of the receiving end coil, and the worse the safety and economy are even when the receiving end coil runs for a long time.
Disclosure of Invention
The invention aims to solve the problems of low transmission efficiency, overlarge receiving end module, poor safety and economy and the like of a dynamic wireless power supply system of an object such as an electric automobile, an Automatic Guided Vehicle (AGV), a rail transit and the like at present, and provides a receiving end multi-module SIPO circuit topology and a control method of a magnetic parallel type electric automobile high-power dynamic wireless power supply system.
The invention is realized by the following technical scheme, the invention provides a multi-module SIPO circuit topology at the receiving end of a magnetic parallel type electric automobile high-power dynamic wireless power supply system, wherein the SIPO circuit is a secondary side energy management circuit with serial input and parallel output based on a controllable rectifying circuit; the circuit topological structure specifically comprises a magnetic coupling mechanism, a compensation topology, a receiving end electric energy converter and a load; the magnetic coupling mechanism and the compensation topology are connected with a receiving end electric energy converter, and the receiving end electric energy converter is connected with a load; the receiving end electric energy converter comprises a first group of H bridges, a second group of H bridges, a transformer and a controllable rectifying circuit unit, wherein the two groups of H bridges are connected in series; the two groups of serially connected H bridges are connected with the controllable rectifying circuit unit through a transformer; the controllable rectifying circuit unit comprises two IGBT tubes and a capacitor, one end of the capacitor is connected with one end of the transformer and one end of the load respectively, the other end of the capacitor is connected with one end of the two IGBT tubes connected in parallel and the other end of the load respectively, and the other ends of the two IGBT tubes are connected with the transformer.
Further: and each group of H bridges in the two groups of H bridges connected in series comprises 4 IGBT tubes, and the 4 IGBT tubes form an H type.
Further: the load is an electric automobile battery or a battery and a motor.
Further: the magnetic coupling mechanism is an inductor wound by a coil; the compensation topology is composed of a capacitor or an inductor and a capacitor.
The invention also provides a control method applied to a receiving end multi-module SIPO circuit topology of the magnetic parallel type electric automobile high-power dynamic wireless power supply system, wherein electric energy received by the resonance coil is input into a receiving end electric energy converter through two paths of series-connected full-bridge circuits, a group of IGBTs are simultaneously switched on by adjusting the two paths of receiving end electric energy converters to realize the simultaneous conduction of the input sides of the two receiving ends, and at the moment, four IGBT tubes share the output voltage stress of the receiving ends, so that the upper limit of the voltage input of one-time receiving end is improved, and the high-frequency rectification; the control method has two typical working states, and the parallel structure at the output side is magnetically connected in parallel through a transformer, so that the functions of power synthesis and front and rear stage isolation can be realized; then the load is supplied with power through the controllable rectifying circuit unit; and meanwhile, the output power control is realized by performing controllable rectification through PWM.
Further: the two typical working states are specifically:
(1) working state 1: PWM1 is at low level, PWM2 is at high level, IGBT tube S2、S3、S8、S9、S5Conducting IGBT tube S1、S4、S7、S10、S6Turning off;
(2) and 2, working state: PWM1 is at high level, PWM2 is at low level, IGBT tube S2、S3、S8、S9、S5Turn-off, IGBT tube S1、S4、S7、S10、S6And conducting.
Drawings
Fig. 1 is a schematic diagram of a basic structure of a dynamic wireless power supply system in the prior art;
FIG. 2 is a diagram of two typical prior art secondary side energy management circuits; (a) the secondary side energy management circuit structure is formed by using an uncontrolled rectifier and a DC-DC module, and (b) the secondary side energy management circuit structure is formed by using a controllable rectifier module;
FIG. 3 is a receiving end power converter of SIPO based on a controllable rectification circuit;
FIG. 4 is a schematic diagram of the general operating conditions of SIPO;
FIG. 5 shows two operating states of a general operating condition IGBT tube of SIPO, wherein (a) is operating state 1, and (b) is operating state 2;
fig. 6 is a schematic diagram of input current, PWM control signal and no-load voltage.
Detailed Description
The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiment of the present invention. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the present concepts and the claimed embodiments may be practiced without such inventive faculty. All falling within the scope of the present invention.
The invention aims to solve the problems of low transmission efficiency, overlarge receiving end module, poor safety and economy and the like of a dynamic wireless power supply system of an object such as an electric automobile, an Automatic Guided Vehicle (AGV), rail transit and the like at present, and provides a SIPO circuit topology and a control method for multiple modules at the receiving end of a magnetic parallel type electric automobile high-power dynamic wireless power supply system in a high-power environment with the power range of 20kW-200 kW.
With reference to fig. 1 to 6, the present invention is realized by the following technical solutions, and the present invention proposes: a magnetic parallel type electric automobile high-power dynamic wireless power supply system receiving end multi-module SIPO circuit topology, as shown in figure 3, is a receiving end electric energy converter based on SIPO of a controllable rectifying circuit, wherein the SIPO circuit is a secondary side energy management circuit based on input series connection and output parallel connection of the controllable rectifying circuit; the circuit topological structure specifically comprises a magnetic coupling mechanism, a compensation topology, a receiving end electric energy converter and a load; the magnetic coupling mechanism and the compensation topology are connected with a receiving end electric energy converter, and the receiving end electric energy converter is connected with a load; the receiving end electric energy converter comprises a first group of H bridges, a second group of H bridges, a transformer and a controllable rectifying circuit unit, wherein the two groups of H bridges are connected in series; the two groups of serially connected H bridges are connected with the controllable rectifying circuit unit through a transformer; the controllable rectifying circuit unit comprises two IGBT tubes and a capacitor, one end of the capacitor is connected with one end of the transformer and one end of the load respectively, the other end of the capacitor is connected with one end of the two IGBT tubes connected in parallel and the other end of the load respectively, and the other ends of the two IGBT tubes are connected with the transformer.
And each group of H bridges in the two groups of H bridges connected in series comprises 4 IGBT tubes, and the 4 IGBT tubes form an H type.
The load is an electric automobile battery or a battery and a motor.
The magnetic coupling mechanism is an inductor wound by a coil; the compensation topology is composed of a capacitor or an inductor and a capacitor.
The invention also provides a control method applied to a receiving end multi-module SIPO circuit topology of the magnetic parallel type electric automobile high-power dynamic wireless power supply system, wherein electric energy received by the resonance coil is input into a receiving end electric energy converter through two paths of series-connected full-bridge circuits, a group of IGBTs are simultaneously switched on by adjusting the two paths of receiving end electric energy converters to realize the simultaneous conduction of two receiving end input sides, at the moment, four IGBT tubes share the output voltage stress of the receiving ends, the upper limit of the voltage input of one-time receiving end is improved, and the high-frequency rectification input can normally work within 2000V (using 1200V-level; the control method has two typical working states, and the parallel structure at the output side is magnetically connected in parallel through a transformer, so that the functions of power synthesis and front and rear stage isolation can be realized; then the load is supplied with power through the controllable rectifying circuit unit; and meanwhile, the output power control is realized by performing controllable rectification through PWM.
As shown in fig. 4, a schematic diagram of a general working condition of SIPO is shown, the working condition is divided into two working states, an electric energy input side is provided with two groups of series-connected IGBT tubes, an output side is provided with a controllable rectifier circuit unit, and all switching tubes are strictly controlled in a coordinated manner to realize constant voltage output under wide-range voltage input;
fig. 5 and fig. 6 show two typical operation modes of the system, and the battery load is charged by controlling the switching tube timing to make the output current always be the current in the same direction. Meanwhile, output power control is realized through PWM and controllable rectification of the parallel output side of the receiving end, and the two typical working states are as follows:
(1) working state 1: PWM1 is at low level, PWM2 is at high level, IGBT tube S2、S3、S8、S9、S5Conducting IGBT tube S1、S4、S7、S10、S6Turning off;
(2) and 2, working state: PWM1 is at high level, PWM2 is at low level, IGBT tube S2、S3、S8、S9、S5Turn-off, IGBT tube S1、S4、S7、S10、S6And conducting.
The SIPO circuit topology and the control method at the receiving end of the magnetic parallel type electric vehicle high-power dynamic wireless power supply system provided by the invention are introduced in detail, the principle and the implementation mode of the invention are explained herein, and the above explanation is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. The multi-module SIPO circuit topology at the receiving end of the magnetic parallel type electric automobile high-power dynamic wireless power supply system is characterized in that: the SIPO circuit is a secondary side energy management circuit with serial input and parallel output based on a controllable rectification circuit; the circuit topological structure specifically comprises a magnetic coupling mechanism, a compensation topology, a receiving end electric energy converter and a load; the magnetic coupling mechanism and the compensation topology are connected with a receiving end electric energy converter, and the receiving end electric energy converter is connected with a load; the receiving end electric energy converter comprises a first group of H bridges, a second group of H bridges, a transformer and a controllable rectifying circuit unit, wherein the two groups of H bridges are connected in series; the two groups of serially connected H bridges are connected with the controllable rectifying circuit unit through a transformer; the controllable rectifying circuit unit comprises two IGBT tubes and a capacitor, one end of the capacitor is connected with one end of the transformer and one end of the load respectively, the other end of the capacitor is connected with one end of the two IGBT tubes connected in parallel and the other end of the load respectively, and the other ends of the two IGBT tubes are connected with the transformer.
2. The circuit topology of claim 1, wherein: and each group of H bridges in the two groups of H bridges connected in series comprises 4 IGBT tubes, and the 4 IGBT tubes form an H type.
3. The circuit topology of claim 1, wherein: the load is an electric automobile battery or a battery and a motor.
4. The circuit topology of claim 1, wherein: the magnetic coupling mechanism is an inductor wound by a coil; the compensation topology is composed of a capacitor or an inductor and a capacitor.
5. A control method of a multi-module SIPO circuit topology at a receiving end of a magnetic parallel type electric vehicle high-power dynamic wireless power supply system according to any one of claims 1 to 4 is characterized in that: the electric energy received by the resonance coil is input into the receiving end electric energy converter through two paths of full-bridge circuits connected in series, a group of IGBTs are simultaneously switched on by adjusting the two paths of receiving end electric energy converters to realize that the input sides of two receiving ends are simultaneously switched on, and at the moment, four IGBT tubes share the output voltage stress of the receiving ends, so that the upper limit of voltage input of one time of the receiving ends is improved, and the high-frequency rectification input can normally work within 2000V; the control method has two typical working states, and the parallel structure at the output side is magnetically connected in parallel through a transformer, so that the functions of power synthesis and front and rear stage isolation can be realized; then the load is supplied with power through the controllable rectifying circuit unit; and meanwhile, the output power control is realized by performing controllable rectification through PWM.
6. The control method according to claim 5, characterized in that the two typical operating states are in particular:
(1) working state 1: PWM1 is at Low, PWM2 is at highFlat, IGBT tube S2、S3、S8、S9、S5Conducting IGBT tube S1、S4、S7、S10、S6Turning off;
(2) and 2, working state: PWM1 is at high level, PWM2 is at low level, IGBT tube S2、S3、S8、S9、S5Turn-off, IGBT tube S1、S4、S7、S10、S6And conducting.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997804A (en) * | 2021-10-27 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Wireless power supply system for ship |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849299A (en) * | 2017-03-17 | 2017-06-13 | 山东大学 | The variable magnetic coupling resonant radio energy transmitting device of resonance compensation topology and method |
| CN110936827A (en) * | 2019-12-20 | 2020-03-31 | 中兴新能源汽车有限责任公司 | Wireless charging system, wireless charging control method and automobile wireless charging device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849299A (en) * | 2017-03-17 | 2017-06-13 | 山东大学 | The variable magnetic coupling resonant radio energy transmitting device of resonance compensation topology and method |
| CN110936827A (en) * | 2019-12-20 | 2020-03-31 | 中兴新能源汽车有限责任公司 | Wireless charging system, wireless charging control method and automobile wireless charging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997804A (en) * | 2021-10-27 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Wireless power supply system for ship |
| CN113997804B (en) * | 2021-10-27 | 2023-06-30 | 重庆前卫无线电能传输研究院有限公司 | Wireless power supply system for ship |
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