CN111559260A - Unmanned aerial vehicle wireless charging system - Google Patents
Unmanned aerial vehicle wireless charging system Download PDFInfo
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- CN111559260A CN111559260A CN202010320996.XA CN202010320996A CN111559260A CN 111559260 A CN111559260 A CN 111559260A CN 202010320996 A CN202010320996 A CN 202010320996A CN 111559260 A CN111559260 A CN 111559260A
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- 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
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- 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
- B60L53/30—Constructional details of charging stations
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- 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
- B60L2200/00—Type of vehicles
- B60L2200/10—Air crafts
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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
- 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
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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
- 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
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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
- Y02T90/12—Electric charging stations
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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
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a wireless charging system of an unmanned aerial vehicle, which comprises the unmanned aerial vehicle and a charging platform, wherein a wireless charging receiving module is arranged on the unmanned aerial vehicle; the receiving module includes: the receiving end pole plate, the receiving end control circuit, the receiving end communicator and the battery pack are arranged on the receiving end; the transmission module includes: the device comprises a transmitting end polar plate, a transmitting end control circuit and a transmitting end communicator; in the wireless charging process, the receiving end polar plate and the transmitting end polar plate are in the working range of forming the capacitor. The preparation of receiving terminal polar plate preparation is simple and easy, and light in weight moreover, unmanned aerial vehicle berths on charging platform, and the clearance between the polar plate is very little, and is very little to the electromagnetic interference of surrounding environment, when having metallic conductor between receiving terminal polar plate and the transmitting terminal polar plate or around, also can not arouse the loss because the conductor produces the eddy current effect and generate heat, and the application of charging of especially adapted unmanned aerial vehicle is used.
Description
Technical Field
The invention relates to the field of wireless charging, in particular to a wireless charging system for an unmanned aerial vehicle.
Background
Wireless energy transmission is currently commonly divided into two modes-a mode based on magnetic field coupling and a mode based on electric field coupling. The magnetic field coupling method has been widely applied and paid attention to in the fields of consumer electronics, AGV (Automated Guided Vehicle) and electric vehicles. The coupling mechanism that magnetic field coupling adopted generally comprises multilayer structures such as litz coil, ferrite, shielding layer, has with high costs, the heavy scheduling problem of weight, some magnetic field leakage and electromagnetic interference also can be produced to the magnetic field coupling mode at wireless transmission's in-process, if have in the transmission space when metal foreign matter can not be discerned, can lead to the foreign matter temperature to rise because of the eddy current effect, inflammable matter can ignite and arouse the conflagration even, unmanned on duty occasion such as unmanned aerial vehicle charges still has some potential safety hazards problem to overcome.
Disclosure of Invention
The invention provides an unmanned aerial vehicle wireless charging system which has the advantages of low cost and low weight and can reduce potential safety hazards caused by metal foreign matters.
The wireless charging system for the unmanned aerial vehicle comprises the unmanned aerial vehicle and a charging platform, wherein a wireless charging receiving module is arranged on the unmanned aerial vehicle, the charging platform is provided with a bearing surface for bearing the unmanned aerial vehicle, and a wireless charging transmitting module is arranged on the bearing surface; the receiving module includes: the receiving end pole plate, the receiving end control circuit, the receiving end communicator and the battery pack are arranged on the receiving end; the transmission module includes: the device comprises a transmitting end polar plate, a transmitting end control circuit and a transmitting end communicator; in the wireless charging process, the receiving end polar plate and the transmitting end polar plate are in a working range, wherein the working range refers to a range in which the receiving end polar plate and the transmitting end polar plate can form a capacitor.
Preferably, the carrying surface covers the emitter electrode plate, and the carrying surface at least in the region of the emitter electrode plate is an insulating dielectric layer.
Preferably, the receiving end polar plate is arranged at the bottom of a landing frame of the unmanned aerial vehicle and is arranged towards the charging platform; and an insulating dielectric layer covers the receiving end polar plate.
Preferably, the receiving end polar plate and the transmitting end polar plate are both cylindrical, one of the receiving end polar plate and the transmitting end polar plate is sleeved in the other one of the receiving end polar plate and the transmitting end polar plate, and a gap is formed between the outer wall of the cylindrical part close to the inner part and the inner wall of the cylindrical part close to the outer part.
Preferably, the receiving end polar plate and the transmitting end polar plate are both composed of a plurality of polar plate arrays.
Preferably, the receiving end polar plate is divided into two parts, namely a first central part and a first outer ring part arranged around the first central part; the transmitting end polar plate is divided into two parts, namely a second central part and a second outer ring part arranged around the second central part; during wireless charging, the first center part and the second center part are in a working range of forming a capacitor; the first outer ring portion and the second outer ring portion are within an operating range in which a capacitance is formed.
The receiving end control circuit includes: the receiving terminal comprises a receiving terminal compensation circuit, a receiving terminal rectifying circuit, a receiving terminal filter circuit and a receiving terminal controller.
Preferably, the transmitting end control circuit comprises a transmitting end compensation circuit, a transmitting end inverter circuit and a transmitting end controller; and the transmitting end control circuit is communicated with a power supply.
Preferably, the transmitting end control circuit further comprises a transmitting end rectifying circuit and a transmitting end filtering circuit.
Preferably, the transmitting terminal plates have a plurality of sets, and at least one set of the transmitting terminal plates is selectively operated by controlling the switch.
When the unmanned aerial vehicle wireless charging system works, the receiving end pole plate is easy to manufacture, light in weight and unlimited in shape, the unmanned aerial vehicle cannot increase extra load burden, and the overall cost of the unmanned aerial vehicle wireless charging system is very small in magnitude compared with that of a magnetic coupling coil. Unmanned aerial vehicle berths on charging platform, and the clearance between the polar plate is very little, and alternating electric field distribution of the overwhelming majority is between the polar plate when wireless charging, and is very little to the electromagnetic interference of surrounding environment. Especially when there is the metallic conductor between receiving terminal polar plate and the transmission end polar plate or around, also can not cause loss and generate heat because the conductor produces the eddy current effect, the charge of especially being fit for unmanned aerial vehicle is used.
Drawings
Fig. 1 is a schematic view of the overall structure of the wireless charging system for the unmanned aerial vehicle according to the present invention.
Fig. 2 is a schematic diagram of a receiving module and a transmitting module in the wireless charging system of the unmanned aerial vehicle according to the present invention.
Fig. 3 is a schematic diagram of an embodiment of a receiving end pad and a transmitting end pad in the wireless charging system of the unmanned aerial vehicle according to the invention.
Fig. 4 is a schematic view of another embodiment of a receiving end pole plate and a transmitting end pole plate in the wireless charging system of the unmanned aerial vehicle.
Fig. 5 is a schematic diagram of a control switch in the wireless charging system of the unmanned aerial vehicle according to the present invention.
Fig. 6 is a side circuit structure of the unmanned aerial vehicle in the wireless charging system of the unmanned aerial vehicle of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The wireless charging system for the unmanned aerial vehicle comprises an unmanned aerial vehicle 4 and a charging platform 3. Charging platform 3 on the one hand can provide wireless charging for unmanned aerial vehicle, can also regard as unmanned aerial vehicle 4's the platform of parking simultaneously. The following description is mainly directed to wireless charging.
It should be noted that since it is a wireless charging system, it is obviously necessary that both the unmanned aerial vehicle 4 and the charging platform 3 support the wireless charging function. Referring to fig. 1, install wireless receiving module 1 that charges on unmanned aerial vehicle 4, it is corresponding, should have wireless transmission module 2 that charges on load-bearing platform, specifically, because charging platform 3 still bears unmanned aerial vehicle 4's function, consequently, charging platform 3 is last to have loading surface 31 to support unmanned aerial vehicle 4 usefulness, install wireless transmission module 2 that charges on loading surface 31 and just change the work of wireless charging.
In conjunction with fig. 1 and 2, the receiving module 1 includes a receiving-end pad 11, a receiving-end control circuit 12, a receiving-end communicator 13, and a battery pack 14. The transmitting module 2 includes a transmitting end plate 21, a transmitting end control circuit 22 and a transmitting end communicator 23.
In some preferred embodiments, the receiving-end control circuit 12 includes: the receiving terminal comprises a receiving terminal compensation circuit, a receiving terminal rectifying circuit, a receiving terminal filter circuit and a receiving terminal controller. The transmitting end control circuit 22 comprises a transmitting end compensation circuit, a transmitting end inverter circuit and a transmitting end controller; the transmitting-end control circuit 22 is in communication with a power supply. It should be noted that the receiving end compensation circuit and the transmitting end compensation circuit may be provided at the same time, or only one. Generally, double-ended compensation is common (double-ended compensation is to arrange a receiving-end compensation circuit and a transmitting-end compensation circuit at the same time) because better transmission characteristics can be obtained. However, it is equally applicable to the present application to provide only the receiving-side compensation circuit or only the transmitting-side compensation circuit. That is, at least one side of the transmitting module 2 and the receiving module 1 includes a compensation circuit. For convenience of description, the receiving-end compensation circuit and the transmitting-end compensation circuit are collectively referred to as a compensation circuit hereinafter.
The receiving end electrode plate 11 and the transmitting end electrode plate 21 constitute two basic devices during wireless charging, and when charging is needed, the two devices need to be in a proper working range, in the working range, the receiving end electrode plate 11 and the transmitting end electrode plate 21 can form a capacitor, and wireless transmission of electric energy is realized by the characteristic of the capacitor. The specific numerical value of this working range needs to set up according to receiving terminal polar plate 11 and the characteristic differentiation such as material, size of transmitting terminal polar plate 21, generally can satisfy when unmanned aerial vehicle 4 parks charging platform 3, can satisfy working distance can.
Generally, the carrying surface 31 of the charging platform 3 covers the emitter electrode plate 21, i.e. the emitter electrode plate 21 is not directly exposed, and at least the carrying surface 31 in the region of the emitter electrode plate 21 is an insulating dielectric layer. That is, at least the emitter end plate 21 is covered with a dielectric layer, which may be the carrier platform itself or an additional dielectric layer.
Receiving terminal polar plate 11 sets up on unmanned aerial vehicle 4 to being towards the 3 directions of charging platform and setting up, the original intention of its setting is exactly in order to form electric capacity in working range with transmitting terminal polar plate 21, guarantees going on of wireless work of charging. Preferably, the receiving terminal plate 11 is disposed at the bottom of the landing pad 41 and faces the charging platform 3. Of course, the receiving end plate 11 is directly disposed at the bottom of the main body of the drone 4, as long as the formed capacitance with the transmitting end plate 21 is not affected. Meanwhile, the receiving end plate 11 is covered with an insulating dielectric layer.
The dielectric layer between the receiving end plate 11 and the transmitting end plate 21 can effectively increase the coupling capacitance value, maintain good insulation between the receiving end plate 11 and the transmitting end plate 21 and improve the electric energy transmission capability of the system. As an example, the dielectric layer may be directly adhered or coated on the facing surfaces of the receiving end plate 11 and the transmitting end plate 21. The dielectric layer may be: one or a combination of glass, ceramic laminate, barium titanate, lead zirconate titanate and titanium dioxide.
Above-mentioned set up receiving terminal polar plate 11 in unmanned aerial vehicle 4 body bottom or landing frame 41 to and set up transmitting terminal polar plate 21 at the loading face 31 of charging platform 3, be preferred scheme, other can realize letting receiving terminal polar plate 11 and transmitting terminal polar plate 21 form the position that sets up of electric capacity, can be applicable to this application equally. For example, the annular receiving end plate 11 is arranged around the unmanned aerial vehicle 4, and the corresponding annular transmitting end plate 21 is also arranged around the bearing surface 31. Even, charging platform 3 makes "box" structure, has a plurality of outer walls promptly, and a plurality of outer walls form inside accommodation space, and this accommodation space is used for holding unmanned aerial vehicle 4, and loading end 31 is as accommodation space's bottom surface, and at this moment, a plurality of outer walls all can regard as the transmission end polar plate 21 to use, and the receiving end polar plate 11 on unmanned aerial vehicle 4 can set up in any position, can both have the transmission end polar plate 21 that corresponds and cooperate with it.
Several alternative arrangements of the receive end plate 11 and the transmit end plate 21 are described below. For example, the receiving end plate 11 and the transmitting end plate 21 are both cylindrical, as shown in fig. 3, one of them is sleeved in the other, and there is a gap between the outer wall of the inner cylinder and the inner wall of the outer cylinder. This mode can be suitable for above-mentioned "unmanned aerial vehicle 4 sets up annular receiving terminal polar plate 11 all around, and the supporting surface 31 also sets up the form of corresponding annular transmitting terminal polar plate 21 all around, also can be that receiving terminal polar plate 11 sets up on 4 body bottoms of unmanned aerial vehicle or landing frame 41, and transmitting terminal polar plate 21 sets up on supporting surface 31. When the unmanned aerial vehicle 4 is parked on the bearing surface 31, the receiving end polar plate 11 is matched with the transmitting end polar plate 21 in a nesting mode, and the receiving end polar plate 11 extends into the transmitting end polar plate 21.
Alternatively, as shown in fig. 4, the receiving end plate 11 and the transmitting end plate 21 are both composed of a plurality of plate arrays. The coverage area of the transmitting end polar plate 21 can be the range of the whole bearing surface 31, the precision requirement on the placing position when the unmanned aerial vehicle 4 is parked can be reduced, and the requirement on the working range can be met as long as the unmanned aerial vehicle is parked. The receiving end plate 11 and the transmitting end plate 21 shown in fig. 3 have a "honeycomb shape", and the number of receiving end plates 11 may be smaller than the number of transmitting end plates 21.
In another alternative arrangement, the receiving end plate 11 is divided into two parts, namely a first central part and a first outer ring part arranged around the first central part; the transmitting end polar plate 21 is divided into two parts, namely a second central part and a second outer ring part arranged around the second central part; during wireless charging, the first center part and the second center part are in a working range of forming a capacitor; the first outer ring portion and the second outer ring portion are within an operating range in which a capacitance is formed.
The above description of the receiving end plate 11 and the transmitting end plate 21 is only a preferred embodiment, and is not intended to limit the present application, and other forms may also be used in the present application, for example, the most basic structure is that the receiving end plate 11 and the transmitting end plate 21 are both plate-shaped plates, and a capacitor can be formed in an operating range.
As an example, the transmitting end plate 21 and the receiving end plate 11 may be made of a thin metal material such as a copper foil, an aluminum foil, or a carbon material, a metal oxide, a hydrate, a conductive polymer, or the like, and the transmitting end plate 21 and the receiving end plate 11 may be in one or a combination of a circular type, a flat type, a cylindrical type, a ball type, a stacked type, an array type, and the like. When the polar plates are in an array type, namely, the receiving end polar plate 1 and the transmitting end polar plate 21 are both composed of a plurality of polar plate arrays. At this time, the plurality of electrode plates of the transmitting end electrode plate 21 and the plurality of electrode plates of the receiving end electrode plate 11 are coupled to form a plurality of capacitors, and the capacitors are equivalent to a group of coupling capacitors in a series-parallel connection relationship.
In some embodiments, the transmitting end plates 21 may be multiple sets, as shown in fig. 5, these transmitting end plates 21 are connected to the control switch 5, when the receiving end plate 11 of the drone is aligned with one or more sets of transmitting end plates 21, the transmitting controller switches on the control switch 5 connected to the corresponding transmitting end plate 21 to form a coupled capacitor with the receiving end plate 11, and this way, switching may be performed according to the transmitting end plate 21 aligned by the drone, so as to facilitate alignment of the drone. For example, as shown in fig. 5, the receiving end plate 11 corresponds to the middle two transmitting end plates 21 to form a capacitor, and at this time, the middle two control switches 5 are closed, so that the corresponding two transmitting end plates 21 can operate, that is, the receiving end plate 11 and the capacitor can form a need for completing wireless charging.
It should be noted that, when the transmitting end plate 21 and the receiving end plate 11 form a capacitor and wireless charging is implemented, two plates are generally required to work respectively to form a closed circuit. In the present application, when the number is not particularly mentioned, it can be understood that the transmitting end electrode plate 21 may be formed by two electrode plates, and correspondingly, the receiving end electrode plate 11 may also be formed by two electrode plates. Unmanned aerial vehicle 4 among 4 wireless charging systems of unmanned aerial vehicle can also include organism structure, driving system, navigation, flight control system, task load and cloud platform etc. except foretell receiving module 1. The power system includes a motor 42, a drive circuit 43 for driving the motor 42 to operate, and the like.
The receiving mold 1 is connected to a charging input port of the battery pack 14. The charging controller in the receiving-end control circuit 12 may be provided independently, or may be part of a flight control system or other controller of the drone 4. The receiving-end communicator 13 may also be an independent part, and may not only be used for communication in the wireless charging process, but also be used for communication of the whole drone 4, for example, communication with an operator.
Unmanned aerial vehicle 4 is at the flight in-process, and when the electric quantity of the group battery 14 in flight drops below the safety threshold, unmanned aerial vehicle 4 is walked around under the guide of GPS, sensor or visual system in navigation, and automatic landing is on ground charging platform 3, begins to supplement the electric quantity through wireless charging. The battery pack 14 is used for storing electric energy through wireless charging, and supplying power to other parts such as a power system. The above-described receiver module 1 including the battery pack 14 does not limit the battery pack 14 to be operable only for the receiver module 1.
When the alternating current power supply is adopted, the transmitting module 2 needs to be additionally provided with circuits with a rectifying function and a filtering function, namely a transmitting end rectifying circuit and a transmitting end filtering circuit.
The receiving end electrode plate 11 and the transmitting end electrode plate 21 are generally divided into two groups, and the two groups of the transmitting end electrode plates 21 and the two groups of the receiving end electrode plates 11 are respectively aligned and coupled to form two capacitors during wireless charging. When the transmitting end plate 21 is directly mounted on the carrying surface 31 of the charging platform 3, the receiving end plate 11 may be mounted at the bottom of the drone or separately mounted below the landing frame 41 of the drone 4, the receiving end plate 11 being able to align with the transmitting end plate 21 under the control of the flight control system of the drone 4 when the drone 4 is parked on the charging platform 3. The receiving end plate 11 may also be mounted at other locations on the drone 4 and turned to the bottom by a turning mechanism to align with the transmitting end plate 21 when charging is required.
The receiving end polar plates 11 can also be arranged on the side surface, the top and other positions of the unmanned aerial vehicle 4, the corresponding transmitting end polar plates 21 are arranged on the other surface vertical to or parallel to the platform, the installation mode is only an example, the installation position of the receiving end polar plates 11 is not strictly required, as long as two groups of transmitting end polar plates 21 and the receiving end polar plates 11 can be respectively aligned when in charging, and the distance between the polar plates can meet the charging requirement.
When the power supply source wirelessly charged by the unmanned aerial vehicle 4 is alternating current, the alternating current output by the power supply source is converted into direct current through the transmitting end rectifying circuit and the transmitting end filtering circuit. The direct current output when the power supply is direct current or the direct current converted from alternating current when the power supply is alternating current is sent to the transmitting end inverter circuit to be converted into high-frequency alternating current, and then is applied to the transmitting end polar plate 21 through the transmitting end compensation circuit.
A coupling capacitor is formed between the transmitting end electrode plate 21 and the receiving end electrode plate 11 through the alignment of the transmitting end electrode plate 21 and the receiving end electrode plate 11, and two coupling capacitors formed by the two groups of transmitting end electrode plates 21 and the two groups of receiving end electrode plates 11 enable a transmitting circuit and a receiving circuit to be communicated to form a loop. Under the effect of high frequency high voltage alternating current, high frequency alternating current transmits to receiving terminal rectifier circuit of receiving module through the electric capacity of coupling on, and high frequency alternating current is direct current through receiving terminal rectifier circuit conversion, and after the stray waveform of receiving terminal filter circuit filtering again, from the group battery 14 of charging port input to unmanned aerial vehicle 4 to charge for unmanned aerial vehicle is wireless.
The two compensation circuits at least comprise one compensation inductor, and the coupling capacitor formed by the compensation inductor and the pole plate forms a resonance network in one of series connection and parallel connection modes. Or a composite compensation circuit can be formed by combining a plurality of inductors and/or capacitors, and then the composite compensation circuit and the coupled capacitor (the capacitor formed by the transmitting end electrode plate 21 and the receiving end electrode plate 11) form a resonant network.
By arranging the compensation circuit, the compensation inductor and the coupled capacitor form a resonance network which can work in a resonance state to improve the voltage on the coupling capacitor and generate larger displacement current between the coupling capacitors, thereby realizing the energy transfer. The compensation circuit can also compensate the reactive power in the power circuit, and the working efficiency of system charging is improved.
However, since the capacitance formed by the transmitting end electrode plate 21 and the receiving end electrode plate 11 is generally smaller in capacitance value, in order to obtain higher transmission power and transmission efficiency, when a compensation circuit is configured, a larger compensation inductor needs to be used or the system works at a higher working frequency, and the working frequency is too high, so that the loss of a power switch tube and the electromagnetic interference of the system are inevitably increased, and the control difficulty of the system is also increased; and increasing the compensation inductance increases the volume and weight of the system. When the compensation circuit is arranged in the receiving module (i.e. the receiving end compensation circuit), or both sides are arranged simultaneously, as with the coil adopting magnetic coupling wireless charging, the load of the unmanned aerial vehicle 4 is also additionally increased, which limits the application of the wireless charging system in the unmanned aerial vehicle. In order to solve the problem, the motor 42 in the unmanned aerial vehicle power system can be integrated into a compensation circuit as a compensation inductor, so that the utilization rate of devices is improved, and the system cost is reduced.
Fig. 6 shows a partial circuit structure of the unmanned aerial vehicle 4, taking the unmanned aerial vehicle as an example of an external rotor brushless dc motor, and the coil winding of the motor 42 is in a delta connection mode. The winding of a motor of unmanned aerial vehicle has connected 2 change over switches, show with K1 and K2 respectively in the picture, and in unmanned aerial vehicle flight process, first change over switch K1 switch-on, second change over switch K2 disconnection, group battery 14 provides power for the motor rotation, and flight control system passes through drive circuit 43 and adjusts motor 42 speed, switches the rotation direction and opens and stop operation such as stop to control unmanned aerial vehicle and accomplish the flight task. In the charging process of the unmanned aerial vehicle, the first switch K1 is switched off, the second switch K2 is switched on, the capacitor formed between the transmitting end electrode plate 21 and the receiving end electrode plate 11 is connected with the motor coil winding, the motor 42 coil winding is equivalent to an inductor in series-parallel connection, the motor equivalent inductor is equivalent to a capacitor formed between the transmitting end electrode plate 21 and the receiving end electrode plate 11 in series connection to form a series resonance network, and the transmitting module 2 outputs high-frequency alternating current.
Besides, a plurality of motors of the multi-rotor unmanned aerial vehicle can obtain a more suitable inductance value for forming a resonance network through series-parallel combination, and besides series resonance, a capacitor formed between the transmitting end electrode plate 21 and the receiving end electrode plate 11 and a motor equivalent inductor can be in parallel resonance, or can be in series-parallel connection with a plurality of inductors and capacitors to form a composite resonance circuit.
In whole charging process, unmanned aerial vehicle's charge controller passes through wireless communication and continuously sends the demand of charging to charge platform 3's transmitting terminal controller, including signals such as electric current, voltage to can gather charging current, voltage, monitor battery power. The charging platform 3 adjusts the output of the power supply according to the charging requirement, and controls the parameters of the frequency, the phase and the like of the high-frequency alternating current, so that the coupled capacitor and the compensation circuit are in a resonance state. And after the unmanned aerial vehicle finishes charging, the receiving end controller sends a charging stopping command to the transmitting end controller of the charging platform 3, and the charging process is terminated.
Wireless communication between charging platform 3 and unmanned aerial vehicle data can be carried out through the communication module that each is built-in. In addition, as an example, a signal to be communicated may be loaded in a form of a modulated carrier wave into a high-frequency alternating current electric wave of wireless transmission, and a demodulation circuit is added to a receiving circuit to demodulate a transmitted data signal from the high-frequency alternating current electric wave, so as to implement parallel transmission of energy and the signal.
In the invention, when wireless charging is realized through electric field coupling, the receiving end plate 11 of the receiving module 1 is very simple and light and thin in manufacture, the shape is not limited, the unmanned aerial vehicle is not subjected to additional load burden, and the overall cost is very small compared with that of a magnetic coupling coil. Unmanned aerial vehicle berths on charging platform 3, and the clearance between the polar plate is very little, and the alternating electric field of the overwhelming majority distributes between the polar plate when wireless charging, and is very little to the electromagnetic interference of surrounding environment. Especially when there is metallic conductor between the electric field polar plate or around, also can not cause loss and generate heat because the conductor produces the eddy current effect, the very suitable unmanned aerial vehicle's that charges is used.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. An unmanned aerial vehicle wireless charging system comprises an unmanned aerial vehicle (4) and a charging platform (3), and is characterized in that,
a wireless charging receiving module (1) is installed on the unmanned aerial vehicle (4), the charging platform (3) is provided with a bearing surface (31) for bearing the unmanned aerial vehicle (4), and a wireless charging transmitting module (2) is installed on the bearing surface (31);
the receiving module (1) comprises: the receiving terminal comprises a receiving terminal polar plate (11), a receiving terminal control circuit (12), a receiving terminal communicator (13) and a battery pack (14);
the transmission module (2) comprises: a transmitting terminal polar plate (21), a transmitting terminal control circuit (22) and a transmitting terminal communicator (23);
in the wireless charging process, the receiving end electrode plate (11) and the transmitting end electrode plate (21) are located in a working range, and the working range refers to a range in which the receiving end electrode plate (11) and the transmitting end electrode plate (21) can form capacitance.
2. The unmanned aerial vehicle wireless charging system of claim 1,
the bearing surface (31) covers the emitting end polar plate (21), and at least the bearing surface (31) in the area of the emitting end polar plate (21) is an insulating dielectric layer.
3. The unmanned aerial vehicle wireless charging system of claim 1,
the receiving end polar plate (11) is arranged at the bottom of a landing frame (41) of the unmanned aerial vehicle (4) and faces the direction of the charging platform (3);
and an insulating dielectric layer covers the receiving end polar plate (11).
4. The unmanned aerial vehicle wireless charging system of claim 1,
the receiving end polar plate (11) and the transmitting end polar plate (21) are both cylindrical, one of the two is sleeved in the other, and a gap is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder.
5. The unmanned aerial vehicle wireless charging system of claim 1,
the receiving end polar plate (11) and the transmitting end polar plate (21) are both composed of a plurality of polar plate arrays.
6. The unmanned aerial vehicle wireless charging system of claim 1,
the receiving end polar plate (11) is divided into two parts, namely a first central part and a first outer ring part arranged around the first central part;
the transmitting end polar plate (21) is divided into two parts, namely a second central part and a second outer ring part arranged around the second central part;
during wireless charging, the first center part and the second center part are in a working range of forming a capacitor; the first outer ring portion and the second outer ring portion are within an operating range in which a capacitance is formed.
7. The unmanned aerial vehicle wireless charging system of claim 1,
the receiving-end control circuit (12) includes: the device comprises a receiving end compensation circuit (121), a receiving end rectifying circuit (122), a receiving end filtering circuit (123) and a receiving end controller (124).
8. The unmanned aerial vehicle wireless charging system of claim 1,
the transmitting end control circuit (22) comprises a transmitting end compensation circuit (221), a transmitting end inverter circuit (222) and a transmitting end controller (223);
the transmitting end control circuit (22) is communicated with a power supply.
9. The unmanned aerial vehicle wireless charging system of claim 8,
the transmitting end control circuit (22) further comprises a transmitting end rectifying circuit (224) and a transmitting end filtering circuit (225).
10. The unmanned aerial vehicle wireless charging system of claim 1,
the transmitting end plate (21) has a plurality of groups, and at least one group of the transmitting end plate (21) is selectively operated by controlling the switch (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320996.XA CN111559260A (en) | 2020-04-21 | 2020-04-21 | Unmanned aerial vehicle wireless charging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320996.XA CN111559260A (en) | 2020-04-21 | 2020-04-21 | Unmanned aerial vehicle wireless charging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693334A (en) * | 2021-01-13 | 2021-04-23 | 重庆华创智能科技研究院有限公司 | Wireless charging control method and system based on unmanned aerial vehicle airport |
| CN114884183A (en) * | 2022-07-12 | 2022-08-09 | 合肥有感科技有限责任公司 | Electric equipment charging system |
-
2020
- 2020-04-21 CN CN202010320996.XA patent/CN111559260A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693334A (en) * | 2021-01-13 | 2021-04-23 | 重庆华创智能科技研究院有限公司 | Wireless charging control method and system based on unmanned aerial vehicle airport |
| CN114884183A (en) * | 2022-07-12 | 2022-08-09 | 合肥有感科技有限责任公司 | Electric equipment charging system |
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