A wireless charging transmitting device, a wireless charging device, and a drone system

Abstract

The present invention belongs to the technical field of wireless charging devices, and particularly relates to a wireless charging transmitting device, a wireless charging device, and a drone system. The wireless charging transmitting device includes: a carrier platform surrounded in a circle; a transmitting coil group disposed on the inner surface of the carrier platform, the transmitting coil group includes at least two layers, each layer of the transmitting coil group includes multiple pairs of opposingly arranged transmitting coils connected in series through connection lines, the transmitting coils in the same layer are spaced apart from each other, and the transmitting coils in different layers are partially stacked with each other to eliminate coupling blind spots. When the charging load stops in the spatial area in the middle of the carrier platform, since the coupling blind spots between the receiving coil and the transmitting coil on the charging load have been eliminated, the receiving coil and the transmitting coil can ensure charging the charging load with the maximum charging efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless charging devices, and particularly relates to a wireless charging transmitting device, a wireless charging device, and a drone system. Background Art

[0002] Unmanned aerial vehicles, abbreviated as drones, have the advantages of being flexible, responsive, capable of flying without a pilot, having low operating requirements, and not requiring a runway or other auxiliary equipment for takeoff. By carrying various types of sensors, drones can achieve real-time image transmission, environmental detection functions, etc., and their application scope has been extended to three major fields: military, scientific research, and civilian use.

[0003] However, the battery power carried by drones is limited. To solve the problem of insufficient endurance of drones, it is necessary to charge the drones. Currently, there are mainly two ways to charge drones: wired charging and wireless charging. The wired charging method requires someone to intervene in the process of plugging and unplugging the drone's charging head, or use a robot for precise battery replacement, but the technical requirements and cost requirements of this method are very high. The wireless charging method mainly stops the drone on the charging platform, and then realizes wireless charging through the mutual coupling of the transmitting coil and the receiving coil. However, the transmitting coil often has a coupling blind area, and the positioning accuracy of the drone is limited. When the drone's positioning goes wrong and it stops in the coupling blind area of the transmitting coil, the coupling efficiency between the transmitting coil and the receiving coil will be low, resulting in low charging efficiency of the drone. Summary of the Invention

[0004] The present invention provides a wireless charging transmitting device, aiming to solve the technical problem that the transmitting coil often has a coupling blind area, and when the drone stops in the coupling blind area of the transmitting coil, the coupling efficiency between the transmitting coil and the receiving coil will be low, resulting in low charging efficiency of the drone.

[0005] The present invention is implemented as follows. A wireless charging transmitting device is provided, including:

[0006] A carrier platform surrounded in a circle;

[0007] A transmitting coil group provided on the inner surface of the carrier platform, the transmitting coil group includes at least two layers, and each layer of the transmitting coil group contains multiple pairs of transmitting coils symmetrically arranged with respect to the center point of the carrier platform and connected in series through connecting wires. The transmitting coils in the same layer are spaced apart from each other, and the transmitting coils in different layers are partially stacked with each other to eliminate the coupling blind area.

[0008] Furthermore, the number of transmitting coils included in each layer of the transmitting coil group satisfies the following formula:

[0009]

[0010] Wherein, A is the number of transmitting coils included in each layer of transmitting coil group, θ is the maximum included angle formed by the connection lines between the center point of the bearing platform and the two ends of the transmitting coil. When A is a decimal, it is necessary to round down to an integer.

[0011] Furthermore, a magnetic conductive member is disposed around the outside of the transmitting coil, or a magnetic conductive member is disposed in a circle around the outermost transmitting coil.

[0012] Furthermore, the bearing platform is set to be circular, and the transmitting coil is set to be annular.

[0013] Furthermore, the bearing platform is set to be polygonal, and the transmitting coil is set to be annular.

[0014] The present invention also provides a wireless charging device, including:

[0015] A wireless charging receiving device, including receiving coils respectively disposed on opposite sides of the charging load and a receiving controller connected to the receiving coils;

[0016] The wireless charging transmitting device as described above, and the wireless charging transmitting device further includes a transmitting controller connected to the transmitting coil.

[0017] Furthermore, the length of the transmitting coil is equal to or greater than the length of the receiving coil, and the height of the transmitting coil is equal to or greater than the height of the receiving coil.

[0018] Furthermore, the central position of the transmitting coil is horizontally flush with the central position of the receiving coil.

[0019] Furthermore, the wireless charging device further includes a moving platform disposed below the bearing platform and a driving mechanism drivingly connected to the moving platform. Under the driving action of the driving mechanism, the moving platform can drive the charging load to move.

[0020] The present invention also provides an unmanned aerial vehicle (UAV) system, including:

[0021] An unmanned aerial vehicle;

[0022] The wireless charging device as described above, and the wireless charging receiving device is disposed on both sides of the unmanned aerial vehicle.

[0023] The beneficial effects of the present invention are as follows. The wireless charging transmitting device includes a carrier and a transmitting coil group. The transmitting coil group includes at least two layers. Each layer of the transmitting coil group contains multiple pairs of transmitting coils that are oppositely arranged and connected in series by connecting lines. The transmitting coils in the same layer are arranged at intervals, and the transmitting coils in different layers are partially stacked with each other. When the charging load stops in the spatial area in the middle of the carrier, since the coupling blind area between the receiving coil and the transmitting coil on the charging load has been eliminated, the receiving coil and the transmitting coil can ensure charging the charging load with the maximum charging efficiency. Description of the Drawings

[0024] Figure 1 is a schematic diagram of a drone system provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the drone system omitting the carrier provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the maximum included angle θ formed by the connection lines between the center point of the carrier and both ends of the transmitting coil provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of the first-layer transmitting coil group provided by an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of the wireless charging transmitting device provided by the present invention;

[0029] Figure 6 is a schematic diagram of the first-layer transmitting coil group provided by another embodiment of the present invention;

[0030] Figure 7 is a schematic diagram of the second-layer transmitting coil group provided by another embodiment of the present invention;

[0031] Figure 8 is a schematic diagram of the wireless charging transmitting device provided by another embodiment of the present invention;

[0032] Figure 9 is a schematic diagram of the first-layer transmitting coil group provided by still another embodiment of the present invention;

[0033] Figure 10 is a schematic diagram of the second-layer transmitting coil group provided by still another embodiment of the present invention;

[0034] Figure 11 is a schematic diagram of the wireless charging transmitting device provided by still another embodiment of the present invention. Detailed Embodiments

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] In the present invention, the wireless charging transmitting device includes a carrier platform 1 and a transmitting coil group 2. The transmitting coil group 2 includes at least two layers. Each layer of the transmitting coil group 2 includes multiple pairs of transmitting coils that are oppositely arranged and connected in series by a connecting wire 23. The transmitting coils in the same layer are spaced apart from each other, and the transmitting coils in different layers are partially stacked on each other; when the charging load 4 stops in the space area in the middle of the carrier platform 1, since the coupling blind area between the receiving coil 31 on the charging load 4 and the transmitting coil has been eliminated, the receiving coil 31 and the transmitting coil can ensure charging the charging load 4 with the maximum charging efficiency.

[0037] Embodiment 1

[0038] Reference Figure 1 And Figure 2 , Embodiment 1 of the present invention provides a wireless charging transmitting device, including:

[0039] A carrier platform 1 that encloses a circle;

[0040] A transmitting coil group 2 provided on the inner surface of the carrier platform 1. The transmitting coil group 2 includes at least two layers. Each layer of the transmitting coil group 2 includes multiple pairs of transmitting coils that are symmetrically arranged with respect to the center point of the carrier platform 1 and connected in series by a connecting wire 23. The transmitting coils in the same layer are spaced apart from each other, and the transmitting coils in different layers are partially stacked on each other to eliminate the coupling blind area.

[0041] The carrier platform 1 can be continuously enclosed in a circle or enclosed in a circle at intervals, as long as it can achieve the function of carrying the transmitting coil group 2.

[0042] When the carrier platform 1 is continuously enclosed in a circle, the transmitting coils of one layer of the transmitting coil group 2 are attached to the inner surface of the carrier platform 1, and the transmitting coils of another layer of the transmitting coil group 2 are partially attached to the transmitting coils that have been attached to the inner surface of the carrier platform 1. The transmitting coils of the remaining layers of the transmitting coil group 2 are attached to the transmitting coils that have been fixed. As long as one layer of the transmitting coil group 2 has been fixed on the carrier platform 1, the remaining layers of the transmitting coil group 2 can also be fixed.

[0043] When the carrying platform 1 is spaced apart in a circle, the transmitting coils of the transmitting coil group 2 in one layer can also be attached to the inner surface of the carrying platform 1 by striding over or avoiding the spaced positions. The transmitting coils of the transmitting coil group 2 in another layer are partially attached to the transmitting coils already attached to the inner surface of the carrying platform 1, and the transmitting coils of the transmitting coil group 2 in the remaining layers are attached to the already fixed transmitting coils. As long as the transmitting coil group 2 in one layer is fixed on the carrying platform 1, the transmitting coil groups 2 in the remaining layers can also be fixed.

[0044] The transmitting coil group 2 includes at least two layers, such as two layers, three layers, four layers, etc., which can be determined according to the actual charging situation.

[0045] Each layer of the transmitting coil group 2 contains multiple pairs of transmitting coils symmetrically arranged with respect to the center point of the carrying platform 1 and connected in series by connecting lines 23. The transmitting coils in the same layer are spaced apart from each other, and the transmitting coils in another layer can be arranged at these spaced positions, and the transmitting coils in different layers are partially stacked with each other, so that the transmitting coils in different layers are staggered from each other.

[0046] Reference Figure 1 , for example, the transmitting coil group 2 is provided with two layers. The first-layer transmitting coil group 21 is arranged inside, in the space area near the middle of the carrying platform 1, and the second-layer transmitting coil group 22 is arranged outside, attached to the inner surface of the carrying platform 1. The transmitting coils of the first-layer transmitting coil group 21 are spaced apart from each other, the transmitting coils of the second-layer transmitting coil group 22 are spaced apart from each other, the transmitting coils of the first-layer transmitting coil group 21 are arranged at the spaced positions of the transmitting coils of the second-layer transmitting coil group 22, and the transmitting coils of the first-layer transmitting coil group 21 and the transmitting coils of the second-layer transmitting coil group 22 are partially stacked with each other, that is, the transmitting coils of the first-layer transmitting coil group 21 and the transmitting coils of the second-layer transmitting coil group 22 are staggered from each other. It should be noted that the area of partial stacking of the transmitting coils is less than half of the area of the transmitting coils.

[0047] The number of transmitting coils in each layer of the transmitting coil group 2 is the same, and the sizes of all the transmitting coils are also the same, and they can be mutually adapted to the receiving coil 31 on the charging load 4. Moreover, according to the inductance requirements of different transmitting coils, a loosely wound transmitting coil or a tightly wound transmitting coil can be selected.

[0048] Through the mutual cooperation of the respective transmitting coils, even if there are corners on the carrying platform 1, the transmitting coils can still form a complete circle, so as to achieve the purpose of eliminating the coupling blind area. When the charging load 4 stops in the space area in the middle of the carrying platform 1, since the coupling blind area between the receiving coil 31 on the charging load 4 and the transmitting coils has been eliminated, the receiving coil 31 and the transmitting coils can ensure charging the charging load 4 with the maximum charging efficiency.

[0049] It is worth mentioning that when the charging load 4 stops in the space area in the middle of the carrier 1, due to multiple sets of transmitting coil groups being provided, and each set of transmitting coil groups having multiple pairs of symmetrically arranged transmitting coils, it is ensured that a pair of symmetrically arranged transmitting coils and receiving coils can be found to be relatively aligned, thus ensuring the coupling effect between the transmitting coil and the receiving coil. In this way, the position where the drone can land can have a deviation (as long as it is within the range surrounded by the transmitting coils) and can be parked in any direction. Furthermore, after judging the charging efficiency of each transmitting coil, the two opposing transmitting coils with the highest charging efficiency are selected for operation, and the remaining transmitting coils do not operate. This can not only ensure the best charging efficiency but also save resources and avoid unnecessary operation of the transmitting coils.

[0050] Embodiment 2

[0051] Reference Figure 3 , on the basis of Embodiment 1, the number of transmitting coils included in each layer of the transmitting coil group 2 in this Embodiment 2 satisfies the following formula:

[0052]

[0053] Wherein, A is the number of transmitting coils included in each layer of the transmitting coil group 2, and θ is the maximum included angle formed by the connection line between the center point of the carrier 1 and the two ends of the transmitting coil. When this connection line passes through the two ends of the receiving coil 31 at the same time, the center of the transmitting coil corresponds to the center of the receiving coil 31, and this is the optimal charging position at this time.

[0054] It should be noted that when A is a decimal, it needs to be rounded down to an integer. Of course, the transmitting coil can also be replaced, and the length of the transmitting coil can be appropriately increased or decreased to obtain an integer A.

[0055] In addition, since a single layer of the transmitting coil group 2 needs to accommodate two pairs or more of transmitting coils, θ is less than 90°.

[0056] By setting the number of transmitting coils, when the charging load 4 stops in the space area in the middle of the carrier 1, charging can be achieved with the maximum charging efficiency.

[0057] Embodiment 3

[0058] On the basis of Embodiment 1, a magnetic conductive member is surrounded outside the transmitting coil in this Embodiment 3, or a magnetic conductive member, such as a magnetic core or soft magnetic material, etc., is surrounded around the outermost transmitting coil. By setting the magnetic conductive member, the coupling coefficient of the transmitting coil can be improved to further improve the charging efficiency.

[0059] For a drone, the wireless charging receiving device of its traditional wireless charging device is in a relatively open environment, and a magnetic conductive member needs to be added to reduce magnetic leakage. In the embodiment of the present invention, the wireless charging transmitting device confines the magnetic field in the symmetric transmitting coil with the magnetic conductive member and forms an induced current through the receiving coil installed on the drone. Only the transmitting coil needs to be provided with the magnetic conductive member, and the receiving coil does not need to be provided with the magnetic conductive member, thereby greatly reducing the load of the drone.

[0060] Embodiment 4

[0061] Based on Embodiments 2 and 3, the bearing platform 1 in this Embodiment 4 is set to be circular, and the transmitting coil is set to be annular.

[0062] Among them, the number of transmitting coils in both the first-layer transmitting coil group 21 and the second-layer transmitting coil group 22 is 4. Refer to Figure 4 , each transmitting coil in the first-layer transmitting coil group 21 is arranged at intervals, and the opposing transmitting coils are connected together by a connecting wire 23. Refer to Figure 5 , each transmitting coil in the first-layer transmitting coil group 21 is arranged at the interval position of each transmitting coil in the second-layer transmitting coil group 22, and each transmitting coil in the first-layer transmitting coil group 21 and each transmitting coil in the second-layer transmitting coil group 22 are partially stacked with each other, that is, each transmitting coil in the first-layer transmitting coil group 21 and each transmitting coil in the second-layer transmitting coil group 22 are staggered from each other. Multiple annular transmitting coils surround the inner surface of the bearing platform 1 in a circle, which can eliminate the coupling blind area, thereby ensuring excellent charging efficiency.

[0063] Alternatively, the bearing platform 1 is set to be polygonal, and the transmitting coil is set to be annular.

[0064] Refer to Figure 6 , Figure 7 and Figure 8 , the bearing platform 1 is a regular hexagon, and the transmitting coil is annular. Among them, the number of both the first-layer transmitting coil group 21 and the second-layer transmitting coil group 22 is 6. Refer to Figure 6 , each transmitting coil in the first-layer transmitting coil group 21 is arranged at intervals, and the opposing transmitting coils are connected together by a connecting wire 23. Refer to Figure 7 , each transmitting coil in the second-layer transmitting coil group 22 is arranged at intervals, and the opposing transmitting coils are connected together by a connecting wire 23. Refer to Figure 8, each transmitting coil of the first-layer transmitting coil group 21 is arranged at the interval position of each transmitting coil of the second-layer transmitting coil group 22, and each transmitting coil of the first-layer transmitting coil group 21 and each transmitting coil of the second-layer transmitting coil group 22 are partially stacked with each other, that is, each transmitting coil of the first-layer transmitting coil group 21 and each transmitting coil of the second-layer transmitting coil group 22 are staggered from each other. Even if there are corners on the carrier 1, multiple annular transmitting coils can still surround the inner surface of the carrier 1 in a circle, which can eliminate the coupling blind area, thereby ensuring excellent charging efficiency.

[0065] Reference Figure 9 、 Figure 10 And Figure 11 , the carrier 1 is a regular octagon, and the transmitting coil is annular. Among them, the number of both the first-layer transmitting coil group 21 and the second-layer transmitting coil group 22 is 8. Reference Figure 9 , each transmitting coil of the first-layer transmitting coil group 21 is arranged at intervals, and the opposing transmitting coils are connected together by a connecting line 23. Reference Figure 10 , each transmitting coil of the second-layer transmitting coil group 22 is arranged at intervals, and the opposing transmitting coils are connected together by a connecting line 23. Reference Figure 11 , each transmitting coil of the first-layer transmitting coil group 21 is arranged at the interval position of each transmitting coil of the second-layer transmitting coil group 22, and each transmitting coil of the first-layer transmitting coil group 21 and each transmitting coil of the second-layer transmitting coil group 22 are partially stacked with each other, that is, each transmitting coil of the first-layer transmitting coil group 21 and each transmitting coil of the second-layer transmitting coil group 22 are staggered from each other. Even if there are corners on the carrier 1, multiple annular transmitting coils can still surround the inner surface of the carrier 1 in a circle, which can eliminate the coupling blind area, thereby ensuring excellent charging efficiency.

[0066] Of course, the transmitting coil can also be other types. Generally speaking, the transmitting coil can be planar with a flat surface, or curved with a curved surface, or bent with a fold angle on its surface. There is no limitation here as long as its function can be realized.

[0067] Embodiment Five

[0068] Reference Figure 1 And Figure 2 , this Embodiment Five provides a wireless charging device, including:

[0069] A wireless charging receiving device, including receiving coils 31 respectively arranged on opposite sides of the charging load 4 and a receiving controller connected to the receiving coils 31. The receiving coils 31 can also be connected together by a connecting line 23;

[0070] The wireless charging transmitting device as described in Embodiments 1 to 4, the wireless charging transmitting device further includes a transmitting controller connected to the transmitting coil.

[0071] One receiving controller may be provided, which is respectively connected to the receiving coil 31, so that the receiving controller can control all the receiving coils 31. Of course, other numbers of receiving controllers may also be provided, which will not be elaborated here one by one. One transmitting controller may be provided, which is connected to one of the transmitting coils. Since the transmitting coils are connected to each other, the transmitting controller can control all the transmitting coils. Of course, other numbers of transmitting controllers may also be provided, which will not be elaborated here one by one.

[0072] When the charging load 4 stops in the space area in the middle of the carrying platform 1, the receiving controller controls the receiving coil 31 to work, and the transmitting controller controls the transmitting coil to work. The two opposing receiving coils 31 are respectively coupled with their corresponding opposing two transmitting coils. Since the coupling blind area between the receiving coil 31 and the transmitting coil on the charging load 4 has been eliminated, the receiving coil 31 and the transmitting coil can ensure charging the charging load 4 with the maximum charging efficiency.

[0073] It is worth mentioning that when the charging load 4 stops in the space area in the middle of the carrying platform 1, the charging efficiency of each transmitting coil can be judged, so as to select the two opposing transmitting coils with the highest charging efficiency to work with the receiving coil 31 respectively, and the remaining transmitting coils do not work. This can not only ensure the best charging efficiency, but also save resources and avoid unnecessary work of the transmitting coils.

[0074] Embodiment 6

[0075] On the basis of Embodiment 5, in this Embodiment 6, the length of the transmitting coil is equal to or greater than the length of the receiving coil 31, and the height of the transmitting coil is equal to or greater than the height of the receiving coil 31. In one embodiment, the length of the transmitting coil is 1.3 times the length of the receiving coil 13, and the height of the transmitting coil is 1.3 times the height of the receiving coil. Of course, with the change of the distance between the transmitting and receiving coils, this multiple value is dynamically changed, which will not be elaborated here one by one.

[0076] In this embodiment, the outer area of the transmitting coil is equal to or greater than the outer area of the receiving coil 31. The above-mentioned outer area refers to the winding area of the transmitting coil and the winding area of the receiving coil 31. The inner area of the transmitting coil is equal to or less than the inner area of the receiving coil 31. The above-mentioned inner area refers to the inner hollow area of the transmitting coil and the inner hollow area of the receiving coil 31.

[0077] Furthermore, the central position of the transmitting coil should be horizontally flush with the central position of the receiving coil 1.

[0078] Through the above settings of the transmitting coil and the receiving coil 31, the charging efficiency between the transmitting coil and the receiving coil 31 can be further improved. It should be noted that when the wireless charging transmitting device is applied to a drone system, the size design of the wireless charging transmitting device is based on the size of the receiving coil 31 of the drone and the parking accuracy of the drone.

[0079] Embodiment Seven

[0080] Based on Embodiments Five and Six, the wireless charging device of this Embodiment Seven further includes a moving platform disposed below the carrier platform 1 and a driving mechanism drivingly connected to the moving platform. Under the driving action of the driving mechanism, the moving platform can drive the charging load 4 to move.

[0081] In the embodiments of the present invention, the driving mechanism includes a plurality of linear motors disposed on the side of the moving platform. Through the pushing action of the driving shafts of the linear motors, the moving plate can be driven to move in different directions, that is, the charging load 4 is driven to move in different directions. Further, the driving mechanism further includes a rotary motor disposed below the moving platform. The rotary motor can drive the moving plate to rotate, that is, drive the charging load 4 to rotate, so as to change the orientation of the charging load 4.

[0082] When the charging load 4 stops in the space area in the middle of the carrier platform 1, the linear motor drives the moving platform to move, and the moving platform then drives the charging load 4 to move to the exact center position of the carrier platform 1. Subsequently, the rotary motor drives the moving plate to rotate, and the moving platform then drives the charging load 4 to rotate, so that the receiving coils 31 on both sides of the charging load 4 are respectively oriented towards a pair of opposing transmitting coils. The transmitting controller then selects and controls the transmitting coil with the highest charging efficiency to work, and the remaining transmitting coils do not work. The receiving controller controls the receiving coil 31 to start working, so that the transmitting coil and the receiving coil 31 are coupled to each other, and charging work is carried out with the best charging efficiency.

[0083] Embodiment Eight

[0084] Reference Figure 1 and Figure 2 , this Embodiment Eight provides a drone system, including:

[0085] A drone;

[0086] The wireless charging device as described in Embodiments Five to Seven, wherein the wireless charging receiving device is arranged on both sides of the drone. Among them, the minimum size of the transmitting coil depends on the parking accuracy of the drone. Theoretically, the smaller the transmitting coil, the closer it is to the receiving coil 31, which is more beneficial to the production and manufacturing of the wireless charging device. The size of the receiving coil 31 depends on the distance between the two side brackets of the drone and the size of the area on the brackets where the coil can be wound. After determining the size of the receiving coil 31, the size of the transmitting coil can be determined adaptively.

[0087] When the drone stops in the space area in the middle of the carrying platform 1, the receiving controller controls the receiving coil 31 to work, and the transmitting controller controls the transmitting coil to work. The two opposing receiving coils 31 are respectively coupled with their corresponding two opposing transmitting coils. Since the coupling blind area between the receiving coil 31 and the transmitting coil on the drone has been eliminated, the receiving coil 31 and the transmitting coil can ensure charging the drone with the maximum charging efficiency.

[0088] It is worth mentioning that when the drone stops in the space area in the middle of the carrying platform 1, the charging efficiency of each transmitting coil can be judged, so as to select the two opposing transmitting coils with the highest charging efficiency to work with the receiving coil 31 respectively, and the remaining transmitting coils do not work. This can not only ensure the best charging efficiency, but also save resources and avoid unnecessary work of the transmitting coils.

[0089] In the present invention, the wireless charging transmitting device includes a carrying platform 1 and a transmitting coil group 2. The transmitting coil group 2 includes at least two layers. Each layer of the transmitting coil group 2 contains multiple pairs of opposingly arranged transmitting coils connected in series by connecting wires 23. The transmitting coils in the same layer are arranged at intervals, and the transmitting coils in different layers are partially stacked with each other. When the charging load 4 stops in the space area in the middle of the carrying platform 1, since the coupling blind area between the receiving coil 31 on the charging load 4 and the transmitting coil has been eliminated, the receiving coil 31 and the transmitting coil can ensure charging the charging load 4 with the maximum charging efficiency.

[0090] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wireless charging transmitting device, characterized in that, Comprising: A carrier platform that forms a circle; A transmitting coil group disposed on the inner surface of the carrier platform, the transmitting coil group including at least two layers, each layer of the transmitting coil group comprising multiple pairs of transmitting coils symmetrically arranged with respect to the center point of the carrier platform and connected in series by connection lines, the transmitting coils in the same layer being spaced apart from each other, and the transmitting coils in different layers being partially stacked with respect to each other to eliminate coupling blind spots; the number of transmitting coils in each layer of the transmitting coil group being the same. The number of transmitting coils comprised in each layer of the transmitting coil group satisfies the following formula: Wherein, A is the number of transmitting coils comprised in each layer of the transmitting coil group, θ is the maximum angle formed by the connection lines between the center point of the carrier platform and the two ends of the transmitting coil, and when A is a decimal, it needs to be rounded down to an integer. A magnetic conductive member is disposed outside the transmitting coil, or a magnetic conductive member surrounds the outermost transmitting coil in a circle.

2. The wireless charging transmitting device according to claim 1, wherein The carrier platform is provided as circular, and the transmitting coil is provided as annular.

3. The wireless charging transmitting device according to claim 1, characterized in that, The carrier platform is provided as polygonal, and the transmitting coil is provided as annular.

4. A wireless charging device, characterized in that, Comprising: A wireless charging receiving device, including receiving coils respectively disposed on opposite sides of a charging load and a receiving controller connected to the receiving coils; The wireless charging transmitting device according to any one of claims 1 to 3, the wireless charging transmitting device further including a transmitting controller connected to the transmitting coil.

5. The wireless charging device according to claim 4, characterized in that, The length of the transmitting coil is equal to or greater than the length of the receiving coil, and the height of the transmitting coil is equal to or greater than the height of the receiving coil.

6. The wireless charging device according to claim 4, characterized in that, The central position of the transmitting coil is horizontally flush with the central position of the receiving coil.

7. The wireless charging device according to claim 4, wherein The wireless charging device further includes a mobile platform disposed below the carrier platform and a driving mechanism drivingly connected to the mobile platform, and under the driving action of the driving mechanism, the mobile platform can drive the charging load to move.

8. A drone system, characterized in that, Comprising: An unmanned aerial vehicle; The wireless charging device according to any one of claims 4 to 7, the wireless charging receiving device being disposed on both sides of the unmanned aerial vehicle.

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