Omnidirectional wireless power transmission device

Abstract

The invention discloses an omnidirectional wireless electric energy transmission device, and belongs to the technical field of wireless electric energy transmission. The device comprises a regular octahedron framework and a transmitting coil which is continuously and unidirectionally wound along the edge of the regular octahedron framework, and the winding directions of adjacent triangular frameworks are opposite so as to generate an enhanced magnetic field which is matched with a first resonance compensation network and a high-frequency power supply system to work. A receiving end adopts three groups of coil units which are orthogonally arranged in the same plane and are mutually isolated to form a receiving coil, and each group is connected with an independent second resonance compensation network to form a resonance rectification branch. According to the structure, an omnidirectional uniform magnetic field is generated through unique regular octahedron coil arrangement, so that receiving equipment can be efficiently charged at any angle and position in a large range, and the structure has high tolerance to rotation and offset. The planar orthogonal receiving coil can capture more magnetic flux in a three-dimensional space, the transmission efficiency is improved, cross coupling is effectively restrained, and meanwhile the planar orthogonal receiving coil can be conveniently integrated in a mobile phone, a computer and other devices through the flat design.

Description

Technical Field

[0001] This invention relates to the field of wireless power transmission technology, and in particular to an omnidirectional wireless power transmission device. Background Technology

[0002] Wireless power transfer is a technology that uses air as a medium to transfer energy to electrical appliances through electric fields, magnetic fields, sound waves, etc. It's a power transmission mode that achieves power transfer between a power source and an appliance through a non-direct connection. Compared to traditional methods of transmitting electrical energy using power lines, wireless power transfer offers significant improvements in both security and flexibility, and is considered a major advancement in the field of energy transmission.

[0003] However, the current development of wireless power transfer technology has reached a bottleneck, facing a series of pressing problems: while existing wireless charging devices avoid the use of charging cables, the device must be placed in a designated location for wireless power transfer to occur; when portable electronic devices such as smartphones, smartwatches, and Bluetooth headsets are wirelessly charged, if the device is misaligned with the charging location, the power transfer efficiency will decrease, or even the device will fail to function properly. This not only limits the spatial flexibility of wireless power transfer but also makes it difficult to guarantee the power safety and real-time power supply of devices in special environments, such as underwater exploration, drones, or implantable medical electronics. Omnidirectional wireless power transfer technology can better meet the power needs of these devices, possessing the characteristics of omnidirectional operation, wide range, and high degree of freedom.

[0004] Omnidirectional wireless power transfer technology can effectively overcome the shortcomings of existing wireless power transfer technologies, such as limited transmission angle, short transmission range, and weak anti-misalignment capability. It is also one of the important directions for the future development of wireless power transfer technology. Currently, most research on improving the stability of transmission in arbitrary space is limited to the two-dimensional plane, and research results on flexible and stable transmission in three-dimensional space have many shortcomings: (a) The prior art has proposed a non-coaxial domino resonant coil array and a self-rotating transmitting coil device. Although it achieves stable power transmission in multiple directions, the large number of relay coils and the complex structure limit its flexibility and controllability. Moreover, it fails to fundamentally improve the transmission stability in any direction. Under the condition that the picking mechanism rotates at any angle, the output fluctuation is large, which increases the difficulty of control.

[0005] (ii) The prior art proposes a three-dimensional orthogonal transmitting coil and a reconfigurable receiving device, which automatically adjusts the system power by changing the number of turns of the receiving coil through a switch, so as to maintain the output within the target range when the distance, attitude, load and input change. However, it has the problems of too many switching devices and high system control complexity.

[0006] (III) A novel transmitter structure with high efficiency and low leakage flux has been proposed in the prior art. This structure consists of three orthogonally placed square coils and adopts a self-decoupling and reconfiguration method, so that the system efficiency fluctuation rate is only 4.1% within a certain range of angular misalignment. However, the disadvantage is that the working area is limited to a single quadrant rather than the whole domain and omnidirectional. Furthermore, the introduction of ferrite, decoupling coils and detection control results in high control complexity and large size.

[0007] (iv) In the prior art, a three-dimensional omnidirectional WPT device with a three-pole planar structure is proposed. The transmitting end is composed of two sets of figure-eight bipolar coils and monopolar circular coils that are naturally decoupled. By modulating the current vector, the synthetic magnetic field vector is always pointed to the receiving coil, so that it can maintain a relatively stable output efficiency under arbitrary rotation angle. However, the "omnidirectional" of this device is mainly for angle mismatch and does not have position mismatch capability. Moreover, the current modulation is an open-loop control, which will cause output fluctuation due to structural parameter deviation and gyroscope angle measurement error.

[0008] Therefore, the key to improving the performance of wireless power transmission systems lies in how to reduce system size and achieve omnidirectional power transmission while ensuring stable power transmission. Summary of the Invention

[0009] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes an omnidirectional wireless power transmission device.

[0010] The technical solution of the present invention is as follows: An omnidirectional wireless power transmission device, comprising: An octahedral framework with twelve edges, forming eight vertically distributed triangular frames; A conductor, starting from the endpoint of any edge, is continuously wound unidirectionally along the edge of each triangular frame to form a transmitting coil. The conductors of adjacent triangular frames are wound in opposite directions to form magnetic fields in opposite directions, which are used to enhance the magnetic field. A first resonant compensation network is connected to the transmitting coil; A high-frequency power supply system is connected to the first resonant compensation network; Three sets of coil units are arranged orthogonally in pairs in the same plane, and each set of coil units is electrically isolated from each other to form a receiving coil; Multiple second resonant compensation networks are respectively connected to the receiving coil to form their own independent resonant rectifier branches.

[0011] In one possible technical solution, the transmitting coil further forms in-plane sub-coils with opposite directions on the triangular faces of adjacent triangular frames of the regular octahedral skeleton, and the in-plane sub-coils are distributed around the geometric center of the regular octahedral skeleton.

[0012] In one possible technical solution, the number of transmitting coils is one turn or multiple turns; When the number of turns of the transmitting coil is multi-turn, the number of turns of the transmitting coil on each triangular frame is the same, and they are arranged around the center point of the triangle.

[0013] In one possible technical solution, the spacing between adjacent transmitting coils is kept equal on the same triangular frame, and each transmitting coil is wound along the edge, forming a 60-degree angle with the horizontal plane.

[0014] In one possible technical solution, the coil unit further includes: The first coil unit has a rectangular structure. The second coil unit is located inside the first coil unit and is perpendicular to both sides of the first coil unit; The third coil unit is located within the first coil unit and is perpendicular to the second coil unit, forming a pairwise orthogonal structure in the same plane.

[0015] In one possible technical solution, the number of both the second coil unit and the third coil unit is two.

[0016] In one possible technical solution, the octahedral skeleton is further described as an insulated hollow structure, which facilitates the arrangement of high-frequency power modules, compensation network devices, and connection terminals inside or at the bottom of the octahedral skeleton, thereby improving structural integration and assembly consistency.

[0017] In one possible technical solution, each group of coil units is further configured with a ferrite core.

[0018] In one possible technical solution, the high-frequency power supply system further includes: The DC power supply module is used to convert the input low-frequency AC power into stable DC power after rectification and filtering. A full-bridge inverter circuit is connected to the DC power supply module. This circuit uses four switching transistors to alternately conduct at high frequency, converting DC power back into the required high-frequency AC power output. These two parts work together to achieve efficient and stable high-frequency power conversion and supply.

[0019] In one possible technical solution, the DC output terminal of the resonant rectifier branch is further connected to the load in series, parallel, or a combination of series and parallel connections.

[0020] The omnidirectional wireless power transmission device according to the present invention has the following advantages compared with the prior art: The unique octahedral structure and unidirectional winding method of this invention can generate an omnidirectional uniform magnetic field strength, thereby enabling the charging device to charge at any angle within a large range, and has a high tolerance for rotation angle and offset distance.

[0021] By using a planar receiving coil formed by three sets of mutually orthogonal and independent coils, the transmitted magnetic field can be effectively received from multiple directions in three-dimensional space, capturing more magnetic flux, thereby improving the transmission efficiency of the system and solving the problem of low efficiency of omnidirectional wireless power transfer (WPT) and interference from cross-coupling.

[0022] By integrating the receiving coil into the same plane to form a flat structure, its size is greatly reduced, making it easy to install in objects such as mobile phones, computers, desktops, and walls.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the octahedral skeleton of the omnidirectional wireless power transmission device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the single-turn transmitting coil structure of the omnidirectional wireless power transmission device according to an embodiment of the present invention; Figure 3 A schematic diagram of the continuous winding path of the integrated coil for the transmitting coil; Figure 4 A simulation diagram illustrating the uniformity of the magnetic field on the outer surface of the sphere using the transmitting coil; Figure 5 This is a simulation diagram showing the magnitude of the magnetic flux density of the transmitting coil on the reference equivalent surface. Figure 6 A simulation diagram of the magnetic field line vector distribution of the transmitting coil; Figure 7 This is a schematic diagram of the coil unit structure of the omnidirectional wireless power transmission device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the ferrite core structure according to an embodiment of the present invention; Figure 9 A schematic diagram showing the receiving coil moving in a circular motion around a multi-turn octahedral transmitting coil; Figure 10 The load receiving voltage curve is shown as the receiving coil moves in a circle around the multi-turn octahedral transmitting coil.

[0026] Figure label: 1. Regular octahedral skeleton, 2. Wire, 3. Coil unit, 31. First coil unit, 32. Second coil unit, 33. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, it may include a series of steps or units, or optionally, steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0031] The accompanying drawings show only the portions relevant to this application, not all of them. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations may be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0032] The terms “component,” “module,” “system,” “unit,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, and / or distributed between two or more computers. Furthermore, these units can be executed from various computer-readable media on which various data structures are stored. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit between a local system, a distributed system, and / or a network; for example, the Internet interacting with other systems via signals).

[0033] Example 1 like Figures 1 to 10 As shown, this embodiment provides an omnidirectional wireless power transmission device, which includes: The octahedral skeleton 1 has twelve edges to form eight vertically distributed triangular frames. In this embodiment, the octahedral skeleton 1 is an insulated hollow structure, which facilitates the arrangement of high-frequency power modules, compensation network devices and connection terminals inside the octahedral skeleton 1 or in the bottom space, thereby improving the structural integration and assembly consistency. Wire 2, starting from the endpoint of any edge, is continuously wound unidirectionally along the edge of each triangular frame to form a transmitting coil, wherein the wires of adjacent triangular frames are wound in opposite directions to form magnetic fields in opposite directions to enhance the magnetic field. A first resonant compensation network is connected to the transmitting coil; A high-frequency power supply system is connected to the first resonant compensation network; Three sets of coil units 3 are arranged orthogonally in pairs in the same plane, and each set of coil units 3 is electrically isolated from each other to form a receiving coil. The coil unit 3 includes: The first coil unit 31 has a rectangular structure. Two second coil units 32 are located inside the first coil unit 31 and are perpendicular to the two sides of the first coil unit 31. Two third coil units 33 are located within the first coil unit 31 and are perpendicular to the second coil unit 32, forming a pairwise orthogonal structure in the same plane.

[0034] Multiple second resonant compensation networks are respectively connected to the receiving coil to form their own independent resonant rectifier branches.

[0035] It should be noted that, in this embodiment, the transmitting coil forms in-plane sub-coils with opposite directions on the triangular faces of the adjacent triangular frames of the regular octahedral skeleton 1, and the in-plane sub-coils are distributed around the geometric center of the regular octahedral skeleton.

[0036] It should be noted that in this embodiment, the in-plane sub-coils of adjacent triangular faces have opposite winding directions or opposite equivalent magnetic pole distributions, thereby making the magnetic fields generated by adjacent triangular faces complementary and superimposed in space, thus improving the magnetic field density and uniformity in three-dimensional space. This structure utilizes the path characteristic that the number of vertices of a regular octahedron is even to achieve integrated winding, reducing structural redundancy and interconnection losses caused by assembling multiple coils.

[0037] It should be noted that, in this embodiment, the number of transmitting coils is single-turn or multiple-turn; When the number of turns of the transmitting coil is multi-turn, the number of turns of the transmitting coil on each triangular frame is the same, and they are arranged around the center point of the triangle.

[0038] It should be noted that in this embodiment, the spacing between adjacent transmitting coils remains equal on the same triangular frame, and each transmitting coil is wound along the edge, forming a 60-degree angle with the horizontal plane. This design enables the transmitting coils to form a uniformly distributed magnetic field region in space. Through the complementary superposition of the magnetic fields of adjacent triangular faces, the magnetic field blind zone is effectively reduced, and the magnetic field coverage and intensity stability in any direction within three-dimensional space are improved.

[0039] It should be noted that, in this embodiment, each group of coil units 3 is configured with a corresponding ferrite core or equivalent flux converging structure; the three groups of coils are used to decompose and pick up the transmitting magnetic field vector in three-dimensional space, so as to improve the effective coupling and transmission efficiency under arbitrary attitude and position conditions.

[0040] It should be noted that, in this embodiment, the high-frequency power supply system is used to drive the transmitting coil on the octahedral frame 1 to generate an alternating magnetic field, specifically including: The DC power supply module is used to convert the input low-frequency AC power into stable DC power after rectification and filtering. A full-bridge inverter circuit is connected to the DC power supply module. This circuit uses four switching transistors to alternately conduct at high frequency, converting DC power back into the required high-frequency AC power output. These two parts work together to achieve efficient and stable high-frequency power conversion and supply.

[0041] It should be noted that in this embodiment, the first resonant compensation network is an LCC compensation topology, which is a series compensation topology, together forming an LCC-S resonant structure. When the first resonant compensation network meets the resonance requirements, a low-pass filter composed of a filter inductor L and a parallel compensation capacitor C can be used to eliminate the high-order harmonics of the output voltage of the full-bridge inverter circuit, generating a fundamental frequency AC sinusoidal signal. This makes the current value of the transmitting coil independent of the load, and the transmitting coil current can achieve a weakly sensitive characteristic to load changes. The second resonant compensation network is used on the receiver side, which can achieve the characteristic of load-independent constant voltage output. Combined with the rectifier filter network, a stable DC output can be achieved.

[0042] It should be noted that, in this embodiment, the DC output terminal of the resonant rectifier branch is connected to the load in series, parallel or a combination of series and parallel to supply power to the load, so as to adapt to electrical equipment with different output voltage and current levels.

[0043] This embodiment provides the following specific implementation examples: (a) Octahedral emitter: Each triangular face of the regular octahedral framework 1 has a side length of 180 mm, and the radius of its circumscribed sphere is 128 mm.

[0044] The transmitting coil is wound with Litz wire, which is 0.1×500 strands of insulated wire with an outer diameter of approximately 3.05 mm. For example... Figure 9 As shown, the transmitting coil is formed by continuously winding a single wire along each edge (or equivalent boundary closed path) of the octahedral skeleton 1 to form a multi-turn coil. In this embodiment, the number of turns is 6, and the total inductance is approximately 35.87 μH. Figure 3 As shown, in order to achieve omnidirectional magnetic field coverage, by pre-setting a continuous winding path and winding sequence, in-plane sub-coils with opposite winding directions are formed in adjacent triangular faces of the regular octahedron. This results in the alternating magnetic fields generated by each triangular face being complementary and superimposed in space, forming a more stable magnetic field distribution in multiple directions, and improving the coupling stability and energy acquisition capability of the receiver under different attitudes and orientations.

[0045] Specifically, multi-turn transmitting coils can be arranged concentrically or proportionally along the same geometric center, or by setting reasonable inter-turn spacing, lead routing and fixing methods, the magnetic field strength and coverage can be improved without significantly increasing the overall size, and the influence of coil parasitic parameters on the operating frequency can be reduced.

[0046] In this embodiment, the high-frequency power supply system converts the DC input into high-frequency AC excitation and matches and compensates the transmitting coil through a transmitter resonant compensation network. The DC power supply module has a DC input voltage of 12V, an operating frequency of 100kHz, and a tuning capacitor of 32.2nF. The first resonant compensation network can be designed based on the equivalent parameters of the transmitting coil and the target load range to obtain better resonance characteristics and transmission efficiency near the target frequency.

[0047] A full-bridge inverter circuit is connected to the DC power supply module. After passing through the full-bridge inverter circuit, the DC voltage source forms a periodic rectangular pulse waveform with the same frequency as the receiving and transmitting coils. The four MOSFETs of the full-bridge inverter circuit are configured as upper and lower bridge arms. By controlling the alternating conduction frequency of the MOSFETs in the upper and lower bridge arms, different frequency outputs of the inverter can be achieved. The four freewheeling diodes are Schottky diodes, mainly serving to protect the switching transistors, and have a short reverse recovery time.

[0048] (ii) Three orthogonal receivers: Three sets of receiving coils are arranged orthogonally in pairs in space to pick up different vector components of the spatial magnetic field. This ensures effective coupling even when the receiver's attitude changes (rotation, tilt) or when there is a certain positional offset, thus improving output stability. Each receiving coil and its corresponding compensation capacitor form a resonant branch, which is then connected to the rectification and filtering circuit to create independent energy conversion channels. The rectified DC output can be combined in series, parallel, or a hybrid series-parallel configuration according to application requirements to adapt to the voltage and current requirements of different loads and facilitate subsequent power management and voltage regulation control.

[0049] The receiving coil is also wound with Litz wire, which is 0.1×500 strands of insulated wire with an outer diameter of approximately 3.05 mm. Figure 7 As shown, the second coil unit 32 and the third coil unit 33 are each composed of two sets of opposing spiral coils connected in series, and all three receiving coils are flat coil structures.

[0050] in: The second coil unit 32 has an outer side length of 20mm, an inner side length of 10mm, a height of 4mm, 3 turns, and a total inductance of 2.473μH; the second coil unit 32 and the third coil unit 33 have the same specifications and both have 3 turns. The first coil unit 31 has an outer side length of 100mm, an inner side length of 80mm, a height of 3.5mm, 6 turns, and a total inductance of 22.284μH.

[0051] To enhance magnetic flux focusing, reduce back flux leakage, and improve the coil's ability to capture spatial magnetic field components, a ferrite sheet is placed on the back of the receiving coil assembly as a magnetic focusing / conducting structure. In this embodiment, the ferrite sheet measures 70mm × 60mm × 2mm (length × width × height). The ferrite sheet can be mounted or spaced with the three sets of receiving coils according to actual structural requirements, balancing magnetic focusing effect, structural thickness, and heat dissipation space.

[0052] In this embodiment, the distance between the geometric center of coil unit 3 in the receiving coil and the geometric center of the transmitting coil is 110 mm. Figure 10 As shown, by picking up magnetic field components in different directions using three orthogonal coils, and by covering the multi-directional magnetic field in space with the octahedral structure of the transmitting end, this embodiment can maintain relatively stable energy acquisition and output performance under conditions of attitude change and certain offset at the receiving end.

[0053] The omnidirectional wireless power transmission device according to the present invention has the following advantages compared with the prior art: The unique octahedral structure and unidirectional winding method of this invention can generate an omnidirectional uniform magnetic field strength, thereby enabling the charging device to charge at any angle within a large range, and has a high tolerance for rotation angle and offset distance.

[0054] By using a planar receiving coil formed by three sets of mutually orthogonal and independent coils, the transmitted magnetic field can be effectively received from multiple directions in three-dimensional space, capturing more magnetic flux, thereby improving the transmission efficiency of the system and solving the problem of low efficiency of omnidirectional WPT and interference from cross-coupling.

[0055] By integrating the receiving coil into the same plane to form a flat structure, its size is greatly reduced, making it easy to install in objects such as mobile phones, computers, desktops, and walls.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0059] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An omnidirectional wireless power transmission device, characterized in that, include: The regular octahedral framework (1) has twelve edges to form eight vertically distributed triangular frames; The conductor (2) is continuously wound in one direction along the edge of each triangular frame to form a transmitting coil, starting from the endpoint of any edge. The conductors of adjacent triangular frames are wound in opposite directions. A first resonant compensation network is connected to the transmitting coil; A high-frequency power supply system is connected to the first resonant compensation network; Three sets of coil units (3) are arranged orthogonally in pairs in the same plane, and each set of coil units (3) is electrically isolated from each other to form a receiving coil; Multiple second resonant compensation networks are respectively connected to the receiving coil to form their own independent resonant rectifier branches.

2. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The transmitting coil forms in-plane sub-coils with opposite directions on the triangular faces of the adjacent triangular frames of the regular octahedral skeleton (1), and the in-plane sub-coils are distributed around the geometric center of the regular octahedral skeleton (1).

3. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The number of the transmitting coils can be single or multiple turns; When the number of turns of the transmitting coil is multi-turn, the number of turns of the transmitting coil on each triangular frame is the same, and they are arranged around the center point of the triangle.

4. The omnidirectional wireless power transmission device according to claim 3, characterized in that, On the same triangular frame, the spacing between adjacent transmitting coils remains equal, and each transmitting coil is wound along the edge, forming a 60-degree angle with the horizontal plane.

5. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The coil unit (3) includes: The first coil unit (31) has a rectangular structure. The second coil unit (32) is located inside the first coil unit (31) and is perpendicular to both sides of the first coil unit (31); The third coil unit (33) is located inside the first coil unit (31) and is perpendicular to the second coil unit (32).

6. The omnidirectional wireless power transmission device according to claim 5, characterized in that, The number of the second coil unit (32) and the third coil unit (33) are both two.

7. The omnidirectional wireless power transmission device according to claim 5, characterized in that, Each coil unit (3) is equipped with a ferrite core.

8. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The regular octahedral framework (1) is an insulating hollow structure.

9. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The high-frequency power supply system includes: The DC power supply module is used to convert the input low-frequency AC power into stable DC power after rectification and filtering. A full-bridge inverter circuit is connected to the DC power supply module.

10. The omnidirectional wireless power transmission device according to claim 1, characterized in that, The DC output terminal of the resonant rectifier branch is connected to the load in series, parallel, or a combination of series and parallel connections.

Images