Anti-offset underwater electric energy wireless transmission magnetic coupling mechanism

Abstract

The utility model discloses an anti-offset underwater electric energy wireless transmission magnetic coupling mechanism. The magnetic coupling mechanism comprises a transmitting end and a receiving end, the transmitting end comprises a transmitting coil and a quadrupole symmetrical pot-shaped magnetic core; wherein two groups of magnetic poles in the quadrupole symmetric pot-shaped magnetic core are orthogonally and symmetrically distributed at 90 degrees in space to form an independent magnetic flux path; the transmitting coil is wound on the pot-shaped magnetic core; the receiving end comprises two groups of secondary coils and magnetic cores; wherein each group of secondary side coils is formed by connecting three sections of 115-degree arc-shaped coils in series, and the two groups of secondary side coils are arranged in a staggered manner at a 60-degree mechanical phase difference. Through the processing scheme disclosed by the invention, the problem that the electric energy transmission efficiency is reduced due to rotation dislocation and axial deviation during charging dynamic docking of the underwater equipment is solved, and the mutual inductance coefficient fluctuation rate lt within the 240-degree effective working angle is realized through magnetic circuit complementation within the 360-degree rotation dislocation range of the charged equipment; the fluctuation ratio of the mutual inductance coefficient under the axial deviation of + / -10mm is 1t; and 2%.

Description

Technical Field

[0001] This utility model relates to the field of underwater wireless power transmission technology, and in particular to an anti-offset underwater wireless power transmission magnetic coupling mechanism. Background Technology

[0002] The development and utilization of marine resources has become a crucial area of ​​global technological competition, encompassing multiple dimensions of needs, including energy exploration, ecological monitoring, and national defense security. Underwater equipment is limited by battery capacity and endurance, severely restricting its operational efficiency and stealth. Traditional energy replenishment methods rely on wet-plug interfaces or battery replacement, resulting in low autonomy and poor stealth. Wireless power transmission technology can effectively circumvent these problems.

[0003] Underwater wireless charging technology utilizes the principle of electromagnetic coupling to achieve contactless energy transfer, offering advantages such as a large charging range, high degree of freedom, and strong concealment, significantly improving the stability and reliability of underwater equipment. However, the complex underwater environment makes it difficult to guarantee the efficiency and stability of underwater wireless charging. During wireless charging, the equipment is highly susceptible to the effects of docking position and water current impact, causing misalignment of the charging system. Since the presence of a charging dock greatly restricts radial displacement, the main problems with underwater wireless charging are currently rotational misalignment and axial displacement, reducing the equipment's energy transmission power and efficiency.

[0004] Existing magnetic coupling mechanisms for wireless charging systems have the following drawbacks:

[0005] First, it has poor resistance to rotational misalignment. The magnetic field distribution of traditional planar coils or monopole magnetic cores is not symmetrical enough. When the device being charged rotates, the overlapping area of ​​the primary and secondary magnetic fields is sharply reduced, and the coupling coefficient is significantly reduced.

[0006] Second, leakage flux and eddy current loss are prominent: high-frequency magnetic fields induce eddy currents in conductive seawater, which greatly interfere with mutual inductance, resulting in additional power loss. At the same time, leakage flux interferes with internal or surrounding electronic equipment.

[0007] Third, it is highly dependent on sensors: precise docking is required, and the offset is fed back in real time through high-precision position sensors. The system is highly complex, and the sensors are susceptible to corrosion or biofouling underwater, which can cause them to fail.

[0008] Therefore, it is evident that creating a new anti-deflection underwater wireless power transmission magnetic coupling mechanism has become an urgent goal for the industry to improve. Utility Model Content

[0009] In view of this, the present disclosure provides an anti-deflection underwater wireless power transmission magnetic coupling mechanism, which at least partially solves the problems existing in the prior art.

[0010] This disclosure provides an anti-drift underwater wireless power transmission magnetic coupling mechanism, the magnetic coupling mechanism comprising: a transmitter and a receiver;

[0011] The transmitting end includes a transmitting coil and a four-pole symmetrical pot-shaped magnetic core; wherein, the two sets of magnetic poles in the four-pole symmetrical pot-shaped magnetic core are orthogonally symmetrically distributed in space at 90° to form independent magnetic flux paths; the transmitting coil is wound around the pot-shaped magnetic core;

[0012] The receiving end includes two sets of secondary coils and a magnetic core; each set of secondary coils consists of three 115° arc-shaped coils connected in series, and the two sets of secondary coils are staggered with a 60° mechanical phase difference.

[0013] According to a specific implementation of this disclosure, the can-shaped magnetic core has an outer diameter of 61.8 mm, an inner diameter of 49 mm, and a magnetic pole diameter of 25 mm.

[0014] According to one specific implementation of this disclosure, each transmitting coil has 15 turns of coil wound around a can-shaped magnetic core.

[0015] According to one specific implementation of this disclosure, the air gap between the coil and the magnetic core is 1 mm.

[0016] According to one specific implementation of this disclosure, the coil is a 3mm copper wire.

[0017] According to a specific implementation of this disclosure, the outer diameter of the circle formed by the three 115° secondary coils is 99.4 mm, the inner diameter is 76.4 mm, and the width of a single group is 20 mm; the air gap between the two groups of secondary coils is 2 mm, and each group of secondary coils of the receiving coil is wound with three sections of 45 turns.

[0018] According to one specific implementation of this disclosure, the magnetic core of the receiving end is composed of three 118° arc-shaped magnetic cores; the inner diameter of the circle formed by the three arcs is 80.4 mm and the outer diameter is 95.5 mm.

[0019] According to one specific implementation of this disclosure, the gap between the transmitting end and the receiving end is 3mm.

[0020] According to one specific implementation of this disclosure, the diameter of the magnetic core of the receiving end is 13mm; the diameter of the secondary coil is 20mm.

[0021] According to one specific implementation of this disclosure, the mutual inductance stable effective working angle of the magnetic coupling mechanism is 240°.

[0022] The anti-offset underwater power wireless transmission magnetic coupling mechanism disclosed in this embodiment is applied to the high anti-offset magnetic coupling mechanism of autonomous underwater vehicles (AUVs) to solve the problem of reduced power transmission efficiency caused by rotational misalignment and axial offset during dynamic docking for underwater charging of AUVs. It achieves an effective working angle of 240° within a 360° rotational offset range for the AUV, with a mutual inductance coefficient fluctuation rate of <5%, and a mutual inductance coefficient fluctuation rate of <2% with an axial offset of ±10mm, providing reliable technical support for efficient power supply of AUVs in complex marine environments. Attached Figure Description

[0023] The above is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, the following describes this utility model in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 A schematic diagram of an anti-deflection underwater wireless power transmission magnetic coupling mechanism provided in this embodiment of the disclosure;

[0025] Figure 2 This is a top view schematic diagram of the transmitter end of an anti-offset underwater wireless power transmission magnetic coupling mechanism provided in an embodiment of this disclosure;

[0026] Figure 3 This is a side view of a magnetic coupling mechanism for anti-offset underwater wireless power transmission provided in an embodiment of the present disclosure;

[0027] Figure 4 This is a schematic diagram of a receiving end of an anti-offset underwater wireless power transmission magnetic coupling mechanism provided in an embodiment of the present disclosure;

[0028] Figure 5 A schematic diagram of the dimensions of an anti-offset underwater wireless power transmission magnetic coupling mechanism provided in this embodiment of the disclosure;

[0029] Figure 6 A schematic diagram of the cross-sectional magnetic flux of an anti-deflection underwater wireless power transmission magnetic coupling mechanism provided in this embodiment of the disclosure;

[0030] Figure 7 A schematic diagram of the dimensions of an anti-offset underwater wireless power transmission magnetic coupling mechanism provided in this embodiment of the disclosure;

[0031] Figure 8 This is a schematic diagram of the internal magnetic leakage of an anti-deflection underwater wireless power transmission magnetic coupling mechanism provided in an embodiment of the present disclosure;

[0032] Figure 9 This is a schematic diagram of the mutual inductance values ​​of two sets of secondary coils misaligned at different angles, provided by an embodiment of this disclosure.

[0033] Figure 10 A schematic diagram of the magnetic flux of a double-layer secondary coil provided in an embodiment of this disclosure;

[0034] Figure 11 This is a schematic diagram illustrating the change in mutual inductance under rotational misalignment, provided by an embodiment of this disclosure.

[0035] Figure 12 This is a schematic diagram of mutual inductance change under axial offset provided by an embodiment of the present disclosure;

[0036] Figure 13 This is a schematic diagram of the stability of mutual inductance at all angles provided in an embodiment of this disclosure. Detailed Implementation

[0037] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0038] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0039] It should be noted that various aspects of the embodiments described below are within the scope of the appended claims. It will be apparent that the aspects described in this invention can be embodied in a wide variety of forms, and any particular structure and / or function described in this invention is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described in this invention can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth in this invention can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth in this invention.

[0040] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0041] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0042] The main problem this invention aims to solve is that the magnetic coupling mechanism of existing underwater wireless charging devices has problems such as poor resistance to rotational offset, prominent leakage magnetic field and eddy current loss, and strong sensor dependence. In response to these shortcomings, a magnetic coupling mechanism with high resistance to offset is designed for wireless charging of autonomous underwater vehicles. To address the core problem of the sharp drop in magnetic coupling coefficient caused by rotational misalignment and axial offset during wireless charging of autonomous underwater vehicles (AUVs), a magnetic coupling mechanism with high resistance to offset is proposed.

[0043] Traditional underwater charging devices face challenges during AUV dynamic docking, including decreased coupling efficiency due to attitude angle deviations, increased power fluctuations due to eddy current losses in seawater, and energy transmission interruptions caused by mechanical rotation. This invention overcomes the limitations of existing technologies in responding to rotational misalignment and axial offset by employing a synergistic design of a four-pole symmetrical can-shaped magnetic core assembly and two sets of 60° offset three-segment arc-shaped secondary coils. This significantly improves the charging reliability of AUVs in complex marine environments, reduces energy waste and operational interruption risks caused by frequent attitude calibration, and provides a stable power supply for deep-sea exploration and long-term monitoring scenarios.

[0044] The collaborative design of a four-pole symmetrical can-shaped magnetic core transmitter and two sets of receivers, each consisting of three arc-shaped coils and offset at 60°, significantly improves power stability in underwater dynamic docking scenarios, especially suitable for AUVs experiencing rotational misalignment due to ocean current disturbances or attitude adjustments. This technical solution can be extended to non-contact charging systems for marine observation equipment, underwater robots, and other equipment, and is compatible with energy transfer requirements of different power levels. The design of this magnetic coupling mechanism overcomes the limitations of traditional underwater wireless charging devices in terms of sensitivity to rotational misalignment, and has broad application prospects in deep-sea exploration, seabed monitoring, and other fields.

[0045] like Figure 1 As shown, the anti-deflection underwater wireless power transmission magnetic coupling mechanism proposed in this disclosure includes: a transmitter and a receiver; the transmitter includes a transmitting coil and a four-pole symmetrical can-shaped magnetic core (such as...). Figure 2 , Figure 3As shown in the diagram, the yellow part represents the magnetic core, and the brown part represents the coil; the two sets of magnetic poles in the four-pole symmetrical pot-shaped magnetic core are orthogonally symmetrically distributed in space at 90°, forming independent magnetic flux paths; the transmitting coil is wound around the pot-shaped magnetic core; the receiving end includes two sets of secondary coils and a magnetic core (e.g., ...). Figure 4 (as shown in the figure). In this figure, each set of secondary coils consists of three 115° arc coils connected in series, and the two sets of secondary coils are staggered with a mechanical phase difference of 60°.

[0046] In this embodiment of the invention, the outer diameter of the can-shaped magnetic core is 61.8 mm, the inner diameter is 49 mm, and the diameter of the magnetic poles is 25 mm.

[0047] In this embodiment of the invention, each transmitting coil has 15 turns of coil wound around a can-shaped magnetic core.

[0048] In this embodiment of the invention, the air gap between the coil and the magnetic core is 1 mm.

[0049] In this embodiment of the invention, the coil is made of 3mm copper wire.

[0050] In the embodiments of this utility model, such as Figure 5 As shown, the outer diameter of the circle formed by the three 115° (R1) secondary coils is 99.4 mm, the inner diameter is 76.4 mm, and the width of a single group is 20 mm; the air gap between the two groups of secondary coils is 2 mm, and each group of secondary coils of the receiving coil is wound with three sections of 45 turns.

[0051] In the embodiments of this utility model, such as Figure 5 As shown, the magnetic core of the receiver consists of three 118° (R2) arc-shaped magnetic cores connected in series; the inner diameter of the circle formed by the three arcs is 80.4 mm, and the outer diameter is 95.5 mm. The length F of the magnetic core of the transmitter is 17.3 mm; the length E of the coil of the transmitter is 24.8 mm.

[0052] In this embodiment of the invention, the gap between the transmitting end and the receiving end is 3mm.

[0053] In this embodiment of the invention, the diameter of the magnetic core of the receiving end is 13mm; the diameter of the secondary coil is 20mm.

[0054] In this embodiment of the invention, the mutual inductance stable effective working angle of the magnetic coupling mechanism is 240°.

[0055] More specifically, the present invention will be described below with reference to embodiments.

[0056] To address the problem of drastic drop in magnetic coupling efficiency caused by rotational and axial offset during underwater wireless charging, this invention proposes an anti-offset optimization scheme based on magnetically coupled resonant wireless power transfer (MCR-WPT). By designing a four-pole symmetrical can-shaped magnetic core and a staggered three-segment arc-shaped secondary coil, the dynamic stability of the system is significantly improved: the primary side adopts an orthogonal decoupled magnetic circuit, covering a 360° magnetic field range, reducing the leakage flux; the two sets of coils on the secondary side are staggered with a 60° phase difference, and through a magnetic field superposition compensation mechanism, an effective working angle of 240° is achieved within a 360° rotational offset range of the AUV, with a mutual inductance coefficient fluctuation rate of <5%, and a mutual inductance coefficient fluctuation rate of <2% under an axial offset of ±10mm, providing reliable technical support for efficient power supply of AUVs in complex marine environments.

[0057] 1.1 Magnetic Coupling Module Transmitter

[0058] Four-pole symmetrical pot-shaped magnetic core

[0059] The orthogonal decoupled magnetic pole layout features two sets of magnetic poles spatially orthogonally symmetrically distributed at 90°, forming independent magnetic flux paths. This achieves electromagnetic decoupling of different energy transmission channels and avoids magnetic field interference. The magnetic flux paths of each set of poles are perpendicular to each other, ensuring that energy is fully released in the orthogonal direction and improving transmission stability under multi-degree-of-freedom offset.

[0060] The quadrupole symmetrical magnetic circuit design enables the magnetic field to cover a 360° spatial range, eliminating the magnetic field blind zone of traditional monopole or bipole structures.

[0061] The magnetic poles use a can-shaped magnetic core, which has good magnetic concentration and low magnetic leakage. Under the same excitation current, it can provide more energy to the AUV device.

[0062] The closed magnetic circuit is formed by the connection of the primary and secondary magnetic circuits through magnetic poles. The magnetic core uses a high-saturation magnetic material to reduce magnetic resistance and enhance magnetic field concentration.

[0063] The secondary side is embedded inside the device being charged, while the primary side is an external device, with a 3mm gap between the primary and secondary sides.

[0064] 1.2 Magnetic Coupling Module Receiver

[0065] Two sets of staggered three-segment arc-shaped secondary coils: The receiver uses two sets of secondary coils, each consisting of three 115° arc-shaped coils connected in series. The two sets are staggered with a 60° mechanical phase difference, and the magnetic flux mismatch caused by the rotation offset is compensated by magnetic field superposition.

[0066] Within a 360° rotational offset range of the AUV, through magnetic circuit complementarity, the mutual inductance coefficient fluctuation rate is less than 5% within an effective working angle of 240°.

[0067] Through the collaborative design of a 60° staggered layout and a 115° segmented coil, wide-angle anti-offset is achieved without the need for mechanical adjustment or sensor feedback.

[0068] The segmented structure reduces eddy current losses, and the redundant design allows power transmission to continue even if a single coil fails.

[0069] This invention, through its innovative magnetic coupling mechanism, overcomes the limitations of traditional underwater wireless charging devices that are sensitive to rotational deviation, significantly improving the reliability and energy efficiency of dynamic docking, and providing a highly stable power supply guarantee for scenarios such as deep-sea exploration and long-term monitoring.

[0070] like Figure 1 As shown, once the circuit and coil structure are determined, the main variable affecting transmission power and efficiency is mutual inductance. M， Mutual induction M It is mainly related to the coupling capability. Taking the LCC-S compensation network as an example, when the system is running in the resonant state, the output power and system efficiency can be obtained, that is:

[0071]

[0072]

[0073] in, It refers to output power; w It is the operating frequency. M eq It is the mutual inductance between the primary and secondary coils. It is the real part; It is the secondary port impedance; R p This is the equivalent eddy current resistance on the primary side. R s This is the equivalent eddy current resistance on the secondary side. I p This refers to the current flowing through the primary winding. It's about system efficiency; It is the primary side port impedance.

[0074] 2.1 Structure of the primary coil (transmitter end)

[0075] A coil is wound on a four-pole symmetrically distributed pot-shaped magnetic core, with orthogonal decoupling of the magnetic fields. The two sets of magnetic poles are orthogonally symmetrically distributed in space at 90°, forming independent magnetic flux paths. This achieves electromagnetic decoupling of different energy transmission channels and avoids magnetic field cross-interference. The magnetic flux paths of each set of magnetic poles are perpendicular to each other, ensuring that energy is fully released in the orthogonal direction and improving transmission stability under offset.

[0076] The transmitting coil is wound around a can-shaped magnetic core with an outer diameter of 61.8 mm, an inner diameter of 49 mm, and a pole diameter of 25 mm (e.g., ...). Figure 7As shown, the outer radius A of the magnetic core is 30.9 mm, the inner radius B is 24.5 mm, and the pole radius C is 12.5 mm. The coil is wound around the surface of the magnetic poles, with 15 turns for a single magnetic core coil and a total of 60 turns for the transmitting coil. The magnetic field covers a 360° spatial range, eliminating the magnetic field blind zone of traditional monopole or bipole structures. The magnetic poles adopt a four-pole symmetrical distribution using a pot-shaped magnetic core, resulting in good magnetic concentration and low magnetic leakage. Figure 6 As shown, under the same excitation current, more energy can be provided to the AUV device. The primary and secondary magnetic circuits form a closed loop through magnetic pole docking. The magnetic core uses a high-saturation magnetic material to reduce magnetic reluctance and enhance magnetic field concentration. The secondary coil has a large magnetic flux, resulting in low internal leakage flux. Figure 8 As shown, this has minimal impact on the internal electronic equipment of autonomous underwater vehicles.

[0077] 2.2 Structure of the secondary coil

[0078] The receiver employs two sets of secondary coils, each consisting of three 115° arc coils connected in series, with the two sets connected in parallel. Testing showed that the strongest mutual inductance was achieved when the two secondary sets were arranged alternately with a 60° mechanical phase difference. Figure 9 As shown.

[0079] Based on the actual dimensions of the underwater autonomous vehicle, the secondary coil has an outer diameter of 99.4 mm, an inner diameter of 76.4 mm, a single-group width of 20 mm, and an air gap of 2 mm between the two groups. Each secondary coil of the receiving coil is wound in three sections with 45 turns each, for a total of 90 turns.

[0080] Compensation for magnetic flux mismatch caused by rotational offset is achieved through magnetic field superposition, such as Figure 10 As shown, the left side is Rx. 1， Rx is on the right. 2。

[0081] M 1 represents the mutual inductance between the primary coil group Tx1 and Rx1+Rx2. M 2 represents the mutual inductance of Tx2 and Rx1+Rx2. As can be seen from the test diagram, their mutual inductances are complementary within a certain range, and the total mutual inductance they form... M = M 1+ M 2. Stability is achieved over a relatively wide range. Simulation tests using COMSOL software show that mutual inductance remains stable within a 20° range for every 30° rotational offset, with a mutual inductance fluctuation rate of <5%. Figure 11 As shown. High energy density transport is maintained within the 10°-20° range. k >0.15. Due to structural symmetry and complementarity, mutual inductance stability is achieved within an effective working angle of 240° over a 360° rotational offset range for the AUV. The fluctuation rate of the mutual inductance coefficient is <2% under an axial offset of ±10mm. Figure 12As shown, maintaining stable mutual inductance during the underwater wireless charging process allows for high-precision docking without relying on sensors, such as... Figure 13 As shown.

[0082] The combination of a four-pole symmetrical magnetic core and a double-layer staggered secondary coil, through orthogonal magnetic field distribution and complementary magnetic circuit mechanism, extends the effective working angle to 240°, suppresses mutual inductance fluctuation to within 5%, and achieves mutual inductance coefficient fluctuation rate of <2% with axial offset of ±10mm, significantly reducing the dependence on high-precision sensors.

[0083] This utility model has the following advantages:

[0084] Breakthrough in anti-rotational offset performance, extended effective working angle, achieving a stable working range of 240° within a 360° range of rotational misalignment of the charged device, and enhanced dynamic fault tolerance.

[0085] It can maintain a stable high energy density within each 10°-20° range, and the mutual inductance coefficient fluctuation rate is <5% within ±20° of rotational misalignment, without the need for mechanical adjustment or real-time sensor feedback.

[0086] The mutual inductance coefficient fluctuation rate is <2% with an axial offset of ±10mm.

[0087] Segmented arc coils reduce eddy current losses.

[0088] Reduced magnetic leakage lowers electromagnetic interference to underwater electronic equipment.

[0089] The magnetic fields between coil groups are complementary, eliminating the need for precise alignment and adjustment, and the absence of high-precision sensor control, thus reducing the failure rate.

[0090] The redundant fault-tolerant design ensures that transmission can continue even if a single coil fails, guaranteeing system reliability under extreme conditions.

[0091] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A magnetic coupling mechanism for anti-deflection underwater wireless power transmission, characterized in that, The magnetic coupling mechanism includes: a transmitter and a receiver; The transmitting end includes a transmitting coil and a four-pole symmetrical pot-shaped magnetic core; wherein, the two sets of magnetic poles in the four-pole symmetrical pot-shaped magnetic core are orthogonally symmetrically distributed in space at 90° to form independent magnetic flux paths; the transmitting coil is wound around the pot-shaped magnetic core; The receiving end includes two sets of secondary coils and a magnetic core; each set of secondary coils consists of three 115° arc-shaped coils connected in series, and the two sets of secondary coils are staggered with a 60° mechanical phase difference.

2. The anti-deflection underwater wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that, The can-shaped magnetic core has an outer diameter of 61.8 mm, an inner diameter of 49 mm, and a magnetic pole diameter of 25 mm.

3. The anti-deflection underwater wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that, Each transmitting coil has 15 turns of coil wound around a pot-shaped magnetic core.

4. The magnetic coupling mechanism according to claim 1, characterized in that, The air gap between the coil and the magnetic core is 1mm.

5. The magnetic coupling mechanism according to any one of claims 3-4, characterized in that, The coil is made of 3mm copper wire.

6. The anti-deflection underwater wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that, The outer diameter of the circle formed by the three 115° secondary coils is 99.4 mm, the inner diameter is 76.4 mm, and the width of a single group is 20 mm; the air gap between the two groups of secondary coils is 2 mm, and each group of secondary coils of the receiving coil is wound with three sections of 45 turns.

7. The magnetic coupling mechanism according to claim 1, characterized in that, The magnetic core of the receiver consists of three 118° arc-shaped magnetic cores; the inner diameter of the circle formed by the three arcs is 80.4 mm and the outer diameter is 95.5 mm.

8. The magnetic coupling mechanism according to claim 1, characterized in that, The gap between the transmitter and receiver is 3mm.

9. The magnetic coupling mechanism according to claim 1, characterized in that, The diameter of the magnetic core of the receiving end is 13mm; the diameter of the secondary coil is 20mm.

10. The anti-deflection underwater wireless power transmission magnetic coupling mechanism according to any one of claims 1-9, characterized in that, The mutual inductance stable effective working angle of the magnetic coupling mechanism is 240°.

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