Electromagnetic coupling mechanism for a wireless power transfer system for a round-dish submersible

Abstract

This invention discloses an electromagnetic coupling mechanism for a wireless power transmission system used in a disc-shaped submersible, relating to the field of wireless power transmission technology. The electromagnetic coupling mechanism includes a transmitting coil and a receiving coil. The transmitting coil comprises multiple arc-shaped elliptical transmitting coils, which are uniformly and symmetrically distributed in space, and their overall structure conforms to the lower half of the disc-shaped submersible's shell. The receiving coil is a segmented arc-shaped D-type coil. The electromagnetic coupling mechanism of this invention can adapt to the special shape and structure of disc-shaped submersibles and underwater base stations, and can maintain a stable coupling relationship even when vertical positional shifts and rotational angle shifts occur.

Description

Technical Field

[0001] This invention relates to the field of wireless power transmission technology, specifically to an electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible, and a method for optimizing the parameters of the electromagnetic coupling mechanism. Background Technology

[0002] The ocean contains abundant natural resources with vast potential applications, yet human exploitation of it is far from complete. Therefore, exploring and developing marine resources, including the surveying and exploration of deep-sea organisms and minerals, is a key direction for future marine development. Due to the unique marine environment, underwater vehicles, as an important means of exploring underwater resources, have been widely researched and applied.

[0003] Disc-shaped submersibles represent a novel approach to underwater vehicle design. Their unique shape and structure grant them superior autonomous control capabilities, enabling free movement and stable navigation within small areas such as reefs and seaweed in the ocean. Disc-shaped submersibles offer advantages such as stable movement and excellent maneuverability even in harsh working environments. They can remain on the seabed for extended periods and perform functions difficult to achieve with conventional underwater vehicles, including free takeoff and landing, hovering, full-circle turning, and bottom-hugging navigation.

[0004] Wireless power transfer technology, as a safe and reliable method of power transmission, eliminates the constraints of cables used in traditional charging methods and is an effective solution to the power needs of underwater vehicles operating continuously for extended periods in the unique marine environment. The wireless power supply system achieves power transmission through electromagnetic coupling between a power transmitting coil located at an underwater base station and a receiving coil mounted on the submersible. The performance of this electromagnetic coupling mechanism determines key indicators such as the power transmission power and efficiency of the wireless power transfer system. Because disc-shaped submersibles are subject to the impact and interference of irregular ocean currents in the marine environment, they experience vertical displacement relative to the underwater base station. Furthermore, the disc-shaped structure of the submersible makes it prone to rotation, resulting in angular displacement.

[0005] Therefore, in order to ensure stable power transmission of the disc-shaped submersible's wireless power supply system in the marine environment, it is necessary to design an electromagnetic coupling mechanism that maintains a stable coupling relationship between the power transmitting coil and the receiving coil when vertical position shifts and rotation angle shifts occur, taking into account the special shape and structure of the disc-shaped submersible and the seabed base station. Summary of the Invention

[0006] This application provides an electromagnetic coupling mechanism and its parameter optimization method for a wireless power transmission system for disc-shaped submersibles. It can be adapted to the special shape and structure of disc-shaped submersibles and seabed base stations, and can maintain a stable coupling relationship even when vertical position shifts and rotation angle shifts occur.

[0007] In a first aspect, embodiments of this application provide an electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible, including a transmitting coil and a receiving coil; wherein, the transmitting coil includes multiple arc-shaped elliptical transmitting coils; the multiple arc-shaped elliptical transmitting coils are uniformly and symmetrically distributed in space, and their overall structure fits the lower half of the disc-shaped submersible shell; the receiving coil is a segmented arc-shaped D-type coil.

[0008] In conjunction with the first aspect, in one embodiment, the arc-shaped elliptical transmitting coil is a coil with a hollow elliptical structure, and its major axis... a Both ends bend inward to form an arc surface.

[0009] In conjunction with the first aspect, in one embodiment, the plane containing the centers of the plurality of arc-shaped elliptical transmitting coils is at the same height as the lowest point of the circular arc surface of the transmitting coil. h The height of the arc-shaped elliptical transmitting coil center is no more than 1 / 5 of the center height of the disc-shaped submersible. h It should not exceed 1 / 5 of the center height of the disc-shaped submersible.

[0010] In conjunction with the first aspect, in one embodiment, the minor axis of the arcuate elliptical transmitting coil b The following conditions must be met:

[0011] b < ;

[0012] in, P The number of elliptical transmitting coils. e To be at horizontal height h The outer diameter of the hull of the lower disc-shaped submersible.

[0013] In conjunction with the first aspect, in one embodiment, the segmented arc-shaped D-type coil includes multiple arc-shaped D-type receiving coils; the multiple arc-shaped D-type receiving coils are evenly and symmetrically distributed around the circumference, and their overall structure fits the annular connection part of the upper and lower shells of the disc-shaped submersible.

[0014] In conjunction with the first aspect, in one embodiment, the arc-shaped D-type receiving coil has a hollow rectangular structure, and its two ends are bent inward to form an arc surface.

[0015] In conjunction with the first aspect, in one embodiment, the number of the arc-shaped elliptical transmitting coils is equal to the number of the arc-shaped D-type receiving coils.

[0016] In conjunction with the first aspect, in one embodiment, the number of the arc-shaped elliptical transmitting coil and the number of the arc-shaped D-type receiving coil are both three.

[0017] Secondly, embodiments of this application also provide a method for optimizing the parameters of the electromagnetic coupling mechanism of a wireless power transmission system for a disc-shaped submersible, comprising:

[0018] Adjust the major axis of the curved elliptical transmitting coil a With a mutual inductance volatility of less than 40% as the optimization objective, the long axis... a Optimization is performed; the mutual inductance fluctuation rate is based on the mutual inductance value obtained from finite element simulation analysis under different vertical position offsets and rotation angle offsets. M It is obtained through calculation using a formula;

[0019] Based on optimized major axis a Adjust the short axis of the elliptical transmitting coil. b With a mutual inductance volatility of less than 30% as the optimization objective, the short axis... b Optimize;

[0020] Based on optimized major axis a and short axis b Adjust the number of turns of the curved elliptical transmitting coil. N 1. With the mutual inductance volatility set at less than 20% as the optimization objective, the number of turns is adjusted accordingly. N 1. Optimize;

[0021] Based on optimized major axis a short axis b and number of turns N 1. Adjust the number of turns of the segmented arc-shaped D-type coil. N 2. With the mutual inductance volatility set at less than 10% as the optimization objective, the number of turns was adjusted. N 2. Optimize.

[0022] In conjunction with the second aspect, in one implementation, the formula for calculating the mutual inductance volatility is:

[0023] Mutual inductance volatility = ;

[0024] In the formula, The maximum mutual inductance, This represents the minimum mutual inductance.

[0025] The beneficial effects of the technical solutions provided in this application include:

[0026] In this embodiment, the transmitting coil includes multiple arc-shaped elliptical transmitting coils. These coils are uniformly and symmetrically distributed in space, and their overall structure fits the lower shell of the disc-shaped submersible, thus adapting well to its unique shape. Furthermore, considering the structural characteristics of the disc-shaped submersible, the receiving coil is designed as a segmented arc-shaped D-type coil. This segmented arc-shaped D-type coil ensures stable and efficient power reception within a certain charging area. Therefore, the electromagnetic coupling mechanism of this embodiment effectively adapts to the unique shape of both the disc-shaped submersible and the seabed base station, exhibiting structural compatibility with both. Moreover, the multiple arc-shaped elliptical transmitting coils generate a uniform magnetic field within a certain height range in the vertical direction. Combined with the stable and efficient power reception within a certain charging area by the segmented arc-shaped D-type coil, this ensures stable coupling even when there is a vertical position shift or rotational angle shift between the disc-shaped submersible and the seabed base station, effectively guaranteeing stable power transmission of the disc-shaped submersible's wireless power transmission system in the marine environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a disc-shaped submersible to which the electromagnetic coupling mechanism of this application is applicable.

[0029] Figure 2 This is a schematic diagram of the electromagnetic coupling mechanism of the wireless power transmission system for a disc-shaped submersible in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the installation of the electromagnetic coupling mechanism in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram showing the rotation angle shift of a disc-shaped submersible.

[0032] Figure 5 This is a schematic diagram showing the vertical position offset of a disc-shaped submersible.

[0033] Figure 6 This is a flowchart illustrating the parameter optimization method for the electromagnetic coupling mechanism of a wireless power transmission system used in a disc-shaped submersible, as described in this application.

[0034] Figure 7 This is a schematic diagram illustrating the specific process of optimizing the parameters of an electromagnetic coupling mechanism in one example.

[0035] Figure 8 This is a schematic diagram illustrating the variation of mutual inductance between the transmitting and receiving coils of an electromagnetic coupling mechanism with angular offset.

[0036] Figure 9 This is a schematic diagram illustrating the variation of mutual inductance between the transmitting and receiving coils of an electromagnetic coupling mechanism with vertical position offset.

[0037] Figure 10 This is a vector distribution diagram of the magnetic flux density of an elliptical transmitting coil.

[0038] In the picture:

[0039] 1. Transmitting coil; 11. Arc-shaped elliptical transmitting coil;

[0040] 2. Receiving coil; 21. Segmented arc-shaped D-type coil; 211. Arc-shaped D-type receiving coil;

[0041] 3. Disc-shaped submersible. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0043] In the first aspect, the embodiments of this application provide an electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible 3, which can be effectively adapted to the special shape and structure of the disc-shaped submersible 3 and the seabed base station, and can still maintain a stable coupling relationship when there is a vertical position shift or rotation angle shift between the disc-shaped submersible 3 and the seabed base station, effectively ensuring stable power transmission of the wireless power transmission system of the disc-shaped submersible 3 in the marine environment.

[0044] See Figure 1 , Figure 1 This is a schematic diagram of a disc-shaped submersible 3 to which the electromagnetic coupling mechanism of this application is applicable. Figure 1 As shown, the disc-shaped submersible 3 is flattened and disc-shaped. This design helps reduce underwater drag and improve navigation efficiency. Typically, it consists of upper and lower hulls, with the connection point designed as a ring structure. The upper and lower hulls are bolted together, forming a ring-shaped connection. See also... Figure 1 As shown, the height of the annular connection between the upper and lower hulls of the disc-shaped submersible 3 is [missing information]. lThe diameter of the disc-shaped submersible 3 is d .

[0045] See Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of the electromagnetic coupling mechanism of the wireless power transmission system for the disc-shaped submersible 3 in an embodiment of this application; Figure 3 This is a schematic diagram showing the installation of the electromagnetic coupling mechanism of the wireless power transmission system for the disc-shaped submersible 3 in an embodiment of this application. Figure 2 and Figure 3 As shown, in one embodiment, the electromagnetic coupling mechanism includes a transmitting coil 1 and a receiving coil 2. The transmitting coil 1 includes multiple arc-shaped elliptical transmitting coils 11; these multiple arc-shaped elliptical transmitting coils 11 are uniformly and symmetrically distributed in space, and their overall structure fits the lower half of the disc-shaped submersible 3, thus adapting well to the special shape of the disc-shaped submersible 3. Furthermore, considering the structural characteristics of the disc-shaped submersible 3, the receiving coil 2 is designed as a segmented arc-shaped D-type coil 21. The segmented arc-shaped D-type coil 21 can ensure that the disc-shaped submersible 3 can receive electrical energy stably and efficiently within a certain charging range.

[0046] Among them, such as Figure 2 As shown, the major axis of the arc-shaped elliptical transmitting coil 11 is... a The minor axis is b Then the ratio of the minor axis to the major axis of the elliptical arc-shaped transmitting coil 11 is: Furthermore, the number of turns of the arc-shaped elliptical transmitting coil 11 is... N 1. The number of turns of the segmented arc-shaped D-type coil 21 is: N 2. For example Figure 3 As shown, the segmented D-type receiving coil is installed inside the shell of the disc-shaped submersible 3 and is located at the annular connection between the upper and lower shells. Preferably, the height of the segmented arc-shaped D-type coil 21 does not exceed the height of the annular connection between the upper and lower shells of the disc-shaped submersible 3. l Multiple curved elliptical transmitting coils 11 can be integrated into the submarine base station. Its overall shape and structure fit the lower half of the disc-shaped submersible 3, making the electromagnetic coupling mechanism structurally compatible with the disc-shaped submersible, and thus making the submarine base station structurally compatible with the disc-shaped submersible.

[0047] Depend on Figure 2 and Figure 3As can be seen, in this embodiment, the transmitting coil 1 includes multiple arc-shaped elliptical transmitting coils 11; the multiple arc-shaped elliptical transmitting coils 11 are evenly and symmetrically distributed in space, and their overall structure fits the lower half of the disc-shaped submersible 3, which can well adapt to the special shape structure of the disc-shaped submersible 3; and considering the structural characteristics of the disc-shaped submersible 3, the receiving coil 2 is designed as a segmented arc-shaped D-type coil 21. The segmented arc-shaped D-type coil 21 can ensure that the disc-shaped submersible 3 can receive electrical energy stably and efficiently within a certain charging area. Therefore, the electromagnetic coupling mechanism of this embodiment can effectively adapt to the special shape structure of the disc-shaped submersible 3 and the seabed base station, and has the advantage of structural affinity for the seabed base station and the disc-shaped submersible 3.

[0048] See Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram showing the rotation angle offset of the disc-shaped submersible 3. Figure 5 This is a schematic diagram showing the vertical position offset of the disc-shaped submersible 3. Figure 4 and Figure 5 As shown, a rectangular coordinate system is established with the center of the disc-shaped submersible 3 as the origin, where the height offset is assumed to be Δ. h Angular offset is Then the disc-shaped submersible 3 relative to position 1 will undergo... The situation after the angle shift to position 2 is as follows Figure 4 As shown, the disc-shaped submersible 3 undergoes a vertical position shift Δ relative to position 1. h The case of arriving at position 2 later is as follows: Figure 5 As shown.

[0049] Depend on Figure 4 and Figure 5 It can be seen that multiple arc-shaped elliptical transmitting coils 11 can generate a uniform magnetic field within a certain height range in the vertical direction. Combined with the segmented arc-shaped D-type coils 21, which can receive electrical energy stably and efficiently within a certain charging area, the disc-shaped submersible 3 can still maintain a stable coupling relationship when there is a vertical position shift or rotation angle shift between it and the seabed base station. This effectively ensures the stable power transmission of the disc-shaped submersible 3 wireless power transmission system in the marine environment.

[0050] Furthermore, such as Figure 2As shown, in one embodiment, each arc-shaped elliptical transmitting coil 11 is a hollow elliptical structure, with both ends of its major axis bent inwards to form an arc surface. It is understood that during coil winding, more turns do not necessarily mean tighter coupling between coils. On the contrary, the coils inside the transmitting coil 1 do not significantly improve mutual inductance; instead, they increase the self-inductance of the transmitting coil 1, thereby increasing the system's power loss. Therefore, in this embodiment, the arc-shaped elliptical transmitting coil 11 is designed as a hollow elliptical structure. This hollow structure design better balances the resistance of the transmitting coil 1 with the mutual inductance between the electromagnetic coupling mechanism, achieving a lower coil resistance while meeting system requirements for mutual inductance, thus minimizing system power loss. Furthermore, the hollow coil design further reduces the number of coils used, lowering the cost of the coupler. Furthermore, in this embodiment, the arc-shaped elliptical transmitting coil 11 is designed to bend inward from both ends of the major axis to form an arc surface. This allows each arc-shaped elliptical transmitting coil 11 to have a larger contact surface with the bottom of the disc-shaped submersible 3, enabling it to fit better with the bottom of the disc-shaped submersible 3. This avoids electromagnetic interference caused by the electromagnetic field generated by the arc-shaped elliptical transmitting coil 11 to the navigation, control, and other electronic components inside the disc-shaped submersible 3.

[0051] Furthermore, also considering that the electromagnetic field generated by the curved elliptical transmitting coil 11 would cause electromagnetic interference to the navigation, control, and other electronic components inside the disc-shaped submersible 3, the transmitting coil 1 should be positioned as close as possible to the bottom of the disc-shaped submersible 3. In one embodiment, based on the structural layout of the various functional modules inside the disc-shaped submersible 3, the height of the horizontal plane containing the center of the curved elliptical transmitting coil 11 is designed... h The height is limited to no more than the center height of the disc-shaped submersible. H 1 / 5, that is h ≤ H Disc-shaped submersible 3 center height H and its height H 1 / 5, see also Figure 1 As shown.

[0052] Based on this, in one embodiment, the minor axis of the arc-shaped elliptical transmitting coil 11 is further defined as... b The design is carried out to ensure that the height of the center of the arc-shaped elliptical transmitting coil 11 is within the specified range. h ≤ H Under these conditions, the shape of the designed arc-shaped elliptical transmitting coil 11 can be adapted to the special external structure of the disc-shaped submersible 3. Specifically, in this embodiment, the minor axis of the arc-shaped elliptical transmitting coil 11... b The following conditions must be met:

[0053] b < ;

[0054] in, P The number of elliptical transmitting coils 11. e Let the outer diameter of the hull of the disc-shaped submersible at a horizontal height h be as follows: Figure 1 As shown. Under the above conditions, the overlapping of multiple arc-shaped elliptical transmitting coils 11 can be avoided, thereby weakening the coupling relationship between transmitting coil 1 and receiving coil 2.

[0055] Further, see Figure 2 and Figure 3 As shown, in one embodiment, the segmented arc-shaped D-type coil 21 includes multiple arc-shaped D-type receiving coils 211; the multiple arc-shaped D-type receiving coils 211 are evenly and symmetrically distributed around the circumference, and their overall structure fits the annular connecting part of the upper and lower shells of the disc-shaped submersible 3, which can provide better structural compatibility with the disc-shaped submersible 3. More specifically, as shown... Figure 2 As shown, the curved D-shaped receiving coil 211 has a hollow rectangular structure, with both ends bent inwards to form an arc. Following the same design principle as the hollow-structured curved elliptical transmitting coil 11 described above, this embodiment uses a hollow rectangular structure for the curved D-shaped receiving coil 211. This hollow structure design better balances the coil's resistance and the mutual inductance between the electromagnetic coupling mechanism, achieving a lower coil resistance while meeting system requirements for mutual inductance, thus minimizing system power loss. Furthermore, the hollow coil design further reduces the number of coils used, lowering costs.

[0056] And, as Figure 2 As shown, the central angle subtended by a single arc-shaped D-type receiving coil 211 is... β The radius of the arc where the curved D-type receiving coil 211 is located is r It is understandable that the central angle of the curved D-type receiving coil 211... β The setting determines the laying range of the curved D-type coil 211. If the central angle β If the setting is too small, the self-inductance of the receiving coil will be small, and the coupler may not be able to generate enough mutual inductance for power transfer; if the central angle is too small... β A larger radius of curvature results in a larger area for the receiving coil, and using too many coils increases weight, reducing the payload capacity of the disc-shaped submersible 3 and decreasing wireless power transmission efficiency. The radius of curvature... r The design is intended for disc-shaped submersibles 3 of different sizes. Since different types and functions of disc-shaped submersibles 3 have different structural dimensional parameters, the arc radius is adjusted to accommodate the design of the receiving coil for these different sized disc-shaped submersibles 3. rThe setting is directly related to the structural parameters of the disc-shaped submersible 3. Therefore, in this embodiment, the central angle subtended by a single arc-shaped D-type receiving coil 211 is... β The value range is designed to be 0°-120°, which meets the above design requirements; while the radius of the arc where the curved D-type receiving coil 211 is located... r， This can be determined based on the specific structural dimensions of the disc-shaped submersible 3. For example, if a diameter is used... d For a 400mm disc-shaped submersible 3, the radius of the arc containing the curved D-type receiving coil 211 is... r 200mm should be selected.

[0057] In practical applications, in order to ensure good structural compatibility and stable electromagnetic coupling between the designed multiple arc-shaped elliptical transmitting coils 11 and multiple arc-shaped D-type receiving coils 211, the number of arc-shaped elliptical transmitting coils 11 and arc-shaped D-type receiving coils 211 can be designed to be equal.

[0058] Preferably, taking into account the overall structure of the disc-shaped submersible 3, the need for resistance to rotational angular displacement, and considering coil cost and engineering feasibility, three arc-shaped elliptical transmitting coils 11 and three arc-shaped D-type receiving coils 211 are preferably used, such as... Figures 2-5 As shown.

[0059] Secondly, embodiments of this application provide a method for optimizing the parameters of the electromagnetic coupling mechanism of a wireless power transmission system for a disc-shaped submersible 3, thereby optimizing the parameters of the electromagnetic coupling mechanism of the wireless power transmission system for a disc-shaped submersible 3 as described in the first aspect. This parameter optimization method aims to ensure the uniformity of mutual inductance between the transmitting coil 1 and the receiving coil 2 under different vertical position offsets and rotation angle offsets, optimizing the structural parameters of the electromagnetic coupling mechanism to ensure that the transmitting coil 1 and the receiving coil 2 of the wireless power transmission system of the disc-shaped submersible 3 maintain a stable electromagnetic coupling relationship in a dynamic marine environment.

[0060] See Figure 6 As shown, Figure 6 This is a flowchart illustrating the parameter optimization method for the electromagnetic coupling mechanism of the wireless power transmission system used in the disc-shaped submersible 3, as described in this application embodiment. Figure 6 As shown, in one embodiment, a method for optimizing the electromagnetic coupling mechanism parameters of a wireless power transmission system for a disc-shaped submersible 3 includes:

[0061] Step 601: Adjust the major axis of the arc-shaped elliptical transmitting coil 11. a With a mutual inductance volatility of less than 40% as the optimization objective, the long axis... aOptimization is performed; the mutual inductance fluctuation rate is based on the mutual inductance value obtained from finite element simulation analysis under different vertical position offsets and rotation angle offsets. M It is calculated using a formula; optionally, in specific applications, the formula for calculating mutual inductance volatility can be as follows:

[0062] Mutual inductance volatility = ;

[0063] In the formula, The maximum mutual inductance, To minimize mutual inductance, M The mutual inductance values ​​are obtained from finite element simulation analysis under different vertical position offsets and rotation angle offsets.

[0064] Step 602: Based on the optimized major axis a Adjust the short axis of the elliptical transmitting coil 11. b With a mutual inductance volatility of less than 30% as the optimization objective, the short axis... b Optimize.

[0065] Step 603: Based on the optimized major axis a and short axis b Adjust the number of turns of the elliptical transmitting coil 11. N 1. With the mutual inductance volatility set at less than 20% as the optimization objective, the number of turns is adjusted accordingly. N 1. Optimize.

[0066] Step 604: Based on the optimized major axis a short axis b and number of turns N 1. Adjust the number of turns of the segmented arc-shaped D-type coil 21. N 2. With the mutual inductance volatility set at less than 10% as the optimization objective, the number of turns was adjusted. N 2. Optimize.

[0067] It is understandable that the mutual inductance between transmitting coil 1 and receiving coil 2 directly characterizes the coupling effect of the wireless power transmission system. Therefore, the magnitude of the mutual inductance can be used as an important indicator for evaluating the anti-offset capability of the electromagnetic coupling structure of the disc-shaped submersible 3's wireless power transmission system. In this embodiment, the optimization objective is to optimize the uniformity of the mutual inductance between transmitting coil 1 and receiving coil 2 under different vertical position offsets and rotational angle offsets (judged by the mutual inductance fluctuation rate). a , b , N 1. N 2. Optimization was carried out sequentially to ensure that the transmitting coil 1 and receiving coil 2 of the wireless power transmission system of the disc-shaped submersible 3 could maintain a stable electromagnetic coupling relationship in a dynamic marine environment.

[0068] For example, to better understand the specific process of optimizing the electromagnetic coupling mechanism parameters in this application, the following will be combined with... Figure 7 As shown, a specific example illustrates the overall implementation process of the above-mentioned electromagnetic coupling mechanism parameter optimization method. Furthermore, to verify the feasibility and effectiveness of the electromagnetic coupling mechanism provided by this invention, this example constructs an electromagnetic field simulation model of the electromagnetic coupling mechanism and optimizes the parameters of the electromagnetic coupling mechanism using the finite element simulation software COMSOL Multiphysics. The resulting structural parameters with optimal anti-offset performance are obtained, and the electromagnetic coupling effect of the electromagnetic coupling mechanism under different vertical position offsets and rotation angle offsets is verified.

[0069] The electromagnetic coupling mechanism used in this example includes three arc-shaped elliptical transmitting coils 11 and three arc-shaped D-type receiving coils 211, wherein the central angle subtended by each arc-shaped D-type receiving coil 211 is... β The angle is 120°, and the inner diameter d of the hull of the applicable disc-shaped submersible 3 is 400 mm, which is for horizontal height. h Lower disc-shaped submersible 3 hull outer diameter e =80mm. Therefore, when the minor axis of the arc-shaped elliptical transmitting coil 11 is... b satisfy b < At that time, it can be known that the minor axis of the arc-shaped elliptical transmitting coil 11 is... b The value range is 10-80mm.

[0070] like Figure 7 As shown, the specific steps for optimizing the electromagnetic coupling mechanism parameters are as follows:

[0071] Step 1: First, configure the parameters. a , b , N 1. N 2. Perform initialization settings ( a =10mm, b =10mm, N 1=1, N 2=1); the short axis of the arc-shaped elliptical transmitting coil 11 b Fixed at 10mm, the major axis of the arc-shaped elliptical transmitting coil 11 a The mutual inductance was increased sequentially from 10mm to 120mm in increments of 10mm, based on the mutual inductance values ​​obtained from finite element simulation. M Calculate mutual inductance volatility, mutual inductance volatility = The mutual inductance volatility is then checked to determine if it is less than 40%. By comparing the mutual inductance volatility, the major axis of the optimized arc-shaped elliptical transmitting coil 11 is determined. a It is 100mm.

[0072] Step 2: Then, taking into account the minor axis of the arc-shaped elliptical transmitting coil 11 b The value ranges from 10 to 80 mm, therefore the ratio of the minor axis to the major axis of the arc-shaped elliptical transmitting coil 11 can be calculated. The value range is 0.1-0.8. Based on the major axis a With a length of 100mm, adjust the short shaft. b , making The mutual inductance was increased sequentially from 0.1 to 0.8 in increments of 0.1, based on the mutual inductance values ​​obtained from finite element simulation. M Calculate the mutual inductance volatility. If the mutual inductance volatility is less than 30%, proceed to the next optimization step.

[0073] like Figure 8 As shown, Figure 8 This paper illustrates the variation of the mutual inductance between the transmitting coil 1 and the receiving coil 2 of the electromagnetic coupling mechanism with the rotation angle shift under different ratios ε of the minor axis to the major axis of the elliptical transmitting coil 11. Figure 8 It can be seen that, The uniformity of mutual inductance is best when the coefficient of performance (COP) is 0.8. The maximum mutual inductance is 93.79 μH, and the minimum is 83.52 μH. The mutual inductance reaches its maximum value when the receiving coil 2 is rotated to 60°, 180°, and 300°, and its minimum value when rotated to 120° and 240°. The overall mutual inductance distribution exhibits a periodic variation.

[0074] like Figure 9 As shown, Figure 9 The ratio of the minor axis to the major axis of the elliptical transmitting coil 11 with different curved surfaces is shown. Under certain conditions, the mutual inductance between the transmitting coil 1 and the receiving coil 2 of the electromagnetic coupling mechanism varies with the vertical position offset. (This is based on...) Figure 9 It can be seen that when When the coefficient of friction is 0.8, the maximum mutual inductance is 73.58 μH. When the height offset is 40 mm, the mutual inductance fluctuation rate is 20%. When the maximum offset distance is 50 mm, the minimum mutual inductance between the coils is 50.28 μH.

[0075] Therefore, the ratio of the minor axis to the major axis of the arc-shaped elliptical transmitting coil 11 is determined. The value is 0.8, which is the optimized minor axis. b The length is 80mm.

[0076] Step 3: Next, determine the major axis of the arc-shaped elliptical transmitting coil 11. a short axis b After determining the length, the number of turns of the arc-shaped elliptical transmitting coil 11. N1. Perform optimization. If the mutual inductance volatility is less than 20%, proceed to the next optimization step. By comparing the mutual inductance volatility, determine the number of turns for the optimized arc-shaped elliptical transmitting coil 11. N 1 is 30.

[0077] Step 4: Finally, determine the number of turns of the segmented arc-shaped D-type coil 21. N 2. Optimize the electromagnetic coupling mechanism. If the final mutual inductance fluctuation rate is less than 10%, then the optimization of all parameters is complete. Based on the change in mutual inductance fluctuation rate, determine the number of turns of the optimized segmented arc-shaped D-type coil 21. N 2 is 20.

[0078] The specific parameters of the optimized electromagnetic coupling mechanism are shown in Table 1 below:

[0079] Table 1

[0080]

[0081] Figure 10 The magnetic flux density vector distribution diagram of the arc-shaped elliptical transmitting coil 11 shows that the magnetic field lines generated by the arc-shaped elliptical transmitting coil 11 in space are uniform and dense, indicating that the transmitting coil 1 can generate a stable magnetic field at a certain height above it.

[0082] In summary, the electromagnetic coupling mechanism of the wireless power transmission system for the disc-shaped submersible 3 proposed in this application embodiment can well fit the structural characteristics of the disc-shaped submersible 3. Furthermore, the electromagnetic coupling mechanism has good resistance to angular and vertical offsets, ensuring that the transmitting coil 1 and receiving coil 2 of the wireless power transmission system of the disc-shaped submersible 3 can maintain a stable electromagnetic coupling relationship in a dynamic marine environment, thus meeting the usage requirements of the disc-shaped submersible 3.

[0083] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0084] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0085] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible, the electromagnetic coupling mechanism comprising a transmitting coil (1) and a receiving coil (2), characterized in that, The transmitting coil (1) includes multiple arc-shaped elliptical transmitting coils (11); The overall structure of the transmitting coil (1) is circular arc surface, and its overall structure is compatible with the lower half shell of the disc-shaped submersible (3). The plurality of arc-shaped elliptical transmitting coils (11) are uniformly distributed in space; The receiving coil (2) is a segmented arc-shaped D-type coil (21); The arc-shaped elliptical transmitting coil (11) is an elliptical structure coil as a whole, and no coil is set in the middle part of the arc-shaped elliptical transmitting coil (11); The arc-shaped elliptical transmitting coil (11) along its major axis a At both ends of the direction, the curved shape is bent towards the inner side of the circular arc surface of the transmitting coil (1), so that the elliptical arc surface transmitting coil (11) is on the long axis. a The surface is curved in the direction; The plane containing the center of the plurality of arc-shaped elliptical transmitting coils (11) is at the same height as the lowest point of the circular arc surface of the transmitting coil (1). h Not exceeding 1 / 5 of the center height of the disc-shaped submersible (3); The minor axis of the arc-shaped elliptical transmitting coil (11) b The following conditions must be met: b ＜ ； in, P The number of the arc-shaped elliptical transmitting coils (11) is given. e To be at horizontal height h (3) Outer diameter of the hull of the lower disc-shaped submersible.

2. The electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible as described in claim 1, characterized in that, The segmented arc-shaped D-type coil (21) of the receiving coil (2) includes multiple arc-shaped D-type receiving coils (211). The multiple arc-shaped D-type receiving coils (211) are evenly distributed around the bottom circumference of the disc-shaped submersible, and the overall structure of the receiving coils (2) matches the annular connection of the upper and lower shells of the disc-shaped submersible (3).

3. The electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible as described in claim 2, characterized in that, The arc-shaped D-type receiving coil (211) has a rectangular structure with no coil in the middle and both ends bent inward to form an arc surface.

4. The electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible as described in claim 3, characterized in that, The number of the arc-shaped elliptical transmitting coils (11) is equal to the number of the arc-shaped D-type receiving coils (211).

5. The electromagnetic coupling mechanism for a wireless power transmission system for a disc-shaped submersible as described in claim 4, characterized in that, The number of the arc-shaped elliptical transmitting coil (11) and the number of the arc-shaped D-type receiving coil (211) are both three.

6. A method for optimizing the parameters of an electromagnetic coupling mechanism in a wireless power transmission system for a disc-shaped submersible, comprising optimizing the parameters of the electromagnetic coupling mechanism as described in any one of claims 1 to 4, characterized in that, The method includes: Adjust the major axis of the arc-shaped elliptical transmitting coil (11) a With a mutual inductance volatility of less than 40% as the optimization objective, the long axis... a Optimization is performed; the mutual inductance fluctuation rate is based on the mutual inductance value obtained from finite element simulation analysis under different vertical position offsets and rotation angle offsets. M It is obtained through calculation using a formula; Based on optimized major axis a Adjust the short axis of the arc-shaped elliptical transmitting coil (11) b With a mutual inductance volatility of less than 30% as the optimization objective, the short axis... b Optimize; Based on optimized major axis a and short axis b Adjust the number of turns of the arc-shaped elliptical transmitting coil (11) N 1. With the mutual inductance volatility set at less than 20% as the optimization objective, the number of turns is adjusted accordingly. N 1. Optimize; Based on optimized major axis a short axis b and number of turns N 1. Adjust the number of turns of the segmented arc-shaped D-type coil (21). N 2. With the mutual inductance volatility set at less than 10% as the optimization objective, the number of turns was adjusted. N 2. Optimize.

7. The method for optimizing the electromagnetic coupling mechanism parameters of a wireless power transmission system for a disc-shaped submersible as described in claim 6, characterized in that, The formula for calculating the mutual inductance volatility is: Mutual inductance volatility = ; In the formula, The maximum mutual inductance, This represents the minimum mutual inductance.

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