Electromagnetic coupling mechanism of wireless electric energy transmission system for disc type submersible

Abstract

The invention discloses a wireless electric energy transmission system electromagnetic coupling mechanism for a disc type submersible, and relates to the technical field of wireless electric energy transmission, the electromagnetic coupling mechanism comprises a transmitting coil and a receiving coil, the transmitting coil comprises a plurality of cambered elliptical transmitting coils; the plurality of cambered surface elliptic transmitting coils are uniformly and symmetrically distributed in the space, and the whole structure of the cambered surface elliptic transmitting coils is matched with the lower half shell of the disc type submersible; and the receiving coil is a sectional cambered surface D-shaped coil. The electromagnetic coupling mechanism can adapt to special appearance structures of a circular disc type submersible and a seabed base station, and can still keep a stable coupling relation when vertical position deviation and rotation angle deviation occur.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless power transmission, and in particular to an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible, and a method for optimizing parameters of the electromagnetic coupling mechanism. Background Art

[0002] The ocean is rich in natural resources, offering vast potential for application, yet human exploration remains far from sufficient. Therefore, exploring and developing marine resources, including surveying and investigating deep-sea organisms and minerals, is a key area of ​​future marine development. Due to the unique nature of the ocean environment, underwater vehicles, as a crucial means of exploring underwater resources, have been extensively researched and applied.

[0003] The disc-shaped submersible represents a new approach to underwater vehicle design. Its unique shape and structure give it superior autonomous control capabilities, enabling it to move freely and steadily within small areas like reefs and seaweed in the ocean. The disc-shaped submersible boasts stable motion, excellent maneuverability and maneuverability even in harsh operating environments. It can operate on the seabed for extended periods, performing functions difficult for conventional underwater vehicles, such as free takeoff and landing, fixed-point hovering, full-circle steering, and bottom-hugging navigation.

[0004] Wireless power transmission technology, as a safe and reliable method of power transmission, eliminates the constraints of traditional charging cables and is an effective solution for addressing the energy challenges of underwater vehicles operating continuously for extended periods in challenging marine environments. Wireless power refueling systems achieve power transmission through electromagnetic coupling between a transmitting coil located at a seafloor base station and a receiving coil mounted on the submersible. The performance of this electromagnetic coupling mechanism determines key performance indicators such as the power transmission power and efficiency of the wireless power transmission system. Disc-type submersibles are subject to the impact and interference of erratic ocean currents in the marine environment, causing vertical deviations relative to the base station. Furthermore, the disc-shaped structure of the submersible's rotating body makes it susceptible to rotation, resulting in rotational angle deviations.

[0005] Therefore, in order to ensure the stable transmission of electric energy of the circular dish submersible wireless power supply system in the marine environment, it is necessary to combine the special external structure of the circular dish submersible and the submarine base station to design an electromagnetic coupling mechanism with a stable coupling relationship between the power transmitting coil and the receiving coil when vertical position offset and rotation angle offset occur. Summary of the Invention

[0006] The present application provides an electromagnetic coupling mechanism for a wireless power transmission system of a circular dish submersible and a parameter optimization method thereof, which can adapt to the special external structure of the circular dish submersible and the submarine base station, and can maintain a stable coupling relationship when vertical position offset and rotation angle offset occur.

[0007] In the first aspect, an embodiment of the present application provides an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish-type submersible, comprising a transmitting coil and a receiving coil; wherein the transmitting coil comprises a plurality of arc-surface elliptical transmitting coils; the plurality of arc-surface elliptical transmitting coils are evenly and symmetrically distributed in space, and their overall structure fits in with the lower half shell of the circular dish-type submersible; the receiving coil is a segmented arc-surface D-type coil.

[0008] In combination with the first aspect, in one embodiment, the arc-surface elliptical transmitting coil is a coil with a hollow elliptical structure, and the long axis a The two ends are bent inward to form an arc surface.

[0009] In combination with the first aspect, in one embodiment, the height between the plane where the centers of the plurality of arc-surface elliptical transmitting coils are located and the lowest point of the circular arc surface of the transmitting coil is h The height of the horizontal plane where the center of the arc-shaped elliptical transmitting coil is located is not more than 1 / 5 of the center height of the circular dish submersible h Not exceeding 1 / 5 of the center height of the disc-type submersible.

[0010] In combination with the first aspect, in one embodiment, the short axis of the arc-surface elliptical transmitting coil b The following conditions must be met: b < ; in, P is the number of arc-surface elliptical transmitting coils, e At horizontal height h The outer diameter of the lower disc submersible shell.

[0011] In combination with the first aspect, in one embodiment, the segmented arc-surface D-type coil includes multiple arc-surface D-type receiving coils; the multiple arc-surface D-type receiving coils are evenly and symmetrically distributed around the circumference, and their overall structure fits the annular connecting parts of the upper and lower shells of the circular disc-type submersible.

[0012] In combination with the first aspect, in one embodiment, the arc-surface D-shaped receiving coil is a hollow rectangular structure, and both lateral ends are bent inward to form an arc surface.

[0013] In combination with the first aspect, in one implementation, the number of the arcuate elliptical transmitting coils is equal to the number of the arcuate D-shaped receiving coils.

[0014] With reference to the first aspect, in one embodiment, the number of the arcuate elliptical transmitting coils and the number of the arcuate D-shaped receiving coils are both three.

[0015] In a second aspect, an embodiment of the present application further provides a method for optimizing parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible, which optimizes parameters of the electromagnetic coupling mechanism of the wireless power transmission system for the circular dish submersible; the method comprises: Adjust the long axis of the arc-shaped elliptical transmitting coil a , with the mutual inductance fluctuation rate less than 40% as the optimization goal, the long axis a Optimize; the mutual inductance fluctuation rate is based on the mutual inductance value obtained by finite element simulation analysis under different vertical position offsets and rotation angle offsets M , calculated by the formula; Optimized long axis a , adjust the short axis of the arc-shaped elliptical transmitting coil b , with the mutual inductance fluctuation rate less than 30% as the optimization goal, the short axis b Optimize; Optimized long axis a and short axis b , adjust the number of turns of the arc-surface elliptical transmitting coil N 1. With the mutual inductance fluctuation rate less than 20% as the optimization goal, the number of turns N 1. Optimize; Optimized long axis a , short axis b and number of turns N 1. Adjust the number of turns of the segmented arc D-shaped coil N 2. With the mutual inductance fluctuation rate less than 10% as the optimization goal, the number of turns N 2. Optimize.

[0016] In conjunction with the second aspect, in one implementation, the calculation formula for the mutual inductance fluctuation rate is: Mutual inductance fluctuation rate = ; Where, is the maximum mutual inductance, is the minimum mutual inductance.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present application include: In the embodiment of the present application, the transmitting coil comprises multiple arcuate elliptical transmitting coils; the multiple arcuate elliptical transmitting coils are evenly and symmetrically distributed in space, and their overall structure conforms to the lower half of the circular dish submersible, making them well adapted to the unique external structure of the circular dish submersible. Furthermore, considering the structural characteristics of the circular dish submersible, the receiving coil is designed as a segmented arcuate D-shaped coil. This segmented arcuate D-shaped coil ensures that the circular dish submersible stably and efficiently receives electrical energy within a certain charging area. Therefore, the electromagnetic coupling mechanism of the embodiment of the present application can effectively adapt to the unique external structures of the circular dish submersible and the submarine base station, and has the advantage of structural compatibility with the submarine base station and the circular dish submersible. Furthermore, the multiple arcuate elliptical transmitting coils can generate a uniform magnetic field within a certain height range in the vertical direction. Combined with the segmented arcuate D-shaped coil's stable and efficient reception of electrical energy within a certain charging area, this allows the circular dish submersible and the submarine base station to maintain a stable coupling relationship even when vertical position offsets or rotational angle offsets occur, effectively ensuring stable power transmission of the circular dish submersible wireless power transmission system in the marine environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram of a disc-type submersible suitable for the electromagnetic coupling mechanism of this application.

[0020] Figure 2 Schematic diagram of the electromagnetic coupling mechanism of the wireless power transmission system for a circular dish submersible in an embodiment of the present application.

[0021] Figure 3 Schematic diagram of the installation of the electromagnetic coupling mechanism in the embodiment of the present application.

[0022] Figure 4 Schematic diagram of the rotation angle offset of a circular saucer submersible.

[0023] Figure 5 Schematic diagram of the vertical position offset of a circular saucer submersible.

[0024] Figure 6 This is a flow chart of a method for optimizing parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible in an embodiment of the present application.

[0025] Figure 7 A schematic diagram of the specific process of optimizing the parameters of the electromagnetic coupling mechanism in an example.

[0026] Figure 8 Schematic diagram of how the mutual inductance between the transmitting coil and the receiving coil of the electromagnetic coupling mechanism changes with angular offset.

[0027] Figure 9 Schematic diagram of how the mutual inductance between the transmitting coil and the receiving coil of the electromagnetic coupling mechanism changes with vertical position offset.

[0028] Figure 10 This is the magnetic flux density vector distribution diagram of the arc-surface elliptical transmitting coil.

[0029] In the picture: 1. Transmitting coil; 11. Arc elliptical transmitting coil; 2. Receiving coil; 21. Segmented arc-shaped D-shaped coil; 211. Arc-shaped D-shaped receiving coil; 3. Disc-type submersible. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] On the first aspect, the embodiment of the present application provides an electromagnetic coupling mechanism for a wireless power transmission system of a circular dish submersible 3, which can effectively adapt to the special external structure of the circular dish submersible 3 and the submarine base station, and can still maintain a stable coupling relationship when vertical position offset and rotation angle offset occur between the circular dish submersible 3 and the submarine base station, effectively ensuring the stable power transmission of the wireless power transmission system of the circular dish submersible 3 in the marine environment.

[0032] See also Figure 1 , Figure 1 This is a schematic diagram of a disc-type submersible 3 to which the electromagnetic coupling mechanism of this application is applicable. Figure 1 As shown, the disc-type submersible 3 is in the shape of a flat disc. This design helps to reduce underwater resistance and improve navigation efficiency. Generally, it consists of two parts, the upper and lower shells. The connecting part of the shells is generally designed to be annular, and the upper and lower shells are connected by bolts to form an annular connection part between the upper and lower shells. Figure 1 As shown, the height of the annular connection portion of the upper and lower shells of the circular saucer submersible 3 is l , the diameter of the disc-type submersible 3 is d .

[0033] See also Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of an electromagnetic coupling mechanism of a wireless power transmission system for a circular saucer-type submersible 3 in an embodiment of the present application; Figure 3 Schematic diagram of the installation of the electromagnetic coupling mechanism of the wireless power transmission system for the circular saucer submersible 3 in the embodiment of the present 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 a plurality of arc-surface elliptical transmitting coils 11; the plurality of arc-surface elliptical transmitting coils 11 are evenly and symmetrically distributed in space, and their overall structure fits well with the lower half shell of the circular dish-type submersible 3, and can be well adapted to the special external structure of the circular dish-type submersible 3. In addition, considering the structural characteristics of the circular dish-type submersible 3, the receiving coil 2 is designed as a segmented arc-surface D-shaped coil 21. The segmented arc-surface D-shaped coil 21 can ensure that the circular dish-type submersible 3 receives electrical energy stably and efficiently within a certain charging area.

[0034] Among them, such as Figure 2 As shown, the long axis of the arc-surface elliptical transmitting coil 11 is a , short axis is b , then the ratio of the short axis to the long axis of the arc-surface elliptical transmitting coil 11 is Furthermore, the number of turns of the arc-surface elliptical transmitting coil 11 is N 1. The number of turns of the segmented arc-shaped D-shaped coil 21 is N 2. As Figure 3 As shown, the segmented D-shaped receiving coil is installed inside the shell of the circular dish submersible 3 and is located at the annular connection portion of the upper and lower shells. Preferably, the height of the segmented arc-shaped D-shaped coil 21 does not exceed the height of the annular connection portion of the upper and lower shells of the circular dish submersible 3. l Multiple arc-surface elliptical transmitting coils 11 can be integrated into the submarine base station, and their overall shape and structure match the lower half shell of the circular saucer-type submersible 3, so that the electromagnetic coupling mechanism and the circular saucer-type submersible have structural affinity, and thus the submarine base station and the circular saucer-type submersible structure also have structural affinity.

[0035] Depend on Figure 2 and Figure 3It can be seen that in this embodiment, since the transmitting coil 1 includes multiple arc-surface elliptical transmitting coils 11; the multiple arc-surface elliptical transmitting coils 11 are evenly and symmetrically distributed in space, and their overall structure fits well with the lower half shell of the circular saucer type submersible 3, and can be well adapted to the special external structure of the circular saucer type submersible 3; and, considering the structural characteristics of the circular saucer type submersible 3, the receiving coil 2 is designed as a segmented arc-surface D-type coil 21, and the segmented arc-surface D-type coil 21 can ensure that the circular saucer type submersible 3 receives electrical energy stably and efficiently within a certain charging area. Therefore, the electromagnetic coupling mechanism of this embodiment can effectively adapt to the special external structure of the circular saucer type submersible 3 and the submarine base station, and has the advantage of structural affinity for the submarine base station and the circular saucer type submersible 3.

[0036] See also Figure 4 and Figure 5 As shown, Figure 4 Schematic diagram of the rotation angle offset of the circular saucer submersible 3; Figure 5 Schematic diagram of the vertical position offset of the disc-type submersible 3. Figure 4 and Figure 5 As shown, a rectangular coordinate system is established with the center of the circular saucer submersible 3 as the origin, where the height offset is assumed to be Δ h , the angle offset is , then the disc-type submersible 3 occurs relative to position 1 After the angle shifts to position 2, the situation is as follows Figure 4 As shown, the disc-type submersible 3 has a vertical position offset Δ relative to position 1. h The situation at position 2 is as follows Figure 5 shown.

[0037] Depend on Figure 4 and Figure 5 It can be seen that multiple arc-surface elliptical transmitting coils 11 can generate a uniform magnetic field within a certain height range in the vertical direction, and combined with the segmented arc-surface D-type coil 21, they can stably and efficiently receive electrical energy within a certain charging area. When vertical position offset and rotation angle offset occur between the circular dish submersible 3 and the seabed base station, a stable coupling relationship can still be maintained, effectively ensuring the stable power transmission of the wireless power transmission system of the circular dish submersible 3 in the marine environment.

[0038] Furthermore, if Figure 2As shown, in one embodiment, each arc-surface elliptical transmitting coil 11 is a hollow elliptical structure, and the two ends of the long axis are bent inward to form an arc surface. It can be understood that in the process of winding the coil, the more turns the tighter the coupling relationship between the coils is. On the contrary, the coil inside the transmitting coil 1 does not have much effect on improving the mutual inductance. Instead, it will increase the self-inductance of the transmitting coil 1, thereby increasing the power loss of the system. Therefore, in this embodiment, the arc-surface elliptical transmitting coil 11 is designed as a hollow elliptical structure. The design of this hollow structure can better balance the resistance of the transmitting coil 1 and the mutual inductance between the electromagnetic coupling mechanism, so that the mutual inductance between the electromagnetic coupling mechanism meets the system usage requirements, and the resistance of the coil is small, which minimizes the power loss of the system. In addition, the hollow structure coil design can further reduce the use of coils and reduce the cost of the coupler. Moreover, in this embodiment, the arc-surface elliptical transmitting coil 11 is designed to bend inward at both ends of the long axis to form an arc surface, so that the contact area between each arc-surface elliptical transmitting coil 11 and the bottom of the circular disc-type submersible 3 is larger, and it can better fit with the bottom of the circular disc-type submersible 3, thereby avoiding the electromagnetic field generated by the arc-surface elliptical transmitting coil 11 from causing electromagnetic interference to the navigation, control and other electronic components inside the circular disc-type submersible 3.

[0039] Furthermore, also considering that the electromagnetic field generated by the arcuate elliptical transmitting coil 11 may cause electromagnetic interference to the electronic components such as navigation and control inside the circular dish submersible 3, the transmitting coil 1 should be made to fit as close to the bottom of the circular dish submersible 3 as possible. In one embodiment, in combination with the structural layout of the functional modules inside the circular dish submersible 3, the height of the horizontal plane where the center of the arcuate elliptical transmitting coil 11 is designed to be h Limited to not more than 3 center heights of the disc submersible H 1 / 5, that is h ≤ H . 3 center height of circular saucer submersible H and its height H 1 / 5 of Figure 1 shown.

[0040] On this basis, in one embodiment, the short axis of the arc-surface elliptical transmitting coil 11 is further b Design so that the height of the horizontal plane where the center of the arc elliptical transmitting coil 11 is located is h ≤ H Under these conditions, the shape of the designed arc-surface elliptical transmitting coil 11 can adapt to the special external structure of the circular saucer-type submersible 3. Specifically, in this embodiment, the short axis of the arc-surface elliptical transmitting coil 11 is b The following conditions must be met: b < ; in, P is the number of arc-surface elliptical transmitting coils 11, e is the outer diameter of the shell of the circular saucer submersible 3 at the horizontal height h, such as Figure 1 When the above conditions are met, it is possible to avoid the overlap of multiple arc-surface elliptical transmitting coils 11, thereby weakening the coupling relationship between the transmitting coil 1 and the receiving coil 2.

[0041] Further, see Figure 2 and Figure 3 As shown, in one embodiment, the segmented arc-shaped D-shaped coil 21 includes a plurality of arc-shaped D-shaped receiving coils 211; the plurality of arc-shaped D-shaped receiving coils 211 are evenly and symmetrically distributed around the circumference, and their overall structure fits the annular connection portion of the upper and lower shells of the circular saucer-shaped submersible 3, which can have better structural affinity with the circular saucer-shaped submersible 3. More specifically, as Figure 2 As shown, the arc-surface D-shaped receiving coil 211 is a hollow rectangular structure, with both ends curved inward to form an arc. Using the same design principle as the arc-surface elliptical transmitting coil 11 with a hollow structure, this embodiment uses the arc-surface D-shaped receiving coil 211 as a hollow rectangular structure. This hollow structure design can better balance the resistance of the coil and the mutual inductance between the electromagnetic coupling mechanism, thereby achieving a low resistance of the coil when the mutual inductance between the electromagnetic coupling mechanism meets the system's usage requirements, minimizing the system's power loss. In addition, the hollow structure coil design can further reduce the use of coils and reduce costs.

[0042] And, as Figure 2 As shown, the central angle of a single arc-shaped D-shaped receiving coil 211 is β The radius of the arc where the arc D-shaped receiving coil 211 is r It is understandable that the central angle of the arc D-shaped receiving coil 211 is β The setting determines the laying range of the arc D-shaped coil 211. If the central angle β If the setting is small, the self-inductance of the receiving coil is small, and the coupler may not be able to generate enough mutual inductance to transmit power; if the central angle β If the setting is large, the receiving coil will have a larger laying range. Using too many coils will increase the weight, reduce the load capacity of the disc-type submersible 3, and reduce the efficiency of wireless power transmission. r The setting is for different sizes of disc-type submersibles 3. Since the disc-type submersibles 3 of different types and different functions have different structural size parameters, in order to meet the design of receiving coils of disc-type submersibles 3 of different sizes, the arc radius rThe setting of is directly related to the structural parameters of the circular saucer submersible 3. Therefore, in this embodiment, the central angle of the circle to which the single arc-shaped D-shaped receiving coil 211 is subtended is β The value range is designed to be 0°-120°, which meets the above design requirements; and the arc radius of the arc D-shaped receiving coil 211 is r， The size of the disc-shaped submersible 3 can be determined based on its structural parameters. For example, the diameter d The circular disc submersible 3 is 400 mm, and the arc radius of the arc D-shaped receiving coil 211 is r It should be selected as 200mm.

[0043] In practical applications, in order to ensure good structural compatibility and stable electromagnetic coupling between the designed multiple arc-surface elliptical transmitting coils 11 and the multiple arc-surface D-shaped receiving coils 211, the number of arc-surface elliptical transmitting coils 11 and the number of arc-surface D-shaped receiving coils 211 can be designed to be equal.

[0044] Preferably, taking into account the structural structure of the entire disc-type submersible 3 and the ability to resist rotation angle deviation, and considering the cost of the coil and the feasibility in engineering, it is preferred to use three arc-surface elliptical transmitting coils 11 and three arc-surface D-shaped receiving coils 211, such as Figures 2 to 5 shown.

[0045] In a second aspect, embodiments of the present application provide a method for optimizing the parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible 3. This method optimizes the parameters of the electromagnetic coupling mechanism of the wireless power transmission system for the circular dish submersible 3 described in the first aspect. This parameter optimization method optimizes the structural parameters of the electromagnetic coupling mechanism, targeting the uniformity of the mutual inductance between the transmitting coil 1 and the receiving coil 2 under different vertical position offsets and rotational angle offsets. This method ensures that the transmitting coil 1 and the receiving coil 2 of the wireless power transmission system of the circular dish submersible 3 maintain a stable electromagnetic coupling relationship in a dynamic ocean environment.

[0046] See also Figure 6 As shown, Figure 6 Flowchart of the method for optimizing parameters of electromagnetic coupling mechanism of wireless power transmission system for circular saucer submersible 3 in the embodiment of the present application. Figure 6 As shown, in one embodiment, a method for optimizing parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible 3 includes: Step 601: Adjust the long axis of the arc-surface elliptical transmitting coil 11 a , with the mutual inductance fluctuation rate less than 40% as the optimization goal, the long axis a Optimize; the mutual inductance fluctuation rate is the mutual inductance value obtained based on finite element simulation analysis under different vertical position offsets and rotation angle offsetsM , calculated by the formula; optionally, in a specific application, the calculation formula for the mutual inductance fluctuation rate can be as follows: Mutual inductance fluctuation rate = ; Where, is the maximum mutual inductance, is the minimum value of mutual inductance, M is the mutual inductance value obtained based on finite element simulation analysis under different vertical position offsets and rotation angle offsets.

[0047] Step 602: Based on the optimized long axis a , adjust the short axis of the arc elliptical transmitting coil 11 b , with the mutual inductance fluctuation rate less than 30% as the optimization goal, the short axis b Optimize.

[0048] Step 603: Based on the optimized long axis a and short axis b , adjust the number of turns of the arc elliptical transmitting coil 11 N 1. With the mutual inductance fluctuation rate less than 20% as the optimization goal, the number of turns N 1 for optimization.

[0049] Step 604: Based on the optimized long axis a , short axis b and number of turns N 1. Adjust the number of turns of the segmented arc-shaped D-shaped coil 21 N 2. With the mutual inductance fluctuation rate less than 10% as the optimization goal, the number of turns N 2. Optimize.

[0050] It is understood that the mutual inductance between the transmitting coil 1 and the receiving coil 2 directly represents 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-drift capability of the electromagnetic coupling structure of the wireless power transmission system of the circular dish submersible 3. To this end, in this embodiment, the structural parameters of the electromagnetic coupling mechanism are optimized with the mutual inductance uniformity (determined by the mutual inductance fluctuation rate) between the transmitting coil 1 and the receiving coil 2 under different vertical position offsets and rotation angle offsets as the optimization goal. a 、 b 、 N 1. N 2 are optimized in sequence, thereby ensuring that the transmitting coil 1 and the receiving coil 2 of the wireless power transmission system of the circular dish submersible 3 can maintain a stable electromagnetic coupling relationship in a dynamic ocean environment.

[0051] For example, in order to better understand the specific process of the electromagnetic coupling mechanism parameter optimization process of this application, Figure 7As shown in the figure, the overall implementation process of the above-mentioned electromagnetic coupling mechanism parameter optimization method is illustrated using a specific example. In addition, to verify the feasibility and effectiveness of the electromagnetic coupling mechanism provided by the present invention, this example builds an electromagnetic field simulation model of the electromagnetic coupling mechanism, and optimizes the parameters of the electromagnetic coupling mechanism based on the finite element simulation software COMSOL Multiphysics. The structural parameters with the optimal anti-misalignment effect are obtained, and the electromagnetic coupling effect of the electromagnetic coupling mechanism under different vertical position offsets and rotation angle offsets is verified.

[0052] The electromagnetic coupling mechanism used in this example includes three arc-surface elliptical transmitting coils 11 and three arc-surface D-shaped receiving coils 211. The central angle of each arc-surface D-shaped receiving coil 211 is β The inner diameter d of the shell of the applicable circular disc submersible 3 is 400 mm, which is 120° at a horizontal height. h Outer diameter of the lower circular saucer submersible 3 shell e =80mm. Therefore, when the short axis of the arc-surface elliptical transmitting coil 11 b satisfy b < When the short axis of the arc elliptical transmitting coil 11 is b The value range is 10-80mm.

[0053] like Figure 7 As shown, the specific steps for optimizing the electromagnetic coupling mechanism parameters are as follows: Step 1: First, adjust 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 elliptical transmitting coil 11 b The length of the long axis of the arc-shaped elliptical transmitting coil 11 is fixed to 10 mm. a The length of the test sample was increased from 10 mm to 120 mm in steps of 10 mm, and the mutual inductance value obtained based on finite element simulation was used. M Calculate the mutual inductance volatility, mutual inductance volatility = , judge whether the mutual inductance fluctuation rate is less than 40%. After comparing the mutual inductance fluctuation rate, determine the long axis of the optimized arc elliptical transmitting coil 11 a is 100mm.

[0054] Step 2: Then, considering the short axis of the arc-shaped elliptical transmitting coil 11 bThe value range is 10-80mm, so the ratio of the short axis to the long axis of the arc-surface elliptical transmitting coil 11 can be calculated. The value range is 0.1-0.8. Based on the long axis a When the distance is 100mm, adjust the short axis b , making The step size is increased from 0.1 to 0.8, and the mutual inductance value obtained based on finite element simulation is M Calculate the mutual inductance fluctuation rate. If the mutual inductance fluctuation rate is less than 30%, proceed to the next step of optimization.

[0055] like Figure 8 As shown, Figure 8 The figure shows 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 offset under different ratios ε of the minor axis to the major axis of the arc-surface elliptical transmitting coil 11. Figure 8 It can be seen that = 0.8, the mutual inductance is most uniform. The maximum mutual inductance is 93.79 μH, and the minimum is 83.52 μH. Mutual inductance reaches its maximum when receiving coil 2 is rotated to 60°, 180°, and 300°, and reaches its minimum at 120° and 240°. The overall mutual inductance distribution exhibits periodic variation.

[0056] like Figure 9 As shown, Figure 9 The ratio of the short axis to the long axis of the arc-surface elliptical transmitting coil 11 is shown. Under the condition of , the mutual inductance between the transmitting coil 1 and the receiving coil 2 of the electromagnetic coupling mechanism changes with the vertical position offset. Figure 9 It can be seen that when =0.8, the maximum mutual inductance is 73.58μH. When the height offset is 40mm, the mutual inductance fluctuation rate is 20%. When the maximum offset distance is 50mm, the minimum mutual inductance between the coils is 50.28μH.

[0057] Therefore, the ratio of the short axis to the long axis of the arcuate elliptical transmitting coil 11 is determined as follows: is 0.8, which is the optimized short axis b The length is 80mm.

[0058] Step 3: Next, determine the long axis of the arc-shaped elliptical transmitting coil 11. a , short axis b After the length of the arc surface elliptical transmitting coil 11, the number of turns N 1. If the mutual inductance fluctuation rate is less than 20%, the next step of optimization is carried out. After comparing the mutual inductance fluctuation rate, the number of turns of the optimized arc surface elliptical transmitting coil 11 is determined. N 1 is 30.

[0059] Step 4: Finally, the number of turns of the segmented arc-shaped D-shaped coil 21 is N 2. If the final mutual inductance fluctuation rate is less than 10%, the optimization of all parameters of the electromagnetic coupling mechanism is completed. Combined with the change of mutual inductance fluctuation rate, the number of turns of the optimized segmented arc D-shaped coil 21 is determined. N 2 is 20.

[0060] The specific parameters of the optimized electromagnetic coupling mechanism are shown in Table 1 below: Table 1

[0061] Figure 10 is a magnetic flux density vector distribution diagram of the arc-surface elliptical transmitting coil 11. It can be seen that the magnetic lines of force generated by the arc-surface elliptical transmitting coil 11 in space are uniform and dense, which indicates that the transmitting coil 1 can generate a stable magnetic field at a certain height above it.

[0062] To sum up, the electromagnetic coupling mechanism of the wireless power transmission system for the circular disc type submersible 3 proposed in the embodiment of the present application can well fit the structural characteristics of the circular disc type submersible 3, and the electromagnetic coupling mechanism has good resistance to angular deviation and vertical deviation, ensuring that the transmitting coil 1 and the receiving coil 2 of the wireless power transmission system of the circular disc type submersible 3 can maintain a stable electromagnetic coupling relationship in a dynamic ocean environment, meeting the use requirements of the circular disc type submersible 3.

[0063] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0065] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present 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 the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. An electromagnetic coupling mechanism for a wireless power transmission system of a circular dish submersible, the electromagnetic coupling mechanism comprising a transmitting coil (1) and a receiving coil (2), characterized in that: The transmitting coil (1) comprises a plurality of arc-surface elliptical transmitting coils (11); The overall structural layout of the transmitting coil (1) presents a circular arc surface, and its overall structure is compatible with the lower half shell of the circular saucer-type submersible (3); The plurality of arc-surface elliptical transmitting coils (11) are evenly distributed in space; The receiving coil (2) is a segmented arc-surface D-shaped coil (21).

2. The electromagnetic coupling mechanism of the wireless power transmission system for a circular dish submersible according to claim 1, characterized in that: The arc-surface elliptical transmitting coil (11) is an elliptical structure coil as a whole, and no coil is provided in the middle portion of the arc-surface elliptical transmitting coil (11); The arc-surface elliptical transmitting coil (11) is arranged along the long axis a The two ends of the arc surface of the transmitting coil (1) are bent toward the inner side of the arc surface, so that the arc surface elliptical transmitting coil (11) is on the long axis. a The direction is curved.

3. The electromagnetic coupling mechanism of the wireless power transmission system for a circular dish submersible according to claim 2, characterized in that: The height between the plane where the centers of the multiple arc-surface elliptical transmitting coils (11) are located and 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-type submersible (3).

4. The electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to claim 3, characterized in that: The short axis of the arc-surface elliptical transmitting coil (11) b The following conditions must be met: b ＜ ； in, P is the number of arc-surface elliptical transmitting coils (11), e At horizontal height h The outer diameter of the shell of the lower circular disc submersible (3).

5. The electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to any one of claims 1 to 4, characterized in that: The segmented arc-surface D-shaped coil (21) of the receiving coil (2) comprises a plurality of arc-surface D-shaped receiving coils (211); The multiple arc-surface D-shaped receiving coils (211) are evenly distributed around the circumference of the bottom of the circular dish-type submersible, and the overall structure of the receiving coil (2) fits the annular connecting portion of the upper and lower shells of the circular dish-type submersible (3).

6. The electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to claim 5, characterized in that: The arc-surface D-shaped receiving coil (211) is a rectangular structure, with no coil arranged in the middle, and both lateral ends are bent inwards to form an arc surface.

7. The electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to claim 6, characterized in that: The number of the arc-surface elliptical transmitting coils (11) is equal to the number of the arc-surface D-shaped receiving coils (211).

8. The electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to claim 7, characterized in that: The number of the arc-surface elliptical transmitting coils (11) and the number of the arc-surface D-shaped receiving coils (211) are both three.

9. A method for optimizing the parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible, wherein the method optimizes the parameters of the electromagnetic coupling mechanism according to any one of claims 1 to 8, wherein: The method includes: Adjust the long axis of the arc-surface elliptical transmitting coil (11) a , with the mutual inductance fluctuation rate less than 40% as the optimization goal, the long axis a Optimize; the mutual inductance fluctuation rate is based on the mutual inductance value obtained by finite element simulation analysis under different vertical position offsets and rotation angle offsets M , calculated by the formula; Optimized long axis a , adjust the short axis of the arc-surface elliptical transmitting coil (11) b , with the mutual inductance fluctuation rate less than 30% as the optimization goal, the short axis b Optimize; Optimized long axis a and short axis b , adjust the number of turns of the arc-surface elliptical transmitting coil (11) N 1. With the mutual inductance fluctuation rate less than 20% as the optimization goal, the number of turns N 1. Optimize; Optimized long axis a , short axis b and number of turns N 1. Adjust the number of turns of the segmented arc-shaped D-shaped coil (21) N 2. With the mutual inductance fluctuation rate less than 10% as the optimization goal, the number of turns N 2. Optimize.

10. The method for optimizing parameters of an electromagnetic coupling mechanism of a wireless power transmission system for a circular dish submersible according to claim 9, wherein: The calculation formula of the mutual inductance fluctuation rate is: Mutual inductance fluctuation rate = ; Where, is the maximum mutual inductance, is the minimum mutual inductance.

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