Multi-rectangular transmitting coil of wireless power transfer system and assembling method thereof

Abstract

The present application belongs to the field of wireless power transmission, and particularly relates to a multi-rectangular transmitting coil of a wireless power transmission system and an assembling method thereof, aiming to solve the problem that the magnetic field of the existing multiple rectangular coils will cause the magnetic chain and the induced voltage of the receiving coil to fluctuate greatly when the receiving coil moves to the vicinity of the handover area of the adjacent transmitting coil. The present application comprises: in the N rectangular transmitting coils, the first rectangular transmitting coil comprises a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil comprises a left upper and lower plane bending area, a straight area and a right plane bending area; the left upper and lower plane bending area of the i-th rectangular transmitting coil is arranged below the right side of the straight area of the (i-1)-th rectangular transmitting coil as an overlapping area; a magnetic core plate is arranged above the overlapping area, and i is an element of [2, N]. The magnetic field of the present application is relatively uniform in the entire transmitting coil coverage length range, without the need for additional hardware circuits or software algorithms, and the present application has the advantages of less material laying, simple installation and the like.

Description

Technical Field

[0001] This invention belongs to the field of wireless power transmission, and specifically relates to a multi-rectangular transmitting coil of a wireless power transmission system and its assembly method. Background Technology

[0002] When the power supply distance of a wireless power transmission system is long, the transmitting coil also needs to cover a long distance. As the length of the transmitting coil increases, its loss also increases. To reduce this loss, multiple shorter transmitting coils can be used, with power supplied in segments. These transmitting coils are connected end-to-end to form the transmitting area of ​​the entire wireless power transmission system. When the receiving coil of the wireless power transmission system is located within the transmitting area of ​​one or more transmitting coils, only the corresponding transmitting coil is energized, while the remaining transmitting coils are de-energized, thereby reducing transmission coil loss and improving system efficiency.

[0003] Rectangular transmitting coils are a common type of long-range wireless power transmission coil. However, in practical applications, rectangular transmitting coils present several challenges: Firstly, the outer layer of the cable is typically an insulation layer, which becomes thicker when the current is high, preventing the cable conductors on adjacent sides of two rectangular coils from being tightly joined. Secondly, when the transmitting cable is thick, the rectangular transmitting coil cannot achieve a 90° bend, but rather bends at a certain arc. These two factors mean that when adjacent rectangular coils carry the same current, the magnetomotive forces on adjacent sides of the cable cannot completely cancel each other out. Compared to the ideal scenario where the current-carrying conductors on adjacent sides of two rectangular coils completely overlap and the corners are right angles, additional magnetic fields are generated at the junctions and bends of adjacent rectangular coils. This causes the magnetic field formed by multiple connected rectangular coils to differ from that formed by a single rectangular coil of the same total length. Consequently, when the receiving coil moves to the vicinity of the junction area of ​​adjacent transmitting coils, the magnetic flux linkage and induced voltage of the receiving coil fluctuate significantly, reducing the power quality of the wireless power transmission system.

[0004] In existing technologies, to address the voltage fluctuations in the received coil when the wireless power transmission system passes through different zones of the transmitting coil, a regulated DC / DC converter can be added to the receiving end, the transmitting coil current can be dynamically adjusted, or coils with special shapes and numbers of turns can be wound at the beginning and end of the transmitting coil. However, these methods increase the control hardware, require more complex control algorithms, and also increase the complexity of transmitting coil fabrication. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, namely, the large fluctuations in magnetic flux and induced voltage of the receiving coil when the receiving coil moves to the vicinity of the junction area of ​​adjacent transmitting coils due to the conventional segmented power supply of multiple rectangular coils without adding hardware or software, this invention provides a multi-rectangular transmitting coil for a wireless power transmission system, wherein the multi-rectangular transmitting coil includes N rectangular transmitting coils connected end to end and N-1 magnetic core plates.

[0006] Among the N rectangular transmitting coils connected end to end, the first rectangular transmitting coil includes a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil includes a left upper and lower plane bending area, a straight area and a right plane bending area, where i∈[2,N];

[0007] The upper and lower left and planar bending areas of the i-th rectangular transmitting coil are located below and to the right of the straight area of ​​the (i-1)-th rectangular transmitting coil, serving as an overlapping area;

[0008] The magnetic core plate is disposed above the overlapping area.

[0009] In some preferred embodiments, the linear regions of the N rectangular transmitting coils connected end to end are on the same horizontal plane.

[0010] In some preferred embodiments, the left and right upper and lower boundaries of the i-th rectangular transmitting coil and the boundary line between the planar bending area and the straight area coincide with the boundary line between the right planar bending area and the straight area of ​​the (i-1)-th rectangular transmitting coil, so that the right planar bending area of ​​the (i-1)-th rectangular transmitting coil is located in the straight area of ​​the i-th rectangular transmitting coil.

[0011] In some preferred embodiments, the planar bends in the left plane bending area, the left upper and lower plane bending area, and the right plane bending area are one of the following: semi-circular arc bending, elliptical arc bending, and straight line segment combined with bending at set angles on the upper and lower sides.

[0012] In some preferred embodiments, the vertical bends in the left-right and planar bending areas include downward bends and leftward bends.

[0013] In some preferred embodiments, the downward bend and the leftward bend are the minimum bending radius bends of the rectangular transmitting coil material.

[0014] In some preferred embodiments, the center of the magnetic core plate coincides with the center of the overlapping region.

[0015] In some preferred embodiments, the magnetic core plate has its upper and lower edges located adjacent to the upper and lower edges of the straight section, and the distance between its left and right edges is a preset value greater than the length of the overlapping section.

[0016] In some preferred embodiments, the magnetic core plate is used to shield the magnetic field generated by the overlapping area of ​​the rectangular transmitting coil from the influence of the receiving coil.

[0017] In another aspect, the present invention provides a method for assembling a multi-rectangular transmitting coil of a wireless power transmission system. Based on the aforementioned multi-rectangular transmitting coil of the wireless power transmission system, the assembly method includes:

[0018] The left and right sides of N rectangular transmitting coils are bent in a planar manner according to a set method;

[0019] For each of the N-1 rectangular transmitting coils after planar bending, continuously bend downwards and to the left along the boundary line between the left planar bending area and the straight area;

[0020] The rectangular transmitting coil that only undergoes planar bending is used as the first coil of the multi-rectangular transmitting coil. The upper and lower left and planar bending areas of the remaining rectangular transmitting coils are set to the right and below the straight area of ​​the previous rectangular transmitting coil as an overlapping area.

[0021] Adjust the vertical and horizontal positions of each rectangular transmitting coil so that the straight areas of the N rectangular transmitting coils connected end to end are on the same horizontal plane, and the boundary lines of the left vertical and horizontal and planar bending areas of the i-th rectangular transmitting coil and the right planar bending area of ​​the (i-1)-th rectangular transmitting coil coincide with the boundary line of the right planar bending area of ​​the (i-1)-th rectangular transmitting coil.

[0022] A magnetic core plate is placed on the overlapping area, such that the center of the magnetic core plate coincides with the center of the overlapping area, thus completing the assembly of the multi-rectangular transmitting coil of the wireless power transmission system.

[0023] The beneficial effects of this invention are:

[0024] (1) The wireless power transmission system of the present invention has multiple rectangular transmitting coils, which overlap adjacent coils and set a shielded magnetic core plate in the overlapping area. This effectively weakens or even eliminates the magnetic field changes at the junction of adjacent rectangular transmitting coils, making the magnetic field formed by the combination of multiple rectangular transmitting coils more uniform throughout the entire coverage length, and reducing the receiving voltage fluctuation when the receiving coil passes through the junction area of ​​transmitting coils in different zones.

[0025] (2) The multi-rectangular transmitting coil of the wireless power transmission system of the present invention does not require additional hardware circuits or software algorithms for voltage regulation control of the receiving side output voltage, and the laying materials are less and the installation is simpler. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram showing the division of the left-side single rectangular transmitting coil region and the relative positions of each region in one embodiment of the wireless power transmission system of the present invention.

[0028] Figure 2 This is a schematic diagram showing the right-side division of a single rectangular transmitting coil region and the relative positions of each region in one embodiment of the wireless power transmission system of the present invention with respect to multiple rectangular transmitting coils;

[0029] Figure 3 This is a schematic diagram of the left-side rectangular transmitting coil and the magnetic core board assembly of one embodiment of the wireless power transmission system of the present invention;

[0030] Figure 4 This is a schematic diagram of the assembly of the right-side rectangular transmitting coil and the magnetic core board in one embodiment of the wireless power transmission system of the present invention;

[0031] Figure 5 This is a schematic diagram of the left-side assembly of multiple rectangular transmitting coils and a magnetic core board in one embodiment of the wireless power transmission system of the present invention.

[0032] Figure 6 This is a schematic diagram of the assembly of multiple rectangular transmitting coils and a magnetic core board in the right direction of one embodiment of the wireless power transmission system of the present invention. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] This invention provides a multi-rectangular transmitting coil for a wireless power transmission system, which can weaken or eliminate magnetic field changes at the junction of adjacent rectangular transmitting coils, making the transmitting magnetic field formed by the combination of multiple rectangular transmitting coils more uniform over the entire coverage length. This reduces the receiving voltage fluctuation when the receiving coil passes through the junction area of ​​transmitting coils in different zones. Furthermore, the multi-rectangular transmitting coil of this invention does not require additional hardware circuitry or software algorithms for receiving-side output voltage regulation and control, and has advantages such as less laying material and simple installation.

[0036] The present invention provides a multi-rectangular transmitting coil for a wireless power transmission system, wherein the multi-rectangular transmitting coil comprises N rectangular transmitting coils connected end to end and N-1 magnetic core plates;

[0037] Among the N rectangular transmitting coils connected end to end, the first rectangular transmitting coil includes a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil includes a left upper and lower plane bending area, a straight area and a right plane bending area, where i∈[2,N];

[0038] The upper and lower left and planar bending areas of the i-th rectangular transmitting coil are located below and to the right of the straight area of ​​the (i-1)-th rectangular transmitting coil, serving as an overlapping area;

[0039] The magnetic core plate is disposed above the overlapping area.

[0040] To more clearly illustrate the multiple rectangular transmitting coils of the wireless power transmission system of the present invention, the following detailed description of each module in the embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0041] The wireless power transmission system of the first embodiment of the present invention includes N rectangular transmitting coils connected end to end and N-1 magnetic core plates. The modules are described in detail below:

[0042] Among the N rectangular transmitting coils connected end to end, the first rectangular transmitting coil includes a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil includes a left upper and lower plane bending area, a straight area and a right plane bending area, where i∈[2,N].

[0043] The difference between each rectangular transmitting coil and an ideal rectangular coil lies in the fact that, when the cable used for the transmitting coil is thicker, the four corners of the rectangular transmitting coil are not right angles, but rather the cable is bent with an appropriate turning radius. Based on the actual shape of the rectangular transmitting coil, each rectangular transmitting coil is divided into a central straight section, a left-plane bending section or a left-upper-lower-left plane bending section, and a right-plane bending section or a right-upper-lower-right plane bending section. Within the straight section, the cable consists of two parallel straight lines forming the two longer sides of the rectangle. In the left and right plane bending sections or the upper and lower plane bending sections, the two cables from the straight section are bent and connected on the left and right sides with a certain arc.

[0044] The transmitting and receiving coils of a wireless power transmission system can be placed vertically in a horizontal plane or horizontally in a vertical plane. This invention further illustrates the concept using the example of the transmitting and receiving coils being placed vertically in a horizontal plane; the structure and assembly method for a vertical plane can be deduced similarly.

[0045] In order to ensure that the straight sections of the overlapping coils are in the same plane, a section of the adjacent coil is bent vertically.

[0046] The planar bends in the left plane bend area, the upper and lower left plane bend area, and the right plane bend area are one of the following: semi-circular arc bend, elliptical arc bend, and straight line segment combined with bends with set angles on the upper and lower sides.

[0047] like Figure 1 The diagram shows the left-side region division and relative positions of a single rectangular transmitting coil in an embodiment of the wireless power transmission system of the present invention. In this embodiment, the plane of the rectangular transmitting coil is bent into a semi-circular arc. The first rectangular transmitting coil has only a left-side plane bend and a right-side plane bend. The remaining rectangular transmitting coils have both a plane bend and an up-and-down bend on the left side. Specifically, the operation involves continuously bending downwards and to the left along the boundary line between the left-side plane bend area and the straight area.

[0048] The bending points in the left, upper, lower, and planar bending areas include downward bending and leftward bending. The downward and leftward bending points represent the minimum bending radius of the rectangular transmitting coil material.

[0049] The upper and lower left sides and the planar bending area of ​​the i-th rectangular transmitting coil are located below and to the right of the straight area of ​​the (i-1)-th rectangular transmitting coil, forming an overlapping area. That is, the upper and lower left sides and the planar bending area of ​​the i-th rectangular transmitting coil are located below the straight area of ​​the (i-1)-th rectangular transmitting coil, and the right planar bending area of ​​the (i-1)-th rectangular transmitting coil extends entirely into the straight area of ​​the i-th rectangular transmitting coil. The area where the (i-1)-th and i-th rectangular transmitting coils overlap is called the overlapping area.

[0050] A multi-rectangular transmitting coil, wherein the straight sections of the N rectangular transmitting coils connected end to end are on the same horizontal plane, and the boundary lines of the left, upper and lower left and planar bending areas of the i-th rectangular transmitting coil and the straight section coincide with the boundary line of the right planar bending area of ​​the (i-1)-th rectangular transmitting coil and the straight section.

[0051] The rectangular transmitting coil can be arranged with the left rectangular transmitting coil overlapping the right rectangular transmitting coil, or the left rectangular transmitting coil can be arranged with the right rectangular transmitting coil overlapping the right rectangular transmitting coil.

[0052] like Figure 2 The diagram shows the right-side region division and relative positions of a single rectangular transmitting coil in an embodiment of the wireless power transmission system of the present invention. In this embodiment, the plane of the rectangular transmitting coil is bent into a semi-circular arc. The last rectangular transmitting coil has only a left-side plane bend and a right-side plane bend. The remaining rectangular transmitting coils have both a plane bend and an up-and-down bend on the right side. Specifically, the operation involves continuously bending downwards and to the right along the boundary line between the right-side plane bend area and the straight area.

[0053] A magnetic core plate is placed above the overlapping area. The center of the magnetic core plate coincides with the center of the overlapping area. The upper and lower sides of the magnetic core plate are located on the inner side of the upper and lower sides of the straight area of ​​the rectangular transmitting coil (the width of the magnetic core plate is equal to the width of the straight area, or slightly smaller than the width of the straight area). The distance between its left and right sides is a preset value greater than the length of the overlapping area.

[0054] The longer the magnetic core plate, the better the magnetic shielding effect in the bending area. In practical applications, the magnetic core plate can be set according to the error accuracy requirements of magnetic field fluctuations.

[0055] The thickness of the magnetic core plate should be minimized while ensuring that the magnetic core remains unsaturated under the rated operating conditions of the system.

[0056] The assembly method of the multi-rectangular transmitting coil of the wireless power transmission system according to the second embodiment of the present invention, based on the multi-rectangular transmitting coil of the wireless power transmission system described above, includes:

[0057] The left and right sides of N rectangular transmitting coils are bent in a planar manner according to a set method;

[0058] For each of the N-1 rectangular transmitting coils after planar bending, continuously bend downwards and to the left along the boundary line between the left planar bending area and the straight area;

[0059] The rectangular transmitting coil that only undergoes planar bending is used as the first coil of the multi-rectangular transmitting coil. The upper and lower left and planar bending areas of the remaining rectangular transmitting coils are set to the right and below the straight area of ​​the previous rectangular transmitting coil as an overlapping area.

[0060] Adjust the vertical and horizontal positions of each rectangular transmitting coil so that the straight areas of the N rectangular transmitting coils connected end to end are on the same horizontal plane, and the boundary lines of the left vertical and horizontal and planar bending areas of the i-th rectangular transmitting coil and the right planar bending area of ​​the (i-1)-th rectangular transmitting coil coincide with the boundary line of the right planar bending area of ​​the (i-1)-th rectangular transmitting coil.

[0061] A magnetic core plate is placed on the overlapping area, such that the center of the magnetic core plate coincides with the center of the overlapping area, thus completing the assembly of the multi-rectangular transmitting coil of the wireless power transmission system.

[0062] Assume the receiving coil of the wireless power transmission system is located above the transmitting coil. The cable winding the rectangular transmitting coil is designed so that the straight section and the right-hand bend section are on the same horizontal plane. At the junction of the left-hand top-bottom and the bend section with the straight section, the cable is bent downwards and then horizontally extended, causing the left-hand top-bottom and bend sections to shift downwards, forming a rectangular transmitting coil in the left direction. Figure 1 As shown in the diagram. A schematic diagram of the rectangular transmitting coil and magnetic core board assembly in the left direction is shown below. Figure 3As shown, adjust the positions of two adjacent rectangular transmitting coils so that their straight sections are connected. First, adjust the height of the two adjacent rectangular transmitting coils vertically so that their straight sections are on the same horizontal plane. Then, adjust their positions on this horizontal plane.

[0063] for Figure 1 As shown, moving two adjacent rectangular transmitting coils horizontally causes the boundary line between the straight section and the right planar bend of the left transmitting coil to coincide with the boundary line between the straight section and the left-right-upper-lower and planar bend of the right transmitting coil. The right planar bend of the left transmitting coil nests into the straight section of the right transmitting coil, while the left-right-upper-lower and planar bend of the right transmitting coil extends below the straight section of the left transmitting coil. This ensures that the straight sections of the left and right transmitting coils are closely connected. Figure 3 As shown in the diagram. The final assembly diagram of the multiple rectangular transmitting coils and the magnetic core board in the left direction is as follows. Figure 5 As shown.

[0064] Assume the receiving coil of the wireless power transmission system is located above the transmitting coil. The cable winding the rectangular transmitting coil is designed so that the straight section and the left-side planar bend section are on the same horizontal plane. At the junction of the right-side up-down and planar bend sections and the straight section, the cable is bent downwards and then horizontally extended, causing the right-side up-down and planar bend sections to shift downwards, forming a right-side rectangular transmitting coil. Figure 2 As shown in the diagram. A schematic diagram of the rectangular transmitting coil and magnetic core board assembly on the right is shown below. Figure 4 As shown, adjust the positions of two adjacent rectangular transmitting coils so that their straight sections are connected. First, adjust the height of the two adjacent rectangular transmitting coils vertically so that their straight sections are on the same horizontal plane. Then, adjust their positions on this horizontal plane.

[0065] for Figure 2 As shown, moving two adjacent rectangular transmitting coils horizontally causes the boundary line between the straight section and the upper / lower right and planar bending section of the left transmitting coil to coincide with the boundary line between the straight section and the left planar bending section of the right transmitting coil. The upper / lower right and planar bending section of the left transmitting coil extends below the straight section of the right transmitting coil, while the left planar bending section of the right transmitting coil nests into the straight section of the left transmitting coil. This ensures that the straight sections of the left and right transmitting coils are closely connected. Figure 4 As shown in the diagram. The final assembly diagram of multiple rectangular transmitting coils and the magnetic core board in the right direction is as follows. Figure 6 As shown.

[0066] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process and related explanations of the methods described above can be found in the corresponding processes in the foregoing system embodiments, and will not be repeated here.

[0067] It should be noted that the assembly method of the multi-rectangular transmitting coil of the wireless power transmission system provided in the above embodiments is only an example of the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be merged into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the various modules or steps and are not considered as an improper limitation of the present invention.

[0068] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0069] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0070] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A multi-rectangular transmitting coil of a wireless power transfer system, characterized by, The multi-rectangular transmitting coil includes N rectangular transmitting coils connected end to end and N-1 magnetic core plates; Among the N rectangular transmitting coils connected end to end, the first rectangular transmitting coil includes a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil includes a left upper and lower plane bending area, a straight area and a right plane bending area, where i∈[2,N]; The upper and lower left and planar bending areas of the i-th rectangular transmitting coil are located below and to the right of the straight area of ​​the (i-1)-th rectangular transmitting coil, serving as an overlapping area; The magnetic core plate is disposed above the overlapping area; The N rectangular transmitting coils connected end to end have their straight sections on the same horizontal plane. The left and right upper and lower boundaries of the i-th rectangular transmitting coil and the boundary line between the planar bending area and the straight area coincide with the boundary line between the right planar bending area and the straight area of ​​the (i-1)-th rectangular transmitting coil, so that the right planar bending area of ​​the (i-1)-th rectangular transmitting coil is located in the straight area of ​​the i-th rectangular transmitting coil.

2. A multi-rectangular transmit coil of a wireless power transfer system according to claim 1, characterized in that, The planar bends in the left plane bend area, the left upper and lower plane bend areas, and the right plane bend area are one of the following: semi-circular arc bends, elliptical arc bends, and straight line segments combined with bends at set angles on the upper and lower sides.

3. The multi-rectangular transmit coil of a wireless power transfer system of claim 1, wherein, The vertical bends in the left, upper, lower, and planar bending areas include downward bends and leftward bends.

4. A multi-rectangular transmit coil of a wireless power transfer system according to claim 3, characterized in that, The downward bend and the leftward bend are the minimum bending radius bends of the rectangular transmitting coil material.

5. The multi-rectangular transmit coil of a wireless power transfer system of claim 1, wherein, The center of the magnetic core plate coincides with the center of the overlapping area.

6. A multi-rectangular transmit coil of a wireless power transfer system according to claim 5, characterized in that, The magnetic core plate has its top and bottom edges located adjacent to the top and bottom edges of the straight section, and the distance between its left and right edges is a preset value greater than the length of the overlapping section.

7. A multi-rectangular transmit coil of a wireless power transfer system according to claim 6, characterized in that, The magnetic core plate is used to shield the magnetic field generated by the overlapping area of ​​the rectangular transmitting coil from the influence of the receiving coil.

8. A method of assembling a multi-rectangular transmitting coil of a wireless power transfer system, characterized in that, Based on the multi-rectangular transmitting coil of the wireless power transmission system according to any one of claims 1-7, the assembly method includes: The left and right sides of N rectangular transmitting coils are bent in a planar manner according to a set method; For each of the N-1 rectangular transmitting coils after planar bending, continuously bend downwards and to the left along the boundary line between the left planar bending area and the straight area; The rectangular transmitting coil that only undergoes planar bending is used as the first coil of the multi-rectangular transmitting coil. The upper and lower left and planar bending areas of the remaining rectangular transmitting coils are set to the right and below the straight area of ​​the previous rectangular transmitting coil as an overlapping area. Adjust the vertical and horizontal positions of each rectangular transmitting coil so that the straight areas of the N rectangular transmitting coils connected end to end are on the same horizontal plane, and the boundary lines of the left vertical and horizontal and planar bending areas of the i-th rectangular transmitting coil and the right planar bending area of ​​the (i-1)-th rectangular transmitting coil coincide with the boundary line of the right planar bending area of ​​the (i-1)-th rectangular transmitting coil. A magnetic core plate is placed on the overlapping area, such that the center of the magnetic core plate coincides with the center of the overlapping area, thus completing the assembly of the multi-rectangular transmitting coil of the wireless power transmission system.

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