A magnetic field closed coil

Abstract

This utility model relates to the field of magnetic field inductance technology and discloses a magnetic field enclosed coil, comprising: an inductor coil, with connection terminals suitable for communication with external circuits at both the beginning and end of the inductor coil, the connection terminals including an input terminal and an output terminal, the projections of the input terminal and the output terminal not overlapping; a connecting piece connected to at least one of the connection terminals; along the axial direction of the inductor coil, the projection of the connecting piece of one connection terminal overlaps with that of another connection terminal, and / or, the projection of the connecting piece of one connection terminal overlaps with that of another connection terminal. By designing the inductor coil as a ring structure and setting spatially staggered connection terminals at the beginning and end, efficient magnetic field enclosure and effective suppression of electromagnetic interference are achieved. The terminal layout with non-overlapping axial projections significantly reduces end leakage magnetic field, allowing magnetic lines of force to form a closed loop inside the ring coil, thereby improving magnetic field uniformity and energy transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of magnetic field inductance technology, specifically to a closed magnetic field coil. Background Technology

[0002] A closed magnetic field coil is an electromagnetic structure in which the two ends of the coil terminate at conductive electrodes. Current flows through the electrodes to form a current loop or to generate a closed magnetic field by applying an excitation voltage. The spacing and connection method of the electrodes affect the closure of the magnetic field, system impedance, and electromagnetic efficiency. If the electrodes are too close together, it may cause arcing or parasitic capacitance, while if the distance is too far, it may lead to magnetic field leakage or increased loop impedance. This design is commonly used in applications requiring precise control of the magnetic field, such as electromagnetic sensors and transformers.

[0003] In the prior art, if the two electrodes of the closed magnetic field coil are too close together, it may cause arc discharge between the electrodes, increase parasitic capacitance, or cause overheating due to excessive local current density; if the electrodes are too far apart, it will lead to poor magnetic field closure, increased leakage flux, increased circuit resistance and inductance, and may reduce mechanical stability due to loose structure. Utility Model Content

[0004] In view of this, the present invention provides a magnetic field enclosed coil to solve the problem of magnetic leakage caused by poor enclosure effect of magnetic field coils in the prior art.

[0005] This utility model provides a magnetic field closed coil, comprising:

[0006] An inductor coil is constructed as a ring. Both the beginning and end of the inductor coil are provided with connection terminals suitable for conducting with external circuits. The connection terminals include an input terminal and an output terminal, which are spaced apart and whose projections do not overlap along the axial direction of the inductor coil.

[0007] A connecting piece, which is connected to at least one of the connecting terminals;

[0008] Along the axial direction of the inductor coil, the connecting piece of one of the connecting terminals overlaps with the projection of the connecting piece of another connecting terminal, and / or, the connecting piece of one of the connecting terminals overlaps with the projection of the connecting piece of another connecting terminal.

[0009] Beneficial effects: By designing the inductor coil as a ring structure and setting spatially staggered connection terminals at both ends, efficient magnetic field enclosure and effective suppression of electromagnetic interference are achieved. The non-overlapping terminal layout in axial projection significantly reduces end magnetic leakage, allowing magnetic lines of force to form a closed loop inside the ring coil, thereby improving magnetic field uniformity and energy transmission efficiency. The overlapping design of the connecting pieces creates a three-dimensional wiring space, which not only saves installation area but also blocks external interference by forming an electromagnetic shielding layer.

[0010] In one alternative embodiment, the inductor includes at least one sub-coil, which is configured as a ring, and the input and output ends of the sub-coil are in the same plane in a plane perpendicular to the axial direction of the sub-coil.

[0011] Beneficial effects: By dividing the inductor coil into at least one sub-coil and ensuring that the input and output terminals of the sub-coil are on the same plane, the manufacturing process and assembly flow of the coil are simplified. This also improves the symmetry of the coil and the uniformity of the magnetic field distribution, facilitates the installation and positioning of connecting pieces, and enhances the stability of the structure.

[0012] In one alternative embodiment, the connecting piece has a bent structure and includes an axial extension and a radial extension. The axial extension is adapted to extend along the axial direction of the sub-coil so that the radial extension and another connecting terminal are staggered along the axial direction of the sub-coil.

[0013] Beneficial effects: The connecting piece adopts a bent structure, including axial and radial extensions, which enables staggered arrangement of connecting terminals, further optimizing spatial layout. It reduces interference between the connecting piece and other components, improves the reliability of electrical connections, and facilitates complex circuit layouts within limited space. The axial extension forms a vertical current component, which, together with the radial extension, constitutes an orthogonal electromagnetic field, effectively counteracting edge magnetic flux leakage.

[0014] In one alternative embodiment, the extending direction of the axial extension is set at an angle to the tangential direction of the annular structure of the inductor coil.

[0015] Beneficial effects: The axial extension is angled to the tangent of the inductor coil, effectively dispersing electromagnetic interference and reducing eddy current losses. It optimizes the magnetic field distribution, improves coil efficiency, and enhances the mechanical strength of the structure.

[0016] In one optional embodiment, the input terminal and the output terminal are respectively provided with connecting pieces; the connecting piece connected to the output terminal and the connecting piece connected to the input terminal are respectively provided on both sides of the inductor coil along the axial direction.

[0017] Beneficial effects: By placing connecting pieces at the input and output ends and arranging them on opposite sides of the inductor coil's axis, symmetry and balance in the electrical connection are achieved. This reduces signal transmission interference, improves circuit stability, and facilitates the expansion and integration of multi-coil systems.

[0018] In one alternative implementation, the connector is made of a conductive material.

[0019] Beneficial effects: The connecting piece is made of conductive material, which ensures high efficiency and low loss of current transmission, improves the overall performance of the coil, reduces the risk of overheating, and extends the service life of the equipment.

[0020] In one alternative embodiment, the ring structure of the inductor coil is a continuously wound integrated structure, with each turn of the coil having the same winding curvature and being stacked along the axial direction to form a closed magnetic field confinement space.

[0021] Beneficial effects: The inductor coil adopts a continuous winding integrated structure with consistent winding curvature, forming a closed magnetic field confinement space, which significantly improves the sealing effect and uniformity of the magnetic field, further reduces magnetic leakage, improves energy conversion efficiency, and enhances the mechanical stability of the structure.

[0022] In one alternative implementation, the connecting piece and the connecting terminal are detachably connected.

[0023] Beneficial effects: The connecting piece and the connecting terminal are detachable, which facilitates maintenance and replacement, reduces the cost of use, improves the flexibility and maintainability of the equipment, and simplifies the production and assembly process.

[0024] In one alternative implementation, the connection terminal is provided with a slot adapted to the shape of the external electrode.

[0025] Beneficial effects: The connection terminal is equipped with slots that are compatible with external electrodes, enabling fast and stable electrical connections, reducing contact resistance, improving signal transmission quality, simplifying installation steps, and enhancing the user experience.

[0026] In one alternative embodiment, the connecting piece is connected to an insulating support structure, which is adapted to be disposed between the connection of one of the connecting terminals and the connecting piece of the other terminal.

[0027] Beneficial effects: The connecting plates are connected by an insulated support structure, which can effectively isolate electrical interference between different connecting plates, enhance the safety and reliability of the equipment, and provide additional mechanical support, thus extending the service life. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the magnetic field closed coil of this utility model;

[0030] Figure 2 This is a top view of the magnetic field closed coil of this utility model;

[0031] Figure 3 This is a modified form of the magnetic field closed coil connecting piece of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Inductor coil; 2. Input terminal; 3. Output terminal; 4. Connecting piece; 41. Axial extension; 42. Radial extension. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] When the electrodes of a closed magnetic field coil are too close together, several negative effects can occur. First, the high potential difference between the electrodes, especially at close intervals, can easily break down the air or insulating medium, leading to arcing, which not only wastes energy but can also damage the electrode surface. Second, excessively close spacing increases parasitic capacitance between the electrodes, causing signal coupling or phase distortion in high-frequency applications and reducing electromagnetic efficiency. Furthermore, current will concentrate in the narrow area adjacent to the electrodes, causing a sudden increase in local current density, leading to Joule overheating and even ablation of the electrode material. These problems are particularly pronounced in high-voltage or high-current applications and need to be mitigated by optimizing insulation design or adjusting the electrode shape.

[0039] If the electrode spacing is too large, the closed path of the magnetic field will be lengthened, causing some magnetic lines of force to be unable to be effectively confined inside the coil, resulting in increased leakage flux and reduced magnetic field uniformity and strength. Simultaneously, the loop resistance and inductance increase with the length of the conductor, not only increasing energy consumption but also potentially affecting the system's dynamic response. Structurally, excessive spacing weakens the overall rigidity of the coil, making it prone to deformation under mechanical vibration or thermal expansion and contraction, further affecting the stability of the magnetic field.

[0040] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0041] According to an embodiment of the present invention, a magnetic field closed coil is provided, comprising: an inductor coil 1, the inductor coil 1 being ring-shaped, and connection terminals suitable for conducting with an external circuit being provided at both the beginning and end of the inductor coil 1, the connection terminals including an input terminal 2 and an output terminal 3, the input terminal 2 and the output terminal 3 being spaced apart, and the projections of the input terminal 2 and the output terminal 3 not overlapping along the axial direction of the inductor coil 1; a connecting piece 4, the connecting piece 4 being connected to at least one of the connection terminals; and / or, the projections of the connecting piece 4 of one connection terminal overlapping with the projections of the connecting piece 4 of the other connection terminal along the axial direction of the inductor coil 1.

[0042] By designing the inductor coil 1 as a ring structure and setting spatially staggered connecting terminals at both ends, efficient magnetic field enclosure and effective suppression of electromagnetic interference are achieved. The non-overlapping terminal layout in axial projection significantly reduces end leakage magnetic field, allowing magnetic lines of force to form a closed loop inside the ring coil, thereby improving magnetic field uniformity and energy transmission efficiency. The overlapping design of the connecting piece 4 creates a three-dimensional wiring space, which not only saves installation area but also blocks external interference by forming an electromagnetic shielding layer.

[0043] Furthermore, by embedding a magnetic core structure inside the toroidal inductor coil 1, the magnetic permeability of the magnetic field is significantly improved and eddy current losses are reduced. Multiple magnetic core segments are arranged in the cavity of the toroidal inductor coil 1. The magnetic cores are made of nanocrystalline alloy strips wound with their axis aligned with the coil axis, so that the magnetic lines of force form a closed loop path along the magnetic core.

[0044] To further optimize connection performance, connector 4 is precisely calculated and designed to form a stable connection with at least one connector terminal. When viewed from an axial perspective, a carefully designed overlapping area is clearly visible between connector 4 of one connector terminal and another connector terminal, and a specific overlapping relationship is also formed between connector 4 of the two connector terminals. This three-dimensional overlapping design not only saves installation space but, more importantly, creates a three-dimensional electromagnetic shielding network. Through this innovative ring structure and spatially staggered terminal layout, efficient magnetic field containment and active suppression of electromagnetic interference are successfully achieved. The non-overlapping characteristic of axial projection significantly reduces the end magnetic leakage problem common in traditional designs, allowing magnetic lines of force to form a near-perfect closed loop inside the ring coil, thereby greatly improving the uniformity of the magnetic field and the overall efficiency of energy transmission. The intelligent overlapping design of connector 4 creates a three-dimensional wiring space. This design not only saves installation area but also effectively blocks the intrusion of external interference signals by forming a multi-layered electromagnetic shielding structure.

[0045] Specifically, the connecting piece 4 is detachably connected to the connecting terminal. This detachable connection facilitates maintenance and replacement, reduces operating costs, improves equipment flexibility and maintainability, and simplifies the production and assembly process. The specific implementation of the detachable connection can be varied, including but not limited to various mechanical connection methods such as threaded connections, snap-fit ​​connections, and spring clip connections, as well as semi-permanent connection solutions such as conductive adhesive bonding.

[0046] In some embodiments, combined with Figure 1 As shown, the inductor coil 1 includes at least one sub-coil, which is constructed as a ring. In a plane perpendicular to the axial direction of the sub-coil, the input terminal 2 and output terminal 3 of the sub-coil are located in the same plane. By dividing the inductor coil 1 into at least one sub-coil and ensuring that the input terminal 2 and output terminal 3 of the sub-coil are in the same plane, the manufacturing process and assembly flow of the coil are simplified. This also improves the symmetry of the coil and the uniformity of the magnetic field distribution, facilitates the installation and positioning of the connecting piece 4, and enhances the stability of the structure.

[0047] As a form of implementation, combined Figure 3As shown, the connecting piece 4 has a bent structure, including an axial extension 41 and a radial extension 42. The axial extension 41 is adapted to extend along the axial direction of the sub-coil, so that the radial extension 42 and another connecting terminal are staggered along the axial direction of the sub-coil. The bent structure of the connecting piece 4, including the axial extension 41 and the radial extension 42, enables staggered arrangement between connecting terminals, further optimizing the spatial layout. It reduces interference between the connecting piece 4 and other components, improves the reliability of electrical connections, and facilitates complex circuit layouts within a limited space. The axial extension 41 forms a vertical current component, which, together with the radial extension 42, constitutes an orthogonal electromagnetic field, effectively counteracting edge magnetic flux leakage.

[0048] Of particular note is that the axial extension 41 generates a specific current component in the vertical direction, which, together with the current in the radial extension 42, forms an orthogonal electromagnetic field distribution. This design effectively counteracts edge magnetic flux leakage and improves overall electromagnetic performance. The bending angle can be adjusted within the range of 30-150 degrees according to specific application scenarios to achieve optimal performance.

[0049] Furthermore, the extending direction of the axial extension 41 is set at an angle to the tangential direction of the annular structure of the inductor coil 1. This angled arrangement effectively disperses electromagnetic interference and reduces eddy current losses. It optimizes the magnetic field distribution, improves the coil's operating efficiency, and enhances the mechanical strength of the structure.

[0050] In some embodiments, combined with Figure 1 As shown, input terminal 2 and output terminal 3 are each provided with a connecting piece 4; the connecting piece 4 connected to output terminal 3 and the connecting piece 4 connected to input terminal 2 are respectively located on both sides of the inductor coil 1 along the axial direction. The connection pieces 4 on input terminal 2 and output terminal 3, and their arrangement on both sides of the inductor coil 1 along the axial direction, achieve symmetry and balance in the electrical connection. This reduces signal transmission interference, improves circuit stability, and facilitates the expansion and integration of multi-coil systems.

[0051] Specifically, the connecting piece 4 is made of a conductive material, preferably a highly conductive material such as high-purity copper, copper alloy, or specially treated iron-based material. These materials undergo precision machining and surface treatment to ensure efficient current transmission and low-loss characteristics. The use of highly conductive materials brings multiple advantages, improving the overall performance of the coil, effectively reducing the risk of overheating during operation, and extending the service life and reliability of the equipment. Silver or gold plating can also be applied to the surface of the connecting piece 4 to further improve high-frequency performance. Simultaneously, its surface can undergo anti-oxidation treatment or insulating coating treatment to meet the requirements of use in different environments.

[0052] It is worth noting that the toroidal structure of inductor coil 1 is a continuously wound, integrated structure. The curvature of each turn of the coil is consistent, and they are stacked along the axial direction to form a closed magnetic field confinement space. The continuous, integrated structure of inductor coil 1, with its consistent curvature, significantly improves the magnetic field enclosure effect and uniformity, further reduces magnetic leakage, increases energy conversion efficiency, and enhances the mechanical stability of the structure.

[0053] In some embodiments, the connection terminal is provided with a slot adapted to the shape of the external electrode. This slot adaptation enables a quick and stable electrical connection, reduces contact resistance, improves signal transmission quality, simplifies installation, and enhances the user experience.

[0054] In one implementation, the connecting piece 4 is connected to an insulating support structure, which is adapted to be disposed between the connection of one of the connecting terminals and the connecting piece 4 of the other terminal. The insulating support structure connected to the connecting piece 4 effectively isolates electrical interference between different connecting pieces 4, enhancing the safety and reliability of the equipment, while also providing additional mechanical support and extending its service life.

[0055] This invention's magnetic field closed coil adopts a toroidal inductor structure. Through the axially staggered arrangement of connecting terminals at both ends and the design of three-dimensionally overlapping connecting pieces 4, it achieves efficient closed-loop magnetic field lines and suppression of electromagnetic interference. Its core features are: the toroidal coil forms a natural closed magnetic circuit; the non-overlapping terminal layout eliminates end magnetic leakage; and the three-dimensional cross structure of the bent connecting pieces 4 optimizes space utilization and constructs an electromagnetic shielding layer, ensuring uniform magnetic field distribution while effectively blocking external interference, ultimately achieving low-loss, high-stability energy transmission.

[0056] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A closed magnetic field coil, characterized in that, include: An inductor coil (1) is constructed as a ring. Both the beginning and end of the inductor coil (1) are provided with connection terminals suitable for conducting with an external circuit. The connection terminals include an input terminal (2) and an output terminal (3). The input terminal (2) and the output terminal (3) are spaced apart and are arranged along the axial direction of the inductor coil (1). The projections of the input terminal (2) and the output terminal (3) do not overlap. A connecting piece (4) is connected to at least one of the connecting terminals; Along the axial direction of the inductor coil (1), the connecting piece (4) of one of the connecting terminals overlaps with the projection of the other connecting terminal, and / or the connecting piece (4) of one of the connecting terminals overlaps with the projection of the connecting piece (4) of the other connecting terminal.

2. The magnetic field enclosed coil according to claim 1, characterized in that, The inductor (1) includes at least one sub-coil, which is constructed as a ring. In a plane perpendicular to the axial direction of the sub-coil, the input end (2) and the output end (3) of the sub-coil are in the same plane.

3. The magnetic field enclosed coil according to claim 2, characterized in that, The connecting piece (4) has a bent structure. The connecting piece (4) includes an axial extension (41) and a radial extension (42). The axial extension (41) is adapted to extend along the axial direction of the sub-coil so that the radial extension (42) and another connecting terminal are staggered along the axial direction of the sub-coil.

4. The magnetic field enclosed coil according to claim 3, characterized in that, The extension direction of the axial extension (41) is set at an angle to the tangential direction of the annular structure of the inductor coil (1).

5. The magnetic field enclosed coil according to claim 2, characterized in that, The input terminal (2) and the output terminal (3) are respectively provided with the connecting piece (4); the connecting piece (4) connected to the output terminal (3) and the connecting piece (4) connected to the input terminal (2) are respectively provided on both sides of the inductor coil (1) along the axial direction.

6. The magnetic field enclosed coil according to claim 1, characterized in that, The connecting piece (4) is made of conductive material.

7. The magnetic field enclosed coil according to claim 1, characterized in that, The inductor coil (1) has a ring structure that is continuously wound into an integrated structure. The winding curvature of each turn of the coil is consistent, and they are stacked along the axial direction to form a closed magnetic field confinement space.

8. The magnetic field enclosed coil according to claim 1, characterized in that, The connecting piece (4) is detachably connected to the connecting terminal.

9. The magnetic field enclosed coil according to claim 1, characterized in that, The connection terminal is provided with a slot that is adapted to the shape of the external electrode.

10. The magnetic field enclosed coil according to claim 1, characterized in that, The connecting piece (4) is connected to an insulating support structure, which is adapted to be disposed between the connecting piece (4) of one of the connecting terminals and the connecting piece (4) of the other connecting terminal.

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