An electromagnetic induction structure

Abstract

This utility model discloses an electromagnetic induction structure, belonging to the technical field of magnetic induction elements. It includes: a base, a ring-shaped magnetic core, an adhesive connector, a stacked coil, an upper lead, a lower lead, and insulating sleeves. The ring-shaped magnetic core is disposed on the base, and the ring-shaped magnetic core is connected to the base via the adhesive connector. The stacked coil is disposed on one side of the ring-shaped magnetic core. One end of the upper lead is connected to the upper part of the stacked coil, and the other end of the upper lead is inserted into and connected to the base. One end of the lower lead is connected to the lower part of the stacked coil, and the other end of the lower lead is inserted into and connected to the base. Two insulating sleeves respectively cover and connect to the upper lead and the lower lead. This utility model solves the technical problem of how to improve the performance of inductive elements.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic induction elements, and in particular to an electromagnetic induction structure. Background Technology

[0002] Electromagnetic induction elements are passive electronic components that operate based on the principle of electromagnetic induction. Their core characteristic is that they can induce an electromotive force in themselves or a nearby conductor through a changing current, thereby storing magnetic field energy or transferring electrical energy.

[0003] In the field of electromagnetic induction components, typical products include inductors and transformers. Inductors, such as coils, generate a self-induced electromotive force through changes in current, which opposes the change in current and stores magnetic energy. Transformers, on the other hand, establish a changing magnetic field in the iron core through the alternating current in the primary coil, thereby inducing a mutual inductance voltage in the secondary coil, achieving electromagnetic coupling and transmission of electrical energy. These components are all based on Faraday's law of electromagnetic induction, essentially converting electrical energy into magnetic field energy.

[0004] Based on this, Chinese patent document CN114520091B discloses an inductor comprising: at least one first magnetic core, including a connecting portion, a first column and a second column, wherein the first column and the second column are disposed on the top surface of the connecting portion and a winding groove is included between the first column and the second column; a second magnetic core, disposed adjacent to the first magnetic core; and at least one winding, each winding being composed of a single metal conductive sheet wound at least one turn, and each winding being sleeved on the corresponding first column and partially located in the winding groove of the corresponding first magnetic core, and the thickness of the winding being less than or equal to the width of the winding groove and greater than 0.9 times the width of the winding groove.

[0005] However, existing inductors still suffer from technical problems such as easy magnetic leakage and high eddy current losses. Specifically, in the existing technical solutions, the core causes of increased magnetic leakage and eddy current losses in inductors can be divided into three main directions: magnetic circuit design defects, material performance limitations, and process errors. Among them, the reasons for increased magnetic leakage due to magnetic circuit design defects may be: 1. Insufficient magnetic circuit closure, open magnetic cores, such as rod-shaped magnetic cores or spliced ​​magnetic cores with air gaps, forcing magnetic lines of force to close through the air, resulting in a magnetic leakage rate as high as 15-30%; 2. Improper air gap design, such as edge effect, which causes the magnetic field diffusion at the edge of the air gap, leading to a sharp increase in local magnetic flux density and a magnetic leakage increase of more than 40%; 3. Unbalanced winding arrangement, unreasonable winding size specifications, resulting in asymmetrical magnetomotive force distribution and an increase in leakage inductance of 50-80%. In addition, material properties are the core reason for the increase in eddy current loss, such as excessively low resistivity, such as iron cores; excessive core thickness, when the thickness t > 2 times the skin depth δ, the eddy current cross-sectional area increases; or poor hysteresis characteristics, materials with high coercivity (Hc > 200 A / m) have the characteristic of wide hysteresis loop, which makes their repeated magnetization loss high and induces local eddy currents. Utility Model Content

[0006] Therefore, it is necessary to provide an electromagnetic induction structure to address the technical problem of how to improve the performance of inductive components.

[0007] An electromagnetic induction structure includes: a base, a ring-shaped magnetic core, an adhesive connector, a stacked coil, an upper lead, a lower lead, and an insulating sheath; the ring-shaped magnetic core is disposed on the base, and the ring-shaped magnetic core is connected to the base via the adhesive connector; the stacked coil is disposed on one side of the ring-shaped magnetic core, one end of the upper lead is connected to the upper part of the stacked coil, and the other end of the upper lead is inserted into and connected to the base; one end of the lower lead is connected to the lower part of the stacked coil, and the other end of the lower lead is inserted into and connected to the base; two insulating sheaths respectively cover and connect to the upper lead and the lower lead.

[0008] Furthermore, the base has a support body, a positioning insertion pin, and a lead wire insertion hole.

[0009] Furthermore, a plurality of positioning insertion pins are evenly distributed at the bottom of the support body, and the annular magnetic core is disposed on the support body.

[0010] Furthermore, the two lead wire sockets are disposed opposite to each other in the bearing body, and the upper lead wire or the lower lead wire is respectively inserted into one of the lead wire sockets.

[0011] Furthermore, the annular magnetic core has a core base and a core column.

[0012] Furthermore, the two magnetic core seats are arranged opposite each other, one above the other, and the two magnetic core cylinders are respectively connected to the ends of the two magnetic core seats.

[0013] Furthermore, the two magnetic core pillars and the two magnetic core seats are alternately connected to form a ring structure.

[0014] Furthermore, the stacked coils are arranged around a magnetic core cylinder.

[0015] Furthermore, the winding length of the stacked coil around one of the magnetic core cylinders is denoted as L, and the winding diameter of the stacked coil around the magnetic core cylinder is denoted as D. Then, the physical dimensions of the stacked coil are controlled as follows: 2≤L / D≤5.

[0016] Furthermore, the winding diameter of the stacked coil wound on one of the magnetic core cylinders is denoted as D, and the thickness of the conductor in each layer of the stacked coil is denoted as t. Then the physical dimensions of the stacked coil are controlled as follows: 0.25≤t / D≤1.

[0017] In summary, the electromagnetic induction structure of this utility model comprises a base, a ring-shaped magnetic core, an adhesive connection, a stacked coil, an upper lead, a lower lead, and an insulating sheath. The ring-shaped magnetic core is disposed on the base, and the ring-shaped magnetic core is connected to the base through the adhesive connection. The stacked coil is disposed on one side of the ring-shaped magnetic core. One end of the upper lead is connected to the upper part of the stacked coil, and the other end of the upper lead is inserted into and connected to the base. One end of the lower lead is connected to the lower part of the stacked coil, and the other end of the lower lead is inserted into and connected to the base. The two insulating sheaths respectively cover and connect the upper lead and the lower lead. This invention proposes an electromagnetic induction structure with good structural stability. By enhancing the connection rigidity between the base, the toroidal magnetic core, and the stacked coil, it reduces magnetic leakage and eddy current losses, thereby improving the magnetic induction performance of the inductor. Therefore, this invention solves the technical problem of how to improve the performance of inductors. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an electromagnetic induction structure according to the present invention;

[0019] Figure 2 This is a schematic diagram of the electromagnetic induction structure of this utility model from another direction;

[0020] Figure 3 This is a schematic diagram of the electromagnetic induction structure of this utility model from another direction;

[0021] Figure 4 This is a schematic diagram of the electromagnetic induction structure of this utility model from another direction. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please refer to the following: Figures 1 to 4 This utility model discloses an electromagnetic induction structure comprising: a base 1, a ring-shaped magnetic core 2, an adhesive connection 3, a stacked coil 4, an upper lead wire 5, a lower lead wire 6, and an insulating sheath 7. The ring-shaped magnetic core 2 is disposed on the base 1, and the ring-shaped magnetic core 2 is connected to the base 1 through the adhesive connection 3. The stacked coil 4 is disposed on one side of the ring-shaped magnetic core 2. One end of the upper lead wire 5 is connected to the upper part of the stacked coil 4, and the other end of the upper lead wire 5 is inserted into and connected to the base 1. One end of the lower lead wire 6 is connected to the lower part of the stacked coil 4, and the other end of the lower lead wire 6 is inserted into and connected to the base 1. The two insulating sheaths 7 respectively cover and connect the upper lead wire 5 and the lower lead wire 6.

[0029] Specifically, this utility model proposes an integrated structure for an electromagnetic induction element. It involves setting a base 1 at the bottom of the annular magnetic core 2 and bonding the base 1 to the annular magnetic core 2 via an adhesive connection 3, thereby improving the connection rigidity between the two. The adhesive connection 3 can be composed of epoxy resin, acrylic structural adhesive, or UV curing agent, etc. Furthermore, the stacked coil 4 surrounds a cylindrical structure on one side of the annular magnetic core 2, with the upper lead 5 and lower lead 6 connected to its upper and lower parts respectively. The lower ends of the two leads are then inserted into the base 1, further improving the connection rigidity between the annular magnetic core 2 and the base 1. Additionally, the upper lead 5 and lower lead 6 are covered with an insulating sheath 7. The insulating sheath 7 can be a tubular structure made of materials such as PVC, rubber, or PET heat shrink tubing, which can directly cover the leads, thereby enhancing wear resistance and insulation performance. Therefore, this utility model proposes an electromagnetic induction structure with good structural stability. By enhancing the connection rigidity between the base 1, the annular magnetic core 2, and the stacked coil 4, leakage flux and eddy current loss are reduced, thereby improving the magnetic induction performance of the inductor.

[0030] Furthermore, the base 1 has a support body 101, positioning insertion pins 102, and lead wire insertion holes 103; a plurality of positioning insertion pins 102 are evenly distributed on the bottom of the support body 101, and the annular magnetic core 2 is disposed on the support body 101; two lead wire insertion holes 103 are disposed opposite to each other in the support body 101, and the upper lead wire 5 or the lower lead wire 6 is correspondingly inserted into one of the lead wire insertion holes 103.

[0031] Furthermore, the annular magnetic core 2 has a core base 201 and a core column 202; the two core bases 201 are arranged opposite each other, and the two core columns 202 are respectively connected to the ends of the two core bases 201, and the two core columns 202 and the two core bases 201 are alternately connected to form an annular structure; the stacked coil 4 is arranged around one of the core columns 202.

[0032] Furthermore, the stacked coil 4 can be made by winding flat wires, the core of which can be copper or copper alloy; its outer sheath is uniformly coated with insulating varnish.

[0033] More specifically, such as Figure 1 and Figure 2As shown, the winding length of the stacked coil 4 around one of the magnetic core cylinders 202 is L, in mm; the diameter of the stacked coil 4 wound around the magnetic core cylinder 202 is D, in mm; the thickness of the conductor in each layer of the stacked coil 4 is t, in mm. Therefore, when 2 ≤ L / D ≤ ​​5 and 0.25 ≤ t / D ≤ 1, the electromagnetic induction structure of this invention exhibits optimal performance. More specifically, when the winding shape of the stacked coil 4 is elliptical, the value of D is the dimension of the major axis of the ellipse. The aforementioned values ​​of L, D, and t all include the thickness of the insulating varnish on the conductor surface.

[0034] This is because adjusting the physical size ratio of the laminated cell coil 4 can make the magnetic field distribution more uniform, reduce leakage flux and eddy current losses, and balance inductance and high-frequency performance. Specifically, when the L / D ratio is too small, for example, when L / D < 2, it will cause distortion of the end magnetic field of the laminated cell coil 4; while when the L / D ratio is too large, i.e., when L / D > 5, it will cause an increase in the axial magnetic field gradient of the laminated cell coil 4, thereby exacerbating the interlayer leakage flux phenomenon.

[0035] Therefore, by controlling the layer thickness, the proportion of skin depth of high-frequency current can be reduced, the reasonable interlayer spacing can weaken the magnetic field interference between adjacent conductors, and the uniform interlayer magnetic field distribution can also reduce the risk of local saturation of the magnetic core.

[0036] In one specific embodiment, if the stacked coil 4 has a t / D ratio of 0.3 (e.g., a diameter of 10 mm and a layer thickness of 3 mm), and is designed with an L / D ratio of 3, the Q value of the electromagnetic induction structure in the operating frequency band, such as 1–10 MHz, can be increased by 15–20%. The essence of this optimized structure is the coordinated matching of electromagnetic field boundary conditions and conductor spatial topology.

[0037] In summary, the electromagnetic induction structure of this utility model comprises a base 1, a ring-shaped magnetic core 2, an adhesive connection part 3, a stacked coil 4, an upper lead wire 5, a lower lead wire 6, and an insulating sleeve 7. The ring-shaped magnetic core 2 is disposed on the base 1, and the ring-shaped magnetic core 2 is connected to the base 1 through the adhesive connection part 3. The stacked coil 4 is disposed on one side of the ring-shaped magnetic core 2. One end of the upper lead wire 5 is connected to the upper part of the stacked coil 4, and the other end of the upper lead wire 5 is inserted into and connected to the base 1. One end of the lower lead wire 6 is connected to the lower part of the stacked coil 4, and the other end of the lower lead wire 6 is inserted into and connected to the base 1. The two insulating sleeves 7 respectively cover and connect the upper lead wire 5 and the lower lead wire 6. This invention proposes an electromagnetic induction structure with good structural stability. By enhancing the connection rigidity between the base 1, the annular magnetic core 2, and the stacked coil 4, leakage flux and eddy current losses are reduced, thereby improving the magnetic induction performance of the inductor. Therefore, this invention solves the technical problem of how to improve the performance of inductors.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electromagnetic induction structure, characterized in that, It includes: The system comprises a base (1), a ring core (2), an adhesive connector (3), a stacked coil (4), an upper lead wire (5), a lower lead wire (6), and an insulating sheath (7). The ring core (2) is mounted on the base (1), and the ring core (2) is connected to the base (1) via the adhesive connector (3). The stacked coil (4) is mounted on one side of the ring core (2). One end of the upper lead wire (5) is connected to the upper part of the stacked coil (4), and the other end of the upper lead wire (5) is inserted into and connected to the base (1). One end of the lower lead wire (6) is connected to the lower part of the stacked coil (4), and the other end of the lower lead wire (6) is inserted into and connected to the base (1). The two insulating sheaths (7) respectively cover and connect the upper lead wire (5) and the lower lead wire (6).

2. The electromagnetic induction structure according to claim 1, characterized in that: The base (1) has a support body (101), a positioning insertion pin (102), and a lead wire insertion hole (103).

3. The electromagnetic induction structure according to claim 2, characterized in that: The bottom of the support body (101) is provided with a plurality of positioning insertion pins (102) evenly distributed, and the annular magnetic core (2) is disposed on the support body (101).

4. The electromagnetic induction structure according to claim 3, characterized in that: The two lead-in sockets (103) are disposed opposite to each other in the bearing base (101), and the upper lead-out wire (5) or the lower lead-out wire (6) is respectively inserted into one of the lead-in sockets (103).

5. The electromagnetic induction structure according to claim 4, characterized in that: The annular magnetic core (2) has a core base (201) and a core column (202).

6. The electromagnetic induction structure according to claim 5, characterized in that: The two magnetic core holders (201) are arranged opposite each other, one above the other, and the two magnetic core cylinders (202) are respectively connected to the ends of the two magnetic core holders (201).

7. An electromagnetic induction structure according to claim 6, characterized in that: The two magnetic core pillars (202) and the two magnetic core seats (201) are alternately connected to form a ring structure.

8. The electromagnetic induction structure according to claim 7, characterized in that: The stacked coil (4) is arranged around a magnetic core cylinder (202).

9. An electromagnetic induction structure according to claim 8, characterized in that: The winding length of the stacked coil (4) around one of the magnetic core cylinders (202) is denoted as L, and the winding diameter of the stacked coil (4) around the magnetic core cylinder (202) is denoted as D. The physical dimensions of the stacked coil (4) are controlled as follows: 2≤L / D≤5.

10. An electromagnetic induction structure according to claim 9, characterized in that: The winding diameter of the stacked coil (4) wound on one of the magnetic core cylinders (202) is denoted as D, and the thickness of the conductor of each layer in the stacked coil (4) is denoted as t. The physical dimensions of the stacked coil (4) are controlled as follows: 0.25≤t / D≤1.

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