Inductors

Abstract

The present application relates to an inductor. The inductor described in the present application includes a first magnetic core, a second magnetic core, a first winding and a second winding. The first magnetic core includes a substrate and a middle column, and the middle column is vertically arranged on the substrate. The second magnetic core is arranged opposite to the first magnetic core, and the middle column is located between the first magnetic core and the second magnetic core. The first winding is wound on the middle column, the wire used in the first winding is a flat wire, and the first winding is wound in a flat winding manner. The second winding and the first winding are wound on the middle column, the wire used in the second winding is a flat wire, and the second winding is wound in a vertical winding manner. The inductor described in the present application has the advantages of good size optimization and high production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of electronic components, and in particular to an inductor. Background Art

[0002] Inductors are magnetic components that can convert electrical energy into magnetic energy and store it. Currently, the performance requirements for inductors are getting higher and higher. For a single magnetic component, two windings can be set in the magnetic core to share the same magnetic circuit to achieve miniaturization, thereby reducing the number of magnetic components.

[0003] The layout of winding inside another winding is more complicated during assembly. Therefore, one way is to arrange two sets of flat coils in parallel in the magnetic core, but the disadvantage is that the lateral size of the inductor is increased. In order to achieve the same purpose and meet the demand for miniaturization, it is necessary to improve the existing structure. Summary of the invention

[0004] Based on this, it is necessary to provide an inductor to address the problems of poor size optimization and low production efficiency of variable inductors.

[0005] An inductor comprising:

[0006] A first magnetic core, the first magnetic core comprising a substrate and a middle column, wherein the middle column is vertically arranged on the substrate;

[0007] a second magnetic core, wherein the second magnetic core is arranged opposite to the first magnetic core, and the middle column is located between the first magnetic core and the second magnetic core;

[0008] A first winding, wherein the first winding is wound around the center column, the wire material used in the first winding is a flat wire, and the first winding is wound in a flat winding manner; and

[0009] The second winding is wound on the center column together with the first winding. The wire material used in the second winding is a flat wire. The second winding is wound in a vertical winding manner.

[0010] In one embodiment, the first winding includes two first pin portions, and the two first pin portions are respectively and vertically connected to the two ends of the first winding, and the extension direction of the first pin portion is set in the radial direction of the center column, and the lower end surface of the first pin portion is set parallel to the lower end surface of the first magnetic core, and the first pin portion is used to connect to an external circuit.

[0011] In one embodiment, the second winding includes two second pin portions, which are respectively connected to two ends of the second winding in a one-to-one correspondence and are arranged toward the axial direction of the center column, and the second pin portions are used to connect to an external circuit.

[0012] In one embodiment, the second winding further includes a first extension portion and a second extension portion, one end of the first extension portion is connected to one end portion of the second winding, and the other end of the first extension portion is vertically connected to one of the second pin portions; one end of the second extension portion is connected to the other end portion of the second winding, and the other end of the second extension portion is vertically connected to another of the second pin portions; the extension direction of the first extension portion and the second extension portion is inclined from the two ends of the second winding toward the center column.

[0013] In one embodiment, the two second pin portions are arranged parallel to the lower end surface of the middle column, and the two second pin portions abut against the lower end surface of the middle column.

[0014] In one embodiment, an air gap is provided between the first winding and the second winding, the number of turns of the first winding and the second winding does not exceed one turn, and the second winding is provided between the first winding and the second magnetic core.

[0015] In one embodiment, the first magnetic core and the second magnetic core are a combination of EI type, EE type or EP type, or the first magnetic core and the second magnetic core are an integral structure.

[0016] In one embodiment, the first winding and the second winding are connected by an adhesive.

[0017] In one embodiment, the first magnetic core further includes a first side column and a second side column, the first side column and the second side column are respectively arranged on both sides of the substrate, the middle column is arranged between the first side column and the second side column, a first groove is provided between the first side column, the middle column and the second side column, and the first winding is arranged in the first groove.

[0018] In one embodiment, the first side column is provided with a first angle groove at one end close to the first pin portion, and the second side column is provided with a second angle groove at one end close to the first pin portion, and the two first pin portions extend toward the radial direction of the middle column along the first angle groove and the second angle groove respectively.

[0019] The above-mentioned inductor, by arranging the first winding and the second winding side by side between the first magnetic core and the second magnetic core, the first winding and the second winding are both wound with flat wires, thereby reducing the volume of the first winding and the second winding, avoiding the first winding and the second winding from overlapping to affect the performance of the inductor, and meeting the withstand voltage requirements. The first winding and the second winding are arranged side by side relatively to avoid increasing the lateral size of the inductor, and the second winding is wound vertically to reduce the thickness of the second winding, thereby optimizing the size of the inductor, and it is easier to assemble during the production process, and has the advantages of good size optimization and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the inductor described in the embodiment of the present application.

[0021] Figure 2 This is a front view of the inductor according to the embodiment of the present application without the second magnetic core.

[0022] Figure 3 This is a bottom view of the inductor described in an embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of an exploded view of an inductor described in an embodiment of the present application.

[0024] Reference numerals: 100, first magnetic core; 100A, first groove; 110, substrate; 120, center column; 120A, second groove; 130, first side column; 130A, first corner groove; 140, second side column; 140A, second corner groove;

[0025] 200, a second magnetic core;

[0026] 300, a first winding; 310, a first pin portion;

[0027] 400, second winding; 410, second pin portion; 420, first extension portion; 430, second extension portion. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 the present application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] See also Figure 1 and Figure 4 , Figure 1 and Figure 4 The schematic diagram of the structure of an inductor in an embodiment of the present application is shown. The inductor provided in an embodiment of the present application includes a first magnetic core 100, a second magnetic core 200, a first winding 300 and a second winding 400. The first magnetic core 100 includes a substrate 110 and a middle column 120, and the middle column 120 is vertically arranged on the substrate 110. The second magnetic core 200 is arranged opposite to the first magnetic core 100, and the middle column 120 is located between the first magnetic core 100 and the second magnetic core 200. The first winding 300 is wound on the middle column 120, and the wire used in the first winding 300 is a flat wire, and the first winding 300 is wound in a flat winding manner. The second winding 400 and the first winding 300 are wound on the middle column 120, and the wire used in the second winding 400 is a flat wire, and the second winding 400 is wound in a vertical winding manner. Specifically, vertical winding means that the winding direction is perpendicular to the width plane of the wire, and flat winding means that the winding direction is parallel to the width plane of the wire.

[0035] The inductor described in the embodiment of the present application is assembled into an inductor by arranging the first winding 300 and the second winding 400 side by side between the first magnetic core 100 and the second magnetic core 200. The first winding 300 and the second winding 400 are both wound with flat wires, thereby reducing the volume of the first winding 300 and the second winding 400, avoiding the overlap between the first winding 300 and the second winding 400 to affect the performance of the inductor, and meeting the withstand voltage requirements. The first winding 300 and the second winding 400 are arranged side by side to avoid increasing the lateral size of the inductor, and the second winding 400 is wound vertically to reduce the thickness of the second winding 400, thereby optimizing the size of the inductor, and it is easier to assemble during the production process, with the advantages of good size optimization and high production efficiency.

[0036] Combination Figure 2 As shown, Figure 2The front view of the inductor without the second magnetic core in one embodiment of the present application is shown. In some embodiments, the first winding 300 includes two first pin portions 310, and the two first pin portions 310 are respectively and vertically connected to the two ends of the first winding 300 in a one-to-one correspondence. The extension direction of the first pin portion 310 is set in the radial direction of the middle column 120, and the lower end surface of the first pin portion 310 is set parallel to the lower end surface of the first magnetic core 100. The first pin portion 310 is used to connect to an external circuit. By respectively arranging the first pin portions 310 at the two ends of the first winding 300, the lower end surface of the first pin portion 310 is parallel to the bottom surface of the inductor, so that the first pin portion 310 can form a good contact with the circuit board. Moreover, the extension directions of the two adjacent first pin portions 310 are opposite and away from each other, that is, they extend outward. Through such a design, electrical connection between the two first pin portions 310 can be avoided, thereby avoiding circuit problems and improving the stability of use.

[0037] In an optional embodiment, if Figure 3 and Figure 4 As shown, the second winding 400 includes two second pin portions 410, and the two second pin portions 410 are connected to the two ends of the second winding 400 in a one-to-one correspondence. The second pin portions 410 are arranged toward the axial direction of the center column 120, and the second pin portions 410 are used to connect to an external circuit. By arranging the second pin portions 410 at the two ends of the second winding 400, the second winding 400 can be electrically connected to the external circuit through the second pin portions 410, and the second pin portions 410 can ensure the connection reliability between the second winding 400 and the external circuit, thereby improving the stability in use.

[0038] In an optional embodiment, if Figures 2 to 4As shown, the second winding 400 also includes a first extension portion 420 and a second extension portion 430, one end of the first extension portion 420 is connected to one end portion of the second winding 400, and the other end of the first extension portion 420 is vertically connected to a second pin portion 410; one end of the second extension portion 430 is connected to the other end portion of the second winding 400, and the other end of the second extension portion 430 is vertically connected to another second pin portion 410; the extension direction of the first extension portion 420 and the second extension portion 430 is inclined from the two ends of the second winding 400 toward the center column 120. By respectively arranging the first extension portion 420 and the second extension portion 430 between the two second pin portions 410 and the two ends of the second winding 400, and the extension direction of the first extension portion 420 and the second extension portion 430 extends inward, that is, away from the first pin portions 310 on both sides, therefore, the position of the second pin portion 410 connected to the first extension portion 420 and the second extension portion 430 is also away from the first pin portion 310, which can avoid the second pin portion 410 and the first pin portion 310 from being short-circuited, thereby ensuring the stability of the inductor while optimizing the size.

[0039] In an optional embodiment, if Figure 4 As shown, the middle column 120 is provided with a second groove 120A at positions corresponding to the first extension portion 420 and the second extension portion 430 , so that the first extension portion 420 and the second extension portion 430 are placed in the second groove 120A, further optimizing the internal space of the inductor.

[0040] In an optional embodiment, if Figure 4 As shown, the two second pin portions 410 are arranged parallel to the lower end surface of the center column 120, and the two second pin portions 410 abut against the lower end surface of the center column 120. The second pin portion 410 is a thin metal sheet, and in order to make the second pin portion 410 and the first pin portion 310 located on the same straight line, the second pin portion 410 is bent and arranged on the lower end surface of the center column 120, which meets the design requirements of the inductor.

[0041] In an optional embodiment, an air gap is provided between the first winding 300 and the second winding 400, and the number of turns of the first winding 300 and the second winding 400 does not exceed one turn, and the second winding 400 is provided between the first winding 300 and the second magnetic core 200. By arranging the first winding 300 and the second winding 400 in parallel with each other and limiting the number of turns, an air gap is provided between the two, and an overlapping portion is avoided, thereby meeting the withstand voltage requirements of the inductor design.

[0042] In an optional embodiment, the first magnetic core 100 and the second magnetic core 200 are a combination of EI type, EE type or EP type. Alternatively, the first magnetic core 100 and the second magnetic core 200 are an integrated structure. The structure of the first magnetic core 100 and the second magnetic core 200 can be selected as EI type, EE type or EP type according to the needs. The first winding 300 and the second winding 400 in these structures can use a parallel structure to reduce the lateral size of the inductor, which has the advantage of wide applicability.

[0043] In an optional embodiment, if Figure 3 As shown, the first winding 300 and the second winding 400 are connected by an adhesive. The first winding 300 and the second winding 400 are assembled by pasting with the adhesive, and the two can be easily connected during installation, and a gap can be left between the two, which has the advantage of convenient installation.

[0044] In an optional embodiment, if Figure 2 and Figure 4 As shown, the first magnetic core 100 and the second magnetic core 200 are of EI type structure, therefore, the first magnetic core 100 also includes a first side column 130 and a second side column 140, the first side column 130 and the second side column 140 are respectively arranged on both sides of the substrate 110, the middle column 120 is arranged between the first side column 130 and the second side column 140, a first groove 100A is provided between the first side column 130, the middle column 120 and the second side column 140, and the first winding 300 is arranged in the first groove 100A. Since the first magnetic core 100 and the second magnetic core 200 of the present embodiment are of EI type structure, the first magnetic core 100 also includes a first side column 130 and a second side column 140 on both sides in addition to the substrate 110. The first winding 300 and the second winding 400 are arranged in the first groove 100A formed by the first magnetic core 100. The second magnetic core 200 is a flat plate covering the first magnetic core 100. This structure has good magnetic circuit continuity, low magnetic loss, high magnetic flux density, small magnetic leakage and good heat dissipation performance.

[0045] In an optional embodiment, if Figure 2 and Figure 4 As shown, the first side column 130 is provided with a first angle groove 130A at one end close to the first pin portion 310, and the second side column 140 is provided with a second angle groove 140A at one end close to the first pin portion 310, and the two first pin portions 310 extend along the first angle groove 130A and the second angle groove 140A toward the radial direction of the middle column 120 respectively. Since the first pin portion 310 extends toward the radial direction of the middle column 120, the first angle groove 130A and the second angle groove 140A are provided on both sides of the bottom of the first magnetic core 100, so that the first pin portion 310 obtains extension space from the first angle groove 130A and the second angle groove 140A, thereby optimizing the internal space of the inductor and making the size of the inductor smaller.

[0046] The inductor described in the embodiment of the present application has the following beneficial effects:

[0047] 1. The first winding 300 and the second winding 400 are arranged side by side relative to each other, so as to avoid increasing the lateral size of the inductor. Moreover, the second winding 400 is wound vertically, so as to reduce the thickness of the second winding 400, thereby optimizing the size of the inductor. The inductor is easier to assemble during the production process, and has the advantages of good size optimization and high production efficiency.

[0048] 2. By extending the extension direction of the first extension portion 420 and the second extension portion 430 inward, the position of the second pin portion 410 connected to the first extension portion 420 and the second extension portion 430 is moved away from the first pin portion 310, thereby avoiding a short circuit between the second pin portion 410 and the first pin portion 310, thereby ensuring the stability of the inductor while optimizing the size.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An inductor, characterized in that: include: A first magnetic core (100), the first magnetic core (100) comprising a substrate (110) and a center column (120), the center column (120) being arranged vertically on the substrate (110); a second magnetic core (200), the second magnetic core (200) being arranged opposite to the first magnetic core (100), and the middle column (120) being located between the first magnetic core (100) and the second magnetic core (200); a first winding (300), the first winding (300) being wound around the center column (120), the wire material used in the first winding (300) being a flat wire, and the first winding (300) being wound in a flat winding manner; and A second winding (400), wherein the second winding (400) and the first winding (300) are wound on the center column (120), the wire material used in the second winding (400) is a flat wire, and the second winding (400) is wound in a vertical winding manner.

2. The inductor according to claim 1, characterized in that: The first winding (300) comprises two first pin portions (310), the two first pin portions (310) being respectively and vertically connected to two ends of the first winding (300) in a one-to-one correspondence, the first pin portions (310) extending in a direction toward the radial direction of the center column (120), and the lower end surface of the first pin portion (310) being arranged parallel to the lower end surface of the first magnetic core (100), and the first pin portion (310) being used to connect to an external circuit.

3. The inductor according to claim 1, wherein: The second winding (400) comprises two second pin portions (410), the two second pin portions (410) being respectively connected to two ends of the second winding (400) in a one-to-one correspondence and arranged in an axial direction of the center column (120), the second pin portions (410) being used to connect to an external circuit.

4. The inductor according to claim 3, characterized in that: The second winding (400) further comprises a first extension portion (420) and a second extension portion (430); one end of the first extension portion (420) is connected to one end of the second winding (400), and the other end of the first extension portion (420) is vertically connected to one of the second pin portions (410); one end of the second extension portion (430) is connected to the other end of the second winding (400), and the other end of the second extension portion (430) is vertically connected to another of the second pin portions (410); and the extension directions of the first extension portion (420) and the second extension portion (430) are inclined from the two ends of the second winding (400) toward the center column (120).

5. The inductor according to claim 4, characterized in that: The two second pin portions (410) are arranged parallel to the lower end surface of the middle column (120), and the two second pin portions (410) abut against the lower end surface of the middle column (120).

6. The inductor according to claim 1, characterized in that: An air gap is provided between the first winding (300) and the second winding (400), the number of turns of the first winding (300) and the second winding (400) does not exceed one turn, and the second winding (400) is provided between the first winding (300) and the second magnetic core (200).

7. The inductor according to claim 1, characterized in that: The first magnetic core (100) and the second magnetic core (200) are a combination of EI type, EE type or EP type, or the first magnetic core (100) and the second magnetic core (200) are an integrated structure.

8. The inductor according to claim 1, characterized in that: The first winding (300) and the second winding (400) are connected via an adhesive.

9. The inductor according to claim 2, characterized in that: The first magnetic core (100) further comprises a first side column (130) and a second side column (140), wherein the first side column (130) and the second side column (140) are respectively arranged on both sides of the substrate (110), the middle column (120) is arranged between the first side column (130) and the second side column (140), a first groove (100A) is arranged between the first side column (130), the middle column (120) and the second side column (140), and the first winding (300) is arranged in the first groove (100A).

10. The inductor according to claim 9, characterized in that: The first side column (130) is provided with a first angle groove (130A) at one end close to the first pin portion (310), and the second side column (140) is provided with a second angle groove (140A) at one end close to the first pin portion (310), and the two first pin portions (310) extend along the first angle groove (130A) and the second angle groove (140A) respectively toward the radial direction of the center column (120).

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