Common mode inductor

Abstract

The utility model relates to the technical field of inductors, in particular to a common-mode inductor, which comprises a base, a magnetic core and coils, the coils comprise a first coil and a second coil, the first coil is connected with the second coil, the magnetic core is a square-shaped magnetic core which can be symmetrically split up and down, the coils are runway-shaped coils, winding posts are arranged on two sides of the magnetic core, and the winding posts are connected with the base. The shape of the winding part is matched with the shape of the inner diameter of the coil, the magnetic core can be prevented from being abraded and extruding the inner side of the coil, the top and the bottom of the magnetic core are square and used for more stably installing the magnetic core, and the magnetic core is installed on the base. The inductor disclosed by the utility model is simple in overall structure, suitable for mechanical automatic assembling and processing, fewer in structural parts and rapid to assemble, and meets the design requirements of flattening and miniaturization of the inductor.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, and particularly to a common-mode inductor. Background Art

[0002] For common-mode inductors, most of them are still mainly toroidal common-mode inductors. The main reasons are twofold: (1) Toroidal cores are relatively inexpensive. When making a common-mode inductor, only one magnetic ring is needed, while other shapes require pairing to form a common-mode inductor; (2) Since the two windings are wound on a single closed magnetic ring, the effective magnetic permeability is relatively higher than that of other shaped cores. Because of this, the cost of winding toroidal common-mode inductors is relatively high and the process is relatively complex. Most toroidal common-mode inductors are still mainly processed manually, resulting in low production efficiency.

[0003] Therefore, it is necessary to design a common-mode inductor that is more convenient for mechanical processing. Summary of the Utility Model

[0004] In order to solve the above problems, the common-mode inductor provided by the utility model has a simple structure, low cost, low processing difficulty, is suitable for mechanical automated production, and its structure can be suitable for miniaturized design.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A common-mode inductor includes a base, a magnetic core and a coil. The coil includes a first coil and a second coil, and the first coil is connected to the second coil. The magnetic core is a U-shaped structure magnetic core that can be symmetrically split up and down. The coil is a racetrack-shaped coil. The two sides of the magnetic core are winding posts, and the shape of the winding posts matches the inner diameter shape of the coil. The top and bottom of the magnetic core are square for more stable installation of the magnetic core. The magnetic core is installed on the base.

[0007] Optionally, in an embodiment of the utility model, extension parts are arranged to extend outwards at the four corner positions of the base. Positioning pins are provided at the bottoms of the extension parts, and the bottom surfaces of the extension parts are on the same plane as other parts of the bottom surface of the base.

[0008] Optionally, in an embodiment of the utility model, criss-cross reinforcing ribs are provided on the bottom surface of the base, and the longitudinal reinforcing ribs have the same width as the transverse reinforcing ribs.

[0009] Optionally, in an embodiment of the utility model, an upper insulating sheet and a lower insulating sheet are respectively provided at the top and bottom of the coil. The size of the upper insulating sheet is larger than the planar size of the coil, and the size of the lower insulating sheet is smaller than the planar size of the coil.

[0010] Optionally, in an embodiment of the present utility model, the two extension parts are pin parts of an inductor, and mounting holes are formed in the pin parts for mounting the inductor pins.

[0011] Optionally, in an embodiment of the present utility model, the parts of the inductor other than the cross beam of the magnetic core are all rounded corner structures.

[0012] Optionally, in an embodiment of the present utility model, the coil is a flat wire wound coil.

[0013] Advantages of the present utility model

[0014] For the common mode inductor of the present utility model, the overall structure is simple and consists of several main components. In production, several components can be produced separately by equipment and then assembled. The coil is a flat wire wound coil. In the case of the same space, more turns of the coil can be made, meeting the miniaturized design of the inductor and making the inductor flatter. Description of the drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0016] Figure 1 Schematic diagram of the overall structure of the inductor in Embodiment 1 of the present utility model Figure 1 ;

[0017] Figure 2 Schematic diagram of the overall structure of the inductor in Embodiment 1 of the present utility model Figure 2 ;

[0018] Reference numerals: base 1, extension part 101, positioning pin 102, magnetic core 2, first coil 4, second coil 5, upper insulating sheet 6, lead wire 7, lower insulating sheet 8. Detailed implementation manners

[0019] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will give a detailed description of the specific implementation manners of the present utility model with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0022] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0024] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate 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 intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0025] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific implementation manner, structure, features and effects of the present utility model as follows. Embodiment 1

[0026] In order to meet the design requirements of mechanical automation production and simple and easy processing of the structure, a common mode inductor is designed, and the specific scheme is as follows:

[0027] As Figure 1-2 shown, a common mode inductor includes a base 1, a magnetic core 2 and a coil. The coil includes a first coil 4 and a second coil 5. The first coil 4 is connected to the second coil 5. The magnetic core 2 is a U-shaped magnetic core that can be symmetrically split up and down. The coil is a racetrack-shaped coil. The two sides of the magnetic core 2 are winding posts, and the shape of the winding posts matches the inner diameter shape of the coil. The top and bottom of the magnetic core 2 are square for more stable installation of the magnetic core 2. The magnetic core 2 is installed on the base 1.

[0028] At the splicing part of the upper half and the lower half of the magnetic core 2, glue is applied to increase the splicing stability.

[0029] The four corner positions of the base 1 extend outward to form extension parts 101. Positioning pins 102 are provided at the bottoms of the extension parts 101. The bottom surface of the extension parts 101 is in the same plane as the other parts of the bottom surface of the base 1.

[0030] The bottom surface of the base 1 is provided with criss-cross reinforcing ribs, and the longitudinal reinforcing ribs and the transverse reinforcing ribs have the same width.

[0031] An embedding groove is formed at the top of the base 1. When installing the magnetic core 2, glue is added to the embedding groove, and then the magnetic core 2 is embedded and installed.

[0032] Upper insulating sheets 6 and lower insulating sheets 8 are respectively provided at the top and bottom of the coil. The size of the upper insulating sheet 6 is larger than the planar size of the coil, and the size of the lower insulating sheet 8 is smaller than the planar size of the coil.

[0033] Among them, the two extension parts 101 are the pin parts of the inductor, and mounting holes are formed on the pin parts for the installation of inductor pins.

[0034] Among the two extension parts 101 of the pin part, the area is larger than that of the other two extension parts 101 to meet the pin installation requirements.

[0035] When installing the inductor, glue can be added to the bottom of the base 1 to ensure the stable installation of the inductor.

[0036] The inductor has a rounded corner structure at all parts outside the crossbeam of the magnetic core 2.

[0037] Specifically, the shape of the winding post of the magnetic core 2 is smooth, which can prevent the magnetic core 2 from wearing the coil. The rounded corner structure at other parts can make the components more beautiful during processing, reduce sharp parts, and is more conducive to processing.

[0038] The coil is a flat wire wound coil. In this embodiment, the coil is a racetrack-shaped coil wound with flat copper wire. The lead 7 of the coil is led out from the bottom of the coil and bent and fixed on the pin part.

[0039] The common mode inductor of this solution has a simple structure and is convenient for processing. The magnetic core 2 is a splitable mouth-shaped magnetic core 2 that is suitable for mechanical processing and can perform automatic winding. The coil is wound with flat copper wire, which can wind more turns of the coil to improve the inductor performance. And the structural design meets the design requirements of miniaturization, and the overall inductor can be more flattened. Embodiment 2

[0040] In this embodiment, the structure of the inductor is basically the same as that of Embodiment 1, except that an arc-shaped groove for heat dissipation is provided on the side wall of the magnetic core 2 to facilitate the heat dissipation from the inside of the coil. Embodiment 3

[0041] In this embodiment, the structure of the inductor is basically the same as that of Embodiment 1, except that the top and bottom of the magnetic core 2 are flush with the edge of the coil, making the overall structure flat and more beautiful. The edges of the base 1 all extend outwards to form a square flange, so that the base 1 has a larger bottom surface and is more stable to install.

[0042] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and is a simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the protection scope of the present invention.

[0043] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to form equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A common mode inductor, comprising a base, a magnetic core and a coil, characterized in that, The coil includes a first coil and a second coil, the first coil is connected to the second coil, the magnetic core is a U-shaped structure that can be symmetrically split up and down, the coil is a racetrack-shaped coil, both sides of the magnetic core are winding posts, the shape of the winding posts matches the inner diameter shape of the coil, the top and bottom of the magnetic core are square, which is used to install the magnetic core more stably, and the magnetic core is installed on the base.

2. The common mode inductor according to claim 1, characterized in that, Extension parts are provided at the four corner positions of the base and extend outwards, and positioning pins are provided at the bottoms of the extension parts, and the bottom surface of the extension parts is on the same plane as other parts of the bottom surface of the base.

3. A common-mode inductor according to claim 1, wherein, Reinforcing ribs are provided on the bottom surface of the base in a crisscross pattern, and the longitudinal reinforcing ribs have the same width as the transverse reinforcing ribs.

4. A common mode inductor according to claim 1, characterized in that, An upper insulating sheet and a lower insulating sheet are respectively provided at the top and bottom of the coil, the size of the upper insulating sheet is larger than the planar size of the coil, and the lower insulating sheet is smaller than the planar size of the coil.

5. A common mode inductor according to claim 2, characterized in that, The two extension parts are the pin parts of the inductor, and mounting holes are provided on the pin parts for the installation of the inductor pins.

6. The common-mode inductor according to claim 1, characterized in that, The inductor has a rounded corner structure at all parts outside the cross beam of the magnetic core.

7. The common mode inductor according to claim 1, wherein, The coil is a flat wire-wound coil.

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