Common mode inductor
By designing wire-passing steps and wire-binding grooves in the common-mode inductor, the winding process is simplified, solving the problem of complex winding in existing technologies and improving production efficiency and safety.
Patent Information
- Application Number
- CN202423102720.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing common mode inductor winding processes are complex, requiring wire-blocking mechanisms and fixing devices, resulting in low production efficiency.
A wire-passing step was designed on the terminal plate, and a wire-binding groove was designed on the first functional foot of the metal terminal. The height of the wire-binding groove is greater than the bottom height of the wire-passing step. The wire passes through the wire-passing step and is wound around the wire-binding groove, simplifying the winding process.
It reduces the complexity of the winding process, improves wiring efficiency, simplifies the production process, reduces material usage costs, and enhances the safety and reliability of common mode inductors.
Smart Images
Figure CN223526993U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the present application relates to the technical field of inductance, in particular to a common mode inductor. BACKGROUND
[0002] As an important electromagnetic interference suppression element, the common mode inductor is widely used in the power filter circuit of electronic equipment. Its main function is to improve the anti-interference ability of the circuit by low impedance transmission of differential mode signals and high impedance suppression of common mode signals. However, with the increasing performance requirements of electronic equipment, the existing common mode inductor still has many deficiencies in winding process, structure design and production efficiency, etc.
[0003] For example, the current winding process needs to lead the wire out at a right angle or an oblique angle through the terminal in the actual winding process, and cutting is performed at the tail wire. However, this winding process usually needs to rely on a wire blocking mechanism and a fixing device to ensure that the guide needle can complete accurate winding, and the winding process is complex, resulting in low production efficiency. UTILITY MODEL CONTENT
[0004] The embodiment of the present application provides a common mode inductor which can reduce the complexity of the winding process.
[0005] The embodiment of the present application provides a common mode inductor, which comprises:
[0006] A magnetic core, the magnetic core comprises a middle column and end pole plates connected to both ends of the middle column, and two wire passing steps are arranged on one side of the end pole plate in a relative manner;
[0007] A metal terminal is arranged on the side of the end pole plate away from the middle column, and two metal terminals are arranged in a relative manner on the same side, the metal terminal comprises a terminal main body and a first functional leg arranged side by side and partially connected, a wire binding groove is arranged on the first functional leg, and the height of the wire binding groove is greater than the height of the bottom surface of the wire passing step.
[0008] A coil is arranged on the middle column according to a preset rule, and the end part of the wire is wound on the wire binding groove through the wire passing step.
[0009] In the common mode inductor provided by the embodiment of the present application, the back surface of the wire binding groove is bent towards the side away from the terminal main body.
[0010] In the common mode inductor provided by the embodiment of the present application, a heat insulation groove is arranged on the side of the first functional leg away from the wire binding groove.
[0011] In the common mode inductor provided by the embodiment of the present application, the distance between the first functional leg and the terminal main body is greater than the diameter of the winding guide needle.
[0012] In the common mode inductance provided by the embodiment of the present application, the boss structure is arranged between the two metal terminals on the same side, and the boss structure is integrally formed with the end plate.
[0013] In the common mode inductance provided by the embodiment of the present application, the metal terminal further comprises a second functional leg connected to the terminal body and extending towards the middle column direction, and the second functional leg is clamped on the part of the end plate between the two wire passing steps.
[0014] In the common mode inductance provided by the embodiment of the present application, the included angle between the bottom surface of the wire passing step and the side surface of the wire passing step is greater than 90°.
[0015] In the common mode inductance provided by the embodiment of the present application, the metal terminal and the end plate have an adhesive layer therebetween.
[0016] In the common mode inductance provided by the embodiment of the present application, one side of the metal terminal away from the end plate has an electroplating layer.
[0017] In the common mode inductance provided by the embodiment of the present application, the connection part of the wire and the wire binding groove is provided with a welding structure.
[0018] In summary, the common mode inductance provided by the embodiment of the present application comprises a magnetic core, a metal terminal and a coil, wherein the magnetic core comprises a middle column and an end plate connected to both ends of the middle column, one side of the end plate is provided with two oppositely arranged wire passing steps; the metal terminal is arranged on the side of the end plate away from the middle column, the two metal terminals on the same side are oppositely arranged, the metal terminal comprises a terminal body and a first functional leg arranged side by side and partially connected, the first functional leg is provided with a wire binding groove, and the height of the wire binding groove is greater than the height of the bottom surface of the wire passing step. The coil is composed of wires wound on the middle column according to a predetermined rule, and the end part of the wire is wound on the wire binding groove through the wire passing step. This scheme sets the wire passing step on the end plate and sets the wire binding groove with a height greater than the height of the bottom surface of the wire passing step on the first functional leg, so that the wire does not need to be blocked during winding, the complexity of the winding process is reduced, and the wire efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0020] Figure 1 is a structural schematic diagram of the common mode inductance provided by the embodiment of the present application.
[0021] Figure 2 FIG. 1 is a structural schematic diagram of a magnetic core provided by an embodiment of the present application.
[0022] Figure 3 FIG. 2 is a structural schematic diagram of a metal terminal provided by an embodiment of the present application. DETAILED DESCRIPTION
[0023] The exemplary embodiments will be described in detail herein below with reference to the drawings. The following description is merely exemplary in nature and is not intended to limit the present application, as described, to the specific embodiments presented herein. Additionally, the description set forth herein is not intended to be exhaustive or otherwise limit the present application to the precise forms disclosed. Furthermore, many modifications and variations are possible in light of the above teachings. For example, it should be understood that the present application can be used in alternative embodiments that deviate from the specific examples described herein. It should also be understood that the present application can be used in combination with other applications and / or in combination with other processes.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used in the description herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0025] It should be understood that when an element or layer is referred to as being "on" or "adjacent" or "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or one or more intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on," "directly adjacent," "directly connected" or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be appreciated that, although terms such as first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms as these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. It will be understood that the terms so used are interchangeable under appropriate circumstances and embodiments of the present application are not limited to the above terms. Furthermore, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the drawings. For example, if the device described herein is turned over in use, a relative prefiix term such as "beneath" can be used to describe the
[0026] Spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” “below,” “upper,” “lower,” “inner,” “outer,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below” or “under” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly. Furthermore, terms such as “first,” “second,” etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] Current winding processes require the wire to be led out through terminals at right or oblique angles during actual winding, and then cut at the tail end. However, this winding process usually requires the use of wire-blocking mechanisms and fixing devices to ensure that the guide pin can complete precise winding. The winding process is complex, resulting in low production efficiency.
[0028] Based on this, embodiments of this application provide a common-mode inductor. The technical solution shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.
[0029] Please see Figure 1 , Figure 1 This application provides a schematic diagram of the structure of a common-mode inductor. The common-mode inductor may include a magnetic core 1, metal terminals 2, and a coil 3.
[0030] like Figure 2 As shown, the magnetic core 1 includes a central post 11 and end plates 12 connected to both ends of the central post 11. The magnetic core 1 is made of magnetic material. The size and shape of the central post 11 and the end plates 12 can be designed according to the application of the common-mode inductor and the required magnetic flux. For example, the cross-sectional area of the central post 11 can be designed to be larger to increase the magnetic flux transmission capacity, while the thickness of the end plates 12 can be appropriately increased to improve the magnetic permeability of the magnetic circuit and reduce the risk of magnetic saturation.
[0031] The metal terminal 2 is arranged on the side of the end plate 12 away from the center column 11, and two metal terminals 2 are arranged opposite to each other on the same side. In some embodiments, a boss structure 122 is arranged between the two metal terminals 2 on the same side. The boss structure 122 can isolate the two metal terminals 2 on the same side, effectively preventing short circuit problems caused by position deviation, accidental contact or electrical failure of the two metal terminals 2, and improving the safety and reliability of the common mode inductance. Moreover, the boss structure 122 is integrally formed with the end plate 12. Through the design of the boss structure 122 integrally formed with the end plate 12, the mechanical strength of the overall structure can be improved, and the possibility of loosening between components is reduced, thereby improving the anti-vibration capability of the common mode inductance.
[0032] In the embodiments of the present application, an adhesive layer (not shown in the figure) is arranged between the metal terminal 2 and the end plate 12. The metal terminal 2 and the end plate 12 are fixed by adhesion. The adhesive layer can be formed of a material with high adhesive strength to ensure that the metal terminal 2 and the end plate 12 do not relatively displace when subjected to external force impact or vibration, thereby maintaining the stability of the magnetic circuit.
[0033] In addition, the side of the metal terminal 2 away from the end plate 12 has a plating layer (not shown in the figure), which can significantly improve the corrosion resistance of the metal terminal 2, especially in humid or highly polluted environments, preventing poor contact problems caused by surface oxidation or corrosion of the metal terminal 2. Moreover, the plating layer can improve the surface flatness and conductivity of the metal terminal 2.
[0034] The coil 3 is formed by winding the wire 31 on the center column 11 according to a predetermined rule. The wire 31 can be a copper wire or an aluminum wire to provide good conductivity. The diameter of the wire 31 and the number of turns of the coil 3 can be selected according to the intended use and the required inductance value of the common mode inductance. In addition, the winding method of the coil 3 can be tight winding or loose winding to adapt to different inductance characteristics and thermal management requirements. Tight winding can reduce the capacitive effect between the coils 3, while loose winding can help dissipate heat and prevent overheating. In some cases, in order to further optimize performance, the surface of the wire 31 can be coated with an insulating layer to reduce leakage between adjacent turns and improve overall insulation performance.
[0035] In the embodiments of the present application, the end plate 12 has two opposite wire passing steps 121 arranged on one side. It should be noted that the two opposite wire passing steps 121 can be identical or different. In the embodiments of the present application, the included angle between the bottom surface and the side surface of the wire passing step 121 is greater than 90°. That is, the bottom surface and the side surface of the wire passing step 121 are both inclined surfaces.
[0036] In some embodiments, as shown in FIG. 6, the wire passing step 121 is arranged on the side of the end plate 12 away from the center column 11. The wire passing step 121 can be arranged on the side of the end plate 12 close to the center column 11. Figure 3As shown, the metal terminal 2 comprises a terminal body 21 and a first functional leg 22 arranged side by side and partially connected, and a wire binding groove 221 is arranged on the first functional leg 22, and the height of the wire binding groove 221 is greater than the bottom surface height of the wire passing step 121. The end of the wire 31 can be wound on the wire binding groove 221 through the wire passing step 121. The back of the wire binding groove 221 is bent towards the side away from the terminal body 21.
[0037] It can be understood that the size and depth of the wire binding groove 221 can be set according to actual conditions. The size and depth of the wire binding groove 221 can determine the number of turns of the wire and form support points during winding, thereby stabilizing and efficiently winding the wire.
[0038] In some embodiments, the connection part of the wire 31 and the wire binding groove 221 is provided with a welding structure. The welding structure can provide a firm wire 31 fixing method to prevent the wire 31 from loosening during use. It can also improve the electrical connection performance and ensure the stability of the electrical contact between the wire 31 and the metal terminal 2.
[0039] Since the bottom surface and the side surface of the wire passing step 121 are both inclined, and the height of the wire binding groove 221 arranged on the first functional leg 22 is greater than the bottom surface height of the wire passing step 121, the design cooperation of the wire passing step 121 and the wire binding groove 221 makes the threading process more convenient. Since the bottom surface and the side surface of the wire passing step 121 are both inclined, the position of the needle hole no longer needs to be fixed, but can be flexibly adjusted within a larger range, thereby avoiding the problem of blocking wire winding (i.e. without the help of a blocking mechanism). Such design reduces the complexity of the winding process, significantly improves the efficiency of the threading process, and also solves the instability problem of high-frequency inductance segmented wire arrangement. Through this improvement, a more efficient production process can be achieved, and the use cost of materials can be significantly reduced during the production process. In addition, since the back of the wire binding groove 221 is bent towards the side away from the terminal body 21, the inclined winding leg design of the wire binding groove 221 can be achieved to simplify the threading process without the help of any auxiliary tools, thereby effectively improving the efficiency of the threading operation.
[0040] It should be noted that the partially connected terminal body 21 and the first functional leg 22 mean that only the side away from the wire passing step 121 of the terminal body 21 and the first functional leg 22 is connected together, and the terminal body 21 and the first functional leg 22 have a gap except for the connection part. This design can reduce the contact area between the terminal body 21 and the first functional leg 22, thereby reducing the heat transfer path between the terminal body 21 and the first functional leg 22, to prevent damage to the adhesive layer between the terminal body 21 and the terminal plate 12 when welding the welding structure on the first functional leg 22.
[0041] In the embodiments of the present application, the distance between the first functional leg 22 and the terminal body 21 is greater than the diameter of the wire guide needle, so as to ensure the smooth passing of the wire guide needle and prevent the wire guide needle from being blocked. In some embodiments, the side of the first functional leg 22 away from the wire binding groove 221 is provided with a heat insulation groove 222, so as to further reduce the heat transfer path between the terminal body 21 and the first functional leg 22.
[0042] In some embodiments, the metal terminal 2 further comprises a second functional leg 23 connected to the terminal body 21 and extending towards the middle column 11, and the second functional leg 23 is buckled on the part of the end plate 12 between the two wire passing steps 121. The firm connection between the second functional leg 23 and the end plate 12 can further enhance the mechanical bonding strength between the metal terminal 2 and the end plate 12, and improve the durability and stability of the overall common mode inductance.
[0043] In summary, the common mode inductance provided by the embodiments of the present application comprises a magnetic core 1, a metal terminal 2 and a coil 3, wherein the magnetic core 1 comprises a middle column 11 and end plates 12 connected to both ends of the middle column 11, and the end plates 12 are provided with two oppositely arranged wire passing steps 121 on one side; the metal terminal 2 is arranged on the side of the end plate 12 away from the middle column 11, and the two metal terminals 2 are oppositely arranged on the same side, the metal terminal 2 comprises a terminal body 21 and a first functional leg 22 arranged side by side and partially connected, the first functional leg 22 is provided with a wire binding groove 221, and the height of the wire binding groove 221 is greater than the height of the bottom surface of the wire passing step 121. The coil 3 is composed of a wire 31 wound around the middle column 11 according to a predetermined rule, and the end of the wire 31 is wound on the wire binding groove 221 through the wire passing step 121. The present scheme sets the wire passing step 121 on the end plate 12, and sets the wire binding groove 221 with a height greater than the height of the bottom surface of the wire passing step 121 on the first functional leg 22, so that the wire winding does not need to be blocked during the winding process, which reduces the complexity of the winding process and improves the wire routing efficiency.
[0044] The common mode inductance provided by the present application is described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description of the present application should not be understood as a limitation.
Claims
1. A common mode inductor, characterized by The utility model relates to a magnetic core and metal terminal structure, including: A magnetic core, the magnetic core includes a center column and end pole plates connected to both ends of the center column, one side of the end pole plate is provided with two wire passing steps arranged oppositely; Metal terminals are arranged on the side of the end pole plate away from the center column, and the two metal terminals on the same side are arranged oppositely, the metal terminal includes a terminal body and a first functional foot arranged side by side and partially connected, a wire binding groove is arranged on the first functional foot, and the height of the wire binding groove is greater than the height of the bottom surface of the wire passing step; A coil is formed by winding a wire on the center column according to a preset rule, and the end of the wire is wound on the wire binding groove through the wire passing step.
2. The common mode inductance of claim 1, wherein, The back of the wire binding groove is bent towards the side away from the terminal body.
3. The common mode inductance of claim 1, wherein, A heat insulation groove is arranged on the side of the first functional foot away from the wire binding groove.
4. The common mode inductance of claim 1, wherein, The distance between the first functional foot and the terminal body is greater than the diameter of the wire winding guide needle.
5. The common mode inductance of claim 1, wherein, A boss structure is arranged between the two metal terminals on the same side, and the boss structure is integrally formed with the end pole plate.
6. The common mode inductance of claim 1, wherein, The metal terminal further includes a second functional foot connected to the terminal body and extending towards the center column, and the second functional foot is clamped on the part of the end pole plate between the two wire passing steps.
7. The common mode inductance of claim 1, wherein, The included angle between the bottom surface of the wire passing step and the side surface of the wire passing step is greater than 90 degrees.
8. The common mode inductance of claim 1, wherein, An adhesive layer is arranged between the metal terminal and the end pole plate.
9. The common mode inductance of claim 1, wherein, The side of the metal terminal away from the end pole plate has an electroplating layer.
10. The common mode inductance of claim 1, wherein, The connection part of the wire and the wire binding groove is provided with a welding structure.