Flat coil common mode inductor
By designing the flat coil common mode inductor, using a flat coil and a detachable C-shaped magnetic block structure, the problem of low utilization rate of circular core windows and difficulty in automatic winding in the prior art is solved, miniaturization and automated production of inductors are realized, and efficiency and heat dissipation performance are improved.
Patent Information
- Application Number
- CN202421547021.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-02
AI Technical Summary
Under the demands of higher frequency, greater power, higher efficiency and smaller volume, the window utilization rate of the circular magnetic core is low and difficult to automatically wind, resulting in high processing costs and low efficiency.
A flat coil common mode inductor is designed, using a flat coil and a detachable C-shaped magnetic block structure, and the base is equipped with a fixed structure for fixed coil leads, which is suitable for mechanical automation winding.
The miniaturization and automated production of inductors are realized, which reduces processing costs and time, improves efficiency, and improves the thermal performance of inductors through the design of flat coils.
Smart Images
Figure CN222939739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inductors, in particular to a flat coil common mode inductor. Background Art
[0002] For common mode inductors, the current market pursues higher frequency, higher power, higher efficiency and smaller volume. Most of the existing common mode inductors adopt circular magnetic cores for product design. Although circular magnetic rings have the advantages of small stray magnetic field and low magnetic core cost, due to the small aperture of the circular magnetic core, the window utilization rate is relatively low. And the existing magnetic rings usually adopt integral magnetic rings, which are difficult for machines to wind automatically and need to be wound or assembled manually, consuming time and effort, with high processing costs and low efficiency.
[0003] Therefore, it is necessary to design a common mode inductor that is miniaturized and suitable for mechanical automation. Summary of the Utility Model
[0004] In order to solve the above problems, the flat coil common mode inductor provided by the utility model is small in size, simple in structure, and stable in installation, not easily broken or damaged.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A flat coil common mode inductor includes a base, a magnetic core and a coil. The coil includes a first coil and a second coil. The first coil is connected to the second coil. The leads of the first coil and the second coil are respectively fixed on both sides of the base. The first coil and the second coil are both wound around both sides of the magnetic core. The magnetic core includes an upper magnetic core and a lower magnetic core. The lower magnetic core is fixedly installed on the base. Fixed structures are provided on both sides of the base for fixing the leads of the coil. The leads of the coil are fixed on the base through the fixed structures.
[0007] Optionally, in an embodiment of the utility model, the upper magnetic core and the lower magnetic core are C-shaped magnetic blocks. The upper magnetic core and the lower magnetic core are spliced relatively to form a magnetic core. Both sides of the upper magnetic core and the lower magnetic core are winding parts, and the winding parts are in a flat elliptical cylinder structure.
[0008] Optionally, in an embodiment of the utility model, both the first coil and the second coil are flat coils, and the shapes of the first coil and the second coil are both in a racetrack structure.
[0009] Optionally, in an embodiment of the utility model, both the first coil and the second coil are any one of silver wire coils, aluminum wire coils or copper wire coils.
[0010] Optionally, in an embodiment of the present utility model, the fixing structure includes pins and a fixing component. The pins are in a sheet structure, and the fixing component includes a matching screw and nut.
[0011] Optionally, in an embodiment of the present utility model, the size of the pins is larger than the size of the leads of the coil. The pins are copper pins, and mounting holes are provided in the upper part of the copper pins for mounting the fixing component.
[0012] Optionally, in an embodiment of the present utility model, insulating sheets are covered at both ends of the coil. The shape and size of the insulating sheets are the same as those of both ends of the coil.
[0013] Optionally, in an embodiment of the present utility model, grid-shaped reinforcing ribs are provided at the bottom of the base.
[0014] Optionally, in an embodiment of the present utility model, a groove is provided in the base for embedding and mounting the lower magnetic core.
[0015] Optionally, in an embodiment of the present utility model, the crossbeam sizes of the upper magnetic core and the lower magnetic core are larger than the size of the winding part. Through the large sizes of the crossbeams, the coil is limited vertically.
[0016] Advantages of the present utility model
[0017] For the flat coil common mode inductor of the present utility model, the overall structure is simple, the processing is easier, the cost is lower, the magnetic core adopts a split structure, which is convenient for assembly and mechanical automatic winding. The coil adopts a flat coil, which can further compress the longitudinal height of the inductor. The distance between coils is small, making full use of the window space. Most of the coils can directly contact the external air, and the inductor has good heat dissipation. A larger-sized sheet metal is used alone as the pin on the base, which is not easy to break during use and is more firmly installed. Description of the drawings
[0018] 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 use in the description of the embodiments or the prior art.
[0019] Figure 1 Schematic diagram of the overall structure of the inductor in Embodiment 1 of the present utility model Figure 1 ;
[0020] Figure 2 Schematic diagram of the overall structure of the inductor in Embodiment 1 of the present utility model Figure 2 ;
[0021] Figure 3 Schematic diagram of the structure of the upper magnetic core in Embodiment 1 of the present utility model;
[0022] Reference numerals: base 1, reinforcing rib 101, upper magnetic core 2, lower magnetic core 3, first coil 4, second coil 5, insulating sheet 6, fixing structure 7. Detailed implementation manners
[0023] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying 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. 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.
[0024] In the description of the present 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. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These are 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. Therefore, it should not be construed as a limitation of the present utility model.
[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, 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" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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.
[0027] In the present utility model, unless otherwise clearly defined and limited, 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 indirectly in 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 simply indicates that the horizontal height of the first feature is higher than that of 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 simply indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also 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.
[0029] 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 manners, structures, features and their effects according to the present utility model as follows. Embodiment
[0030] In order to meet the design requirements of compact installation, miniaturization and integration, a flat coil common mode inductor is designed, and the specific scheme is as follows:
[0031] As Figures 1-3 shown, a flat coil common mode inductor includes a base 1, a magnetic core 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 leads of the first coil 4 and the second coil 5 are respectively fixed on both sides of the base 1. The first coil 4 and the second coil 5 are both wound around both sides of the magnetic core. The magnetic core includes an upper magnetic core 2 and a lower magnetic core 3. The lower magnetic core 3 is fixedly installed on the base 1. Fixing structures 7 are provided on both sides of the base 1 for fixing the leads of the coil. The leads of the coil are fixed on the base 1 through the fixing structures 7.
[0032] The upper magnetic core 2 and the lower magnetic core 3 are C-shaped magnetic blocks. The upper magnetic core 2 and the lower magnetic core 3 are spliced oppositely to form a magnetic core. Both sides of the upper magnetic core 2 and the lower magnetic core 3 are winding parts, and the winding parts are in a flat elliptical cylindrical structure.
[0033] Both the first coil 4 and the second coil 5 are flat coils. The shapes of the first coil 4 and the second coil 5 are both in a racetrack-like structure. Compared with circular wire coils, in the case of the same space, flat coils can wind more turns of wire, have greater magnetic field energy, and also have a greater coil inductance.
[0034] Both the first coil 4 and the second coil 5 can be any one of silver wire coils, aluminum wire coils, or copper wire coils.
[0035] In this embodiment, both the first coil 4 and the second coil 5 are aluminum wire coils. Aluminum wire coils can reduce the cost of the coils. In other solutions, when higher-quality and higher-performance inductors are required, copper wire coils or silver wire coils can be used.
[0036] The fixing structure 7 includes pins and fixing components. The pins are in a sheet-like structure, and the fixing components include matching screws and nuts.
[0037] The size of the pins is larger than the size of the leads of the coil. The pins are copper pins, and mounting holes are provided in the upper part of the copper pins for mounting the fixing components.
[0038] In this embodiment, two mounting holes are provided in the upper part of the pins. Two fixing components are respectively mounted on each pin. Correspondingly, two matching fixing holes are provided at the front end of the leads of the coil. The coil leads are fixed to the pins through the fixing components. The leads of the coil are led out above the fixing structure 7 and bent downward to be close to the pins for fixing.
[0039] In this embodiment, two fixing structures 7 are provided on the base 1, which are respectively located in the diagonal directions of the base 1.
[0040] Insulating sheets 6 are covered on both ends of the coil. The shape and size of the insulating sheets 6 are the same as those of both ends of the coil.
[0041] In this embodiment, the insulating sheets 6 are in an 8-shaped configuration. One insulating sheet 6 is provided on each of the upper and lower surfaces of the coil.
[0042] Reinforcing ribs 101 in a grid-like pattern are provided at the bottom of the base 1 to ensure the strength of the base 1 and prevent it from being easily deformed or broken.
[0043] A groove is provided on the base 1 for embedding and mounting the lower magnetic core 3.
[0044] The crossbeam sizes of the upper magnetic core 2 and the lower magnetic core 3 are larger than the size of the winding part. Through the large sizes of the crossbeams, the coil is limited vertically.
[0045] The crossbeam sizes being larger than the size of the winding part can keep the coil stable at the winding part position of the magnetic core and prevent the coil from moving vertically and causing deformation.
[0046] The common-mode inductor of this solution has a simple structure. It adopts a flat coil, making the volume more flattened and easier for production and processing. The magnetic core uses a U-shaped magnetic core, which is suitable for automatic equipment to wind the coil, facilitating the improvement of production efficiency. The pins of the inductor use pins with larger sizes, making the installation of the inductor more stable and the pins not easily breakable. Embodiment
[0047] In this embodiment, the structure of the inductor is basically the same as that of Embodiment 1. The difference is that a U-shaped fixing buckle is also provided at the top of the magnetic core. The front end of the fixing buckle is the buckle end, and slots are opened on both sides of the base 1. The fixing buckle can fix the magnetic core more stably on the base 1.
[0048] 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 a simplified description for facilitating the description of the present invention, 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 understood as a limitation on the protected content of the present invention.
[0049] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A flat coil 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 lead of the first coil and the lead of the second coil are respectively fixed on both sides of the base, the first coil and the second coil are both wound on both sides of the magnetic core, the magnetic core includes an upper magnetic core and a lower magnetic core, the lower magnetic core is fixedly installed on the base, and fixed structures are provided on both sides of the base for fixing the leads of the coils, and the leads of the coils are fixed to the base through the fixed structures.
2. The flat coil common mode inductor according to claim 1, characterized in that: The upper magnetic core and the lower magnetic core are C-shaped magnetic blocks, which are spliced together to form a magnetic core. Both sides of the upper magnetic core and the lower magnetic core are winding parts, and the winding parts are flat elliptical columnar structures.
3. The flat coil common mode inductor according to claim 1, characterized in that: The first coil and the second coil are both flat coils, and the shapes of the first coil and the second coil are both runway-shaped structures.
4. The flat coil common mode inductor according to claim 1, characterized in that: The first coil and the second coil are any one of a silver wire coil, an aluminum wire coil or a copper wire coil.
5. The flat coil common mode inductor according to claim 1, characterized in that: The fixing structure includes a pin and a fixing component, the pin is a sheet-like structure, and the fixing component includes a matching screw and nut.
6. The flat coil common mode inductor according to claim 5, characterized in that: The pin size is larger than the lead size of the coil, the pin is a copper pin, and a mounting hole is provided on the upper part of the copper pin for mounting a fixing component.
7. The flat coil common mode inductor according to claim 1, characterized in that: Both ends of the coil are covered with insulating sheets, and the shape and size of the insulating sheets are the same as those of the two ends of the coil.
8. The flat coil common mode inductor according to claim 1, characterized in that: The bottom of the base is provided with grid-shaped reinforcing ribs.
9. The flat coil common mode inductor according to claim 1, characterized in that: The base is provided with a groove for embedding and installing the lower magnetic core.
10. The flat coil common mode inductor according to claim 1, characterized in that: The size of the cross beams of the upper magnetic core and the lower magnetic core is larger than the size of the winding part, and the coil is limited up and down by the large size of the cross beams.