CN219936820U - Magnetic core structure and inductor using same - Google Patents
Magnetic core structure and inductor using same Download PDFInfo
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- CN219936820U CN219936820U CN202321326755.1U CN202321326755U CN219936820U CN 219936820 U CN219936820 U CN 219936820U CN 202321326755 U CN202321326755 U CN 202321326755U CN 219936820 U CN219936820 U CN 219936820U
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- magnetic core
- core structure
- air gap
- inductor
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- 239000002131 composite material Substances 0.000 claims abstract description 10
- 239000002356 single layer Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000011162 core material Substances 0.000 description 37
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Abstract
The utility model relates to the technical field of magnetic cores, in particular to a magnetic core structure and an inductor applying the same, wherein the magnetic core structure comprises two cover plates and two sections of middle columns; the middle column is formed by stacking more than two middle column blocks, the upper end face and the lower end face of each middle column block are respectively provided with a groove, and two grooves attached in the middle column form a composite air gap; the two sections of the middle columns are symmetrically arranged between the two cover plates respectively, two ends of the middle columns are respectively abutted with two opposite faces of the two cover plates, and the grooves at the abutted positions form a single-layer air gap. The magnetic core structure is applied to the inductor, can meet the high-performance requirement without adding an air gap piece, and has the advantages of obviously improving the efficiency and saving the cost compared with the traditional inductor with the air gap piece.
Description
Technical Field
The utility model relates to the technical field of magnetic core structures, in particular to a magnetic core structure and an inductor using the same.
Background
An inductor is a device capable of converting electric energy into magnetic energy and storing the magnetic energy, and is widely used in various circuit configurations. The inductor generally comprises a framework, a magnetic core and a coil, wherein the magnetic core is made of a high-frequency magnetic conductive material and has the characteristics of high magnetic conductivity and high magnetic flux density.
Along with the mature application of the high-power inductor in the solar photovoltaic inverter, the charging pile, the UPS and the energy storage device, in order to meet the requirements of high performance and low cost of the power inductor, a magnetic core material with a relatively dominant price is generally selected to increase an air gap piece to realize high inductance, but the addition of the air gap piece brings complicated working procedures and material cost to the manufacturing process, and the problem of unstable inductance adjustment of the manufacturing process.
Disclosure of Invention
The utility model aims to provide a magnetic core structure and an inductor using the same, which can solve the problems of increased production cost and unstable inductance adjustment of a manufacturing process in the background technology.
To achieve the purpose, the utility model adopts the following technical scheme:
a magnetic core structure comprises two cover plates and two sections of middle columns;
the middle column is formed by stacking more than two middle column blocks, the upper end face and the lower end face of each middle column block are respectively provided with a groove, and two grooves attached in the middle column form a composite air gap;
the two sections of the middle columns are symmetrically arranged between the two cover plates respectively, two ends of the middle columns are respectively abutted with two opposite faces of the two cover plates, and the grooves at the abutted positions form a single-layer air gap.
Preferably, the projection shape of the groove is circular, square, elliptical or other shape.
Preferably, the projection area of the groove is 0.3-0.7 times of the projection area of the center pillar block.
Preferably, the depth of the groove is 0.18mm.
Preferably, the cover plate consists of a square column powder core block and two semi-cylindrical powder core blocks, and the two semi-cylindrical powder core blocks are respectively arranged at two opposite ends of the square column powder core block.
Preferably, the middle column block is a cylindrical block.
Preferably, the stacking positions of the plurality of middle column blocks and the abutting positions of the middle column blocks and the two cover plates are bonded by adhesive.
An inductor comprising a coil, characterized by further comprising a magnetic core structure as described above, said coil being wound around a leg of said magnetic core structure.
One of the above technical solutions has the following beneficial effects: the magnetic core structure is applied to a traditional encapsulation inductor, and adopts a structure that more than two middle column blocks are mutually stacked to be recombined to form a middle column, wherein the upper end face and the lower end face of the column blocks are respectively provided with grooves, a composite air gap can be formed at a stacked position, a single-layer air gap can be formed at a butt joint position between two opposite faces of the cover plate, and an effect of removing the air gap is achieved. In the use process of the inductor, the combination of the composite air gap and the single-layer air gap can further reduce the loss of the inductor and improve the inductance of the inductor.
Drawings
FIG. 1 is a schematic illustration of the magnetic core structure of the present utility model;
FIG. 2 is a schematic perspective view of the magnetic core structure of the present utility model;
FIG. 3 is a schematic view of the structure of the center pillar of the magnetic core structure of the present utility model;
FIG. 4 is a schematic dimensional view of one embodiment of a magnetic core structure of the present utility model;
FIG. 5 is a schematic dimensional view of one embodiment of a center pillar of the magnetic core structure of the present utility model;
in the accompanying drawings: cover plate 1, center pillar 2, center pillar block 21, groove 22, single layer air gap 3, and composite air gap 4.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-5, a magnetic core structure comprises two cover plates 1 and two sections of middle posts 2;
the middle column 2 is formed by stacking more than two middle column blocks 21, the upper end face and the lower end face of each middle column block 21 are respectively provided with a groove 22, and two grooves 22 attached in the middle column 2 form a composite air gap 4;
the two sections of the middle columns 2 are symmetrically arranged between the two cover plates 1 respectively, two ends of the middle columns 2 are abutted against two opposite surfaces of the two cover plates 1 respectively, and the grooves 22 at the abutted positions form a single-layer air gap 3.
The magnetic core structure is applied to a traditional encapsulation inductor, and adopts a structure that more than two middle column blocks 21 are mutually stacked to be recombined to form a middle column 2, wherein the upper end face and the lower end face of each column block 21 are respectively provided with a groove 22, a composite air gap 4 can be formed at a stacked position, a single-layer air gap 3 can be formed at a butt joint position between two opposite faces of the cover plate 1, and an air gap removing effect is achieved. In the use process of the inductor, the combination of the composite air gap 4 and the single-layer air gap 3 can further reduce the loss of the inductor and improve the inductance of the inductor.
Furthermore, the magnetic core structure does not need to add an air gap piece, so that the material cost can be reduced by 1%, the labor hour is shortened by 5%, meanwhile, grooves 22 are respectively formed in the upper end face and the lower end face of the middle column block 21, the inductance consistency is higher, and the magnetic core structure is suitable for all powder core power inductors.
In conclusion, the magnetic core structure is applied to the inductor, the high performance requirement can be met without adding an air gap piece, and compared with the traditional inductor added with the air gap piece, the magnetic core structure has the advantages of obviously improving efficiency and saving cost.
In one embodiment, the center pillar 2 is formed by stacking three center pillar blocks 21 on top of each other.
As further illustrated, the recess 22 has a projected shape that is circular, square, oval, or other shape.
To further illustrate, the projected area of the recess 22 is 0.3-0.7 times the projected area of the center pillar 21.
In other embodiments, the projection shape and the projection area of the recess 22 may be set according to actual requirements.
As further illustrated, the recess 22 has a depth of 0.18mm. In particular, the recess 22 may be formed in one piece on a pressing die, the depth of the recess 22 being adjusted according to the amount of inductance, in one embodiment the recess 22 has a thickness of 0.18mm,
in other embodiments, the depth of the recess 22 may be set according to actual requirements. Through practical tests, the composite air gap 4 and the single-layer air gap 3 formed by the grooves 22 at this depth can achieve the best effect.
Further describing, the cover plate 1 is composed of a square column powder core block and two semi-cylindrical powder core blocks, wherein the two semi-cylindrical powder core blocks are respectively arranged at two opposite ends of the square column powder core block.
In one specific embodiment, the length of the cover plate 1 is 122.00mm, the width of the cover plate 1 is 72.00mm, and the thickness of the cover plate 1 is 16.00mm.
Further illustratively, the center pillar block 21 is a cylindrical block. In one embodiment, the diameter of the center pillar block 21 is 40.00mm, and the thickness of the center pillar block 21 is 17.20mm. The projection shape of the groove 22 is circular, and the diameter of the groove 22 is 25.00mm.
Further, the stacking portion of the plurality of middle pillar blocks 21 and the abutting portion of the middle pillar block 21 and the two cover plates 1 are bonded by using adhesive. Specifically, the stacking surfaces of the middle column block 21 and the abutting surfaces between the middle column block 21 and the cover plate 1 are filled with adhesive, and after the fixing and forming, the adhesive at the bonding position can achieve the effect of opening an air gap.
An inductor comprises a coil and the magnetic core structure, wherein the coil is wound on a center post 2 of the magnetic core structure. This inductor reduces the magnetic core structure's leakage magnetic flux through seting up two at least air gaps on the magnetic core structure to reduce magnetic core loss, and can reduce the cutting of coil to the leakage magnetic flux of magnetic core structure, reduce the eddy current loss of coil, improve the inductance value of inductor.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art from consideration of this specification without the exercise of inventive faculty, and such equivalent modifications and alternatives are intended to be included within the scope of the utility model as defined in the claims.
Claims (8)
1. The magnetic core structure is characterized by comprising two cover plates and two sections of middle columns;
the middle column is formed by stacking more than two middle column blocks, the upper end face and the lower end face of each middle column block are respectively provided with a groove, and two grooves attached in the middle column form a composite air gap;
the two sections of the middle columns are symmetrically arranged between the two cover plates respectively, two ends of the middle columns are respectively abutted with two opposite faces of the two cover plates, and the grooves at the abutted positions form a single-layer air gap.
2. A magnetic core structure according to claim 1, wherein the projection shape of the recess is circular, square or oval.
3. A magnetic core structure according to claim 2, wherein the projected area of the recess is 0.3-0.7 times the projected area of the center pillar.
4. A magnetic core structure according to claim 3, wherein the depth of the recess is 0.18mm.
5. The magnetic core structure of claim 1, wherein the cover plate is composed of a square pillar powder core block and two semi-cylindrical powder core blocks, and the two semi-cylindrical powder core blocks are respectively arranged at two opposite ends of the square pillar powder core block.
6. A magnetic core structure according to claim 1, wherein said center pillar is a cylindrical block.
7. The magnetic core structure of claim 1, wherein the stacking portion of the plurality of center pillar blocks and the abutting portion of the center pillar block and the two cover plates are bonded by adhesive.
8. An inductor comprising a coil, further comprising the magnetic core structure of any of claims 1-7, the coil wound on a center leg of the magnetic core structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321326755.1U CN219936820U (en) | 2023-05-29 | 2023-05-29 | Magnetic core structure and inductor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321326755.1U CN219936820U (en) | 2023-05-29 | 2023-05-29 | Magnetic core structure and inductor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219936820U true CN219936820U (en) | 2023-10-31 |
Family
ID=88494288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321326755.1U Active CN219936820U (en) | 2023-05-29 | 2023-05-29 | Magnetic core structure and inductor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219936820U (en) |
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2023
- 2023-05-29 CN CN202321326755.1U patent/CN219936820U/en active Active
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