CN216435628U - Inductance structure with pile up magnetic core - Google Patents
Inductance structure with pile up magnetic core Download PDFInfo
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- CN216435628U CN216435628U CN202122978292.4U CN202122978292U CN216435628U CN 216435628 U CN216435628 U CN 216435628U CN 202122978292 U CN202122978292 U CN 202122978292U CN 216435628 U CN216435628 U CN 216435628U
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- 239000000463 material Substances 0.000 claims description 5
- 238000002788 crimping Methods 0.000 claims description 3
- 238000003618 dip coating Methods 0.000 claims description 2
- 239000002966 varnish Substances 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 2
- 238000004804 winding Methods 0.000 abstract description 17
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 63
- 230000008859 change Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000003796 beauty Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
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Abstract
The utility model provides an inductance structure with stacked magnetic cores, which comprises a magnetic core and a coil; the magnetic core comprises a plurality of sequentially stacked sub-magnetic cores, and the sub-magnetic cores are arranged annularly; the coil is wound on the magnetic core along the annular trend of the magnetic core; the number of layers of the coil positioned on the outer side of the magnetic core is one, and the number of layers of the coil positioned on the inner side of the magnetic core is multiple. The utility model provides a technical scheme's beneficial effect is: a plurality of magnetic cores are stacked, compared with a single magnetic core, the number of turns of a coil winding can be reduced while the required inductance is achieved, so that the loss is reduced, and the utilization rate of the window area of the magnetic core can be increased; the magnetic core outside only one deck coil winding, there is the structure of multilayer coil winding the magnetic core inboard, can reduce the influence of distributed capacitance between the winding, reduces magnetic field intensity simultaneously, reduces the loss, has improved the efficiency of circuit, has certain thermal stability.
Description
Technical Field
The utility model relates to an inductance technical field especially relates to an inductance structure with pile up magnetic core.
Background
An inductor is a component that can convert electrical energy into magnetic energy for storage, and is similar in structure to a transformer but has only one winding. Inductors are typically comprised of a bobbin, coil winding, shield, potting material, magnetic core or core, and the like. In a circuit, an inductor has a large volume, and in order to increase the power density of the circuit, it is necessary to increase the frequency and reduce the volume of elements such as the inductor and the transformer. Therefore, in high frequency operation, it is important to select a suitable core and coil winding configuration to reduce the loss of inductance.
SUMMERY OF THE UTILITY MODEL
In view of the above, to solve the above problem, embodiments of the present invention provide an inductor structure with stacked magnetic cores.
An embodiment of the utility model provides an inductance structure with pile up magnetic core, include:
the magnetic core comprises a plurality of sequentially stacked sub-magnetic cores, and the sub-magnetic cores are arranged annularly;
the coil is wound on the magnetic core along the annular trend of the magnetic core;
the number of layers of the coil positioned on the outer side of the magnetic core is one, and the number of layers of the coil positioned on the inner side of the magnetic core is multiple.
Further, the number of layers of the coil positioned inside the magnetic core is within 3.
Further, the number of layers of the coil positioned on the inner side of the magnetic core is 2.
Further, the number of the sub-magnetic cores is two; and/or the presence of a gas in the gas,
the sub magnetic cores are made of the same material; and/or the presence of a gas in the gas,
the plurality of sub-cores are the same size.
Further, the outermost layer of the coil is provided with an insulating layer.
Further, the insulating layer is made of insulating varnish.
Furthermore, the two ends of the coil are respectively provided with a connecting terminal.
Further, the wiring terminal is a cold-pressed terminal.
Further, the coil is provided with an exposed part opposite to the wiring terminal, and the exposed part is subjected to paint dipping treatment after being welded with the wiring terminal.
Further, binding post has relative wiring portion and fixed part, the wiring portion is the U-shaped setting, and the crimping in on the coil, one of them one end of wiring portion is located the magnetic core is inboard, the other end with the fixed part is located the magnetic core outside.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: a plurality of magnetic cores are stacked, compared with a single magnetic core, the number of turns of a coil winding can be reduced while the required inductance is achieved, so that the loss is reduced, and the utilization rate of the window area of the magnetic core can be increased; the magnetic core outside only one deck coil winding, there is the structure of multilayer coil winding the magnetic core inboard, can reduce the influence of distributed capacitance between the coil winding, reduces magnetic field intensity simultaneously, reduces the loss, has improved the efficiency of circuit, has certain thermal stability.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an inductor structure with stacked magnetic cores according to the present invention;
FIG. 2 is a schematic diagram of the structure of the magnetic core of FIG. 1;
FIG. 3 is a top view of the core and coil of FIG. 1;
FIG. 4 is a graph of magnetic core material permeability change;
fig. 5 is a graph of magnetic core material loss density as a function of magnetic flux density and frequency.
In the figure: magnetic core 1, sub-magnetic core 1a, coil 2, connection terminal 3, wiring portion 3a, and fixing portion 3 b.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides an inductance structure with stacked magnetic cores, including a magnetic core 1, a coil 2 and a connection terminal 3.
The magnetic core 1 comprises a plurality of sub magnetic cores 1a which are sequentially stacked, and the plurality of sub magnetic cores 1a are arranged in an annular shape; the coil 2 is wound on the magnetic core 1 along the annular trend of the magnetic core 1; the number of layers of the coil 2 located on the outer side of the magnetic core 1 is one, and the number of layers of the coil 2 located on the inner side of the magnetic core 1 is multiple.
The utility model stacks a plurality of magnetic cores 1, compared with a single magnetic core 1, the number of turns of the coil winding can be reduced while the required inductance is achieved, thereby reducing the loss and increasing the utilization rate of the window area of the magnetic core 1; the magnetic core 1 outside only one deck coil winding, 1 inboard of magnetic core has the structure of multilayer coil winding, can reduce the influence of distributed capacitance between the coil winding, reduces magnetic field intensity simultaneously, reduces the loss, has improved the efficiency of circuit, has certain thermal stability.
Specifically, the number of layers of the coil 2 located inside the magnetic core 1 is within 3, and it can be understood that the larger the difference between the inner diameter and the outer diameter of the magnetic core 1 is, the larger the number of layers inside the magnetic core 1 is, and in this embodiment, the number of layers of the coil 2 located inside the magnetic core 1 is 2.
The number of the sub-magnetic cores 1a is two, the material and the size of the sub-magnetic cores 1a are the same, and the material of the sub-magnetic cores 1a is selected according to the saturation magnetic flux density, the working frequency and the loss.
The outermost layer of the coil 2 is provided with an insulating layer made of insulating paint, and the coil 2 selects proper turns and strands according to the inductance value obtained by circuit calculation and the parameters of the magnetic core 1.
The two ends of the coil 2 are respectively provided with a connecting terminal 3, and the terminals are cold-pressed terminals, in this embodiment, OT-100A cold-pressed terminals. Coil 2 have with binding post 3 relative exposed department, exposed department with binding post 3 welds the back and is the dip coating and handles, can effectively protect coil 2 and binding post 3.
Further, binding post 3 has relative wiring portion 3a and fixed part 3b, wiring portion 3a is the U-shaped setting, and the crimping in on the coil 2, wiring portion 3a wherein one end is located 1 inboard of magnetic core, the other end with fixed part 3b is located 1 outside of magnetic core, can increase coil 2 and binding post 3's area of contact, make the wiring portion 3a pressurized parcel of the terminal of colding pressing on coil 2, guarantee coil 2 and the conductivity of the terminal of colding pressing.
Taking the inductance of a BUCK circuit (input 1200V, output 700V, 120uH at zero current, 79uH at maximum current 95A) working at 50kW/85kHz as an example, FIG. 4 is a graph of the change of the magnetic permeability of a magnetic core material (magnetic beauty 0079615A7), FIG. 5 is a graph of the change of the loss density of the magnetic core material (magnetic beauty 0079615A7) with the magnetic flux density and the frequency, the magnetic permeability of the magnetic core material continuously changes with the magnetic field intensity, and the magnetic core material corresponds to different inductance values at different current values. And a Kool M and MAX magnetic core is selected, and a low-loss magnetic core material is adopted, so that the efficiency can be improved, and overheating can be avoided.
The coil 2 is wound by adopting enameled wires in a multi-strand manner, so that the number of turns is reduced, and the loss is reduced. In the embodiment, a three-strand parallel winding mode is adopted, so that the influence of the skin effect is reduced to a certain extent. The inductor is formed by winding three strands of 27 turns of enameled wires with the diameter of 1.8mm in parallel, and an inductance leading-out terminal is an OT-100A cold-pressed terminal, is welded after being pressed and then is subjected to paint dipping post-treatment.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. An inductor structure having stacked magnetic cores, comprising:
the magnetic core comprises a plurality of sequentially stacked sub-magnetic cores, and the sub-magnetic cores are arranged annularly;
the coil is wound on the magnetic core along the annular trend of the magnetic core;
wherein, be located the magnetic core outside the number of piles of coil is the one deck, is located the magnetic core is inboard the number of piles of coil is the multilayer, the coil both ends are provided with binding post respectively, the coil have with binding post relative exposed department, exposed department with binding post welds the back and is the dip coating and handles, binding post has relative wiring portion and fixed part, wiring portion is the U-shaped setting, and the crimping in on the coil, wiring portion wherein one end is located the magnetic core is inboard, the other end with the fixed part is located the magnetic core outside.
2. The inductor structure with stacked cores of claim 1, wherein the number of layers of the coil inside the core is within 3.
3. The inductor structure with stacked cores according to claim 2, wherein the number of layers of the coil inside the core is 2.
4. The inductive structure with stacked magnetic cores of claim 1, wherein the number of sub-magnetic cores is two; and/or the presence of a gas in the gas,
the sub magnetic cores are made of the same material; and/or the presence of a gas in the gas,
the plurality of sub-cores are the same size.
5. The inductor structure with stacked cores according to any one of claims 1 to 4, wherein the outermost layer of the coil is provided with an insulating layer.
6. The inductive structure with stacked magnetic cores of claim 5, wherein the insulating layer is made of insulating varnish.
7. The inductor structure with stacked cores of claim 1, wherein the terminal blocks are cold-pressed terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978292.4U CN216435628U (en) | 2021-11-29 | 2021-11-29 | Inductance structure with pile up magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978292.4U CN216435628U (en) | 2021-11-29 | 2021-11-29 | Inductance structure with pile up magnetic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216435628U true CN216435628U (en) | 2022-05-03 |
Family
ID=81340840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122978292.4U Active CN216435628U (en) | 2021-11-29 | 2021-11-29 | Inductance structure with pile up magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216435628U (en) |
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2021
- 2021-11-29 CN CN202122978292.4U patent/CN216435628U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An Inductive Structure with Stacked Magnetic Cores Granted publication date: 20220503 Pledgee: Industrial Bank Limited by Share Ltd. Wuhan branch Pledgor: Wuhan Yibian Electric Co.,Ltd. Registration number: Y2024980008858 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |