KR101813359B1 - Inductor - Google Patents
Inductor Download PDFInfo
- Publication number
- KR101813359B1 KR101813359B1 KR1020160011575A KR20160011575A KR101813359B1 KR 101813359 B1 KR101813359 B1 KR 101813359B1 KR 1020160011575 A KR1020160011575 A KR 1020160011575A KR 20160011575 A KR20160011575 A KR 20160011575A KR 101813359 B1 KR101813359 B1 KR 101813359B1
- Authority
- KR
- South Korea
- Prior art keywords
- inductor
- air gap
- magnetic
- magnetic body
- coil
- Prior art date
Links
- 239000006249 magnetic particle Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
Abstract
The present invention relates to a magnetic bearing having a coil having at least one lead portion and including a magnetic body including magnetic particles and an external electrode disposed on an outer surface of the magnetic body, To an inductor including an air gap.
Description
The present invention relates to an inductor, for example, to a power inductor.
With the recent miniaturization and high performance of electronic devices, CPUs and various LSIs are becoming high-performance and high-frequency signals, but the power consumption increases accordingly. The operating voltage tends to be lowered at the request of such high efficiency and the operating current is increasing.
Therefore, the basic design direction of the power inductor is to suppress the change of the L value according to the current by improving the DC-Bias characteristic and to develop the magnetic material and improve the inductor structure to improve the DC-Bias characteristic It is true.
The following
The present invention attempts to improve the DC-Bias characteristics of an inductor by forming an air gap having an excellent gap characteristic without a separate design change in a conventional inductor.
According to an embodiment of the present invention, there is provided an inductor including a magnetic body embedded with a coil having at least one lead portion and including magnetic particles, and an external electrode disposed on an outer surface of the magnetic body. In this case, the magnetic body includes an air gap having a cavity therein, and the abrupt rate of change of the inductance through the air gap is reduced, thereby improving the DC-Bias characteristic.
The present invention can provide an inductor having an air gap excellent in gap characteristic.
The present invention can provide an inductor having an excellent air gap without any additional structural design and material design changes.
The present invention can provide an inductor having excellent DC-Bias characteristics.
INDUSTRIAL APPLICABILITY The present invention can provide an inductor capable of reducing the production cost by reducing the material cost by using an air gap instead of the conventional nonmagnetic body sheet.
1 is a schematic perspective view of an inductor according to one example of the present invention.
2 is a cross-sectional view taken along line I-I 'of FIG.
3 is a graph showing DC-Bias characteristics of an inductor according to an example of the present invention.
Hereinafter, embodiments of the present invention will be described with reference to specific embodiments and the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.
It is to be understood that, although the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Will be described using the symbols.
Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.
Hereinafter, an inductor according to an exemplary embodiment of the present invention will be described, but the present invention is not limited thereto.
Inductor
FIG. 1 is a schematic perspective view of an inductor according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line I-I 'of FIG. 1. Referring to FIG.
Referring to FIG. 1, an
Referring to FIG. 1, the
On the other hand, the
The magnetic particles contained in the
Also, on the outer surface of the outer surface of the
The shape of the outer surface of the magnetic body, for example, the shape in the case where the magnetic particle is removed to have an empty space, and the shape in which at least a part of the magnetic particle is cut and the outer surface are in contact, And the like. The process of forming the magnetic body is a process of placing a coil having a winding structure on a support frame having a predetermined void space and stacking and pressing a plurality of magnetic sheets on the upper and lower surfaces of the coil to form a lamination bar bar, and cutting the laminated bar into separate bodies, but the present invention is not limited thereto.
Referring to FIG. 2, a
The
The
An
The
It is preferable that the
The
A plurality of the
FIG. 3 is a graph illustrating DC-Bias characteristics of an inductor according to an exemplary embodiment of the present invention. Referring to FIG. 3, an inductor according to an exemplary embodiment of the present invention includes an air gap, Bias characteristics are described.
Referring to FIG. 3, an inductor formed with an air gap according to an exemplary embodiment of the present invention has a lower rate of inductance change than an inductor having no gap formed therein. Although not shown in FIG. 3, an inductor formed with an air gap exhibits a DC-Bias characteristic similar to that of an inductor in which a gap is formed by inserting a non-conductive nonmagnetic sheet.
This means that the inductor according to an embodiment of the present invention effectively blocks the magnetic flux generated from the coil of the inductor even if an air gap is used in place of the non-magnetic sheet, thereby preventing a sharp decrease in inductance. According to the existing method, when inserting the non-magnetic sheet, a separate material design and structure design are required, and an air gap having an excellent gap characteristic is formed without a complicated additional process.
The method of forming the
According to an embodiment of the present invention, there is provided a non-magnetic sheet which has an air gap having an excellent gap characteristic without a separate structural design and a change in material design, has excellent DC-Bias characteristics, It is possible to provide an inductor capable of reducing the production cost by reducing the material cost by using the gap.
The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.
In the meantime, the expression "an example" used in this disclosure does not mean the same embodiment but is provided for emphasizing and explaining different unique features. However, the above-mentioned examples do not exclude that they are implemented in combination with the features of other examples. For example, although a matter described in a particular example is not described in another example, it may be understood as an explanation related to another example, unless otherwise stated or contradicted by that example in another example.
On the other hand, the terms used in this disclosure are used only to illustrate an example and are not intended to limit the present disclosure. Wherein the singular expressions include plural expressions unless the context clearly dictates otherwise.
100: inductor
1: magnetic body
2: external electrode
11: Coil
12: Air gap
Claims (10)
An external electrode disposed on an outer surface of the magnetic body; / RTI >
The magnetic body includes an air gap having a cavity therein,
Wherein the air gap is disposed on the same plane as the lower surface of the coil,
Inductor.
Wherein the magnetic body has a laminated structure in which a plurality of magnetic sheets are laminated,
Inductor.
Wherein at least part of the outer surface of the magnetic body is disposed on the outer surface on which the outer electrode is disposed,
Inductor.
Wherein the coil has a winding structure,
Inductor.
Wherein the air gap is disposed inside the innermost coil pattern of the coil,
Inductor.
The coefficient of thermal expansion of the magnetic sheet disposed above the air gap is different from the coefficient of thermal expansion of the magnetic sheet disposed below the air gap,
Inductor.
Wherein the air gap is not formed outside the outermost coil pattern of the coils,
Inductor.
Wherein at least two air gaps are formed,
Inductor.
Wherein the air gap is formed at a predetermined distance from the innermost coil pattern of the coils,
Inductor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160011575A KR101813359B1 (en) | 2016-01-29 | 2016-01-29 | Inductor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160011575A KR101813359B1 (en) | 2016-01-29 | 2016-01-29 | Inductor |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170090791A KR20170090791A (en) | 2017-08-08 |
KR101813359B1 true KR101813359B1 (en) | 2017-12-28 |
Family
ID=59653008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160011575A KR101813359B1 (en) | 2016-01-29 | 2016-01-29 | Inductor |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101813359B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108695040B (en) * | 2018-08-13 | 2021-10-08 | 西南应用磁学研究所 | LTCF device with air cavity and manufacturing method thereof |
-
2016
- 2016-01-29 KR KR1020160011575A patent/KR101813359B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
KR20170090791A (en) | 2017-08-08 |
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GRNT | Written decision to grant |