WO2022176053A1 - コイル部品 - Google Patents
コイル部品 Download PDFInfo
- Publication number
- WO2022176053A1 WO2022176053A1 PCT/JP2021/005880 JP2021005880W WO2022176053A1 WO 2022176053 A1 WO2022176053 A1 WO 2022176053A1 JP 2021005880 W JP2021005880 W JP 2021005880W WO 2022176053 A1 WO2022176053 A1 WO 2022176053A1
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- WO
- WIPO (PCT)
- Prior art keywords
- core
- coil component
- coil
- winding
- magnetic
- Prior art date
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- 238000004804 winding Methods 0.000 claims abstract description 42
- 230000035699 permeability Effects 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 239000006247 magnetic powder Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910017082 Fe-Si Inorganic materials 0.000 description 5
- 229910017133 Fe—Si Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
-
- 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
- H01F27/02—Casings
-
- 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
- H01F27/2823—Wires
-
- 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
- H01F27/2847—Sheets; Strips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
-
- 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
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
Definitions
- the present invention relates to a coil component, and more particularly to a coil component having a core configured by combining two types of core portions.
- Patent Document 1 discloses a coil component having a core configured by combining two types of core portions.
- This coil component consists of an open case, a powder core placed at the bottom of the case, a coil placed on the powder core, and a cast core filled and hardened in the case so as to cover the coil. have.
- Black rust on the core changes the characteristics of the coil parts. For example, black rust on the core increases eddy current losses in the core. In addition, the black rust generated on the core increases the AC resistance of the coil parts. The higher the drive frequency applied to the coil component, the greater the influence of such changes in characteristics due to black rust.
- FIG. 2 is a schematic cross-sectional view showing a modification of the coil component of FIG. 1;
- a coil component 10 includes a conductor 20 that generates magnetic flux when energized, and a core 30 that is provided around the conductor 20 and forms a magnetic path through which the magnetic flux circulates. , the conductor 20 and the core 30 are housed in a case 40 .
- the conductor 20 is a rectangular wire with a substantially rectangular cross section.
- the coil 200 is a flatwise coil in which a rectangular wire is wound in the thickness direction.
- a polyamide-imide wire (AIW) in which a copper wire is covered with an insulating coating can be used.
- the coil 200 may be further covered with an insulating coating (not shown) on its outer surface.
- the coil 200 has two cross sections when the coil component 10 is cut along a plane that includes the magnetic path and the axis of the coil 200 . Both of these two cross-sections form a winding window.
- the winding window refers to a cross section of the coil 200 around which a magnetic flux is formed in a plane containing the magnetic path and the axis of the coil 200 .
- the shape of each winding window is substantially rectangular. That is, each winding window has two vertically extending sides and two laterally extending sides.
- the number of winding windows is two.
- the number of winding windows depends on the number of coils 200 and their arrangement. For example, when two coils 200 having the same shape are vertically stacked with their axes aligned with each other, the cross sections of the plurality of coils 200 that are vertically close to each other form one winding window. In this case, the number of winding windows is two. Also, when two coils 200 having the same shape are arranged side by side so that their axes are parallel to each other, cross sections of the coils 200 adjacent to each other form one winding window. In this case, the number of winding windows is three.
- the core 30 has a first core 32 and a second core .
- the first core 32 is arranged below the coil 200 in the vertical direction and is in contact with the end surface 204 .
- the first core 32 exists only below the end surface 204 of the coil 200 and does not exist above the end surface 204 .
- the first core 32 is located on the opposite side of the winding window with respect to a straight line including one side in contact with the coil 200 on a plane including the magnetic path.
- An index related to the surface resistance of the first core 32 is the initial electrical resistivity of the first core 32 . If the initial electrical resistivity of the first core 32 is equal to or higher than the predetermined value, the characteristic change of the coil component 10 is suppressed even when the drive frequency is high.
- the initial electrical resistivity of the first core 32 is preferably 10 10 ⁇ cm or more. Since the initial electrical resistivity of the dust core using pure iron is about 10 9 ⁇ cm, the first core 32 has an initial electrical resistivity higher than that by about one order of magnitude or more. For example, the initial electrical resistivity of the dust core using the Fe—Si alloy described above is 10 12 ⁇ cm or more.
- the surface of the first core 32 may be covered with a coating material.
- the surface of the dust core using pure iron may be covered with a coating material to form the first core 32, or the surface of the dust core using Fe—Si alloy or the like may be covered with a coating material.
- a first core 32 may be formed.
- the gas permeability coefficient of the coating material is preferably 100 cc (STP) cm/(cm 2 ⁇ sec ⁇ cmHg) or less.
- epoxy resin or polyamide resin can be used.
- the effect of setting the surface resistance of the first core 32 to a predetermined value or more is remarkable when the component ratio of the coil 200 itself in the AC resistance Rac of the coil component 10 is small.
- the component ratio of the coil 200 itself in the AC resistance Rac of the coil component 10 is large, the effects of the present invention are limited. Therefore, it is desirable that the component ratio of the coil 200 itself in the AC resistance Rac of the coil component is small.
- the component ratio of the coil 200 itself in the AC resistance Rac of the coil component depends on the number of turns of the coil. That is, in the present embodiment, it is preferable that the number of turns of coil 200 is small. Specifically, the number of turns of coil 200 is preferably 30 or less.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Composite Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
通電によって磁束を発生させる導体と、
前記導体の周囲に設けられ、前記磁束が循環する磁路を形成するコアと、
前記導体及び前記コアを収容するケースと、
を有するコイル部品であって、
前記コイル部品の駆動周波数は、20kHz以上であり、
前記導体は、第1方向に沿った軸を有する一つ以上のコイルを構成している巻線であり、
前記導体は、前記磁路を含む平面において、四角形の巻窓を形成する断面を有し、
前記平面は、前記軸を含むものであり、
前記コイルは、前記平面において、前記巻窓を二つ以上形成するものであり、
前記巻窓は、前記第1方向に直交する第2方向に並んでおり、
前記コアは、第1透磁率を有する第1コアと、前記第1透磁率よりも低い第2透磁率を有する第2コアとを有し、
前記第1コアは、前記平面において、前記巻窓の夫々の第2方向へ延びる一辺全体に接し、前記巻窓のうちの少なくとも一つにおいて前記一辺の両端から前記第2方向へ突出し、かつ前記巻窓の夫々の前記一辺を含む直線に関して前記巻窓の反対側に位置しており、
前記第2コアは、前記平面において、前記巻窓の各々の前記一辺以外の三辺に接しており、
前記ケースは、底部と、前記底部から一方向へ延びる側部とを有しており、
前記第1コアは、前記底部と接しており、
前記第1コアは、圧粉コアであり、
前記圧粉コアの20mm離れた2点間における表面抵抗は、高温放置試験後において、5Ω以上であり、
駆動周波数は、20kHz以上である
コイル部品を提供する。
20 導体
22 端部
24 キャップ部材
200 コイル
202,204 端面
206 内周面
208 外周面
30 コア
32 第1コア(圧粉コア)
34 第2コア(注型コア)
40 ケース
42 底部
44 側部
46,46A 開口部
Claims (9)
- 通電によって磁束を発生させる導体と、
前記導体の周囲に設けられ、前記磁束が循環する磁路を形成するコアと、
前記導体及び前記コアを収容するケースと、
を有するコイル部品であって、
前記コイル部品の駆動周波数は、20kHz以上であり、
前記導体は、第1方向に沿った軸を有する一つ以上のコイルを構成している巻線であり、
前記導体は、前記磁路を含む平面において、四角形の巻窓を形成する断面を有し、
前記平面は、前記軸を含むものであり、
前記コイルは、前記平面において、前記巻窓を二つ以上形成するものであり、
前記巻窓は、前記第1方向に直交する第2方向に並んでおり、
前記コアは、第1透磁率を有する第1コアと、前記第1透磁率よりも低い第2透磁率を有する第2コアとを有し、
前記第1コアは、前記平面において、前記巻窓の夫々の第2方向へ延びる一辺全体に接し、前記巻窓のうちの少なくとも一つにおいて前記一辺の両端から前記第2方向へ突出し、かつ前記巻窓の夫々の前記一辺を含む直線に関して前記巻窓の反対側に位置しており、
前記第2コアは、前記平面において、前記巻窓の各々の前記一辺以外の三辺に接しており、
前記ケースは、底部と、前記底部から一方向へ延びる側部とを有しており、
前記第1コアは、前記底部と接しており、
前記第1コアは、圧粉コアであり、
前記圧粉コアの20mm離れた2点間における表面抵抗は、高温放置試験後において、5Ω以上である
コイル部品。 - 請求項1に記載のコイル部品であって、
前記圧粉コアに用いられる磁性粉の電気抵抗率は、20μΩcm以上である
コイル部品。 - 請求項1又は請求項2に記載のコイル部品であって、
前記圧粉コアの初期電気抵抗率は、1010μΩcm以上である
コイル部品。 - 請求項1から請求項3までのいずれか一つに記載のコイル部品であって、
前記コイルのインダクタンスに対する前記コイル部品のインダクタンスの比は、4以上である
コイル部品。 - 請求項1から請求項4までのいずれ一つに記載のコイル部品であって、
前記圧粉コアの表面は、コーティング材で覆われており、
前記コーティング材の気体透過係数は、100cc(STP)cm/(cm2・sec・cmHg)以下である
コイル部品。 - 請求項1から請求項5までのいずれか一つに記載のコイル部品であって、
前記コイルのターン数は、30ターン以下である
コイル部品。 - 請求項1から請求項6までのいずれか一つに記載のコイル部品であって、
前記コイルの数は、複数であり、
複数の前記コイルは互いに磁気結合している
コイル部品。 - 請求項1から請求項7までのいずれか一つに記載のコイル部品であって、
前記圧粉コアの20mm離れた2点間における表面抵抗は、前記高温放置試験後において、30Ω以上である
コイル部品。 - 請求項1から請求項8までのいずれか一つに記載のコイル部品であって、
前記高温放置試験は、200℃×500時間以上の加熱試験である
コイル部品。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/039,650 US20240096533A1 (en) | 2021-02-17 | 2021-02-17 | Coil component |
CN202180092929.XA CN116868288A (zh) | 2021-02-17 | 2021-02-17 | 线圈部件 |
PCT/JP2021/005880 WO2022176053A1 (ja) | 2021-02-17 | 2021-02-17 | コイル部品 |
JP2023500179A JPWO2022176053A1 (ja) | 2021-02-17 | 2021-02-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/005880 WO2022176053A1 (ja) | 2021-02-17 | 2021-02-17 | コイル部品 |
Publications (1)
Publication Number | Publication Date |
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WO2022176053A1 true WO2022176053A1 (ja) | 2022-08-25 |
Family
ID=82930316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2021/005880 WO2022176053A1 (ja) | 2021-02-17 | 2021-02-17 | コイル部品 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240096533A1 (ja) |
JP (1) | JPWO2022176053A1 (ja) |
CN (1) | CN116868288A (ja) |
WO (1) | WO2022176053A1 (ja) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004197218A (ja) * | 2002-11-22 | 2004-07-15 | Toko Inc | 複合磁性材料とそれを用いたコア及び磁性素子 |
JP2006339525A (ja) * | 2005-06-03 | 2006-12-14 | Alps Electric Co Ltd | コイル封入圧粉磁心 |
JP2007254814A (ja) * | 2006-03-23 | 2007-10-04 | Tdk Corp | Fe−Ni系軟磁性合金粉末、圧粉体、コイル封入圧粉磁芯 |
WO2010103709A1 (ja) * | 2009-03-09 | 2010-09-16 | パナソニック株式会社 | 圧粉磁芯およびそれを用いた磁性素子 |
JP2017143220A (ja) * | 2016-02-12 | 2017-08-17 | 株式会社トーキン | コイル部品 |
WO2018193745A1 (ja) * | 2017-04-19 | 2018-10-25 | アルプス電気株式会社 | 圧粉コア、圧粉コアの製造方法、インダクタ、および電子・電気機器 |
WO2021015206A1 (ja) * | 2019-07-25 | 2021-01-28 | Tdk株式会社 | 軟磁性粉末、磁心および電子部品 |
-
2021
- 2021-02-17 US US18/039,650 patent/US20240096533A1/en active Pending
- 2021-02-17 CN CN202180092929.XA patent/CN116868288A/zh active Pending
- 2021-02-17 JP JP2023500179A patent/JPWO2022176053A1/ja active Pending
- 2021-02-17 WO PCT/JP2021/005880 patent/WO2022176053A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004197218A (ja) * | 2002-11-22 | 2004-07-15 | Toko Inc | 複合磁性材料とそれを用いたコア及び磁性素子 |
JP2006339525A (ja) * | 2005-06-03 | 2006-12-14 | Alps Electric Co Ltd | コイル封入圧粉磁心 |
JP2007254814A (ja) * | 2006-03-23 | 2007-10-04 | Tdk Corp | Fe−Ni系軟磁性合金粉末、圧粉体、コイル封入圧粉磁芯 |
WO2010103709A1 (ja) * | 2009-03-09 | 2010-09-16 | パナソニック株式会社 | 圧粉磁芯およびそれを用いた磁性素子 |
JP2017143220A (ja) * | 2016-02-12 | 2017-08-17 | 株式会社トーキン | コイル部品 |
WO2018193745A1 (ja) * | 2017-04-19 | 2018-10-25 | アルプス電気株式会社 | 圧粉コア、圧粉コアの製造方法、インダクタ、および電子・電気機器 |
WO2021015206A1 (ja) * | 2019-07-25 | 2021-01-28 | Tdk株式会社 | 軟磁性粉末、磁心および電子部品 |
Also Published As
Publication number | Publication date |
---|---|
US20240096533A1 (en) | 2024-03-21 |
CN116868288A (zh) | 2023-10-10 |
JPWO2022176053A1 (ja) | 2022-08-25 |
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