WO2018226000A1 - 적층형 분말 코어 - Google Patents

적층형 분말 코어 Download PDF

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Publication number
WO2018226000A1
WO2018226000A1 PCT/KR2018/006360 KR2018006360W WO2018226000A1 WO 2018226000 A1 WO2018226000 A1 WO 2018226000A1 KR 2018006360 W KR2018006360 W KR 2018006360W WO 2018226000 A1 WO2018226000 A1 WO 2018226000A1
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WO
WIPO (PCT)
Prior art keywords
laminated
core
powder
laminated core
round
Prior art date
Application number
PCT/KR2018/006360
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
윤세중
김미래
이윤재
Original Assignee
주식회사 아모그린텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 아모그린텍 filed Critical 주식회사 아모그린텍
Priority to CN201880032763.0A priority Critical patent/CN110651338B/zh
Publication of WO2018226000A1 publication Critical patent/WO2018226000A1/ko

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    • 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
    • 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
    • H01F1/012—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials adapted for magnetic entropy change by magnetocaloric effect, e.g. used as magnetic refrigerating material
    • H01F1/015—Metals or alloys
    • 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
    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • 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

Definitions

  • the present invention relates to a magnetic core, and more particularly, to a laminated powder core capable of simultaneously satisfying customer requirements and a large capacity as well as improvement of magnetic properties when implementing core stacking.
  • the powder core is manufactured by filling a mold with magnetic powder and then pressing to shape the powder.
  • Such powder cores are wound around a central hole and an outer circumferential surface along the circumference for use as an inductor or noise filter.
  • the outer peripheral surface along the circumference of the powder core or the corner formed by the inner surface and both sides of the central hole is formed at almost right angles, so that the coating of the coil wound around the powder core is often scratched off by the edge of the powder core.
  • the powder core is filled with a magnetic powder in a mold and pressure-molded, it is difficult to manufacture a product having a predetermined thickness or more in the structure of the mold, there is a limit in the implementation of uniform characteristics due to the density deviation caused by pressure unevenness.
  • the present invention has been made in view of the above points, and minimizes the volume loss when the core is laminated, thereby providing a laminated powder core capable of satisfying the requirements and capacity of the customer as well as improving the magnetic properties. There is this.
  • the present invention provides a laminated powder core comprising at least two laminated cores press-molded with a magnetic powder material.
  • the laminated powder core may include a first laminated core having a round part having a predetermined curvature at an edge of one surface thereof; And a second laminated core having a round portion having a predetermined curvature at an edge of one surface thereof, wherein the other surfaces of the first laminated core and the second laminated core are not provided with round portions, and the other surfaces are stacked to face each other.
  • the first laminated core and the second laminated core have the same thickness, and the round portion has a curvature that satisfies a total volume reduction rate of 0.4 to 8% of the first laminated core and the second laminated core by the round portion.
  • the laminated powder core may further include at least one third laminated core disposed between the first laminated core and the second laminated core and not provided with round portions on both sides. have.
  • the magnetic powder material may include at least one of amorphous alloy powder, ferrite, and metal-based alloy powder.
  • the ferrite may be MnZn ferrite or NiZn ferrite.
  • first laminated core and the second laminated core may include an epoxy coating layer.
  • the laminated core may be manufactured by a mold.
  • the round part may be formed by post-processing of the laminated core.
  • the present invention by providing a round only in the outer periphery of the laminated core, by omitting the round in the laminated surface between the core, to minimize the volume loss of the entire core by the round, to satisfy the requirements of the customer for the winding of the coil At the same time, it is possible to suppress the deterioration of the characteristics due to volume loss, thereby improving the overall magnetic characteristics.
  • the present invention can achieve a large capacity by overcoming the limitation of the mold production and the limitation of the thickness increase of the powder core due to the pressure imbalance on the unit area by laminating a plurality of powder cores.
  • FIG. 1 is a perspective view showing a laminated powder core according to an embodiment of the present invention.
  • FIG. 1 is an exploded perspective view of FIG. 1;
  • FIG. 3 is an enlarged cross-sectional view of a portion A of FIG.
  • FIG. 4 is an enlarged cross-sectional view of the inner side of the laminated powder core central hole of FIG. 1;
  • FIG. 5 is a perspective view showing a laminated powder core according to another embodiment of the present invention.
  • FIG. 6 is an exploded perspective view of FIG. 5;
  • FIG. 7 is an enlarged cross-sectional view of a portion B of FIG. 5;
  • FIG. 8 is an enlarged cross-sectional view of the inner side of the laminated powder core central hole of FIG. 5, and
  • FIG. 9 is a perspective view showing an example of a mold for manufacturing a laminated powder core according to an embodiment of the present invention.
  • the laminated powder core 100 includes at least two or more laminated cores 110 and 120, as shown in FIGS. 1 and 2.
  • the multilayer powder core 100 coils are wound around the central holes 116 and 126 and the outer circumferential surface along the circumference, and thus may be used as a noise filter or an inductor.
  • the laminated powder core 100 is press-molded with a magnetic powder material, has an overall cylindrical shape, and has holes 116 and 126 at the center thereof.
  • the laminated powder core 100 is a powder core made of a constant thickness (t) because the thickness (t) that can be produced according to the pressure imbalance of the upper or lower portion of the mold when the magnetic powder is filled in the mold and pressure molding It is laminated
  • the first laminated core 110 is provided with a round portion having a predetermined curvature at the corner of the first surface 112.
  • the first laminated core 110 may be disposed above the laminated powder core 100.
  • the first surface 112 is a surface on which the coil is wound and is the outermost surface of the laminated powder core 100, and may be an upper surface of the first laminated core 110.
  • the round part is provided at a corner where the inner surface of the central hole 116 and the first surface 112 are in contact, and at the corner where the outer circumferential surface and the first surface 112 of the first laminated core 110 are in contact with each other. That is, the first laminated core 110 may be provided with the round portion at the outer periphery of the first surface 112 and the inner periphery by the central hole 116.
  • the first laminated core 110 is not provided with a round portion having a predetermined curvature on the second surface 114 facing the first surface 112. That is, the second surface 114 of the first laminated core 110 may be formed as a flat surface (see FIG. 2).
  • the second surface 114 is a surface on which the coil is not wound, and may be a surface facing the second laminated core 120. Therefore, the second surface 114 is a surface which is not exposed to the outside from the laminated powder core 100, and may be a lower surface of the stacked powder core 100.
  • the second laminated core 120 is provided with a round portion having a predetermined curvature at the corner of the first surface 122.
  • the laminated powder core 100 may be disposed below the laminated powder core 100.
  • the first surface 122 is a surface on which the coil is wound, and is the outermost surface of the laminated powder core 100, and may be a lower surface of the second laminated core 120.
  • the round part is provided at a corner where the inner surface of the central hole 126 and the first surface 122 contact each other, and a corner where the outer circumferential surface of the second laminated core 120 and the first surface 122 contact each other. That is, the second laminated core 120 may be provided with the round portion at the outer periphery of the first surface 122 and the inner periphery by the central hole 126.
  • the second laminated core 120 is not provided with a round portion having a predetermined curvature on the second surface 124 opposite to the first surface 122. That is, the second surface 124 of the second laminated core 120 may be formed as a flat surface (see FIG. 2).
  • the second surface 124 is a surface on which the coil is not wound, and may be a surface opposite to the first laminated core 110. Therefore, the second surface 124 may not be exposed to the outside from the laminated powder core 100. As a non-surface, it may be an upper surface of the laminated powder core 100.
  • first stacked cores 110 and the second stacked cores 120 may be stacked such that the second surfaces 114 and 124 having no rounded portions face each other.
  • a large capacity of the powder core can be achieved by solving a manufacturing problem in which the thickness of the powder core is limited due to the pressure imbalance on the unit area during the production of the powder core by the mold.
  • first laminated core 110 and the second laminated core 120 may have different thicknesses t, but may have the same thickness t for efficiency of the manufacturing process. That is, since the first laminated core 110 and the second laminated core 120 are manufactured to have the same thickness t, both of them may be manufactured by the same process, thereby improving efficiency of the manufacturing process.
  • a round portion having a predetermined curvature is provided on the first surface 112 of the first laminated core 110 and the first surface 122 of the second laminated core 120 corresponding to both surfaces of the stacked powder core 100.
  • the round part should be provided with a curvature within a predetermined range.
  • a total volume reduction rate of the first laminated core 110 and the second laminated core 120 by the round part satisfies 0.4 to 8%.
  • the round portion is provided to have a curvature.
  • the total volume reduction rate of the first laminated core 110 and the second laminated core 120 is the sum of the volume reduction rates by the round portion in each of the laminated cores 110 and 120, and the total volume of the laminated powder core 100. It means reduction rate.
  • the volume reduction rate of the laminated powder core 100 exceeds 8%, the volume reduction rate due to the round portion is too large, so that the magnetic properties are lowered.
  • the laminated powder core 100 is used as an inductor, the inductance and the DC overlapping characteristics are lowered, thereby reducing the efficiency.
  • the volume loss of the laminated powder core 100 by the round portion may be minimized.
  • the round provided on the first surface 112 of the first laminated core 110 is achieved by the sum of the volume lost by the round and the round portion provided on the first surface 122 of the second laminated core 120.
  • the rounded portion provided on the first surface 112 of the first laminated core 110 is the same as the rounded portion provided on the second surface 114, and the first surface 122 of the second laminated core 120 is provided.
  • the round part provided on the second surface 124 is the same as the round part provided on the second surface 124, and thus, the second surface 114 and the second laminated core 120 of the first laminated core 110 without the rounded part may be formed.
  • the sum of the volumes of the regions b is equal to the volume of the laminated powder core 100 lost by the round portion (see FIGS. 3 and 4).
  • the volume loss is compensated by the corresponding volume a + b, thereby stacking. Magnetic properties of the powder core 100 may be improved.
  • the laminated powder core 100 may be provided with a rounded portion having a larger curvature compared to a constant magnetic property, it can more easily satisfy the requirements of the customer company.
  • the first laminated core 110 and the second laminated core 120 may be manufactured by pressing by a mold with a magnetic powder material.
  • the magnetic powder material may include at least one of amorphous alloy powder, ferrite, and metal alloy powder.
  • the ferrite may be MnZn ferrite or NiZn ferrite.
  • the present invention is not limited thereto, and the stacked powder core 100 may be compression molded from any magnetic material in powder form.
  • the first laminated core 110 and the second laminated core 120 insert the magnetic powder material into the receiving portion 16 of the mold 10, cover the lid 12, and then press molding by external pressure. (See FIG. 9).
  • the laminated core formed by the mold 10 may be formed on both surfaces thereof as a flat surface as shown in the third laminated core 230 shown in FIG. 9. Therefore, the first laminated core 110 and the second laminated core 120 may be provided with the round part by post-processing after being press-molded by the mold 10. That is, the round part may be formed by post-processing such as polishing after pressing the first laminated core 110 and the second laminated core 120 by a mold.
  • the round part can be formed with the various curvature also about the laminated powder core 100 which has the same thickness t and the outer diameter (phi), it can change a post process only and can respond quickly to the request of a customer company.
  • first laminated core 110 and the second laminated core 120 may be provided with an epoxy coating layer.
  • the surface of the first laminated core 110 and the second laminated core 120 is protected, and the surface resistance is increased to improve insulation with the coil, and the first laminated core 110 and the second laminated core ( Departure of the magnetic powder constituting the 120) can be suppressed.
  • the laminated powder core 100 may be provided with an adhesive layer between the first laminated core 110 and the second laminated core 120.
  • the present invention is not limited thereto, and the first laminated core 110 and the second laminated core 120 may be fixed by winding coils, and thus may be laminated and fixed without using a separate adhesive layer.
  • the laminated powder core according to an embodiment of the present invention may be composed of three or more laminated cores.
  • the stacked powder core 200 further includes at least one third stacked core 230 disposed between the first stacked core 110 and the second stacked core 120, as shown in FIG. 5. can do.
  • both surfaces of the first surface 232 of the third stacked core 130 may be formed as a flat surface (see FIG. 6).
  • the first surface 232 and the second surface 234 of the third laminated core 230 are surfaces on which the coil is not wound.
  • the first surface 232 is a top surface of the third stacked core 230, and faces the first stacked core 110
  • the second surface 234 is a bottom surface of the third stacked core 230.
  • it may be a surface corresponding to the second laminated core 120.
  • all of the first stacked core 110, the second stacked core 120, and the third stacked core 230 may have the same thickness t for the efficiency of the manufacturing process. That is, since the first laminated core 110, the second laminated core 120, and the third laminated core 230 are manufactured to have the same thickness t, all of them may be manufactured by the same process, thereby improving efficiency of the manufacturing process. Can be improved.
  • the compensation for the substantial volume loss of the laminated powder core 200 is a round provided on the first surface 112 of the first laminated core 110. Compensated by twice the sum of the volume lost by the round part provided in the wealth and the first surface 122 of the second laminated core 120.
  • the first surface 232 and the second surface 234 of the third laminated core 230 and the second surface 114 or the second laminated core 120 of the first laminated core 110 which are not provided with the round portion.
  • the regions a and b between the first stacked core 110 and the third stacked core 230 and the regions a 'and b' between the second stacked core 120 and the third stacked core 230. ) Have the same volume, and each region has a volume lost by the round part.
  • the volume loss is compensated by a multiple of the corresponding volume a + b. It is possible to further improve the magnetic properties, and can be provided with a round portion having a larger curvature compared to the constant magnetic properties, it is possible to more easily meet the requirements of the customer.
  • the third laminated core 230 is manufactured by the mold 10 because the round portions are not provided on both sides, and post-processing for forming rounds may be omitted.
  • the laminated powder core 200 includes at least three laminated cores, only the first laminated core 110 and the second laminated core 120 disposed at the outermost portion of the laminated powder core 200 have round portions. Since the post-processing to be provided, it is possible to improve the efficiency of the manufacturing process, and to quickly cope with the needs of customers due to the large capacity of the magnetic properties.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Powder Metallurgy (AREA)
  • Soft Magnetic Materials (AREA)
PCT/KR2018/006360 2017-06-08 2018-06-04 적층형 분말 코어 WO2018226000A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880032763.0A CN110651338B (zh) 2017-06-08 2018-06-04 层叠型粉芯

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170071608A KR102009780B1 (ko) 2017-06-08 2017-06-08 적층형 분말 코어
KR10-2017-0071608 2017-06-08

Publications (1)

Publication Number Publication Date
WO2018226000A1 true WO2018226000A1 (ko) 2018-12-13

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WO (1) WO2018226000A1 (zh)

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KR102612087B1 (ko) * 2021-11-03 2023-12-11 (주)창성 저압인서트 사출을 이용한 자성코어의 봉지방법과 이를 이용하여 봉지한 자성코어

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100082741A (ko) * 2009-08-04 2010-07-19 부전전자 주식회사 인덕터 모듈
JP2011199100A (ja) * 2010-03-23 2011-10-06 Tdk Corp 積層型電子部品及びその製造方法
US20130113592A1 (en) * 2008-07-29 2013-05-09 Cooper Technologies Company Magnetic electrical device
KR101554713B1 (ko) * 2014-05-19 2015-09-21 크로바하이텍(주) 복수 개의 캡 구조들을 가지는 인덕터
JP2016225590A (ja) * 2015-05-28 2016-12-28 Ntn株式会社 限流回路用インダクタ

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JP3368798B2 (ja) * 1997-05-14 2003-01-20 トヨタ自動車株式会社 モータのステータ
CN202905391U (zh) * 2012-09-26 2013-04-24 艾默生网络能源有限公司 一种共模电感
JP6262504B2 (ja) 2013-11-28 2018-01-17 アルプス電気株式会社 軟磁性粉末を用いた圧粉コアおよび該圧粉コアの製造方法
CN204303521U (zh) * 2014-07-15 2015-04-29 青岛菲尔泰科电子有限公司 一种新型单相共模扼流圈
CN106229104A (zh) * 2016-08-31 2016-12-14 北京康普锡威科技有限公司 一种软磁复合粉末及其磁粉芯制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130113592A1 (en) * 2008-07-29 2013-05-09 Cooper Technologies Company Magnetic electrical device
KR20100082741A (ko) * 2009-08-04 2010-07-19 부전전자 주식회사 인덕터 모듈
JP2011199100A (ja) * 2010-03-23 2011-10-06 Tdk Corp 積層型電子部品及びその製造方法
KR101554713B1 (ko) * 2014-05-19 2015-09-21 크로바하이텍(주) 복수 개의 캡 구조들을 가지는 인덕터
JP2016225590A (ja) * 2015-05-28 2016-12-28 Ntn株式会社 限流回路用インダクタ

Also Published As

Publication number Publication date
KR102009780B1 (ko) 2019-08-12
KR20180134126A (ko) 2018-12-18
CN110651338B (zh) 2021-07-20
CN110651338A (zh) 2020-01-03

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