WO2022177349A1 - 자성코어 및 이를 포함하는 코일부품 - Google Patents
자성코어 및 이를 포함하는 코일부품 Download PDFInfo
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- WO2022177349A1 WO2022177349A1 PCT/KR2022/002426 KR2022002426W WO2022177349A1 WO 2022177349 A1 WO2022177349 A1 WO 2022177349A1 KR 2022002426 W KR2022002426 W KR 2022002426W WO 2022177349 A1 WO2022177349 A1 WO 2022177349A1
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- Prior art keywords
- magnetic core
- mass percentage
- present
- difference
- coil
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- 229910008423 Si—B Inorganic materials 0.000 claims description 26
- 239000011347 resin Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 23
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 description 41
- 230000000052 comparative effect Effects 0.000 description 21
- 230000035699 permeability Effects 0.000 description 16
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 15
- 238000001228 spectrum Methods 0.000 description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 6
- 235000019353 potassium silicate Nutrition 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 5
- 239000005995 Aluminium silicate Substances 0.000 description 4
- 235000012211 aluminium silicate Nutrition 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000003921 particle size analysis Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910002703 Al K Inorganic materials 0.000 description 2
- 229910002552 Fe K Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910002794 Si K Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001649 dickite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
Images
Classifications
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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
- 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
-
- 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
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
-
- 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
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15358—Making agglomerates therefrom, e.g. by pressing
- H01F1/15366—Making agglomerates therefrom, e.g. by pressing using a binder
- H01F1/15375—Making agglomerates therefrom, e.g. by pressing using a binder using polymers
-
- 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
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- 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
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F17/062—Toroidal core with turns of coil around it
Definitions
- the present invention relates to a magnetic core and a coil component.
- a large current step-down inductor for power factor correction (PFC), a high current step-up inductor, a three-phase line reactor, and the like used in a solar system, a wind power generation system, and an electric vehicle include a coil wound on a magnetic core.
- the magnetic core included in the high current inductor or high current reactor should improve the DC superposition characteristic at the high current, reduce the core loss at the high frequency, and obtain a stable magnetic permeability.
- the density of the magnetic core and the particle distribution in the magnetic core may affect the loss and permeability of the magnetic core.
- An object of the present invention is to provide a magnetic core and a coil component including the same.
- the magnetic core according to an embodiment of the present invention includes a material made of iron (Fe)-silicon (Si)-boron (B), and the mass percentage of Fe in the first surface, which is the upper surface, is in the second surface, which is the side surface. different from the mass percentage of Fe in the first surface, wherein the ratio of the mass percentage of Fe in the first surface to the difference between the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface is 6 or greater; less than 21.
- a ratio of the mass percentage of Fe in the first surface to the difference between the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface may be 11 or more and 21 or less.
- a mass percentage of Fe in the first surface may be greater than a mass percentage of Fe in the second surface.
- the porosity of the first surface may be different from the porosity of the second surface.
- An average aspect ratio of the Fe-Si-B material of the first surface may be different from an average aspect ratio of the Fe-Si-B material of the second surface.
- a mass percentage of the resin in the second surface may be higher than a mass percentage of the resin in the first surface
- the resin may include at least one of zinc (Zn), oxygen (O), aluminum (Al), and carbon (C).
- a mass percentage of zinc (Zn) and oxygen (O) in the second surface may be greater than a mass percentage of zinc (Zn) and oxygen (O) in the first surface.
- a difference between the mass percentage of Fe and the mass percentage of Si on the first surface may be different from a difference between the mass percentage of Fe and the mass percentage of Si on the second surface.
- a difference between the mass percentage of Fe and the mass percentage of Si on the first surface may be greater than a difference between the mass percentage of Fe and the mass percentage of Si on the second surface.
- the magnetic core may have a toroidal shape.
- the magnetic core according to another embodiment of the present invention includes a material made of iron (Fe)-silicon (Si)-boron (B), and the mass percentage of Fe in the first surface, which is the upper surface, is in the second surface, which is the side surface. different from the mass percentage of Fe in the second surface, wherein the ratio of the mass percentage of Fe in the second surface to the difference between the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface is 5 or more; less than 20
- a ratio of the mass percentage of Fe in the second surface to the difference between the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface may be 10 or more and 20 or less.
- a mass percentage of Fe in the first surface may be greater than a mass percentage of Fe in the second surface.
- a coil component according to an embodiment of the present invention includes a magnetic core and a coil wound on the magnetic core, wherein the magnetic core includes a material made of iron (Fe)-silicon (Si)-boron (B). And, the mass percentage of Fe in the first surface that is the upper surface is different from the mass percentage of Fe in the second surface that is the side surface, and the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface The ratio of the mass percentage of Fe in the first plane to the inter-interval difference is greater than or equal to 6 and less than or equal to 21.
- a magnetic core having low loss and high magnetic permeability can be obtained. According to this, the number of turns of the coil can be reduced, and the size of the coil component can be miniaturized. In addition, according to the embodiment of the present invention, it is possible to obtain a magnetic core capable of satisfying various needs according to application fields and required characteristics.
- the magnetic core and coil parts according to the embodiment of the present invention can be applied to vehicles and industries such as high current inductors and high current reactors.
- FIG. 1 is a perspective view of a magnetic core according to an embodiment of the present invention.
- FIG. 2 is a perspective view of a coil component according to an embodiment of the present invention.
- FIG 3 is an enlarged view of an upper surface and a side surface of a magnetic core according to an embodiment of the present invention.
- FIG. 4 (a) is an SEM photograph of the top surface of the magnetic core according to the comparative example
- FIG. 4 (b) shows the EDX analysis spectrum from the top surface of the magnetic core according to the comparative example.
- FIG. 5(a) is an SEM photograph from the side of the magnetic core according to the comparative example
- FIG. 5(b) shows the EDX analysis spectrum from the side of the magnetic core according to the comparative example.
- FIG. 6(a) is an SEM photograph from the top surface of the magnetic core according to the embodiment
- FIG. 6(b) shows the EDX analysis spectrum from the top surface of the magnetic core according to the embodiment.
- FIG. 7 (a) is an SEM photograph from the side of the magnetic core according to the embodiment, and FIG. 7 (b) shows the EDX analysis spectrum from the side of the magnetic core according to the embodiment.
- a component when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include the case of 'connected', 'coupled' or 'connected' due to another element between the other elements.
- FIG. 1 is a perspective view of a magnetic core according to an embodiment of the present invention
- FIG. 2 is a perspective view of a coil component according to an embodiment of the present invention
- FIG. 3 is an upper surface of the magnetic core according to an embodiment of the present invention and This is an enlarged view of the side.
- the coil component 100 includes a magnetic core 110 and a coil 120 wound on the magnetic core 110 .
- the magnetic core 110 may have a toroidal shape, and the coil 120 is wound to be symmetrical to the first coil 122 and the first coil 122 wound on the magnetic core 110 .
- a second coil 124 may be included.
- the first coil 122 and the second coil 124 may be wound on the upper surface S1, the outer circumferential surface S2, the lower surface S3, and the inner circumferential surface S4 of the toroidal-shaped magnetic core 110, respectively.
- a bobbin (not shown) for insulating the magnetic core 110 and the coil 120 may be further disposed between the magnetic core 110 and the coil 120 .
- the coil 120 may be formed of a conductive wire whose surface is coated with an insulating material.
- the conductive wire may be made of copper, silver, aluminum, gold, nickel, tin, etc. whose surface is coated with an insulating material, and the cross-section of the conductive wire may have a circular or prismatic shape.
- the coil component according to the embodiment of the present invention may be variously applied to, for example, an inductor, a choke coil, a transformer, a motor, a transformer for a DCDC converter, EMI shielding, a Power Factor Correction (PFC) inductor, etc., but is not limited thereto. , can be variously applied to vehicles and industries.
- an inductor for example, an inductor, a choke coil, a transformer, a motor, a transformer for a DCDC converter, EMI shielding, a Power Factor Correction (PFC) inductor, etc.
- PFC Power Factor Correction
- the magnetic core 110 includes a material 112 made of iron (Fe)-silicon (Si)-boron (B) as a main material.
- the magnetic core according to the embodiment of the present invention may include particles 112 made of Fe-Si-B as a main material, and the resin 114 may be filled in the voids between the particles made of Fe-Si-B. can At this time, the resin may serve as insulation, lubrication, and binder.
- the resin 114 may include at least one of kaolin, zinc stearate, and water glass.
- Kaolin is hydrous aluminum silicate, and the main component may be Al 2 Si 2 O 5 (OH) 4 , and may be used as an insulating agent.
- the main component of zinc stearate may be Zn(C 18 H 35 O 2 ) 2 , and may be used as a lubricant.
- Water glass is an aqueous solution of sodium silicate obtained by melting silicon dioxide and alkali.
- the main component is Na 2 SiO 3 , and it can be used as a binder.
- the particles 112 made of Fe-Si-B included in the magnetic core 110 according to an embodiment of the present invention may be crushed powder of an amorphous ribbon made of Fe-Si-B. Accordingly, the particles 112 made of Fe-Si-B may have a flake shape, and the magnetic core 110 may have a form in which flake-shaped particles 112 are stacked. In addition, the particles 112 made of Fe-Si-B included in the magnetic core 110 according to the embodiment of the present invention may have a particle size of 20 ⁇ m to 160 ⁇ m.
- the D50 of the particles may be 65 ⁇ m to 85 ⁇ m, preferably 70 ⁇ m to 80 ⁇ m, more preferably 72.5 ⁇ m to 77.5 ⁇ m, and the D10 of the particles is 25 ⁇ m to 45 ⁇ m, preferably 30 It may be ⁇ m to 40 ⁇ m, more preferably 32.5 ⁇ m to 37.5 ⁇ m, D90 of the particle may be 110 ⁇ m to 140 ⁇ m, preferably 120 ⁇ m to 135 ⁇ m, more preferably 125 ⁇ m to 130 ⁇ m.
- D10 means the particle size corresponding to 10% of the passing percentage in the particle size analysis data
- D50 means the particle size corresponding to 50% of the passing percentage in the particle size analysis data
- D90 is the particle size corresponding to 90% of the passing percentage in the particle size analysis data. corresponding particle size.
- D50 may also be used interchangeably with average particle size.
- the upper surface S1 of the magnetic core 110 and the side surface S2 of the magnetic core 110 will be described.
- the description of the upper surface S1 of the magnetic core 110 may be equally applied to the lower surface S3 of the magnetic core 110 .
- the description of the upper surface S1 of the magnetic core 110 may be equally applied to a cross section of the magnetic core 110 cut in a direction parallel to the upper surface S1 of the magnetic core 110 .
- the description of the side surface S2 of the magnetic core 110 may be equally applied to the inner peripheral surface S4 of the magnetic core 110 .
- the description of the side surface S2 of the magnetic core 110 may also be applied to a cross section in which the magnetic core 110 is cut in a direction perpendicular to the upper surface S1 of the magnetic core 110 .
- the particles 112 having a flake shape and made of Fe-Si-B are stacked in a direction parallel to the upper surface S1 or the lower surface S3 of the magnetic core 110, and Fe-Si
- the voids between the particles 112 made of -B may be filled with the resin 114 .
- the particle distribution shape of the upper surface S1 of the magnetic core 110 and the particle distribution shape and composition of the side surface S2 of the magnetic core 110 may be different from each other. That is, the upper surface of the particles 112 having a flake shape is mainly disposed on the upper surface S1 of the magnetic core 110, and the side surface of the particles 112 having the flake shape is mainly disposed on the side surface S2 of the magnetic core 110.
- the particle distribution shape may be expressed as a porosity or an average aspect ratio.
- the porosity of the side surface S2 of the magnetic core 110 may be greater than the porosity of the upper surface S1 of the magnetic core 110 .
- the porosity may mean a percentage of the total area excluding the area occupied by the particles 112 made of Fe-Si-B.
- the porosity of the side surface S2 of the magnetic core 110 is twice or more, preferably 2 times or more, and 2.5 times or less, more preferably 2.2 times the porosity of the upper surface S1 of the magnetic core 110 . It may be more than twice and less than or equal to 2.4 times.
- the average aspect ratio of the upper surface S1 of the magnetic core 110 may be different from the average aspect ratio of the side surface S2 of the magnetic core 110 .
- the aspect ratio may mean a ratio of the width to the length of the particle.
- the average aspect ratio of the upper surface S1 of the magnetic core 110 is 1.1:1 to 1.4:1, preferably 1.2:1 to 1.3:1, and the average of the side surface S2 of the magnetic core 110 is The aspect ratio may be from 4.2:1 to 5.2:1, preferably from 4.5:1 to 5:1, more preferably from 4.7:1 to 4.9:1.
- the average aspect ratio of the side surface S2 of the magnetic core 110 to the average aspect ratio of the top surface S1 of the magnetic core 110 is 3 times or more, preferably 3.5 times or more, and more preferably 3.75 times or more. may be more than Accordingly, the density in the magnetic core can be maximized, the porosity can be minimized, and accordingly, a magnetic core having low loss and high permeability performance can be obtained.
- the mass percentage of Fe in the upper surface S1 of the magnetic core 110 is different from the mass percentage of Fe in the side surface S2 of the magnetic core 110 .
- the mass percentage of Fe in the upper surface S1 of the magnetic core 110 may be greater than the mass percentage of Fe in the side surface S2 of the magnetic core 110 .
- the mass percentage of Fe in the upper surface S1 of the magnetic core 110 is 1.02 times or more of the mass percentage of Fe in the side surface S2 of the magnetic core 110, preferably 1.05 times to It may be 1.2 times, more preferably 1.1 times to 1.2 times.
- the difference between the mass percentage of Fe in the upper surface S1 of the magnetic core 110 and the mass percentage of Fe in the side S2 of the magnetic core 110 in the upper surface S1 of the magnetic core 110 The ratio of the mass percentages of Fe in ? may be 6 or more and 21 or less, preferably 11 or more and 21 or less.
- the ratio of the mass percentage of Fe in the side surface S2 of the magnetic core 110 for the difference between the mass percentage of Fe in the upper surface S1 of the magnetic core 110 and the mass percentage of Fe in the side surface S2 of the magnetic core 110 The ratio of the mass percentage of Fe in
- the mass percentage of the resin in the upper surface S1 of the magnetic core 110 is different from the mass percentage of the resin in the side surface S2 of the magnetic core 110 .
- the mass percentage of the resin in the side surface S2 of the magnetic core 110 may be greater than the mass percentage of the resin in the upper surface S1 of the magnetic core 110 .
- the resin 114 when the resin 114 includes at least one of kaolin, zinc stearate, and water glass, the resin 114 is zinc (Zn), oxygen (O), It may include at least one of aluminum (Al) and carbon (C), and zinc (Zn), oxygen (O), aluminum (Al) and carbon (C) in the side surface S2 of the magnetic core 110 .
- At least one mass percentage of at least one of zinc (Zn), oxygen (O), aluminum (Al), and carbon (C) in the upper surface S1 of the magnetic core 110 may be greater than a mass percentage of at least one of carbon (C).
- the mass percentage of zinc (Zn) and oxygen (O) in the side surface S2 of the magnetic core 110 is zinc (Zn) and oxygen ( O) may be greater than the mass percentage.
- the density in the magnetic core can be maximized, the porosity can be minimized, and accordingly, a magnetic core having low loss and high permeability performance can be obtained.
- silicon (Si) may not only be included in the particles 112 made of Fe-Si-B, but may also be included in the resin 114 filling the voids between the particles 112 made of Fe-Si-B. Accordingly, the difference between the mass percentage of Fe and the mass percentage of Si in the upper surface S1 of the magnetic core 110 is between the mass percentage of Fe and the mass percentage of Si in the side surface S2 of the magnetic core 110 . It may be different from tea. As described above, the mass percentage of Fe in the upper surface S1 of the magnetic core 110 may be greater than the mass percentage of Fe in the side surface S2 of the magnetic core 110 .
- the porosity of the side surface S2 of the magnetic core 110 may be greater than the porosity of the upper surface S1 of the magnetic core 110, and the voids between the particles 112 made of Fe-Si-B are resin 114. can be filled with Accordingly, the mass percentage of Si on the side surface S2 of the magnetic core 110 may be similar to the mass percentage of the upper surface S1 of the magnetic core 110 , and as a result, the side surface S2 of the magnetic core 110 . The difference between the mass percentage of Fe and the mass percentage of Si may be smaller than the difference between the mass percentage of Fe and the mass percentage of Si in the upper surface S1 of the magnetic core 110 .
- the density in the magnetic core can be maximized, the porosity can be minimized, and accordingly, a magnetic core having low loss and high permeability performance can be obtained.
- the magnetic core according to the comparative example is a crushed powder of an amorphous ribbon containing Fe-Si-B, D10 is 33.9 ⁇ m, D50 is 85.4 ⁇ m, and D90 is 152.5 ⁇ m.
- the magnetic core according to the embodiment is a crushed powder of an amorphous ribbon containing Fe-Si-B, D10 is 33.9 ⁇ m, D50 is 73
- the voids between the particles having a D90 of 127.4 ⁇ m were filled with a resin containing kaolin, zinc stearate and water glass, and were molded into a toroidal shape.
- EDX analysis was performed on one region on the upper surface of the magnetic core and two regions on the side surface of the magnetic core.
- Table 1 shows the mass percentage of the component according to the EDX analysis result on the upper surface and the side surface of the magnetic core according to the comparative example
- Table 2 shows the mass percentage of the component according to the EDX analysis result on the upper surface and the side surface of the magnetic core according to the Example
- Table 3 shows the porosity and aspect ratio on the upper surface and the side surface of the magnetic core according to the comparative example, and the porosity and the aspect ratio on the upper surface and the side surface of the magnetic core according to the embodiment.
- Figure 4 (a) is a scanning electron microscope (SEM) photograph from the top surface of the magnetic core according to the comparative example
- Figure 4 (b) shows the EDX analysis spectrum from the top surface of the magnetic core according to the comparative example
- Figure 5 (a) is a scanning electron microscope (SEM) photograph from the side of the magnetic core according to the comparative example
- FIG. 5 (b) shows the EDX analysis spectrum from the side of the magnetic core according to the comparative example
- FIG. It is an SEM photograph from the top surface of the magnetic core
- FIG. 6(b) is an EDX analysis spectrum from the top surface of the magnetic core according to the embodiment
- FIG. 7(a) is an SEM photograph from the side surface of the magnetic core according to the embodiment
- 7(b) shows the EDX analysis spectrum in terms of the magnetic core according to the embodiment.
- 4(b), 5(b), 6(b), and 7(b) are 250 ⁇ m in FIGS. 4(a), 5(a), 6(a) and 7(a), respectively. * Indicates the average value of the analysis results within the 250 ⁇ m region.
- the distribution shape of the particles made of Fe-Si-B on the upper surface of the magnetic core is Fe from the side of the magnetic core. It can be seen that the distribution shape of the particles made of -Si-B is different from that of the particles. That is, the porosity of the upper surface of the magnetic core and the porosity of the side surface of the magnetic core are different from each other, and the average aspect ratio of the particles made of Fe-Si-B on the upper surface of the magnetic core is the particle made of Fe-Si-B on the side of the magnetic core.
- the average aspect ratio of the upper surface S1 of the magnetic core 110 according to the embodiment is 1.1:1 to 1.4:1, and the aspect ratio of the side surface S2 of the magnetic core 110 according to the embodiment is 1.1:1 to 1.4:1. It can be seen that the average aspect ratio is within the range of 4.2:1 to 5.2:1. In addition, it can be seen that the average aspect ratio of the side surface S2 to the average aspect ratio of the upper surface S1 of the magnetic core 110 according to the embodiment is three times or more (4.85/1.24).
- the porosity of the side surface S2 of the magnetic core 110 is at least 2 times, preferably at least 2 times, and not more than 2.5 times, more preferably at least 2.2 times the porosity of the upper surface S1 of the magnetic core 110 . and 2.4 times or less (0.0010%/0.00043%).
- the composition of the upper surface of the magnetic core is different from the composition of the side surface of the magnetic core. That is, the mass percentage of Fe on the upper surface of the magnetic core may be 1.02 times or more, preferably 1.05 times to 1.2 times, more preferably 1.1 times to 1.2 times, the mass percentage of Fe on the side surface of the magnetic core.
- the mass percentage of Zn and O on the side surface is greater than the mass percentage of Zn and O on the top surface of the magnetic core, and the difference between the mass percentages of Fe and Si on the top surface of the magnetic core is greater than the difference between the mass percentages of Fe and Si on the side surface of the magnetic core.
- the particles made of Fe-Si-B in the magnetic core according to the embodiment of the present invention are stacked at a high density, and low loss and high permeability can be obtained from the magnetic core according to the embodiment of the present invention.
- the EDX analysis spectrum may be used. 4(b), 5(b), 6(b) and 7(b), it can be seen that the EDX analysis spectrum on the upper surface of the magnetic core is different from the EDX analysis spectrum on the side of the magnetic core. have. That is, it can be seen that the cps/eV of Fe on the upper surface of the magnetic core is different from the cps/eV of Fe on the side of the magnetic core.
- cps/eV is defined as the number of counts per second per eV, and may mean the number of X-rays emitted when a predetermined energy is applied, and components in the magnetic core can be analyzed using this.
- cps/eV of X-rays emitted at 6 to 6.8 keV means cps/eV of Fe(K), which may be different from the top and side surfaces of the magnetic core.
- cps/eV of X-rays emitted at 6 to 6.8keV that is, cps/eV of Fe(K) eV may appear differently in Comparative Examples and Examples.
- the cps/eV difference between Si and Fe(K) may be different in Comparative Examples and Examples.
- Table 4 is a table comparing the performance of the magnetic core according to the embodiment of the present invention and the magnetic core according to the comparative example.
- Example comparative example improvement rate Mold density (g/cc) 5.42 5.25 3% Loss (@65Hz, 50mT) 49.60 60.92 19% L O 44.53 35.60 25% L dc 31.71 29.50 8% initial permeability 55.56 43.10 29% Permeability (@100 Oe) 39.57 35.70 11%
- the magnetic core according to the embodiment has a higher density than the magnetic core according to the comparative example.
- the magnetic core according to the embodiment has a lower loss than the magnetic core according to the comparative example under the magnetic field conditions of 65 Hz and 50 mT.
- the initial inductance (LO ) and the inductance (L dc ) under the conditions of 15.6A which is an actual use current, also have an excellent effect in the Example as compared to the Comparative Example.
- the permeability (permeability @ 100 Oe) under the initial permeability and the actual use current also has an excellent effect in the example compared to the comparative example.
- a magnetic core capable of maintaining low loss, high magnetic permeability and high inductance can be obtained, and accordingly, coil components such as inductors and transformers can be miniaturized.
- the magnetic core according to an embodiment of the present invention may be applied to a large current step-down inductor for Power Factor Correction (PFC), a large current step-up inductor, a three-phase line reactor, etc. used in a solar system, a wind power generation system, an electric vehicle, and the like.
- PFC Power Factor Correction
- the magnetic core according to the embodiment of the present invention it is possible to increase the DC superposition characteristic at a large current, reduce the core loss at a high frequency, and obtain a stable magnetic permeability.
- the magnetic core has been described as an example of a toroidal shape in which the central part of the cylinder is empty, but is not limited thereto, and the edger embodiment of the present invention includes various types such as EER, ER, EE, EQ, PQ It can also be applied to shaped cores.
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Abstract
Description
원소 | 전자껍질 | 상면(wt%) | 측면(wt%) |
B | K | 4.06 | 2.93 |
C | K | 11.22 | 8.40 |
O | K | 15.85 | 17.64 |
Al | K | 0.97 | 0.95 |
Si | K | 7.50 | 7.77 |
Fe | K | 55.26 | 54.68 |
Zn | L | 5.15 | 7.61 |
총합(wt%) | 100 | 100 |
원소 | 전자껍질 | 상면(wt%) | 측면(wt%) |
B | K | 2.16 | 3.14 |
C | K | 7.52 | 7.87 |
O | K | 13.55 | 18.15 |
Al | K | 1.07 | 1.05 |
Si | K | 8.16 | 8.04 |
Fe | K | 62.34 | 54.26 |
Zn | L | 3.80 | 7.48 |
총합(wt%) | 100 | 100 |
실험번호 | 위치 | 공극률 | 종횡비 |
비교예 | 상면 | 0.00047% | 1.41:1 |
측면 | 0.0012% | 4.09:1 | |
실시예 | 상면 | 0.00043% | 1.24:1 |
측면 | 0.0010% | 4.85:1 |
실시예 | 비교예 | 개선율 | |
성형 밀도(g/cc) | 5.42 | 5.25 | 3% |
손실(@65Hz, 50mT) | 49.60 | 60.92 | 19% |
LO | 44.53 | 35.60 | 25% |
Ldc | 31.71 | 29.50 | 8% |
초기 투자율 | 55.56 | 43.10 | 29% |
투자율(@100 Oe) | 39.57 | 35.70 | 11% |
Claims (10)
- 철(Fe)-규소(Si)-붕소(B)로 이루어진 물질을 포함하고,상면인 제1면 내에서 Fe의 질량 백분율은 측면인 제2면 내에서 Fe의 질량 백분율과 상이하며,상기 제1면 내에서 Fe의 질량 백분율과 상기 제2 면 내에서 Fe의 질량 백분율 간 차에 대한 상기 제1면 내에서 Fe의 질량 백분율의 비는 6이상이고 21이하인 자성코어.
- 제1항에 있어서,상기 제1면 내에서 Fe의 질량 백분율과 상기 제2 면 내에서 Fe의 질량 백분율 간 차에 대한 상기 제1면 내에서 Fe의 질량 백분율의 비는 11 이상이고 21 이하인 자성코어.
- 제2항에 있어서,상기 제1면 내에서 Fe의 질량 백분율은 상기 제2면 내에서 Fe의 질량 백분율보다 큰 자성코어.
- 제2항에 있어서,상기 제1면의 공극률은 상기 제2면의 공극률과 상이한 자성코어.
- 제2항에 있어서,상기 제1면의 상기 Fe-Si-B로 이루어진 물질의 평균 종횡비는 상기 제2면의 상기 Fe-Si-B로 이루어진 물질의 평균 종횡비와 상이한 자성코어.
- 제2항에 있어서,상기 Fe-Si-B로 이루어진 물질 사이를 채우는 수지를 더 포함하고,상기 제2면에서 수지의 질량 백분율은 상기 제1면에서 수지의 질량 백분율보다 높은 자성코어.
- 제6항에 있어서,상기 수지는 아연(Zn), 산소(O), 알루미늄(Al) 및 탄소(C) 중 적어도 하나를 포함하는 자성코어.
- 제7항에 있어서,상기 제2면에서 상기 아연(Zn) 및 상기 산소(O)의 질량 백분율은 상기 제1 면에서 상기 아연(Zn) 및 상기 산소(O)의 질량 백분율보다 큰 자성코어.
- 제1항에 있어서,상기 제1면에서 Fe의 질량 백분율과 Si의 질량 백분율 간 차는 상기 제2면에서 Fe의 질량 백분율과 Si의 질량 백분율 간 차와 상이한 자성코어.
- 제9항에 있어서,상기 제1면에서 Fe의 질량 백분율과 Si의 질량 백분율 간 차는 상기 제2면에서 Fe의 질량 백분율과 Si의 질량 백분율 간 차보다 큰 자성코어.
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CN202280021899.8A CN116997980A (zh) | 2021-02-19 | 2022-02-18 | 磁芯以及包括磁芯的线圈部件 |
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Citations (5)
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JP2000345308A (ja) * | 1999-03-26 | 2000-12-12 | Alps Electric Co Ltd | 非晶質軟磁性合金焼結体及び非晶質軟磁性合金磁心及び非晶質軟磁性合金焼結体の製造方法 |
JP2015084353A (ja) * | 2013-10-25 | 2015-04-30 | 日立金属株式会社 | 圧粉磁心、その製造方法、該圧粉磁心を用いたインダクタンス素子および回転電機 |
KR20170133488A (ko) * | 2015-05-19 | 2017-12-05 | 알프스 덴키 가부시키가이샤 | 압분 코어, 당해 압분 코어의 제조 방법, 그 압분 코어를 구비하는 인덕터, 및 그 인덕터가 실장된 전자·전기 기기 |
KR20180071828A (ko) * | 2016-12-20 | 2018-06-28 | 엘지이노텍 주식회사 | 자성코어, 인덕터 및 이를 포함하는 emi 필터 |
KR20190093436A (ko) * | 2018-02-01 | 2019-08-09 | 엘지이노텍 주식회사 | 자성코어 조립체 및 이를 포함하는 코일부품 |
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- 2022-02-18 EP EP22756547.0A patent/EP4297054A1/en active Pending
- 2022-02-18 WO PCT/KR2022/002426 patent/WO2022177349A1/ko active Application Filing
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000345308A (ja) * | 1999-03-26 | 2000-12-12 | Alps Electric Co Ltd | 非晶質軟磁性合金焼結体及び非晶質軟磁性合金磁心及び非晶質軟磁性合金焼結体の製造方法 |
JP2015084353A (ja) * | 2013-10-25 | 2015-04-30 | 日立金属株式会社 | 圧粉磁心、その製造方法、該圧粉磁心を用いたインダクタンス素子および回転電機 |
KR20170133488A (ko) * | 2015-05-19 | 2017-12-05 | 알프스 덴키 가부시키가이샤 | 압분 코어, 당해 압분 코어의 제조 방법, 그 압분 코어를 구비하는 인덕터, 및 그 인덕터가 실장된 전자·전기 기기 |
KR20180071828A (ko) * | 2016-12-20 | 2018-06-28 | 엘지이노텍 주식회사 | 자성코어, 인덕터 및 이를 포함하는 emi 필터 |
KR20190093436A (ko) * | 2018-02-01 | 2019-08-09 | 엘지이노텍 주식회사 | 자성코어 조립체 및 이를 포함하는 코일부품 |
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