US3408573A - Coil core manufactured from softmagnetic and permanent-magnetic materials - Google Patents
Coil core manufactured from softmagnetic and permanent-magnetic materials Download PDFInfo
- Publication number
- US3408573A US3408573A US556144A US55614466A US3408573A US 3408573 A US3408573 A US 3408573A US 556144 A US556144 A US 556144A US 55614466 A US55614466 A US 55614466A US 3408573 A US3408573 A US 3408573A
- Authority
- US
- United States
- Prior art keywords
- magnetic
- permanent
- soft
- coil core
- coil
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000000696 magnetic material Substances 0.000 title claims description 25
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 230000005415 magnetization Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005291 magnetic effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- HPYIMVBXZPJVBV-UHFFFAOYSA-N barium(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Ba+2] HPYIMVBXZPJVBV-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 1
- 241000656145 Thyrsites atun Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- SVMGVNXXUVNGRK-UHFFFAOYSA-N oxomethylideneiron Chemical compound O=C=[Fe] SVMGVNXXUVNGRK-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic 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
- H01F17/04—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
- 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
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
Definitions
- the invention relates to a coil core manufactured from soft-magnetic and permanent-magnetic materials in which the permanent magnetic material serves for bias magnetization of the soft-magnetic material.
- a coil core which consists of several layers of ferrite material in which the material of one of the layers has permanent magnetic properties so that therewith the remaining (soft-magnetic) part of the coil core can be biased.
- the manufacture of sintered cores built up from layers of different materials meets serious objections due to the different coefficients of thermal exicated shapes of the core cannot be manufactured or are difiicult to manufacture according to this known method.
- said core consists of a mixture of soft-magnetic and permanent-magnetic materials in powder form homogeneously distributed in a solid binder, preferably rubber or a synthetic material.
- soft-magnetic and permanent-magnetic materials in powder form are thoroughly mixed together with a are then formed into a body by moulding, injection moulding or rolling, the binder being then hardened. In this manner it is possible to manufacture coil cores of a complicated shape in a simple manner.
- the coil cores are preferably constructed as solid coil formers. According to another embodiment of the invention, the coil cores are constructed as bodies moulded or injection-moulded close around the coil Winding.
- the softmagnetic material can be better subjected to bias magnetisation than is the case in the known coil cores built up from layers of soft-magnetic and permanent-magnetic material.
- a DC. magnetic field is applied while the permanent magnetic particles can move freely to a certain extent with respect to one another so that the permanentmagnetic particles are directed parallel to said D.C. magnetic field with their easy axis of magnetisation, the particles of the permanent-magnetic material'in the core after solidification of the binder are fixed in a magnetically oriented condition.
- soft-magnetic and permanent-magnetic materials are preferably chosen ferrites, for example, soft-magnetic manganese-zinc ferrite or nickel-zinc ferrite and permanent-magnetic bariumhexaferrite and/or strontiumhexaferrite respectively.
- Other soft-magnetic material may also be used, such as, carbonyl iron or iron powder.
- permanent-magnetic materials are further to be considered the known permanent-magnetic steel alloys or manganesebismuth alloys.
- the quantity of soft-magnetic material in the coil cores according to the invention preferably is at least 50% by weight, in particular approximately 70-80% by weight, of the total quantity of ferromagnetic material present in 3,408,573 Patented Oct. 29, 1968 It is to be noted that flexible bodies consisting of either only a softmagnetic material or only a permanent-magup from a permanent-magnetic and a soft-magnetic layer each consisting of a magnetic powder with a binder.
- the invention relates to a ferro-magnetic coil core having a high magnetic permeability and an operating point which, by
- the permanent-magnetic material for example, barium-hexaferrite, produces a bias magnetisation of the soft magnetic material (which consists, for example, of manganese-zinc ferrite).
- This coil construction consequently control for television receivers and is distinguished from the known linearity controls by its simplicity; in fact it consists of only two parts, the coil core 1 and the winding 2.
- another soft-magnetic core 4 preferably likewise consisting of manganese-zinc ferrite, is movably arranged in the cavity 5 of the coil core 1.
- a coil core manufactured from soft-magnetic and permanent-magnetic materials in which the permanentmembers 9 projecting beyond the core magnetic material serves for bias magnetization of the soft-magnetic material characterized in that the coil core consists of a mixture of soft-magnetic and permanentmagnetic materials in powder form homogeneously distributed in a solid plastic binder.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Composite Materials (AREA)
- Soft Magnetic Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP0037088 | 1965-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3408573A true US3408573A (en) | 1968-10-29 |
Family
ID=7375101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US556144A Expired - Lifetime US3408573A (en) | 1965-06-19 | 1966-06-08 | Coil core manufactured from softmagnetic and permanent-magnetic materials |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3408573A (enrdf_load_html_response) |
| NL (1) | NL6608192A (enrdf_load_html_response) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3541369A (en) * | 1968-03-15 | 1970-11-17 | Nippon Musical Instruments Mfg | Speed detecting apparatus for a rotatable loud-speaker |
| US3553508A (en) * | 1964-09-30 | 1971-01-05 | Rech En Matiere De Micro Moteu | Electric motor with a plurality of radially arranged bridge-type magnetic circuits |
| US5210493A (en) * | 1992-02-27 | 1993-05-11 | General Motors Corporation | Method for embedding wires within a powder metal core and sensor assembly produced by such a method |
| US20070222306A1 (en) * | 2004-05-11 | 2007-09-27 | Hoganas Ab | Electrical Machine and Method for Producing an Electrical Machine |
| WO2007141489A3 (en) * | 2006-06-02 | 2008-01-31 | Nexxtdrive Ltd | Magnetic core of an electric machine having anisotropic material embedded in isotropic material |
| US20090058413A1 (en) * | 2006-02-23 | 2009-03-05 | Nxp B.V. | Magnetoresistive sensor device and method of fabricating such magnetoresistive sensor device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452531A (en) * | 1943-05-31 | 1948-10-26 | Hartford Nat Bank & Trust Co | Process of manufacturing a magnetic material and magnetic core |
| US3257586A (en) * | 1960-03-03 | 1966-06-21 | Magnetfabrik Bonn Gewerkschaft | Flexible permanent magnet and composition |
-
1966
- 1966-06-08 US US556144A patent/US3408573A/en not_active Expired - Lifetime
- 1966-06-14 NL NL6608192A patent/NL6608192A/xx unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452531A (en) * | 1943-05-31 | 1948-10-26 | Hartford Nat Bank & Trust Co | Process of manufacturing a magnetic material and magnetic core |
| US3257586A (en) * | 1960-03-03 | 1966-06-21 | Magnetfabrik Bonn Gewerkschaft | Flexible permanent magnet and composition |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3553508A (en) * | 1964-09-30 | 1971-01-05 | Rech En Matiere De Micro Moteu | Electric motor with a plurality of radially arranged bridge-type magnetic circuits |
| US3541369A (en) * | 1968-03-15 | 1970-11-17 | Nippon Musical Instruments Mfg | Speed detecting apparatus for a rotatable loud-speaker |
| US5210493A (en) * | 1992-02-27 | 1993-05-11 | General Motors Corporation | Method for embedding wires within a powder metal core and sensor assembly produced by such a method |
| US5315245A (en) * | 1992-02-27 | 1994-05-24 | General Motors Corporation | Sensor assembly having embedded wires within a powder metal core and a method therefor |
| US20070222306A1 (en) * | 2004-05-11 | 2007-09-27 | Hoganas Ab | Electrical Machine and Method for Producing an Electrical Machine |
| US8110959B2 (en) | 2004-05-11 | 2012-02-07 | Höganäs Ab | Method for producing an electrical machine with a body of soft magnetic material |
| US20090058413A1 (en) * | 2006-02-23 | 2009-03-05 | Nxp B.V. | Magnetoresistive sensor device and method of fabricating such magnetoresistive sensor device |
| US9304175B2 (en) * | 2006-02-23 | 2016-04-05 | Nxp B.V. | Magnetoresistive sensor device and method of fabricating such magnetoresistive sensor device |
| WO2007141489A3 (en) * | 2006-06-02 | 2008-01-31 | Nexxtdrive Ltd | Magnetic core of an electric machine having anisotropic material embedded in isotropic material |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6608192A (enrdf_load_html_response) | 1966-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10204725B2 (en) | Composite magnetic core and magnetic element | |
| KR101204873B1 (ko) | 자성 코어부품의 제조방법 | |
| JP2002057039A (ja) | 複合磁芯 | |
| US2985939A (en) | Process of making a ferromagnetic core having a predetermined permeability | |
| US4441875A (en) | Mold apparatus for forming article under influence of magnetic field | |
| KR100483739B1 (ko) | 페라이트산화물 자성재료 | |
| US3408573A (en) | Coil core manufactured from softmagnetic and permanent-magnetic materials | |
| JP2000182845A (ja) | 複合磁心 | |
| JPH05299232A (ja) | 樹脂成形磁性材 | |
| JPH05283238A (ja) | トランス | |
| JP2000294429A (ja) | 複合磁芯 | |
| JP2015185776A (ja) | 磁性コア部品および磁性素子、ならびに磁性コア部品の製造方法 | |
| JP4291566B2 (ja) | 複合コア | |
| US3829806A (en) | Sintered ferromagnetic core having accurately adjusted dimensions | |
| JP2020174127A (ja) | インダクタ素子 | |
| JP2004158570A (ja) | チョークコイル及びその製造方法 | |
| JPH05326240A (ja) | 圧粉磁芯及びその製造方法 | |
| JPH0613243A (ja) | コア構体 | |
| JPS55154721A (en) | Annular permanent magnet and manufacture thereof | |
| JPH0636937A (ja) | インダクタ及びその製造方法 | |
| JPH0512994Y2 (enrdf_load_html_response) | ||
| JPH0684648A (ja) | インダクタンス素子及びその製造方法 | |
| JP2696834B2 (ja) | 酸化物磁性材料 | |
| JPS5916251A (ja) | 偏向ヨ−クコアの製造方法 | |
| JP6676405B2 (ja) | 磁性素子 |