EP0542200B1 - Verwendung eines magnetischen Materials als Spulenkern - Google Patents
Verwendung eines magnetischen Materials als Spulenkern Download PDFInfo
- Publication number
- EP0542200B1 EP0542200B1 EP92119218A EP92119218A EP0542200B1 EP 0542200 B1 EP0542200 B1 EP 0542200B1 EP 92119218 A EP92119218 A EP 92119218A EP 92119218 A EP92119218 A EP 92119218A EP 0542200 B1 EP0542200 B1 EP 0542200B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferrite
- employed
- use according
- weight
- epoxy resin
- 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 13
- 230000035699 permeability Effects 0.000 claims description 18
- 229910000859 α-Fe Inorganic materials 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 229910001308 Zinc ferrite Inorganic materials 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 7
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- SVMGVNXXUVNGRK-UHFFFAOYSA-N oxomethylideneiron Chemical compound O=C=[Fe] SVMGVNXXUVNGRK-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- H01F1/34—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 non-metallic substances, e.g. ferrites
- H01F1/36—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 non-metallic substances, e.g. ferrites in the form of particles
- H01F1/37—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 non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
Definitions
- the present invention relates to the use of a magnetic material for coil cores after the preamble of claim 1.
- inductive components in the presence high external magnetic fields is the use of Coils as inductance in resonant circuits of inductive proximity switches, those in the automotive industry in welding machines be used.
- High magnetic fields occur on which the permeability of the magnetic core cer coil in the inductive Reduce proximity switches so that their inductance and thus changes the quality of an oscillator whose frequency-determining circuit the coil as an inductive component contains. Therefore, there may be undesirable switching operations of the inductive Proximity switch come.
- carbonyl iron In addition to the advantage of an almost constant permeability carbonyl iron still has high magnetic fields but the disadvantage of a relatively low initial permeability, which results in an application in inductive proximity switches result in correspondingly short switching distances. Furthermore, the production of carbonyl iron from chemical Relatively complex reasons, since pure iron chemically in a carbonyl compound must be included. Finally also results from mechanical reworking of coil cores made of carbonyl iron, for example by grinding, the disadvantage that the advantage of a high electrical resistance and associated low electrical losses is lost because the material is machined becomes electrically conductive.
- the present invention has for its object a using a magnetic material for a coil core specify that with easy processability in the area of high Magnetic fields can be used and not only a constant permeability, but also a constant maintains high resistivity, resulting in low Core losses and thus a high quality of this core material containing coil are guaranteed.
- the magnetic material used by a homogeneous Ferrite / plastic composition with a mixing ratio is formed, the maximum to be expected from the parameters External field strength and minimum permeability set has the advantage that next to one up to high Field strengths constant permeability due to the ferrite content maintain a high specific resistance at the same time remains, resulting in low core losses and thus high grades of coils containing this core material are guaranteed.
- the magnetic material is made of a ferrite / plastic composition with a mixing ratio formed by the maximum expected external field strength and the minimum permissible Permeability is set. It is preferably is a composition of a nickel / zinc ferrite and an epoxy resin in a mixing ratio of 75 to 95 % By weight, preferably 83 to 88% by weight of ferrite and 5 to 25% by weight, preferably 12 to 17% by weight of epoxy resin.
- other ferrites instead of nickel / zinc ferrite, e.g. B. a manganese / zinc ferrite and others instead of epoxy resin Plastics, e.g. B. other thermosets can be used.
- the material used instead of sintering Hardening at relatively low temperatures to produce coil cores can also be processed, the result is Advantage that the shrinkage associated with sintering Cores are avoided, so that predetermined core dimensions easier can be met.
- the nickel / zinc ferrite powder is used before mixing finely ground with epoxy resin, after which the mixture of this finely ground Powder for about 20 to 30 min by continuous
- the epoxy resin is fed to the ferrite powder.
- the processing The mixture to form granules that can be pressed can be made through Passlers sieves and dedusting take place.
- the hardening of from the granulate pressed moldings take place at relatively low temperatures in the range of approximately 390 to 430 ° K.
- curve 1 shows the initial permeability ⁇ i of a ferrite material with the designation K1
- curve 2 shows the initial permeability for carbonyl iron
- curve 3 shows the initial permeability of the magnetic material used in the form of a ferrite / plastic composition.
- the corresponding curves 1 to 3 show the quality Q of the ring-wound shell cores made of the materials mentioned. The measurements according to curves 1 to 3 were each carried out for a frequency of 100 kHz.
- a comparison of the curves according to FIGS. 1 and 2 shows that the quality Q for the magnetic material used is greater than that for carbonyl iron, although according to FIG. 1 the initial permeability ⁇ i for the magnetic material used is smaller than that for carbonyl iron.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Description
- Figur 1
- ein Diagramm der Anfangspermeabilität als Funktion des Magnetfeldes zum Vergleich eines Spulenkerns aus Ferrit, Carbonyleisen bzw. aus erfindungsgemäß verwendetem Material, und
- Figur 2
- ein der Figur 1 entsprechendes Diagramm der Güte von Spulen mit einem Magnetkern aus den Materialien gemäß Figur 1.
Claims (6)
- Verwendung eines gescherten magnetischen Materials mit möglichst konstanter Permeabilität als Spulenkern in einem induktiven Bauelement für den Einsatz im Bereich hoher magnetischer Fremdfelder,
dadurch gekennzeichnet, daß eine homogene Ferrit/Kunststoff-Zusammensetzung mit einem Ferritanteil zwischen 75 und 95 Gew.% und einem Kunststoffanteil zwischen 25 und 5 Gew.% verwendet wird und
das Mischungsverhältnis innerhalb dieses Bereiches derart eingestellt wird, daß bis zu der maximal zu erwartenden Fremdfeldstärke die minimal erforderliche Permeabilität bei gleichzeitig möglichst hohem elektrischem Widerstand zur Erreichung einer hohen Spulengüte im wesentlichen konstant beibehalten wird. - Verwendung nach Anspruch 1,
dadurch gekennzeichnet, daß
als Ferrit-Material ein Nickel/Zink-Ferrit Verwendung findet. - Verwendung nach Anspruch 1,
dadurch gekennzeichnet, daß
als Ferrit-Material ein Mangan/Zink-Ferrit Verwendung findet. - Verwendung nach einem der Ansprüche 1 und 3,
dadurch gekennzeichnet, das
als Kunststoff Duroplaste Verwendung finden. - Verwendung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß
als Kunststoff Epoxidharz Verwendung findet. - Verwendung nach einem der Ansprüche 1-5,
dadurch gekennzeichnet, daß
ein Nickel/Zink-Ferrit und ein Epoxidharz in einem Mischungsverhältnis von 83 bis 88 Gew.% Ferrit und 12 bis 17 Gew.% Epoxidharz Verwendung findet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9218475U DE9218475U1 (de) | 1991-11-11 | 1992-11-10 | Magnetisches Material für Spulenkerne |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4137042 | 1991-11-11 | ||
DE4137042 | 1991-11-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0542200A1 EP0542200A1 (de) | 1993-05-19 |
EP0542200B1 true EP0542200B1 (de) | 1998-04-15 |
Family
ID=6444529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92119218A Expired - Lifetime EP0542200B1 (de) | 1991-11-11 | 1992-11-10 | Verwendung eines magnetischen Materials als Spulenkern |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0542200B1 (de) |
DE (1) | DE59209285D1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10000523A1 (de) * | 2000-01-08 | 2001-07-26 | Inst Maschinen Antriebe Und El | Ferrit-Compound-Material mit hoher elektromagnetischer Absorption im Frequenzbereich von 20 MHz bis 40 GHz |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2989475A (en) * | 1955-10-25 | 1961-06-20 | Steatit Magnesia Ag | Ferrite of field independent permeability |
DE69012398T2 (de) * | 1989-04-19 | 1995-02-02 | Toda Kogyo Corp | Ferritteilchen und Ferrit-Harz-Komposit für Verbundmagnetkern und Verfahren zu deren Herstellung. |
-
1992
- 1992-11-10 DE DE59209285T patent/DE59209285D1/de not_active Expired - Fee Related
- 1992-11-10 EP EP92119218A patent/EP0542200B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
Gerhard Schnell, "Sensoren in der Automatisierungstechnik", April 1991, Seite 19 * |
Also Published As
Publication number | Publication date |
---|---|
EP0542200A1 (de) | 1993-05-19 |
DE59209285D1 (de) | 1998-05-20 |
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