EP2521143A1 - Matière magnétiquement active - Google Patents

Matière magnétiquement active Download PDF

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Publication number
EP2521143A1
EP2521143A1 EP12002333A EP12002333A EP2521143A1 EP 2521143 A1 EP2521143 A1 EP 2521143A1 EP 12002333 A EP12002333 A EP 12002333A EP 12002333 A EP12002333 A EP 12002333A EP 2521143 A1 EP2521143 A1 EP 2521143A1
Authority
EP
European Patent Office
Prior art keywords
subcomponent
pore structure
material according
magnetically active
texturing
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.)
Granted
Application number
EP12002333A
Other languages
German (de)
English (en)
Other versions
EP2521143B8 (fr
EP2521143B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEITZ, NORMAN
Original Assignee
Voigt Volker
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 Voigt Volker filed Critical Voigt Volker
Publication of EP2521143A1 publication Critical patent/EP2521143A1/fr
Application granted granted Critical
Publication of EP2521143B1 publication Critical patent/EP2521143B1/fr
Publication of EP2521143B8 publication Critical patent/EP2521143B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F1/14—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
    • H01F1/14708—Fe-Ni based alloys
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems

Definitions

  • the invention is based on a magnetically active material.
  • Magnetically active materials in particular for electrotechnical, magnetic and / or electronic applications, are already known from the prior art.
  • the invention is based on a magnetically active material, in particular for electrical, magnetic and / or electronic applications.
  • the material has at least one magnetically active, in particular first, subcomponent, which is of cellular design and which has a pore structure.
  • the magnetically active subcomponent is preferably provided to at least partially reflect, absorb and / or conduct energy received with an electromagnetic and / or magnetic oscillation.
  • “magnetically active” is to be understood as meaning that the material, preferably the cellular first subcomponent, has a permeability number greater than 4, advantageously greater than 40, particularly advantageously greater than 100, has.
  • the magnetically active first subcomponent preferably has a ferromagnetic or advantageously ferrimagnetic property.
  • a "subcomponent” is to be understood as meaning in particular a component which at least partially forms the material.
  • the first subcomponent forms between 20% and 80%, particularly advantageously between 30% and 70%, of a volume of the magnetically active material.
  • the material is preferably formed by at least the magnetically active first subcomponent and by at least one magnetically less effective, advantageously ineffective, second subcomponent.
  • the second subcomponent is at least partially formed by air, by an oil, by a plastic, by a resin and / or by another substance that appears appropriate to a person skilled in the art.
  • the second subcomponent could be at least partially dependent on an environment of the material.
  • the magnetically active first subcomponent preferably forms a coherent, in particular sponge-like, cellular structure.
  • the magnetically effective first subcomponent is at least partially, advantageously completely, formed from a metallic material.
  • the magnetically effective first subcomponent is made of a material which appears expedient to a person skilled in the art, but preferably of an iron-based material, a steel, a ferrite, of mumetal, of an iron-silicon alloy, of an amorphous metal and / or of a nanocrystalline one Metal.
  • the term "cellular" should be understood to mean that the magnetically active first subcomponent has a plurality of cells.
  • the cells have a similar structure.
  • the cells confine pores that are similar to each other.
  • similar is meant in this context, in particular, that at least 20% of the cells define a pore having a volume that differs by less than 80% from an average volume of all pores.
  • a "pore structure” is to be understood in particular as meaning a structure which delimits a plurality of pores.
  • the pore structure forms cell walls of the pores.
  • the pore structure is formed as a pore structure.
  • the pore structure is at least partially closed and / or advantageously at least partially open, whereby a particularly high strength of the magnetically active provided first partial component and / or advantageously the second sub-component can be introduced into the pores.
  • openly designed is to be understood in particular as meaning that the magnetically effective first subcomponent limits interconnected pores.
  • closed design should be understood in particular to mean that the magnetically effective first subcomponent delimits the pores relative to one another.
  • the pore structure is at least partially open.
  • the pore structure has an effect with a hard-magnetic or soft-magnetic characteristic, as a result of which, inter alia, a particularly high internal damping of the subcomponent can be achieved.
  • the magnetically active subcomponent has a soft magnetic characteristic, whereby an advantageous use of the material in devices for energy transmission and energy conversion is possible.
  • the magnetically active subcomponent has a hard magnetic characteristic, whereby, inter alia, an advantageous use of the material for shielding, reflection, absorption of electromagnetic and / or magnetic fields and as a permanent magnet are possible.
  • a "soft magnetic characteristic” is to be understood in particular as a characteristic curve of a material which has a coercive force of less than 1000 A / m.
  • a “hard magnetic characteristic” is to be understood in particular a characteristic of a material having a coercive force greater than 1000 A / m.
  • the pore structure is mechanically and / or thermally post-treated to achieve texturing, whereby a magnetic behavior can be optimized.
  • a particularly high isotropic strength of the subcomponent can be achieved, in particular with respect to a laminated core of a comparable, conventional magnetic core.
  • a "texturing" should be understood to mean that the magnetically active component component has different structures along two different directions. Preferably, the directions are aligned perpendicular to each other.
  • the pores bounded by the magnetically active subcomponent have different average main extensions along the two different directions.
  • the magnetically active subcomponent preferably has a different one in the different directions Permeability number.
  • the textured subcomponent is made from an untextured subcomponent.
  • the textured subcomponent could be made directly.
  • the subcomponent is textured by at least one applied force.
  • the subcomponent is textured by two perpendicularly aligned forces.
  • the subcomponent is heated during texturing.
  • a microstructuring of the pore structure can be achieved by the mechanical and / or thermal aftertreatment.
  • advantageous grain boundaries and crystal structures that appear reasonable to the person skilled in the art are possible, as a result of which a magnetic behavior of the material can be further optimized.
  • the pore structure has a texturing, as a result of which the magnetically active component component can absorb and / or guide rays particularly well.
  • it can be achieved by texturing that the material has different magnetic properties in the different directions, as a result of which losses, in particular due to eddy currents, can be minimized.
  • the pore structure limits pores substantially edged, whereby a particularly effective texturing can be achieved.
  • edged limited is understood to mean that the pore-limiting regions of the pore structure have an edge.
  • the pore structure preferably limits the pores substantially discontinuously.
  • the pore structure limits the pores in a substantially lenticular shape, wherein an edge is advantageously arranged on a narrow side of the lens mold.
  • the pore structure substantially limits the pores to a shape different from an ellipsoidal and, in particular, continuous shape.
  • the pore structure substantially confines the pores with a shape different from a parallelepiped.
  • substantially in this context, in particular more than 50% of the pores, preferably more than 75% of the pores, should be understood. Alternatively or additionally, “substantially” could be understood as meaning more than 50%, preferably more than 75%, of a surface of the pore structure bounding the pores.
  • a strength of the material can be further increased if the magnetically active subcomponent is cantilevered.
  • self-supporting should be understood as supporting oneself in particular.
  • the strength of the subcomponent can be further increased.
  • a "support structure” is to be understood in particular an element which is intended to at least partially divert a force acting in the direction of the magnetically active subcomponent.
  • the support structure has a higher mechanical strength than the magnetically active subcomponent.
  • a mechanical oscillation of the material in particular caused by magnetostriction, can be advantageously damped by a filling medium arranged within the pore structure.
  • the filling medium is formed by an oil or an oil-containing liquid.
  • the filling medium forms a magnetically less effective, advantageously ineffective, subcomponent of the material.
  • the subcomponent is intended to substantially absorb electromagnetic oscillations, whereby a reflection of electromagnetic waves can advantageously be substantially reduced.
  • a size of the pores of the pore structure and in particular a texturing is tuned to an intended frequency of the electromagnetic waves.
  • FIG. 1 shows a magnetically active material for electrical, magnetic and / or electronic applications.
  • the material has a magnetically active subcomponent 10a.
  • the subcomponent 10a is cellular.
  • the subcomponent 10a has a pore structure 12a.
  • the pore structure 12a is shown in FIG FIG. 1 isotropic. Further, the pore structure 12a is formed as a mesostructure. Electromagnetic radiations incident on sub-component 10a are largely absorbed by pore structure 12a.
  • the subcomponent 10a is formed from a metallic material.
  • the metallic material is a nickel-iron alloy in the embodiment shown.
  • the pore structure 12a has an effect with a hard magnetic or soft magnetic characteristic.
  • the subcomponent 10a is electrically effective depending on the choice of material.
  • the pore structure 12a is characterized by a plurality of cavities 14a, 16a that trap air.
  • cavities 14a, 16a that trap air.
  • other materials which appear expedient to the person skilled in the art to fill the cavities 14a, 16a, in particular liquids or inert gases.
  • the pore structure 12a is with a gas or a liquid filled, which leads to a change in a volume weight of the material and thus a change in an inertial moment.
  • the pore structure 12a is partially open and partially closed. In an interior of the pore structure 12a, the cavities 16a are formed closed. At an edge region, the cavities 14a are opened to an environment. However, it is also conceivable in this connection to form all the cavities of the subcomponent 10a open or closed.
  • a diameter of a single cavity is about 1 mm. Depending on the application, however, other diameters of the cavities are conceivable, such as in particular smaller than 50 microns or larger than 5 mm. The choice of the appropriate diameter depends in particular on a wavelength of an incident during operation and radiation to be absorbed.
  • the material is intended for use in a system having an electric motor, a transformer, a sensor, an absorption element, an electromagnet and / or an actuator. In particular, it influences field lines in the system and absorbs electromagnetic radiation.
  • FIGS. 2 and 3 two further embodiments of the invention are shown.
  • the following descriptions are essentially limited to the differences between the exemplary embodiments, it being possible to refer to the description of the first exemplary embodiment with regard to components, features and functions that remain the same.
  • the letter a in the reference numerals of the embodiment in the FIG. 1 by the letters b and c in the reference numerals of the embodiments of the FIGS. 2 and 3 replaced.
  • FIG. 2 shows a further embodiment of the invention, wherein a pore structure 12b of a sub-component 10b is mechanically and thermally treated to achieve a texturing.
  • the pore structure 12b has an anisotropic texturing 18b in the second exemplary embodiment.
  • the subcomponent 10b is cantilevered.
  • a radiation incident on the sub-component 10b is absorbed to a large extent by the texturing 18b.
  • a "size part” should be understood in this context, in particular more than 80%.
  • the sub-component 10b is intended to substantially absorb electromagnetic vibrations, whereby a reflection of electromagnetic waves can advantageously be substantially reduced.
  • the material has an inner and outer support structure 20c supporting a first subcomponent 10c.
  • the support structure 20c is made of aluminum.
  • plastics, glass fiber materials, carbon fiber materials and / or other metallic substances are also possible.
  • the second subcomponent 22c comprises an oil, a gel and / or another damping agent which appears reasonable to the person skilled in the art.
  • a vibration of the material is reduced compared to a material without introduced second sub-component.
EP12002333.8A 2011-05-06 2012-03-30 Matériau magnétiquement actif Not-in-force EP2521143B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011100805A DE102011100805A1 (de) 2011-05-06 2011-05-06 Magnetisch wirksamer Werkstoff

Publications (3)

Publication Number Publication Date
EP2521143A1 true EP2521143A1 (fr) 2012-11-07
EP2521143B1 EP2521143B1 (fr) 2015-06-03
EP2521143B8 EP2521143B8 (fr) 2015-07-22

Family

ID=46000628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12002333.8A Not-in-force EP2521143B8 (fr) 2011-05-06 2012-03-30 Matériau magnétiquement actif

Country Status (3)

Country Link
EP (1) EP2521143B8 (fr)
DE (1) DE102011100805A1 (fr)
ES (1) ES2546494T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112143864A (zh) * 2020-09-28 2020-12-29 南通巨升非晶科技股份有限公司 一种高性能铁基非晶纳米晶合金热处理工艺
US20210265112A1 (en) * 2018-06-29 2021-08-26 Lg Chem, Ltd. Composite material
JP2022501830A (ja) * 2018-09-28 2022-01-06 エルジー・ケム・リミテッド 無線充電装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1383138A1 (fr) * 2002-07-18 2004-01-21 Hokkaido University Absorption des ondes électromagnetique
US20070046408A1 (en) * 2005-08-30 2007-03-01 Youngtack Shim Magnet-shunted systems and methods
JP2008016458A (ja) * 2004-08-18 2008-01-24 Teijin Ltd 電磁波吸収シート材料
DE102008022065A1 (de) * 2008-05-03 2009-11-05 Ralph Dr. Lucke Werkstoff zur Wärmedämmung mit abschirmenden Eigenschaften gegen elektromagnetische Strahlung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4424157C2 (de) * 1993-07-29 1996-08-14 Fraunhofer Ges Forschung Verfahren zur Herstellung poröser metallischer Werkstoffe mit anisotropen thermischen und elektrischen Leitfähigkeiten
DE102007041050A1 (de) * 2007-08-29 2009-03-12 Carl Freudenberg Kg Ventil mit magnetischem Schaumstoffdichtkörper
DE102009040486B3 (de) * 2009-09-08 2011-04-28 Carl Freudenberg Kg Magnetschaumsensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1383138A1 (fr) * 2002-07-18 2004-01-21 Hokkaido University Absorption des ondes électromagnetique
JP2008016458A (ja) * 2004-08-18 2008-01-24 Teijin Ltd 電磁波吸収シート材料
US20070046408A1 (en) * 2005-08-30 2007-03-01 Youngtack Shim Magnet-shunted systems and methods
DE102008022065A1 (de) * 2008-05-03 2009-11-05 Ralph Dr. Lucke Werkstoff zur Wärmedämmung mit abschirmenden Eigenschaften gegen elektromagnetische Strahlung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210265112A1 (en) * 2018-06-29 2021-08-26 Lg Chem, Ltd. Composite material
JP2022501830A (ja) * 2018-09-28 2022-01-06 エルジー・ケム・リミテッド 無線充電装置
CN112143864A (zh) * 2020-09-28 2020-12-29 南通巨升非晶科技股份有限公司 一种高性能铁基非晶纳米晶合金热处理工艺

Also Published As

Publication number Publication date
EP2521143B8 (fr) 2015-07-22
EP2521143B1 (fr) 2015-06-03
ES2546494T3 (es) 2015-09-24
DE102011100805A1 (de) 2012-11-08

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