Vacuumschmelze Gmbh & Company Kg

Vacuumschmelze Gmbh

Vacuumschmelze Gmbh & Co Kg

Other

Markus Brunner

Lothar Zapf

Dieter Nuetzel

Georg Werner Reppel

Joerg Petzold

Johannes Tenbrink

Klemens Trabold

Johannes Binkofski

Ralf Koch

Harald Staubach

Martin Kehlenbach

Niklas Volbers

There is provided a water-based alkaline composition for forming an insulating layer of an annealing separator on a soft magnetic alloy, this composition comprising ceramic particles with a particle size of less than 0.5 μm and at least one polymer dispersion as a binding agent, the polymer dispersion comprising one or more mixed polymerisates from the group made up of acrylate polymers, methacrylate polymers, polyvinyl acetate, polystyrene, polyurethane, polyvinyl alcohol, hydroxylated cellulose ether, polyvinyl pyrrolidone, and polyvinyl butyral, and having a pH value of between 8 and 12, preferably between 9 and 11.

Water-based alkaline composition for forming an insulating layer of an annealing separator, coated soft magnetic alloy and method for producing a coated soft magnetic strip

A magnetic core and method for the manufacture of the magnetic core is presented. The method comprises winding an amorphous tape of a soft magnetic nanocrystallizable alloy possessing a first coefficient of thermal expansion onto a carrier of a material possessing a second coefficient of thermal expansion, wherein the second coefficient is larger than the first coefficient; a first thermal treatment of the wound tape together with the carrier, wherein the first thermal treatment creates a tension in the tape although the alloy remains in an x-ray amorphous state, removing the carrier from the wound tape after cooling of the wound tape together with the carrier; and a second thermal treatment of the wound tape without the carrier, wherein the second thermal treatment provides a nanocrystalline alloy structure, at least 50% of the alloy structure being fine crystalline particles having an average particle size of 100 nanometers or less.

Method for the manufacture of a nanocrystalline magnetic core

A composition for an adhesive material, comprising at least one epoxide resin mixture and a hardening accelerator, in which the epoxide resin mixture has 25 to 80% by weight of a first epoxide resin&#x2014;whereby the first epoxide resin is a bifunctional aliphatic, cycloaliphatic or aromatic epoxide resin&#x2014;and 12.5 to 40% by weight of a second epoxide resin&#x2014;whereby the second epoxide resin is a polyfunctional aliphatic or aromatic epoxide resin&#x2014;and in which the hardening accelerator is an imidazole derivative, which is not soluble in the epoxide resin mixture at temperatures of below 50&#xb0; C.

Composition for an adhesive material

The invention relates to an antenna core, an antenna comprising an antenna core, and to methods for producing an antenna core and an antenna. The antenna core used in each case consists of a continuous soft-magnetic strip having a plurality of layers which are stacked one on top of the other and each of which is formed by a section of the strip. The layers are connected to one another by curved sections of the strip at end regions of the antenna core.

Antenna core, antenna, and methods for producing an antenna core and an antenna

A method for producing a current metering device with current conductor optionally made of aluminum or aluminum alloy, which has a middle section in the form of a bar and two end sections with flattened areas, and is bent between one end section at a time and the middle section, a magnetic module which has a bushing which holds the current conductor, and two copper or copper alloy sleeves which are applied at least to parts of the end sections of the current conductor.

Method for producing a current metering device

Magnet cores pressed using a powder of nanocrystalline or amorphous particles and a pressing additive should be characterized by minimal iron losses. These particles have first surfaces represented by the original strip surfaces and second surfaces represented by surfaces produced in a pulverization process, the overwhelming majority of these second particle surfaces being smooth cut or fracture surfaces without any plastic deformation, the proportion T of areas of plastic deformation of the second particle surfaces being 0&#x2266;T&#x2266;0.5.

Magnet core and method for its production

A magnet core () that is suitable for use in a fault current circuit breaker and that is made of a helically wound, magnetically soft band has a top () and a bottom (), the top () and the bottom () being formed by side surfaces () of the magnetically soft band. The magnet core () is fixed in a protective housing (), and there is a contact cement () between the bottom () of the magnet core () and an inside wall () of the housing for fixing the magnet core ().

Magnet core; method for its production and residual current device

Disclosed herein is an inductive component whose soft magnetic core is produced by pouring a casting resin into a mold filled with a soft magnetic alloy powder and by subsequently hardening the casting resin with the alloy powder in order to form a solid soft magnetic core. This technique prevents the surface insulation of the alloy particles from becoming damaged, thereby largely preventing the formation of bulky eddy currents in the resulting soft magnetic cores. This enables a distinct reduction in the electric loss of the inductive component.

Inductive component and method for the production thereof

A magnet core () made of a composite of platelet-shaped particles of a thickness D and a binder has a particularly linear relative permeability curve over a pre-magnetised constant field. For this purpose, the platelet-shaped particles () are provided with an amorphous volume matrix (), wherein areas () with a crystalline structure having a thickness d of 0.04*D&#x2266;d&#x2266;0.25*D and covering a proportion x of x&#x2267;0.1 of the surface () of the particle () are embedded on the surface () of the particle ().

Method for the production of magnet cores, magnet core and inductive component with a magnet core

A magnet core is required to be particularly dense, made of alloys produced in a rapid solidification process and have a minimal coercitive field strength. To achieve these aims, a coarse-grain powder fraction is first produced from an amorphous strip of a soft magnetic alloy. In addition, at least one fine-grain powder fraction is produced from a nanocrystalline strip of a soft magnetic alloy. The particle fractions are then mixed to produce a multi-modal powder, wherein the particles of the coarse-grain particle fraction have an amorphous structure and the particles of the fine-grain powder fraction have a nanocrystalline structure. The multi-modal powder is then pressed to produce a magnet core.

A powder composite core is to be particularly dense and strong while being produced from soft magnetic alloys. In particular, the expansion of the heat-treated core is to be avoided. To produce this core, a strip of a soft magnetic alloy is first comminuted to form particles. The particles are mixed with a first binder having a curing temperature Tand a decomposition temperature Tand a second binder having a curing temperature Tand a decomposition temperature T, wherein T&#x3c;T&#x2266;T&#x3c;T. The mix is pressed to produce a magnet core while the first binder is cured. The magnet core is then subjected to a heat treatment accompanied by the curing of the second binder at a heat treatment temperature T&#x3e;T.

Method for the production of powder composite cores and powder composite core

A method for producing an electricity sensing device with a one-piece, U-shaped bent current conductor of a certain length having a middle portion and two end portions and comprising in the middle portion the form of a rod having a non-rectangular conductor cross-section and featuring flats having a rectangular conductor cross-section in its end portions, and arranged in the middle portion a magnetic module comprising a lead-through for mounting the current conductor, the method comprising the steps: providing the magnetic module as well as a current conductor configured straight and rod-shaped in the middle portion and in at least one of the end portions; tin-coating the current conductor at least partly in at least one end portion; positioning the current conductor and the magnetic module relative to each other such that the current conductor is located in the lead-through of the module by its middle portion, and shaping the current conductor into a U with flattened ends.

Method for producing an electricity sensing device

The invention relates to an inductive component () whose soft-magnetic core () consists of a powder composite. Said powder composite is produced by mixing a ferromagnetic amorphous or nanocrystalline alloy powder with a ferromagnetic dielectric powder and a thermoplastic or duroplastic polymer. Unlike conventional injection-molded or cast soft-magnetic cores, cores from a composite comprising a dielectric ferromagnetic powder allow for packing densities of substantially more than 55% by volume.

Inductive component and method for producing the same

The invention relates to an inductive component () whose soft magnetic core () is produced by pouring a casting resin into a mold () filled with a soft magnetic alloy powder and by subsequently hardening the casting resin with the alloy powder in order to form a solid soft magnetic core. Contrary to conventional injection molding methods, this technique prevents the surface insulation of the alloy particles from becoming damaged so that the formation of bulk eddy currents in the resulting soft magnetic cores can be prevented to a large extent. This enables a distinct reduction in the electric loss of the inductive component.

Inductive component () having at least one coil () and a magnetically soft core () made from a ferromagnetic powder composite in which the ferromagnetic powder composite shows an alloy powder mixture made from alloy powders having formanisotropic as well as formisotropic powder particles and a casting resin.

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Bessenbach, Germany

Markus Brunner