Magnet Core and Method for Its Production
First Claim
1. A magnet core produced from a composite of a powder of amorphous or nanocrystalline particles and from at least one pressing additive,wherein the particles comprise a first surface that formed a surface of the strip from which the particle was produced, and a second surface that did not form a surface of the strip, but was produced in a pulverisation process that formed the particles from the strip,wherein the overwhelming majority of these second particle surfaces are smooth cut or surfaces formed by fracture without any plastic deformation, such that the proportion T of areas of plastic deformation of the second particle surfaces is 0≦
- T≦
0.5.
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Accused Products
Abstract
Magnet cores pressed using a powder of nanocrystalline or amorphous particles and a pressing additive should be characterised by minimal iron losses. These particles have first surfaces represented by the original strip surfaces and second surfaces represented by surfaces produced in a pulverisation 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≦T≦0.5.
85 Citations
33 Claims
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1. A magnet core produced from a composite of a powder of amorphous or nanocrystalline particles and from at least one pressing additive,
wherein the particles comprise a first surface that formed a surface of the strip from which the particle was produced, and a second surface that did not form a surface of the strip, but was produced in a pulverisation process that formed the particles from the strip, wherein the overwhelming majority of these second particle surfaces are smooth cut or surfaces formed by fracture without any plastic deformation, such that the proportion T of areas of plastic deformation of the second particle surfaces is 0≦
- 11. An inductive component comprising a magnet core according to 1.
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16. A method for the production of a magnet core, comprising:
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providing a strip or foil of an amorphous or nanocrystalline soft magnetic alloy; pulverising the strip or foil in a pulverising chamber, wherein the pulverising occurs largely by cutting and/or breaking of the amorphous or nanocrystalline magnetic alloy strip or foil to form powder particles, such that a sufficient number of powder particle surfaces that are formed during pulverizing are smooth cut or formed by fracture without any plastic deformation, that the proportion T of areas of plastic deformation of these particle surfaces is 0≦
T≦
0.5;removing the powder particles from the pulverising chamber on reaching their final particle size; mixing the powder particles with one or more pressing additives; pressing the resulting mixture to form a magnet core. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 32)
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33. A method for the production of a magnet core, comprising
providing a strip or foil of an amorphous or nanocrystalline soft magnetic alloy; -
pulverising the strip or foil in a pulverising chamber, wherein the pulverising occurs largely by cutting and/or breaking of the amorphous or nanocrystalline magnetic alloy strip or foil to form powder particles; removing the powder particles from the pulverising chamber on reaching their final particle size; mixing the powder particles with one or more pressing additives; pressing the resulting mixture to form a magnet core.
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Specification