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US 2015/0318096 A1Published application
Magnetic cores and method for producing same
AssigneeSumida Components & Modules GmbH
InventorMichael Alfons BAUMANN
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Abstract
The present invention provides magnetic cores and a method for fabricating same, wherein the magnetic cores have at least two materials with different magnetic properties. The materials are selected from a ferrite material, an oxide ceramic material and a superparamagnetic material and are formed alternately in individual regions along the magnetic core.
Claims23
Magnetically soft core, comprising:
- at least three regions connected to each other and arranged alternately along a longitudinal direction of the magnetic core,
- at least a first material and a second material differing from each other and comprising different magnetic permeabilities, the magnetic permeability of said first material being greater than the magnetic permeability of said second material, wherein, along said longitudinal direction, each region of said second material is surrounded by regions of said first material;
- wherein said first material comprises a first ferrite spinel material and said second material comprises at least one of a second ferrite spinel material and an oxide ceramic material, or the second material comprises a superparamagnetic material, and
- wherein said at least three regions are embodied as layers extending over the complete cross-section of said magnetically soft core.
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Method for fabricating a magnetic core, comprising:
- providing at least a first material and a second material comprising different magnetic properties, said first material comprising a first ferrite material and said second material comprising a second ferrite material and/or an oxide ceramic material;
- forming at least a first material volume portion by pressing at least a portion of the provided first material;
- forming at least a second material volume portion by pressing at least a portion of the provided second material;
- applying a liquid for forming a liquid film at least on one exposed surface of said first material volume portion and/or said second material volume portion;
- and
- arranging a material volume portion directly on the liquid film of another material volume portion.
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Dependencies are inferred from the claim text.