Patent · US Active

Method of producing an oppositely magnetized magnetic structure

US11742123B2 · kind B2 · utility

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7References

13Claims

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Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Thomas Lisec · Itzehoe, DE
Fabian LOFINK · Itzehoe, DE

Key dates

Filing date	Jul 2, 2020
Grant date	Aug 29, 2023
Priority date	—
Expiry date	May 25, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH01F41/22
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of producing an oppositely magnetized magnetic structure within or on a substrate material includes: generating first and second numbers of cavities within or on a substrate material and filling the first and second numbers of cavities with first and second hard magnetic materials, respectively exhibiting first and second coercive field strengths, wherein the second coercive field strength is smaller than the first coercive field strength. The method further includes magnetizing, in a first direction, the first and second arrangements of magnetic structures, by a magnetic field having a field strength that exceeds the first and second coercive field strengths. The method further magnetizes the second arrangement of hard magnetic structures in a second direction, which differs from the first direction, by a second magnetic field having a field strength below the first coercive field strength but greater than the second coercive field strength.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.