The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2021
Filed:
Aug. 25, 2017
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/053 (2006.01); H01F 1/055 (2006.01); H01F 1/08 (2006.01); H01F 1/059 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/055 (2013.01); H01F 1/0557 (2013.01); H01F 1/08 (2013.01); H01F 1/0596 (2013.01); H02K 1/02 (2013.01);
Abstract
A high-performance permanent magnet is provided. A permanent magnet expressed by a composition formula: (RA)FeMCuCo. The magnet comprises a metal structure including a plurality of crystal grains which constitutes a main phase having a ThZncrystal phase, An Fe concentration of each of the crystal grains is 28 atomic % or more. A concentration difference of the element A among the crystal grains is not less than 0.2 atomic % nor more than 3.0 atomic %.