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:
May. 27, 2025
Filed:
Aug. 26, 2022
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/055 (2006.01); C22C 19/07 (2006.01); C22C 30/02 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/055 (2013.01); C22C 19/07 (2013.01); C22C 30/02 (2013.01); H02K 1/02 (2013.01); C22C 2202/02 (2013.01); H01F 1/0557 (2013.01);
Abstract
A permanent magnet to be provided to a rotary electric machine. The magnet is expressed by a composition formula: RFeMCuCo. R is selected from rare earth elements, M is selected from Ti, Zr, and Hf, p is a number satisfying 10.5≤p≤12.5 at %, r is a number satisfying 18≤r≤32 at %, s is a number satisfying 0.88≤s≤4.5 at %, and t is a number satisfying 0.88≤t≤13.5 at %. When a proportion rof Fe to a total sum of Fe and Co is expressed by r=r/(100−p−s−t), a value rof the proportion rat a center in a q-axis direction of the magnet and a value rof the proportion rat a center in d-axis direction of the magnet satisfy 1.01≤r/r≤2.