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:
Nov. 16, 2021
Filed:
Feb. 25, 2019
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/02 (2006.01); H02K 1/27 (2006.01); H02K 1/17 (2006.01); H02K 7/00 (2006.01); H02K 7/18 (2006.01); F01D 15/10 (2006.01); F01D 15/02 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
H01F 1/057 (2013.01); F01D 15/02 (2013.01); F01D 15/10 (2013.01); H02K 1/02 (2013.01); H02K 1/17 (2013.01); H02K 1/276 (2013.01); H02K 7/003 (2013.01); H02K 7/1823 (2013.01);
Abstract
A permanent magnet comprises crystal grains each including a main phase. An average size of the crystal grains is 1.0 μm or less, and a degree of orientation of easy magnetization axes of the crystal grains to an easy magnetization axis of the magnet is 15% or more and 90% or less. A recoil magnetic permeability is 1.13 or more, a residual magnetization is 0.8 T or more and less than 1.16 T, and an intrinsic coercive force is 850 kA/m or more.