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:
Jan. 08, 2019
Filed:
Mar. 29, 2017
Applicant:
Industrial Technology Research Institute, Hsinchu, TW;
Inventors:
Assignee:
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/12 (2006.01); H02K 1/27 (2006.01); H02K 1/30 (2006.01);
U.S. Cl.
CPC ...
H02K 1/2786 (2013.01); H02K 1/30 (2013.01); H02K 2213/03 (2013.01);
Abstract
An external rotor motor includes an inner stator and an external rotor. The external rotor includes a casing and a plurality of magnets. The casing has an annular inner wall. The annular inner wall faces the inner stator and surrounds the inner stator. The magnets are placed along the annular inner wall of the casing. The magnets surround the inner stator. An end of at least one of the magnets has a round edge, a curvature radius of the round edge is R, a thickness of the at least one of the plurality of magnets is T, and the following condition is satisfied: 0.85≤R/T≤1.