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:
Dec. 18, 2012
Filed:
Mar. 02, 2010
Applicant:
Naohisa Koyanagi, Isesaki, JP;
Inventor:
Naohisa Koyanagi, Isesaki, JP;
Assignee:
Tokyo Parts Industrial Co., Ltd., Gunma-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/22 (2006.01); H02K 1/24 (2006.01); H02K 23/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a compact motorcomprising a cylindrical permanent magnet, which is affixed to the inner surface of a hollow cylindrical yoke, and an armature core, which is provided at the interior of the permanent magnet, the armature corecomprises three slotsdisposed at a uniform pitch, the permanent magnetis bipolar-magnetized, and each magnetic pole has a maximum magnetic flux density value P in a range of 40° to 50° from the center at both sides of the magnetic pole, the maximum value P being within the range of 1.3 times to 1.8 times the magnetic flux density at the center of the magnetic pole.