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. 26, 2013
Filed:
Mar. 21, 2008
HU LI, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Hiroki Sato, Fukui, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Supposing a straight line joining rotation center O of a rotor and a magnetic pole middle, that is, a middle of permanent magnets () to be a d-axis, and a straight line joining rotation center O and an intermediate point of mutually adjacent permanent magnets () to be a q-axis, mutually adjacent arcs Aand Aare composed such that radius Rof arc Aat the d-axis side is larger than radius Rof arc Aat the q-axis side, and that, at intersection point β of mutual arcs Aand A, angle α of tangent u of arc Aat the q-axis side with respect to tangent t of arc Aat the d-axis side is set by −3 degrees≦α≦2 degrees.