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. 15, 2011
Filed:
Sep. 08, 2009
Shigeru Okuma, Nagoya, JP;
Shinji Doki, Nagoya, JP;
Mutsuo Tomita, Nagoya, JP;
Mitsuhiko Sato, Nagoya, JP;
Seiichi Kaneko, Nagoya, JP;
Shigeru Okuma, Nagoya, JP;
Shinji Doki, Nagoya, JP;
Mutsuo Tomita, Nagoya, JP;
Mitsuhiko Sato, Nagoya, JP;
Seiichi Kaneko, Nagoya, JP;
Aichi Elec Co., Kasugai-shi, JP;
Abstract
Permanent magnetsare inserted into magnet insert holesformed in a main magnetic poleA of a rotor. An outer circumferential surface of the rotor includes a first outer circumferential surface portionwhich intersects with a d-axis and second outer circumferential surface portionswhich intersect with a q-axis. A radius Rof curvature of the second outer circumferential surface portionsis larger than a radius of curvature of the first outer circumferential surface portions. Recessesare formed in the second outer circumferential surface portionsand in a position to face end wallsof the magnet insert holeswhich are adjacent to the outer circumferential surface of the rotor. It is constructed such that [(74/P)°≦θ≦(86/P)°] and [(16/P)°≦α≦(48/P)°], where θ is a mechanical angle of the first outer circumferential surface portion, P is the number of pairs of poles of the rotor 50, and α is a mechanical angle of the recesses