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, 2005
Filed:
Sep. 04, 2002
Sadaaki Mori, Mie, JP;
Hirohide Inayama, Nara, JP;
Atsushi Ishihara, Oxford, GB;
Tomofumi Takahashi, Aichi, JP;
Minoru Kitabayashi, Aichi, JP;
Tetsuo Horie, Aichi, JP;
Sadaaki Mori, Mie, JP;
Hirohide Inayama, Nara, JP;
Atsushi Ishihara, Oxford, GB;
Tomofumi Takahashi, Aichi, JP;
Minoru Kitabayashi, Aichi, JP;
Tetsuo Horie, Aichi, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
A bridge () in conformity with a tooth opening angle of the stator () is provided between a permanent magnet () and a permanent magnet () in a rotor (), so that a magnetic flux for a reluctance torque is made to pass an inner side of the permanent magnet (). An opening angle of each of ribs () on both sides of the permanent magnet () is set to be equal to or smaller than the teeth interval opening angle and equal to or larger than a half thereof. Thereby, reluctance of the rib () against a magnetic flux in a circumferential direction is increased and leakage of the magnetic flux of the permanent magnet () is prevented.