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:
Apr. 08, 2008
Filed:
Oct. 31, 2005
Keizo Kashihara, Yamatokoriyama, JP;
Kazuhiko Matsumoto, Yamatokoriyama, JP;
Masaru Horikawa, Yamatokoriyama, JP;
Keizo Kashihara, Yamatokoriyama, JP;
Kazuhiko Matsumoto, Yamatokoriyama, JP;
Masaru Horikawa, Yamatokoriyama, JP;
Mori Seiko Co., Ltd., Yamatokoriyama-shi, JP;
Abstract
A permanent magnet synchronous motor is of a rotating magnetic field type, and includes a stator which generates a rotating magnetic field, and a rotor having fixed magnetic poles. The rotor includes first and second rotor units arranged axially thereof. The first and second rotor units each have a rotor core, and permanent magnet pieces bonded on the outer peripheral surface of the rotor core. The rotor cores of the first and second rotor units are engaged with each other. The rotor cores each have pin insertion holes into which guide pins are inserted to position the rotor units in proper circumferential positional relation with respect to each other when the rotor cores are connected to each other by bolts.