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:
May. 31, 2011
Filed:
Jun. 22, 2009
Daisuke Kori, Hitachinaka, JP;
Mamoru Kimura, Hitachi, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Seikichi Masuda, Hitachi, JP;
Masayasu Fujieda, Hitachi, JP;
Daisuke Kori, Hitachinaka, JP;
Mamoru Kimura, Hitachi, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Seikichi Masuda, Hitachi, JP;
Masayasu Fujieda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotor is deployed such that the rotor becomes coaxially rotatable with a stator. A shaft is fixed onto the axis of a rotor iron-core. 1-pole constituting magnet slots are deployed into V-character pattern along an outer circumference portion of the rotor iron-core. Permanent magnets are embedded into the magnet slots. For the 1 pole, the 2 pieces of same-polarity permanent magnets are embedded into the V-character pattern. The configuration of each embedded permanent magnet is designed as follows: From the thickness of the permanent-magnet edge portion on the inner-diameter side of the rotor iron-core, which becomes the center of the V-character pattern, the thickness of the permanent magnet gradually increases toward the outer-diameter side of the rotor iron-core, which become the right and left edge portions of the V-character pattern. Simultaneously, curved lines are provided on both edge portions of the permanent magnet.