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:
Dec. 28, 2004
Filed:
Apr. 14, 2003
Applicant:
Inventors:
Hiroshi Murakami, Suita, JP;
Yuichiro Sadanaga, Katano, JP;
Yasufumi Ikkai, Kobe, JP;
Taro Kishibe, Nishinomiya, JP;
Shinichiro Kawano, Daito, JP;
Toshiyuki Tamamura, Kusatsu, JP;
Haruhiko Kado, Moriyama, JP;
Yukihiro Okada, Katano, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/22 ; H02K 1/900 ;
U.S. Cl.
CPC ...
H02K 1/22 ; H02K 1/900 ;
Abstract
An electric motor is equipped with a rotor having multiple rows of slits arranged along a radial direction. A permanent magnet is buried only in some of the slits, namely the ones closest to the center of the rotor or the innermost slits, to drive the motor using both magnet torque and reluctance torque. This improves the torque output.