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:
Oct. 27, 2015
Filed:
Sep. 06, 2010
Masatsugu Nakano, Chiyoda-ku, JP;
Toshihiro Matsunaga, Chiyoda-ku, JP;
Yusuke Morita, Chiyoda-ku, JP;
Misa Nakayama, Chiyoda-ku, JP;
Kazuhisa Takashima, Chiyoda-ku, JP;
Satoru Akutsu, Chiyoda-ku, JP;
Masatsugu Nakano, Chiyoda-ku, JP;
Toshihiro Matsunaga, Chiyoda-ku, JP;
Yusuke Morita, Chiyoda-ku, JP;
Misa Nakayama, Chiyoda-ku, JP;
Kazuhisa Takashima, Chiyoda-ku, JP;
Satoru Akutsu, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor (), the regions being different by changing a cross-sectional shape in the rotational axis direction in a cross-section perpendicular to a rotational shaft () of the rotor () having the permanent magnets () and the rotor core (); the supplemental grooves () are provided in axial partial regions of each of the teeth () of the stator core (); and the region in which the supplemental groove () is provided is each partial region for each region facing a region same in magnetic circuit design of the rotor (). This enables to reduce cogging torque generated by variations on the rotor side.