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:
Sep. 30, 2025
Filed:
Dec. 23, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Osaka University, Osaka, JP;
Haruyuki Kometani, Tokyo, JP;
Ryoji Miyatake, Tokyo, JP;
Takuro Yamada, Tokyo, JP;
Kenji Tanaka, Tokyo, JP;
Katsuhiro Hirata, Suita, JP;
Noboru Niguchi, Suita, JP;
Kazuaki Takahara, Suita, JP;
Hironori Suzuki, Suita, JP;
Takuya Ito, Suita, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
OSAKA UNIVERSITY, Osaka, JP;
Abstract
A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.