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:
Aug. 27, 2013
Filed:
Jul. 27, 2009
Noriyoshi Nishiyama, Osaka, JP;
Masaki Tagome, Osaka, JP;
Yasuhiro Kondo, Osaka, JP;
Makoto Kitabatake, Nara, JP;
Shun Kazama, Osaka, JP;
Noriyoshi Nishiyama, Osaka, JP;
Masaki Tagome, Osaka, JP;
Yasuhiro Kondo, Osaka, JP;
Makoto Kitabatake, Nara, JP;
Shun Kazama, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A synchronous electric motor includes rotor having a plurality of radially-oriented magnetic dipoles and a stator. Stator teeth group with a plurality of sets of stator teeth are arranged in the same position in terms of an electrical angle with another stator teeth group to provide rotational symmetry about an axis of the rotor. In each of the stator teeth groups a predetermined number of stator teeth are arranged at intervals different from intervals of the rotor magnetic dipoles. A main coil is wound about a predetermined number of stator teeth with a sub-coil further wound around one or more a teeth. Phase and magnitude of a resulting magnetic field is adjusted by the number of loops of the main coil and sub-coil. A given stator tooth can produce maximum torque despite any difference between an alignment of the stator tooth and an inter-polar interval of the stator.