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. 26, 2014
Filed:
Mar. 07, 2011
HU LI, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Hideaki Matsuo, Osaka, JP;
Yuichiro Tashiro, Osaka, JP;
Hu Li, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Hideaki Matsuo, Osaka, JP;
Yuichiro Tashiro, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A clutch mechanism moving together with an actuator allows coupling or decoupling an inner rotor to or from a power shaft, thereby controlling a rotation angle. This structure allows a polarity of a magnetic pole of the inner rotor to be the same as that of an opposing magnetic pole of an outer rotor when the motor is driven at a low rpm, so that magnetic fluxes inter-linking with windings can be increased, which results in greater torque. When the motor is driven at a high rpm, the structure allows the polarity of the magnetic pole of the inner rotor to be different from that of the opposing magnetic pole of the outer rotor, so that an amount of leakage flux is increased, and the magnetic fluxes inter-linking with the winding are decreased. As a result, an induction voltage is lowered and a high rpm range is widened.