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. 28, 2018
Filed:
Dec. 25, 2013
Nidec Corporation, Kyoto, JP;
Akira Ichien, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
Provided is a rotor for use in an inner rotor-type motor, comprising a plurality of magnets arranged in a circumferential direction around the center axis, and a rotor core formed of a magnetic material. The rotor core has an inner core part and a plurality of outer core parts. The plurality of outer core parts and the plurality of magnets are alternately arranged in a circumferential direction at a radially outer side of the inner core part. The magnet has a pair of circumferential end surfaces which are magnetic pole surface, and at least one of them is a protruded surface. Also, the magnet has a portion of which circumferential width is wider than a circumferential width of an outer end surface. For this reason, the volume of the magnet can be increased and the magnetic force of the rotor can be increased, without the need to increase the diameter of the rotor. As a result, when such rotor is incorporated into a motor, the torque of the motor can be improved.