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:
Nov. 02, 2021
Filed:
Mar. 19, 2018
Nidec Corporation, Kyoto, JP;
Hiroshi Kitagaki, Kyoto, JP;
Takeshi Honda, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A rotor includes a rotor core in which magnetic steel plates widening in a radial direction with respect to a central axis of the rotor core are laminated in an axial direction, and magnets provided to the rotor core. Each of the magnetic steel plates includes a base portion positioned outside the central axis in the radial direction and piece-shaped portions each spaced by a gap from an outer side in the radial direction of the base portion and arranged in a circumferential direction of the base portion at predetermined intervals. The magnets are positioned at the gaps and arranged in the circumferential direction at predetermined intervals, a length in the radial direction from a central portion of the magnet in the circumferential direction is a central portion length in a cross section perpendicular to the axial direction, a length in the radial direction from an end portion of the magnet in the circumferential direction is an end portion length, the central portion length and the end portion length are lengths in parallel or substantially in parallel, and the central portion length is greater than the end portion length.