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:
Jul. 28, 2020
Filed:
Jun. 28, 2017
Fuji Electric Co., Ltd., Kawasaki, JP;
Hideki Ohguchi, Hino, JP;
Hitoshi Nakazono, Suzuka, JP;
Hideki Nishikawa, Kameyama, JP;
Toshiya Sasaki, Suzuka, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
Magnet slot includes a permanent magnet insertion portion and air regions that is formed at both circumferential direction ends of the permanent magnet insertion portion. The air region includes a first circumferentially extending portion that extends from a circumferentially end portion of the permanent magnet insertion portion to a circumferentially outer side, a radially extending portion that extends from the first circumferentially extending portion to a radially inner side, and a second circumferentially extending portion that extends from the radially extending portion to a circumferentially inner side until reaching between the radially inner peripheral surface of the permanent magnet insertion portion and the shaft hole. A radially inner end surface of the radially extending portion and a radially inner end surface of the second circumferentially extending portion are made up of a portion of a circular arc in contact with the circumferentially outer side surface of the radially extending portion.