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. 24, 2015
Filed:
Nov. 18, 2011
Tsuyoshi Shiga, Tokyo, JP;
Tsuyoshi Shiga, Tokyo, JP;
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Toshiba Consumer Electronics Holdings Corporation, Chiyoda-ku, Tokyo, JP;
Toshiba Home Appliances Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
A permanent magnet motor includes a rotor including a rotor core formed with magnet insertion holes and permanent magnets inserted into the insertion holes. The rotor core includes a plurality of pairs of divided cores. The divided cores of each pair are adjacent to each other, and one divided core of each pair has two ends formed with respective engagement convexities and the other divided core has two ends formed with respective engagement concavities. The permanent magnets included permanent magnets having a lower coercive force and permanent magnets having a higher coercive force. A number of the permanent magnets having the lower coercive force and a number of the permanent magnets having the higher coercive force for each of the divided cores are the same as the other divided cores such that the divided cores have an equal total flux such that the divided cores have an equal total flux.