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:
Dec. 30, 1986
Filed:
Feb. 11, 1985
Shigeki Kawada, Hachioji, JP;
Yoichi Amemiya, Hachioji, JP;
Masatoyo Sogabe, Hachioji, JP;
Noboru Iwamatsu, Hino, JP;
Fanuc Ltd., Yamanashi, JP;
Abstract
A permanent-magnet field rotor (10) includes a plurality of permanent magnets (18) disposed in a radial fashion, and yokes (19) disposed between each two successive permanent magnets (18) and made of a lot of sheet elements (20). The method of manufacturing the permanent-magnet field rotor comprises the step of stacking a lot of same shaped thin plate members (25) each having a plurality of sectoral york element portions (26) arranged in a radial fashion and link portions (27) each linking the outer circumferential edges of each two successive york element portions (26) to one another so as to define therebetween a permanent magnet receiving slot (29). In the state where permanent magnets (18) are inserted in the slots (29) of the stacked thin plate members (25), respectively, the stacked thin plate members (25) are firmly fixed to each other. Each of the link portions (27) of the stacked thin plate members (25) is cut out in the stacking direction by a range which is less than the width of each permanent magnet (18). From this, the yokes (19) made of sheet elements (20) are formed at the opposite sides of each permanent magnet (18) and separated from one another.