Metal working – Method of mechanical manufacture – Electrical device making
Patent
1985-02-11
1986-12-30
Rosenbaum, Mark
Metal working
Method of mechanical manufacture
Electrical device making
29418, H02K 1502
Patent
active
046318070
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.
REFERENCES:
patent: 3979821 (1976-09-01), Noodleman
patent: 4327302 (1982-04-01), Hershberger
Amemiya Yoichi
Iwamatsu Noboru
Kawada Shigeki
Sogabe Masatoyo
Echols P. W.
Fanuc Ltd.
Rosenbaum Mark
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