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US 4,338,533 AGranted
Electric machine excited by permanent magnets
AssigneeSiemens Aktiengesellschaft
InventorHorst Grafenschnell
Life of this patent
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Abstract
An electric machine without pole pieces excited by permanent magnets is disclosed in which the stator of the machine comprises a yoke frame of angular outside shape having an even number of corners which exceeds 2 and of circular inside shape. The yoke frame forms the magnetic return and arc-shaped permanent magnets corresponding to the inside shape of the yoke frame are fastened in the inside of the yoke frame with lateral spaces therebetween, the magnets being centrally disposed between respective corners of the frame.
Claims4
A permanent magnet excited electric machine including a stator which comprises:
- a yoke frame of angular outside shape in which the number of corners thereof is even and greater than two and of circular inside shape, said yoke frame forming the magnetic return, and
- a plurality of laterally spaced, arc-shaped permanet magnets secured to the inside of the yoke frame, each being disposed generally centered with respect to two adjacent corners.
Dependencies are inferred from the claim text.