Method of making permanent magnet rotor

Details Method of making permanent magnet rotor Method of making permanent magnet rotor

1984-06-21

1985-07-02

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Electrical device making

310156, 310216, 310217, H02K 1502

Patent

active

045259259

ABSTRACT:
A rotor for a permanent magnet machine comprises an even plurality of pole pieces joined together by intermediate nonmagnetic segments to form a hollow cylinder. A plurality of magnets is situated adjacent to the interior portion of the pole pieces, with the magnets defining a central axial opening. A rotor core has a plurality of saucer shaped elements arranged in a stack situated inside the central opening. Means for providing opposing axial forces to the rotor core tend to flatten the saucer shaped elements and thereby cause radial expansion of the rotor core holding the magnets against the interior of the hollow cylinder.

REFERENCES:
patent: 1286013 (1918-11-01), Jeannin
patent: 1305604 (1919-06-01), Holy
patent: 2680822 (1954-06-01), Brainard
patent: 3597835 (1971-08-01), Scaillet
patent: 4117360 (1978-09-01), Richter
patent: 4139790 (1979-02-01), Steen
patent: 4214182 (1980-07-01), Keim

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