Method of making a permanent magnet rotor

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

1983-12-05

1985-04-16

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

310 42, 310156, H02K 1502

Patent

active

045106800

ABSTRACT:
A permanent magnet rotor has a north and a south pole piece each separated into two sections by a central nonmagnetic insert to reduce the quadrature flux. The pole piece sections are welded to the central nonmagnetic insert, two nonmagnetic segments are welded to either end of the north pole piece and two magnetic segments are welded to either end of the south pole pieces to form two half rings. The half rings are secured about a solid shaft of magnetic material having a central portion with a rhombic cross section. The centerline of the half rings is aligned with the diagonal of the square central portion. The half rings are bolted to one another. The sides of the shaft and the inner faces of the half rings form four apertures extending the axial length of the pole pieces. A magnet which adds no structural strength to the rotor is positioned in each of the apertures, respectively. Two of the magnets have their north seeking face adjacent the north pole piece and two of the magnets have their south seeking face adjacent the south pole piece, forming a two pole rotor.

REFERENCES:
patent: 2985779 (1961-05-01), Flanigan et al.
patent: 3492520 (1970-01-01), Yates
patent: 3567974 (1971-03-01), Spingler
patent: 3840763 (1974-10-01), Baumann et al.
patent: 4117360 (1978-09-01), Richter
patent: 4139790 (1979-02-01), Steen
patent: 4358697 (1982-11-01), Liv et al.

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