Magnetic bearing construction

Details Magnetic bearing construction Magnetic bearing construction

1998-11-13

1999-10-19

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

310216, 310217, H02K 709

Patent

active

059694521

ABSTRACT:
A magnetic bearing (10) is provided for supporting a rotor (12) for rotation about an axis (14). The magnetic bearing (10) includes a plurality of actuator cores (16) spaced circumferentially about the axis (14), and a plurality of non-magnetic spacers (18A, 18B). Each of the cores (16) has a pair of circumferentially spaced end surfaces (28). Each of the spacers (18A, 18B) is positioned between the end surfaces (28) of adjacent pairs of the cores (16) and has an interference fit with the end surfaces (28) to form a circumferentially preloaded ring (19) of the cores (16) and spacers (18A, 18B) centered on the axis (14). At least one of the non-magnetic spacers is a multi-piece assembly (18A) including a shim (32, 49) having a width selected to provide the circumferential preload within a predetermined range.

REFERENCES:
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patent: 4225799 (1980-09-01), Bishai
patent: 4338533 (1982-07-01), Grafenschnell
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patent: 5300843 (1994-04-01), Lyons et al.
patent: 5572079 (1996-11-01), Pinkerton
patent: 5578880 (1996-11-01), Lyons et al.
patent: 5619084 (1997-04-01), Lau
patent: 5679992 (1997-10-01), Miyamoto et al.
patent: 5729066 (1998-03-01), Soong et al.

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