Compact linear motor drive unit

Details Compact linear motor drive unit Compact linear motor drive unit

1991-10-15

1993-07-20

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

318135, 369249, H02K 4100, G11B 1700

Patent

active

052296695

ABSTRACT:
A linear motor drive unit includes a rail, a slider, a plurality of rolling members interposed between the rail and the slider to provide a rolling contact between the slider and the rail, a pair of permanent bar magnets fixedly attached to the rail to provide a fixed magnetic flux along the longitudinal axis of the rail and a moving coil mounted on the slider. The moving coil extends around the slider, and it encloses a part of the rail and also a part of the magnets in a circumferential direction with a predetermined gap therebetween. The current flow through the moving coil is controlled to control the movement of the slider relative to the rail.

REFERENCES:
patent: 4247794 (1981-01-01), Jooss et al.
patent: 4439698 (1984-03-01), Chen
patent: 4698798 (1987-10-01), Faber et al.
patent: 4704712 (1987-11-01), Siryj
patent: 4823336 (1989-04-01), Inada et al.
patent: 4864170 (1989-09-01), Eguchi
patent: 4922143 (1990-05-01), Gosdowski et al.
patent: 5023495 (1991-06-01), Ohsaka et al.
patent: 5072144 (1991-12-01), Saito et al.

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