Linear motor

Details Linear motor Linear motor

1990-11-07

1992-02-11

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310 13, 318135, H02K 4102, H02K 4100

Patent

active

050878441

ABSTRACT:
In a linear motor having at least one pair of permanent magnet assemblies opposing each other via a gap therebetween, each of the permanent magnet assemblies is constituted by a plurality of permanent magnets, and each of the permanent magnets has, in a plane perpendicular to the moving direction of a movable member, a cross section satisfying the relation: Ac>Ae, wherein Ac represents a cross section in a center portion of the permanent magnet and Ae represents a cross section at each end of the permanent magnet, to obtain a substantially sinusoidal magnetic flux density distribution. Preferably, the permanent magnet has on the side facing the gap a flat center surface and inclined flat surfaces positioned on both sides of the center surface.

REFERENCES:
patent: 4704553 (1987-11-01), Resnicow
patent: 4839543 (1989-06-01), Beakley et al.
patent: 4908533 (1990-03-01), Karita et al.
patent: 4937485 (1990-06-01), Mikalko

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