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Modular Linear Actuator with Flat Coil Voice Coil Motor

IP.com Disclosure Number: IPCOM000052984D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Johnson, DO Roshon, CC [+details]

Abstract

Fig. 1 illustrates diagrammatically a magnet structure for a linear actuator in which a flat, rectangular coil armature may be moved with a force constant that varies less than 2% over the entire distance of its movement. The magnet structure comprises two pair of magnets 10U and 10L, an upper steel plate 11U, a lower steel plate 11L, and two steel side bars 13 and 14. A copper plate (not shown) may be attached to the inner surface of one of the steel plates 11 to reduce eddy currents.