Importance

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Abstract

There is disclosed a low mass, low inertia, low inductance armature motor having infinite point resolution and a high force to mass ratio. The basic configuration is a plurality of phase displaced armature windings 90.degree. phase displacement for even spaced increments and optimized linear force preferably on a non-conductive, non-magnetic substrate and sandwiched between an incremental, alternately polarized magnetic field or castellated single polarity pole structure. Each of the phase displaced windings is preferably driven by a simplified totem pole type switching circuit. As a result of the low mass, low inertia, low inductance construction of the armature, greater than one thousand start/stop operations per second are made possible with a high force to mass ratio to permit driving and positioning of loads such as thermal print head drives for line printers, thin film read/write head positioners for both solid and floppy disk memory systems, pen positionings for high speed chart readouts, drives for focal plane shutters and cameras, etc. and the capability of being driven in a loop continuously by terminating the multiple phase windings of the armature at conductor ends on lateral edges of the substrate which may be flexible or rigid.

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First Claim