Patent ID: 7075196

Claim:
An integrated motor- and position sensor comprising: a linear motor comprising a platen assembly including a planar portion having a plurality of evenly spaced linearly projected teeth, and a forcer assembly planarly spaced from the platen assembly and having a plurality of linearly projecting forcer poles, the forcer poles each having a plurality of forcer teeth projecting parallel to the platen teeth, coils for electrically energizing the forcer poles, the coils adapted to generate driving magnetic flux in response to driving current provided to the coils, the driving magnetic flux generating force between the platen assembly and the forcer assembly, and a plurality of sensing coils placed to intercept at least a portion of the driving magnetic flux between a plurality of the forcer poles and a plurality of platen teeth, the plurality of sensing coils generating an output sensing coil signal responsive to the driving magnetic flux and the relative position or movement between the platen assembly and the forcer assembly.