Linear pulse motor

摘要

A linear pulse motor which includes: a primary magnetic flux generating unit composed of a pair of cores each having a coil wound therearound and a plurality of magnetic poles provided at end portions thereof; and a scale having a row of first teeth formed therein along a direction of relative travel thereof with respect to the magnetic flux generating unit, the scale and the flux generating unit being disposed so that the scale relatively moves with respect to the primary magnetic flux generating unit by generating magnetic flux between gaps formed between the magnetic poles and the teeth facing to the magnetic poles. The magnetic flux generating unit includes a spacer through which the cores are jointed in a parallel manner. Each core has a pair of arms and a substantially U shape, the core being provided on each end of the arms thereof with the magnetic pole. The magnetic flux generating unit is disposed with respect to the scale so that the cores are placed in one of both a direction parallel to and a direction perpendicular to the row of teeth.