LINEAR MOTOR DRIVE DEVICE

摘要

A linear motor drive device for driving a linear motor, comprising: a fixed section provided with a magnet row composed of a plurality of rectilinearly arranged permanent magnets and two rails arranged on both sides of the magnet row and parallel to the magnet row in order to support and guide a mobile section; and a mobile section provided with two bearings that are supported by and are capable of moving in sliding contact with the two rails, respectively, and an armature arranged between the two bearings so as to face the magnet row in close proximity, wherein a d-axis current control circuit in a current control circuit for generating and controlling a d-axis current and q-axis current fed to the coil of the armature is provided with a configuration for varying the generated d-axis current and controlling the frictional force produced between the rails and the bearings.