Patent ID: 8872449

Claim:
A distributed-arrangement linear motor in which a stator and a movable member are arranged to be relatively movable, and a plurality of stators are arranged separately in a direction of the relative motion, wherein the stator and the movable member respectively have periodic structures in which plural kinds of poles of the stator and the movable member which magnetically act each other and arranged periodically subsequently in an order according to the arrangement in a direction of the relative motion therebetween; a distance between adjacent stators is not more than a length of the movable member in the direction of the relative motion; the pole of the stator or the pole of the movable member is formed of a coil; a current control unit that controls current to be supplied to the coil based on the distance between the stators, wherein the current control unit is configured to calculate a phase of the current to be supplied to the coil based on the distance between the stators, is further provided; and either one of the poles of the stator and the movable member is composed of a permanent magnet for driving a position detector, which detects a position of the permanent magnet for driving and calculates a position thereof, is provided for the stator or movable member on the coil side, and a position information switch for switching signals from a plurality of position detectors, wherein the current control unit controls current to be supplied to the coil based on the signal from the position information switch and the distance between the stators.