Method for controlling AC linear motors, device for driving AC linear motors, and system of AC linear motors

Abstract

Provided is a method for controlling a plurality of AC linear motors of identical specifications which are connected each other and operated synchronously so that they appear to operate as a single linear motor having desired power. The method for controlling, as an AC linear motor set, a plurality of AC linear motors of identical specifications which are connected to each other, includes the steps of firmly connecting the AC linear motors in such a manner that pole pitches of movers of the AC linear motors and pole intervals of adjacent movers are identical; and setting any one of the AC linear motors to be a master AC linear motor and using a command signal generated based on a feedback signal of the master AC linear motor and current difference information obtained by comparing phase current of the master AC linear motor with phase current of another AC linear motor to control the AC linear motor set.

Dependencies are inferred from the claim text.