MOTOR CONTROLLER

摘要

PROBLEM TO BE SOLVED: To suppress shock generated at the time of switching a position detection device used for controlling the position of a motor.SOLUTION: A motor controller 2 has: a position control part 10 for generating a speed command Vr on the basis of a position deviation between a position command Pr and a position feedback signal; a switching part 14 for switching the position feedback signal inputted in the position control part 10 from a first position signal Pfb 1 detected by a laser length measuring device 6 to a second position signal Pfb 2 detected by a position sensor 8; and a phase compensation part 15 for compensating delay of the phase with respect to the first position signal Pfb 1 of the second position signal Pfb 2 which is switched by the switching part 14.