MOTOR CONTROLLER

摘要

An electric motor control device is provided that controls an electric motor for driving a movable part of a machine through a transfer mechanism. When receiving a torque command as an operation command signal (9), a servo device (3) supplies an electric motor (5) with an input torque signal (12) corresponding to the operation command signal (9) to drive an electric motor (5). Consequently a movable part (7) operates to produce vibrations. The servo device (3) produces an input torque signal (12) equivalent to an input torque signal (11), and stores it together with a rotational speed signal (10) in a memory (2). An analyzer (1) carries out frequency analysis of the input torque signal (11) and the rotational speed signal (10) using FFT, and outputs the results of analysis (14).