Time constant automatic estimation method, time constant automatic estimation apparatus and servo motor control system

摘要

A time constant automatic estimation apparatus for automatically estimating a time constant at a time of acceleration of a servo motor including: an electric current value detection section for detecting a peak electric current value when the servo motor is operated in acceleration using a provisional time constant provided in advance for a test operation; and a time constant estimation section for estimating a actual time constant when the servo motor is actually driven at a desired target electric current value at a time of an actual operation, from a relation between the peak electric current value and the provisional time constant.