Patent ID: 6211640
Filing Date: 2001-04-03
Classification: H02P

Abstract:
A motor drive control system in which a motor drive unit receives an input drive control instruction signal to drive a motor and a load connected thereto under controlling the motor drive, said motor drive control system comprising:a white noise generator generating a white noise;an instruction selecting unit for selecting one of the input drive control instruction signal for normal control operation and the white noise generated by the white noise generator for frequency characteristic operation, as a control instruction data signal;a controller controlling a motor drive using the control instruction data signal output of said instruction selecting unit;a sampling unit sampling data representing a driving state of one of the motor and the load at a predetermined sampling period to generate sampled data;a first Fourier transformer for Fourier-transforming the control instruction data output of said instruction selecting unit together with the sampled data obtained by said sampling unit; anda first frequency characteristic operation unit for calculating frequency characteristics in a range from the control instruction data to the sampled data based on output data of said first Fourier transformer.