Patent ID: 7868577
Filing Date: 2011-01-11
Classification: G05D,H02P

Abstract:
1. An electric motor control apparatus comprising: position control means that receives a position command signal specifying a target value of position of an electric motor driving a load machine and a position signal indicating position of the electric motor, and outputs a velocity command signal specifying target value of velocity of the electric motor; velocity control means that receives the velocity command signal and a correction velocity signal, obtained by adding a velocity signal, indicating the velocity of the electric motor, and a velocity correction signal, to correct the velocity signal, and outputs a torque command signal specifying target value of torque of the electric motor driving the load machine; and vibration suppression means that receives an acceleration signal to indicating acceleration of the load machine or acceleration of the load machine on which a low-pass filter and a high-pass filter are made to act, outputs the velocity correction signal, and sets a transfer function from the acceleration signal to the torque command signal to a transfer function obtained by multiplying a transfer function from the position signal to the torque command signal by a proportion characteristic and an integration characteristic.