| 摘要 |
PROBLEM TO BE SOLVED: To provide a position control system capable of absorbing lost motion and performing accurate position control. SOLUTION: This system is provided with an AC signal generation means 7 for generating AC signals provided with the amplitude of a prescribed size in the case that the absolute value of a torque command value is small and reducing the size of the AC signals in the case that the absolute value of the torque command value is large, the AC signals Tadd generated from there are added to the torque command value Tcom obtained from a position command value Xcom and an added torque command value Tcom1 is generated. Current command values Iucom, Ivcom and Iwcom are generated by a three- phase division means 6 from the Tcom1. Thus, the lost motion is absorbed and the oscillation of an electric motor and the resonance of a machine system are prevented. |
