| 摘要 |
PROBLEM TO BE SOLVED: To eliminate torque ripples in an AC servo motor resulting from a current command held at zero degree. SOLUTION: A linear function generator 7 outputs the value of linear function at the present time as a current command value to a current controller 2 based on a linear function generated by combining the current command value at the present sampling time outputted from a current command value generator with specified sampling cycles with an estimated voltage command value at the next sampling time outputted from an estimated command current value calculator 8. For this reason, a current command for driving an AC servo motor 3 can be approximated to an ideal current command, and thus the revolution of the AC servo motor can be made smooth with torque ripples reduced. |
