| 摘要 |
PURPOSE:To facilitate numeric processing in the control by digitally controlling each phase current value of an AC servo motor. CONSTITUTION:Each phase current value of an AC servo motor 24 is detected through a current detector 25 and subjected through an A/D converter 26 into A/D conversion and then digitized through a DC current converter 27 based on rotational position information of motor obtained through a motor rotational position detector 28. Difference from a current command value is then fed to a current control circuit 21 which produces a digitized output current value. A three-phase AC current converter 22 converts the DC output current value into a three-phase AC output current value based on rotational position detection information of motor fed from the rotational position detector 28 for motor and then the three-phase AC output current value is subjected through a D/A converter 23 to D/A conversion and fed to each phase of the AC servo motor 24. |
