| 摘要 |
The present invention relates to an AC servo motor control is disclosed, in which a voltage command is produced from the deviation between a current command and feedback current for the AC servo motor control according to the voltage command thus produced. Whenever the voltage command becomes zero, feedback-current data is collected for a predetermined period of time. Offset amount is calculated for updating according to the collected feedback-current data. Subsequently, the feedback current is corrected by using the new offset amplitude during revolution of the AC servo motor. A voltage command to the AC servo motor is produced according to the deviation between the current command and the compensated feedback current.
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