| 摘要 |
A servo-drive system for feedback-based control of motion and positioning of a motor, comprises a current measurement device configured to obtain a measure of current being drawn by said drive motor, therefrom to provide feedback; the current having an operating range, the operating range comprising a relatively large current range for acceleration but remaining within a relatively smaller current range for steady state operating of the motor. The current measurement device has a first, coarse, sensor optimized for measuring said relatively large current range and a second, fine, sensor optimized for measuring said relatively smaller current range, thereby to maximize accuracy for feedback during the steady state operation. |
