Transcription of Design Notes on Precision Phase Locked Speed …
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Design Notes on Precision Phase Locked Speed …
U-113 APPLICATION NOTEDESIGN Notes ON Precision Phase Locked SPEEDCONTROL FOR DC MOTORSABSTRACTT here are a number of high volume applications for DCmotors that require Precision control of the motor s Locked loop techniques are well suited to providethis control by Phase locking the motor to a stable andaccurate reference frequency. In this paper, the small sig-nal characteristics, and several large signal effects, ofthese loops are considered. Models are given for the loopwith Design equations for determining loop bandwidth andstability.
(5) APPLICATION NOTE U-113 For this loop, note that there are two poles in the re-For this motor, the model capacitor, CM, is calculated us-sponse at DC, i.e., s = 0.
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