Method and apparatus for high speed stepper motor stall detection
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United States of America Patent
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Oct 12, 2010
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app pub date -
Jan 3, 2008
filing date -
Jan 3, 2008
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Abstract
A detector device and a method for detecting a stall condition in a stepper motor, wherein the accumulated value of the back EMF is compared to a stall threshold when the stepper motor has exceeded a pre-determined rotational velocity threshold, the accumulated value of the back EMF representing a condition of the stepper motor, specifically a failure of the accumulated back EMF value to exceed the stall threshold indicating a stall condition of the stepper motor.
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