Movement detector for a stepping motor
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United States of America Patent
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Aug 24, 1982
Grant Date -
N/A
app pub date -
Jun 23, 1980
filing date -
Jun 21, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A feed arrangement enabling detection of the movement of a stepping motor d providing such motor with a series of long duration pulses in the event of failure to step responsive to a short duration pulse. The detector comprises means for sampling a first signal developed by the current in the motor winding and generating a second signal which is the integral of the first, in order to detect whether or not the motor has stepped. The invention is intended for use with micromotors as found in timepieces.
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