Method and device for controlling a stepping motor by interrupting its drive pulse
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United States of America Patent
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-
Jan 18, 1994
Grant Date -
N/A
app pub date -
Nov 1, 1991
filing date -
Nov 7, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device for controlling a stepping motor having a coil and a rotor with a permanent magnet magnetically coupled to the coil. A drive pulse is applied to the coil each time the rotor has to turn by one step, and a representation of the quantity of mechanical energy supplied by the motor is measured during this drive pulse. The instant when the representation of the mechanical energy passes through its maximum value is detected, and the drive pulse is interrupted at this instant. The method and device increase the operating reliability of the stepping motor.
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