Actuation system with step motor
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United States of America Patent
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Apr 23, 2013
Grant Date -
Dec 8, 2011
app pub date -
Feb 18, 2011
filing date -
Feb 18, 2010
priority date (Note) -
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Abstract
The actuation system including a control system, an actuator comprising a drive part and a step motor comprising a rotor and a stator with at least one electric phase, an actuated system comprising a controlled element coupled to the drive part, and an elastic part capable of generating an elastic return force on the rotor of the motor or on the drive part. The control system comprises means for measuring an induced electric parameter on the phase of the stator after switching off the current of said at least one phase of the stator to detect a return of the rotor resulting from elastic return force when a mechanical clearance is overtaken.
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