Method and devices for driving a damper
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United States of America Patent
Stats
-
Jul 22, 2014
Grant Date -
Oct 7, 2010
app pub date -
Apr 5, 2010
filing date -
Apr 6, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An actuator (1) comprises an electrical motor (10) for driving a damper (3) from a rest position to a stalled position. The damper (3) is biased toward the rest position with at least one spring. A control module (2) is configured to supply, upon activation of the actuator (1), a drive current to the electrical motor (10) for driving the damper (3) from the rest position to the stalled position against a bias force produced by the spring. The control module (2) is further configured to reduce the drive current to a lower level for maintaining the damper (3) in the stalled position when a defined duration of time has elapsed since activation of the actuator (1). Damages to the electrical motor (10) and/or gear trains can be avoided without having to provide any circuitry or sensory equipment for measuring the drive current.
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