Direct drive servovalve device with redundant position sensing and methods for making the same
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United States of America Patent
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Feb 8, 2011
Grant Date -
Nov 10, 2005
app pub date -
May 4, 2004
filing date -
May 4, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A direct drive servovalve device includes (i) a servovalve motor having a stator and a rotor assembly configured to rotate relative to the stator, (ii) a valve member coupled to the rotor assembly, and (iii) a sensor assembly. The sensor assembly includes an interface configured to couple to a controller that controls the servovalve motor, a set of programmable Hall sensors coupled to the interface, and a support. The support (e.g., a ring-shaped collar or sleeve) supports the set of Hall sensors at an installation location which is (i) adjacent to the rotor assembly and (ii) fixed relative to the stator. The set of programmable Hall sensors is configured to provide a set of position signals to the controller through the interface. The set of position signals identifies a rotational position of the rotor assembly relative to the stator.
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