Direct drive servovalve having redundant drive motors
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United States of America Patent
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Jan 6, 2015
Issued Date -
N/A
app pub date -
Jul 14, 2010
filing date -
Jul 14, 2009
priority date (Note) -
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Abstract
A direct drive servovalve (10) includes redundant drive motors (14) coupled to a common valve drive shaft (22,24) by a connection device (26). The connection device (26) is configured to allow operation of the servovalve (10) in the case where one or more of the drive motors (14) becomes inoperable, such as caused by jamming or binding of a rotor associated with the drive motor. By use of the connection device (26), in the event that one of the drive motors (14) was to become jammed, the remaining operable motors (14) can continue to stroke or cause translation of a valve member (18) of the direct drive servovalve (10) to allow its continued operation.
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