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Title: Method and apparatus for monitoring motor operated valve motor output torque and power at valve seating

A method and apparatus are provided for monitoring a motor operated valve during the brief period when the valve seats and the torque switch trips to deenergize the valve motor. The method uses voltage measurements on the load side of a deenergizing switch that opens to deenergize the motor to determine, among other things, final motor rotational speed and the decelerating torque at motor deenergization.
Inventors:
 [1]
  1. (Oak Ridge, TN)
Issue Date:
OSTI Identifier:
870254
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5483841
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; monitoring; motor; operated; valve; output; torque; power; seating; provided; brief; period; seats; switch; trips; deenergize; voltage; measurements; load; deenergizing; determine; final; rotational; speed; decelerating; deenergization; output torque; valve seat; voltage measurement; rotational speed; voltage measurements; operated valve; motor operated; valve seats; brief period; /73/