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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. 14 figs.
Inventors:
Issue Date:
OSTI Identifier:
187068
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 420200; PA: EDB-96:038536; SN: 96001532323
Patent Number(s):
US 5,483,841/A/
Application Number:
PAN: 8-274,738
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 16 Jan 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; VALVES; ACTUATORS; ON-LINE MEASUREMENT SYSTEMS; MONITORING; ELECTRIC CONTROLLERS; OPERATION; SWITCHING CIRCUITS; ELECTRIC POTENTIAL