Method and apparatus for monitoring motor operated valve motor o

Details Method and apparatus for monitoring motor operated valve motor o Method and apparatus for monitoring motor operated valve motor o

1994-07-18

1996-01-16

Chilcot, Richard

Measuring and testing

Dynamometers

Responsive to torque

7386217, 738659, G01M 1900, G01P 1300

Patent

active

054838410

ABSTRACT:
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.

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Gielissen et al, "A Method for Measuring Torque Oscillations in Rotating Electrical Machines", International Conference on Electrical Machines, Athens, Greece 15-17 Sep. 1980.
Application Data-AC *MG 1-14.35 Effects of Unbalanced Voltages on the Performance of Polyphase Induction Motors.
Electromechanical Devices for Energy Conversion and Control Systems.

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