G - Physics – 05 – D
Patent
G - Physics
05
D
318/25, 341/97
G05D 3/16 (2006.01) G05B 11/18 (2006.01) G05B 19/23 (2006.01)
Patent
CA 1277365
ADVANCED MOTOR CONTROLLER ABSTRACT OF THE DISCLOSURE A controller for close positioning or modulating control of an electric motor is disclosed. The controller compares a signal representative of the demand on the system with a signal representative of the actual position of the motor or a valve associated therewith, and if the difference between the signals exceeds a "deadband" and no action has been taken within a first time interval, and if the last movement of the valve was in the same direction and a second time interval has elapsed, a motor run pulse is generated. If the last movement of the valve was in a direction opposite to that desired, the motor run pulse is extended to overcome "backlash" resulting from the reversal of motor rotation.
544917
Dziubakowski Donald J.
Kristoffersen Erik P.
Teer Ronald J.
Babcock & Wilcox Company The
Dziubakowski Donald J.
Kristoffersen Erik P.
Ridout & Maybee Llp
Teer Ronald J.
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