Reset windup limiting
AssigneeHoneywell Inc.
InventorRoyal R. Hawkins
Life of this patent
Estimating the term…
Abstract
A proportional control system for controlling a condition at a setpoint is disclosed wherein the system has reset for substantially reducing system droop and incorporates reset windup limiting, the system having a setpoint apparatus for establishing the setpoint for the system, a feedback circuit for supplying a feedback signal in accordance with the condition, a reset circuit connected to both the setpoint apparatus and the feedback circuit for substantially reducing system droop, the reset circuit for supplying a reset output signal, and the reset circuit having a reset windup limiting circuit for limiting reset windup of the reset circuit.
Claims16
A proportional control system for controlling a condition at a setpoint, said system having reset for substantially reducing system droop and having reset windup limiting comprising:
- setpoint means for establishing said setpoint for said proportional control system;
- feedback means for supplying a feedback signal in accordance with said condition, said condition being controlled by a load;
- reset means being connected to both said setpoint means and said feedback means for substantially reducing said system droop, said reset means having an output for supplying a reset output signal,
- reset windup limiting means connected to said output of said reset means and to said feedback means so that said reset output signal is limited to a value that differs from said setpoint by a predetermined increment;
- and
- means connected to said reset means and adapted to be connected to said load for controlling said load in accordance with said reset output signal.
A proportional motor speed control system for controlling the speed of a motor at a setpoint, said system having reset for substantially reducing system droop and having reset windup limiting comprising:
- setpoint means for establishing said setpoint for said proportional motor speed control system;
- feedback means for supplying a feedback signal in accordance with the speed of said motor;
- reset means being connected to both said setpoint means and said feedback means for substantially reducing said system droop, said reset means having a reset output for supplying a reset output signal,
- reset windup limiting means connected to said output of said reset means and to said feedback means so that said reset output signal is limited to a value that differs from said setpoint by a predetermined increment;
- and
- means connected to said reset means and adapted to be connected to said motor, said speed of said motor being controlled in accordance with said reset output signal.
Dependencies are inferred from the claim text.