Variable speed integrator
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United States of America Patent
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Jun 16, 1987
Grant Date -
N/A
app pub date -
Nov 1, 1983
filing date -
Nov 1, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable speed integrator for controlling the response time of a valve which regulates the amount of coolant flowing to a heat exchanger so as to control the temperature of the cooled substance output from the exchanger. The temperature of the cooled substance is sensed and compared to a set point temperature to determine an error temperature representing the difference between the sensed and set point temperatures. The error temperature is integrated by the variable speed integrator, the output of which is used to drive the valve into position. The control system monitors the rate of change of the sensed temperature to determine a low system gain. When the rate of temperature change indicates a low gain system, the gain of the integrator is increased to decrease the response time of the valve.
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