Proportional motor drive control
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United States of America Patent
Stats
-
Aug 26, 1986
Issued Date -
N/A
app pub date -
Jun 9, 1983
filing date -
May 22, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An air conditioning control system has inputs for room temperature and air velocity voltage signals. Both signals are scaled and compared to determine which signal is larger, and the magnitude of the difference. The control circuit drives a variable speed damper motor in a direction determined by the greater of the two scaled input signals. The motor is driven at a rate proportional to the magnitude of the difference between the two signals. Means for setting the maximum and minimum open damper positions are provided within the control circuit.
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