Process and device for feedback-controlling rotary machines
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United States of America Patent
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N/A
Issued Date -
Mar 27, 2003
app pub date -
Aug 19, 2002
filing date -
Aug 22, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention relates to a process and device for feedback-controlling the speed of an electric motor (10) driving a rotary machine (6), in particular a pump or fan, according to the capacity requirement at the rotary machine, which is variable with time on the consumer side (4, 8) thereof, using a feedback controller (16) the output of which determines the speed of the electric motor (10). The process according to the invention is characterized in that the electrical power (P) actually taken up by the electric motor (10) is measured and in that a signal representing the electrical power measured is produced and supplied as input to the feedback controller (16), where it is converted into the desired output according to a predetermined or right then calculated characteristic curve (P.sub.install(Q)).
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