Process for determining a reference characteristic for controlling a pump
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United States of America Patent
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Jul 6, 2004
Grant Date -
Feb 27, 2003
app pub date -
Aug 2, 2002
filing date -
Aug 22, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In the process according to the invention for determining a nominal values curve of an installation (H.sub.installation (Q), P.sub.installation (Q)) for controlling the pump capacity of a pump (6) driven by an electric motor (10) with speed control in a closed system with variable capacity requirement, first all consumers in the installation are closed, one consumer operation parameter is determined at a consumer (4-n) arranged at a distance from the pump, the pump capacity is varied until the consumer operation parameter has reached a predetermined value, and, once this value has been reached, a pair of pump parameters representative for the instantaneous pump capacity is determined and stored in the controller. This measurement is repeated with different consumers being open, and from the stored values of the pairs of pump parameters the curve of nominal values (H.sub.installation (Q), P.sub.installation (Q)) of the installation is calculated by way of a mathematical process for establishing a curve.
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