Method for determining characteristic values, particularly of parameters, of a centrifugal pump aggregate driven by an electric motor and integrated in a system
AssigneeGrundfos Management A/S
InventorCarsten Skovmose Kallesøe
Life of this patent
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Abstract
A method for determining characteristic values of an electrometrically driven centrifugal pump assembly with a speed controller, said assembly being integrated in an installation, includes determining characteristic values by way of electrical variables of the motor and of the pressure produced by the pump, with which one successively runs to at least two different operating points of the pump. Delivery rates are determined in the installation at the run-to operating points, and the characteristic values are determined based on the delivery rates.
Claims15
A method for determining characteristic values of an electromotorically driven centrifugal pump assembly with a speed controller, the assembly being integrated in an installation, the method comprising:
- successively running at least two different operating points of a pump;
- and
- determining characteristic values by way of electrical variables of a motor or a speed controller, and of a pressure produced by the pump, wherein delivery rates are determined on an installation-side at run-to operating points, the characteristic values being determined based on the delivery rates;
- wherein a function determining the delivery rate comprises at least one term with a hydraulic or electrical power-dependent variable, and a second term with a hydraulic or electrical power-dependent variable, which in each case are linked to a parameter in a multiplicative manner.
Dependencies are inferred from the claim text.