Method for Detecting a Fault, in Particular an Impeller Blockage, in a Centrifugal Pump, and Centrifugal Pump
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United States of America Patent
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Issued Date -
Oct 17, 2024
app pub date -
Aug 15, 2022
filing date -
Aug 15, 2022
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Abstract
A method for identifying a fault in an impeller blockage in a centrifugal pump includes a determining step and a calculating step. The determining step includes determining the fault frequency fr,pump of at least one fault-indicating harmonic of a motor current on the basis of a fault model, wherein the centrifugal pump has a three-phase drive motor. The calculating step includes calculating a harmonic amplitude îf of the motor current for the at least one determined fault frequency fr,pump by transforming the three-phase motor current into a dq current coordinate system that contains currents id and iq and rotates at the fault frequency fr,pump. A geometric sum of direct components of the currents id and iq in the dq current coordinate system corresponds to the harmonic amplitude îf.
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