Assessment of approaches for technical diagnostic of pump faults with induction motor as transducer

The centrifugal pump is an important component in industry and its failure and repair are associated with high cost. These cost can be reduced by technical diagnostics. Besides the additional monitoring of the pump and the motor, there is the approach of using the motor as a sensor. In this case the current and voltage signals of the motor are used for the diagnosis of both components. The extension of the known approaches from motor diagnostics for pump faults is currently subject of the research. It is not known whether these approaches can be used to recognize the conditions healthy, cavitation, hydraulic blockage and dry running or which approach delivers the best classification result. In order to clarify this several experiments with a pump on a test bench are conducted.