Aktiebolaget Skf

Skf USA Inc.

Ernesto Wiedenbrug

Sang Bin Lee

Matthew Barber Sanford

A portable test device () can be configured as a rotor conductivity anomaly tester, a magnetic core anomaly tester, or a rotational eccentricity fault tester for a multiphasic motive force electrical machine () by providing an immotive multiphasic motive force electrical machine test signal from a plurality of multiphasic motive force electrical machine signal generators () through a detachable electrical power connectivity () and by having a multiphasic motive force electrical machine fault analyzer () that can sense responses and discern the existence of a fault. Control of the test signal can be accomplished by an immotive multiphasic test signal controller () that varies frequency and achieves incremental movement or to achieve stator magnetization plane angle changes or movement that tests angular relationships.

Portable system for immotive multiphasic motive force electrical machine testing

A method for identifying root cause failure in a multi-parameter self learning machine application model is presented. At least one multi-function sensor having the capability to measure at least one of a voltage and current of the machine application model is provided. The method includes measuring voltages and currents of a multi-phase load with the multi-function sensors in a passive manor and calculating at least one of a time-varying variable KW, PF, kVAr, or Z out of the measured voltages and currents. The method further provides calculating a first, second or third order derivative of the time-varying variable and classifying segments of at least one of the time-varying variables depending on a state. Then, a step of choosing at least one of the variables and learning their normal behavior is undertaken. Finally, normal behavior is compared to a pattern difference and a root-cause meaning to the pattern difference is identified.

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Fort Collins, CO, United States of America

Ernesto Wiedenbrug