A comparison of informative value of motor current and power spectra for the tasks of induction motor diagnostics

In the article a theoretical basis of induction motor diagnostic methods based on motor current and motor power consumption spectra analysis is presented. Equations, describing current and power curves of motor working with most frequently caused damage types, were shown. A comparison of informative values of these signals has showed that power consumption signal contains greater number of diagnostic features, and their numeric values allows clearer recognition of damage feature in signal spectra.