EVALUATION OF THE INDUCTION MOTOR CONDITION BASED ON COHERENCE FUNCTION

Abstract

Frequency analog of correlation coefficient of two random processes, i.e. the coherence function has been used for statistical power evaluation of the linear connection of the state variables of the induction motor. Analysis of the calculated coherence function values with using the smoothed correlation functions and averaging over the group of processes implementation allowed us to conclude about the reasonability of using a time window bounded by quarter period of the input voltage to produce significant differences in the work of linear, close to linear and nonlinear systems.