POSSIBILITIES OF ROTOR ECCENTRICITY DIAGNOSTICS FOR CAGE INDUCTION MOTORS - NUMERICAL STUDIES

Abstract

In this paper, two methods of quantitative estimation of eccentricity degree for induction motors on the basis of numerical analysis of standard Fourier spectrum are presented. These spectra are results of the solution of so called circuit models of machines described in symmetrical components based on balance harmonic method. The first method is based on separation spectrum current to four characteristic sets of frequency. In the second method, the spectrum is not separated. It is estimated by using artificial neural network. To illustrate the above methods, exemplary computation results of stator currents for chosen motors are presented. In the paper the package of computer programs for numerical computation, as well as initial verification of the obtained solutions are presented.