Mechanical vibration analysis of induction machine under dynamic rotor eccentricity

This paper analyzes the mechanical vibration frequency spectra of a healthy squirrel cage induction machine and the identical machine operating under the dynamic rotor eccentricity. Radial vibrations are evaluated based on the experimental data in no-load and nominal load steady state operations. The main attention is paid to the rotational frequency and twice line frequency vibration components. Necessity of further study is pointed out.