A signal processing approach to modeled bearing faults detection in electric system

The consequences of mechanical defects are generally manifested at the level of the air gap by the displacement of the center of the rotor with respect to the stator, thus a defect of eccentricity or the length of the air gap is uniform which has an effect on the distribution of the flux density of the air gap and thus influences the parameters which depend on it. This paper presents the study of the frequency distortion of the electromagnetic torque of an electrical system in the presence of bearing defects. A brief explanation of the modeling of the system will be made. The influence of defect with low energy on the electromagnetic torque is analyzed and its oscillations are explained considering the interaction between the stator and the rotor fundamental and harmonic currents.