A new analytical model dedicated to diagnose the rolling bearing damage in induction motors - simulation and experimental investigation -

This paper proposes a new analytical model for mechanical fault detection in induction motors. Rolling bearing fault has an important percentage compared to others. Most research works focus on rolling bearing faults analysis, the originality of our study relies on the preparation of a new simulated model under rolling bearing faults. First of all, the calculation of the mutual inductances between the stator and the rotor based on modified winding function approach (MWFA) which we will present by a new proposal. The simulation of different electromagnetic variables (speed, torque, current) under outer raceway damage validates our analytical study. Motor current signature analysis (MCSA) is a common practice in industry to diagnose motor faults. We will also present the spectrum of stator current to verify the characteristic frequencies; this verification indicates the accuracy of the model. The experimental results show the effectiveness and the correspondence with the proposed model.