Eccentricity Fault Diagnosis Studying for a Round Rotor Synchronous Machine

Document Type: Research Paper


1 Faculty of Electrical Engineering, ShahidRajaee Teacher Training University, Tehran, Iran

2 2Faculty of Electrical Engineering, Islamic Azad University of Borujerd , Borujerd, Iran


The paper presents a mathematical base modeling combined to Modified-Winding -Function-Approach (MWFA) for eccentricity fault detection of a round-rotor synchronous machine. For this aim, a 6-pole machine is considered, and the machine inductances are computed by MWFA in healthy and also under eccentricity fault. A numerical discrete-time method has been proposed to machine modeling in voltage-fed case, and an exact analytical method is proposed to calculate the machine's currents and torque. A method is introduced for both static and dynamic eccentricity fault diagnosis, which is proposed for first time.  A mathematical base method is introduced for machine modeling, and new results are obtained to a novel method addressing for eccentricity fault diagnosis. The method is validated by Finite-Element-Method (FEM) so accuracy of the proposed method is proofed.