eccentricity fault diagnosis studying for a round rotor synchronous machine

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.