Inter-Turn Fault Diagnosis of Induction Motor Fed by PCC-VSI Using Park Vector Approach

Induction motors (IM's) are the workhorses of industries, due to its robustness as well as reliability. The diagnosis of incipient interturn short circuit fault (ITSCF), aims to detect the fault at an early stage, and thus prevent unwanted downtime and high maintenance cost. However, ITSCF of inverter-driven induction motor requires careful investigation as it is subjected to harmonics and the thermal stresses, which lead to insulation deterioration of stator windings. In this work an analytical model of induction motor with ITSCF fed by predictive current control-voltage source inverter (PCC-VSI has been developed. The parks vector approach (PVA), and the patterns generated by them has been examined for diagnosis of early fault. The experimental results show the applicability and effectiveness of the PVA, to detect the fault at an incipient stage for drive-fed induction motor.