Modeling and Simulation of Open Phase Stator Winding Fault in Pentagon connected Five Phase Induction Motor Drive using Back-EMF

This paper is aimed at the analysis of operation of five phase induction machine (FPIM) with one stator phase winding open. It presents different parameters of the machine with stator winding connected in pentagon configuration. Back-EMF approach is adopted for the modeling of fault and the same is simulated in MATLAB-SIMULINK environment. The primary objective is to build a mathematical model for the simulation of the motor drive system in the aforesaid fault condition and to apply a suitable fault tolerant control strategy (FTCS) that reduces the ripple in the electromagnetic torque post fault condition. Reference currents for hysteresis controller are obtained by modifying the x-y components after fault occurrence without affecting the indirect field oriented control (IFOC). A quantitative analysis on electromagnetic torque ripple under healthy, during fault and post fault conditions is presented along with the percentage derating. The simulation results obtained are in accordance with the conditions that are pertaining to the fault. This strategy can be applied to pentacle configuration as well.