Disturbance-free operation of five-phase induction machine with one stator winding open circuited

A disturbance free operation method of five-phase induction machine with one stator winding opened is presented in this paper. The four healthy phase currents are derived by keeping stator magnetomotive force unchanged when a stator winding opened. Based on symmetrical component method and equivalent circuits of five-phase induction machine, voltage of the four healthy phases, which is supply to the fault machine, is obtained. The torque and rotor speed are not changed remarkably, and the currents of four healthy phases are controlled in balance. The presented method is verified by simulation results.