Fault Tolerance of the Neutral Point Clamped based Inverter Driven Nine Phase Induction Machine under Switch Fault Condition

Abstract

Due to their inherent advantages, multi-phase induction machine drives (IMD) are used in high-power applications. The spatial harmonic content in an IMD is substantially lower with a higher number of phases, which also lessens torque pulsations. On the other hand, to reduce the time-harmonic content and enhance the torque profile, multi-level inverters with a greater number of switches are used. Yet, as more switches are used in a multi-level inverter, the likelihood of switch failure instances increases. Consequently, it's crucial to successfully use the IMD even while it's malfunctioning. In this paper, a fault-tolerance method for a nine-phase IMD driven by a neutral point clamped based inverter is presented. With the use of ANSYS Maxwell 2-D software's finite element method study, the effectiveness of the suggested strategy has been confirmed.