In medium and high-power applications, multilevel inverters (MLIs) are becoming popular due to their low harmonic distortion and reduced voltage stress across switches. Multilevel inverter topologies rely heavily on the reliability of semiconductor devices. In this paper, a new fault-tolerant multilevel inverter topology has been proposed which can work in a different mode of operation with different open-circuit fault (OCF) conditions with the addition of six auxiliary switches to the main circuit which comprises of seven switches and three dc voltage sources. Based on the voltage magnitude of dc voltage sources, proposed FT-MLI topology can be operated in different modes of operation which has been explained in this paper. Further, a fault analysis has been carried out for single and multi-switch OCFs. Finally, simulation results for different fault scenarios have been presented and results have been summarized.
A Fault-Tolerant Multilevel Inverter (FT-MLI) Topology for Electric Vehicle Applications
2023-11-28
1283601 byte
Conference paper
Electronic Resource
English