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Investigation of fault-tolerant capabilities of some recent multilevel inverter topologies.
- Source :
-
International Journal of Electronics . Nov2021, Vol. 108 Issue 11, p1957-1976. 20p. - Publication Year :
- 2021
-
Abstract
- In this paper, some recently proposed multilevel power converters are investigated for their fault-tolerant capabilities and improved reliability. These reported topologies are generally reduced device multilevel inverter (RD-MLIs) configurations that cannot tolerate switch failures due to absence of redundant states. Present work therefore aims to incorporate open-circuit fault-tolerant capability by adding few redundant states in switching sequences of existing topologies. The work in this paper objectively presents two existing topologies of five-level and seven-level Multi-Level Inverters (MLIs) modified for fault-tolerant (FT) capability against single switch open-circuit (OC) faults. The modification for fault-tolerant feature (FT-MLI) has intrinsic self-voltage balancing capability, low cost and control simplicity. The modified FT-MLI uses multi-carrier sinusoidal pulse-width modulation (SPWM) technique to generate control switching pulses as per desired switching sequences. Simulation and experimental results of these modified FT-MLI topologies under healthy, faulty and post-fault mode are presented and discussed. Experimental results verify the feasibility and effectiveness of these modified FT-MLI topologies which are suitable for safety-critical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00207217
- Volume :
- 108
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- International Journal of Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 153951083
- Full Text :
- https://doi.org/10.1080/00207217.2020.1870752