Investigation of Fault-Tolerant Capabilities in an Advanced Three-Level Active T-Type Converter

A novel fault-tolerant three-level power converter topology, named advanced three-level active T-Type (A3L-ATT) converter, is introduced to increase the reliability of multilevel power converters used in safety-critical applications. This new fault-tolerant multilevel power converter is derived from...

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Veröffentlicht in:IEEE journal of emerging and selected topics in power electronics 2019-03, Vol.7 (1), p.446-457
Hauptverfasser: Katebi, Ramin, He, Jiangbiao, Weise, Nathan
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container_title IEEE journal of emerging and selected topics in power electronics
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creator Katebi, Ramin
He, Jiangbiao
Weise, Nathan
description A novel fault-tolerant three-level power converter topology, named advanced three-level active T-Type (A3L-ATT) converter, is introduced to increase the reliability of multilevel power converters used in safety-critical applications. This new fault-tolerant multilevel power converter is derived from the conventional T-Type converter topology. The topology has significantly improved the fault-tolerant capability under any open circuit or certain short-circuit faults in the semiconductor devices. In addition, under healthy condition, the redundant phase leg can be utilized to share overload current with other main legs, which enhances the overload capability of the converter. The conduction losses in the original outer devices can be reduced by sharing the load current with the redundant leg. Moreover, unlike other existing fault-tolerant power converters in the literature, full output voltages can be always obtained in this proposed A3L-ATT converter during fault-tolerant operation. A 13.5-kW ATT-A3L converter prototype was developed and constructed using silicon carbide MOSFETs. Simulation and experimental results were obtained to substantiate the theoretical claims of this new fault-tolerant power converter.
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subjects Active T-Type (ATT) converter
Circuit faults
Conduction losses
Electronics
Fault tolerance
Fault tolerant systems
fault-tolerant operation
Inverters
Legged locomotion
MOSFETs
open circuit
overload capability
Power converters
redundant leg
Safety critical
Semiconductor devices
short circuit
Short circuits
Silicon carbide
silicon carbide (SiC) MOSFET
Switches
Topology
title Investigation of Fault-Tolerant Capabilities in an Advanced Three-Level Active T-Type Converter
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