Evaluation of SiC VJFET Devices for Scalable Solid-State Circuit Breakers

Report No. ARL-MR-0693
Authors: Damian P. Urciuoli
Date/Pages: May 2008; 20 pages
Abstract: Power electronic converters functioning as components in high power systems, such as those of hybrid military ground vehicles require fast fault isolation, and in most cases benefit additionally from bi-directional fault isolation. To prevent converter damage or failure, fault current interrupt speeds in the hundreds of microseconds to few millisecond range are necessary. Presently used mechanical contactors do not provide adequate actuation speeds, and suffer severe degradation during repeated fault isolation. Instead, it is desired to use a large array of semiconductor devices having a collectively low conduction loss to provide large current handling capability and fast transition speed for current interruption. This report discusses the use of SiC MOSFETs and the evaluation of SiC JFETs for a bi-directional solid-state circuit breaker application.
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 2008