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Performance Comparison of ETT- and LTT-Based Pulse Power Crowbar Switch

Joshi, Subhash T G and John, Vinod (2017) Performance Comparison of ETT- and LTT-Based Pulse Power Crowbar Switch. In: IEEE TRANSACTIONS ON PLASMA SCIENCE, 45 (11). pp. 2994-3000.

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Official URL: http://doi.org/10.1109/TPS.2017.2759668


High-voltage high-power pulse switches are built with semiconductor devices, preferably thyristor, due to the superior performance that they offer. Triggering methods classify the thyristor as electrically triggered thyristor (ETT) and light triggered thyristor (LTT). Due to the specialized gate constructions and many build-in protections, the cost of LTT is much higher than ETT. The operating modes in applications, such as crowbar, do not require all these build-in protections. In this paper, the operation of a crowbar is analyzed, and the build-in protections of LTT are reviewed. This paper proposes three experiments for the design selection of thyristor, between ETT and LTT, for crowbar applications. The experiments cover the electrical performance as well as electromagnetic emissions in a 10-kV, 1-kA crowbar built with both ETT as well as LTT, which can be used to benchmark the performance of the crowbar circuit. From the three experiments, the performance of ETT-based crowbar is found to be comparable with LTT-based crowbar. Based on the experiments carried out with the proposed benchmarking approaches, this paper shows that ETT-based crowbar is a cost-effective solution for crowbar applications.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 01 Dec 2017 06:55
Last Modified: 01 Dec 2017 06:55
URI: http://eprints.iisc.ac.in/id/eprint/58354

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