Performance Comparison of ETT- and LTT-Based Pulse Power Crowbar Switch
Performance Comparison of ETT- and LTT-Based Pulse Power Crowbar Switch
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DOI：
10.1109/tps.2017.2759668
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发表时间：
2017-10
影响因子：
1.5
通讯作者：
T. G. Subhash Joshi;V. John
中科院分区：
文献类型：
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作者：
T. G. Subhash Joshi;V. John
高压高功率脉冲开关采用半导体器件，最好是晶闸管，因为它们提供了优越的性能。触发方式分为电触发晶闸管(ETT)和光触发晶闸管(LTT)。由于专门的闸门结构和许多内置保护，LTT的成本比ETT高得多。应用程序中的操作模式，如Crowbar，不需要所有这些内置保护。本文分析了撬棍的工作原理，并对LTT的内置保护进行了综述。本文提出了三个实验，在ETT和LTT之间选择用于撬棒应用的晶闸管。这些实验涵盖了用ETT和LTT建造的10千伏、1kA撬棍的电气性能和电磁发射，可以用来对撬棍电路的性能进行基准测试。从三个实验中发现，基于ETT的Crowbar的性能与基于LTT的Crowbar相当。基于所提出的基准测试方法进行的实验表明，基于ETT的Crowbar是一种经济高效的Crowbar应用解决方案。
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.