Analysis on the Influence of Turn-off Characteristics of Thyristor on Augmented Railgun

doi:10.3969/j.issn.1000-1093.2016.09.007

Abstract

Abstract: Based on the load characteristic of an augmented railgun, the influence of turn-off characteristics of high power thyristor is analyzed. The research shows that part of electric energy in pulse forming network cannot be used effectively in the process of launching experiment. The major reason is that the initial inductance of augmented railgun is larger and the rail current is of trapezoidal wave. Thus the breech voltage of augmented railgun is higher at the initial phase of launch, leading to the situations when the high power thyristor is shut off due to reverse voltage and the stored electric energy of pulse forming unit is not released entirely during discharging. The above conclusions are verified by the simulation and experiment of augmented railgun. According to the actual state of the pulse forming network in augmented railgun, the reuse of remaining energy is discussed. The research conclusion has a guiding role for the application of high power thyristor in augmented railgun system.

Key words: ordnance science and technology, thyristor, pulse forming network, electromagnetic launch, augmented railgun

CLC Number:

TJ99

LI Zhen-xiao， ZHANG Ya-zhou， NI Yan-Jie， LI Bao-ming. Analysis on the Influence of Turn-off Characteristics of Thyristor on Augmented Railgun[J]. Acta Armamentarii, 2016, 37(9): 1599-1605.

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