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首页> 外文期刊>Review of Scientific Instruments >Fast switching thyristor applied in nanosecond-pulse high-voltage generator with closed transformer core
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Fast switching thyristor applied in nanosecond-pulse high-voltage generator with closed transformer core

机译：快速开关晶闸管在闭合磁芯的纳秒脉冲高压发生器中的应用

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For a compact and reliable nanosecond-pulse high-voltage generator (NPHVG), the specification parameter selection and potential usage of fast controllable state-solid switches have an important bearing on the optimal design. The NPHVG with closed transformer core and fast switching thyristor (FST) was studied in this paper. According to the analysis of T-type circuit, the expressions for the voltages and currents of the primary and secondary windings on the transformer core of NPHVG were deduced, and the theoretical maximum analysis was performed. For NPHVG, the rise-rate of turn-on current (di/dt) across a FST may exceed its transient rating. Both mean and maximum values of di/dt were determined by the leakage inductances of the transformer, and the difference is 1.57 times. The optimum winding ratio is helpful to getting higher voltage output with lower specification FST, especially when the primary and secondary capacitances have been established. The oscillation period analysis can be effectively used to estimate the equivalent leakage inductance. When the core saturation effect was considered, the maximum di/dt estimated from the oscillating period of the primary current is more accurate than one from the oscillating period of the secondary voltage. Although increasing the leakage inductance of NPHVG can decrease di/dt across FST, it may reduce the output peak voltage of the NPHVG.
机译：对于紧凑而可靠的纳秒脉冲高压发生器（NPHVG），规范参数的选择和快速可控固态开关的潜在用途对优化设计具有重要意义。本文研究了具有闭合变压器芯和快速开关晶闸管（FST）的NPHVG。通过对T型电路的分析，推导了NPHVG变压器铁心一次，二次绕组的电压和电流表达式，并进行了理论上的最大值分析。对于NPHVG，跨FST的开启电流（di / dt）的上升速率可能超过其瞬态额定值。 di / dt的平均值和最大值均由变压器的漏感确定，两者之差为1.57倍。最佳绕组比有助于以较低的FST获得较高的电压输出，尤其是在建立了初级和次级电容的情况下。振荡周期分析可以有效地用于估计等效漏感。当考虑铁芯饱和效应时，从一次电流的振荡周期估算出的最大di / dt比从二次电压的振荡周期估算出的最大di / dt更准确。尽管增加NPHVG的漏感可以降低FST上的di / dt，但可能会降低NPHVG的输出峰值电压。

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