Lumped circuit model for the PTS driving Z pinch load implosion
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摘要: 为方便描述聚龙一号装置与Z箍缩负载的电磁耦合过程，基于大量电参数实验数据和全电路模拟分析，建立了一个简化的集总电路模型，获得了等效电压波形和等效电阻、电感等集总参量。采用水介质三板输出线出口位置的开路电压作为等效电压，进一步拟合为正弦平方函数，峰值为3.3 MV（当前驱动器充压为65 kV），零到峰值的时间长度为102.5ns。采用简化的流阻抗模型描述磁绝缘传输线内部空间电子流的电流损失效应。将电路程序与零维负载动力学程序耦合模拟，得到了与实验结果符合的负载电流波形，尤其电流波形的前沿和峰值符合较好，分析了电磁能转化为负载动能的过程。Abstract: To study conveniently the electromagretic coupling of Primary Test Stand (PTS) with Z pinch load, based on experimental electrical data analysis and full circuit simulations, a simple lumped circuit model (LCM-PTS) was established and the lumped parameters were discussed in detail. The equivalent voltage was obtained by constructing the open circuit voltage at the tri-plate output water transmission line, which could be fitted by a function of 3.3sin2(t/205). The space electrons current loss in the magnetically insulated transmission line was simplified by flow impedance model. Simulations were carried out by coupling the LCM-PTS model with a 0-dimensional dynamic model of Z pinch loads, and the load currents agreed well with the experimental results.
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Key words:
- PTS /
- Z pinch /
- circuit simulation /
- lumped parameters
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