Coupling characteristics experiment of switch prefire in multi-stage linear transformer driver
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摘要: 基于50级模块串联的LTD单路样机，开展了开关自放电故障耦合影响实验，获得了开路和短路负载下、不同位置LTD模块内单只开关自放电对其余LTD模块的电压耦合影响规律。结果表明，两种负载条件下，LTD模块内单只开关自放电时在其余模块内耦合的电压幅度均较低，且LTD距离越远电压幅度越低。在±83 kV的单只开关自放电电压下其相邻模块内耦合的最大电压幅度约2.43 kV（对应电压波动约3%）。Abstract: The influences of switch prefire in different LTD cavities on the other cavities with shorted or open load have been researched based on the 50 stages linear transformer driver module. It is shown that the induced voltage in the other cavities is very low, and the amplitude of voltage signal will decrease with increase of distance. The maximal induced voltage is 2.43 kV when switch prefire occurred in neighbouring cavity at voltage of ±83 kV. The results will contribute to reliability model constructing, analysis and assessment of large scale LTD generator.
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Key words:
- linear transformer driver /
- Z-pinch driver /
- gas switch /
- prefire malfunction
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图 2 LTD模块三维结构以及电压测试点位置示意图
Figure 2. Schematic of the LTD cavity and voltage measurement position
图 3 末端短路情况下第45级LTD模块内一只开关自放电时测得的自身输出电压信号
Figure 3. Output voltage signal measured in the LTD cavity where a switch prefired
图 4 末端短路或开路情况下在第25级LTD模块内出现一只开关自放电时在其余模块上测得的耦合电压信号
Figure 4. Induced voltage signals measured in other cavities when a switch prefired in the 25th cavity with shorted or open load
图 5 末端短路或开路情况下不同LTD模块内出现一只开关自放电时在其余模块上测得的耦合电压幅度
Figure 5. Maximal induced voltage in other cavities when a switch prefired in one of the 50 cavities with shorted or open load
表 1 末端短路时不同LTD模块内出现一只开关自放电时在其相邻模块上测得的最高耦合电压幅度
Table 1. Maximal induced voltage when a switch prefire occurred in neighbouring cavity with shorted load
No. of the cavity in which a switch prefired 1 5 10 15 20 25 30 35 40 45 50 maximal induced voltage in neighbouring cavity /V 2430 1656 1620 1313 1092 748 642 852 905 1045 1488 
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