Development of primary magnetic field coil power supply system of kilo-tesla cylindrical implosion magnetic flux compression generator
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摘要: 初始磁场电源系统用于激励千特斯拉级内爆磁压缩装置的初级线圈产生初始磁场，是内爆磁压缩装置的关键设备。在分析千特斯拉级内爆磁压缩装置初始磁场电源需求和技术难点的基础上，系统设计了核心部件选择方案和主脉冲电路及控制系统结构，研制成功一套输出电压1～40 kV可调、主放电电流脉冲上升沿约60 μs、总峰值电流达3.2 MA的初始磁场电源系统，已应用于千特斯拉级内爆磁压缩装置动态试验。Abstract: The primary magnetic field coil (PMFC) power supply system is designed for pumping the PMFC of the kilo-tesla cylindrical implosion magnetic flux compression generator (MC-1) to produce initial magnetic field. It is the key equipment of the MC-1 system. Based on analysis of the requirements and the key techniques, the key components, pulsed forming circuits and control system of the PMFC power supply system were designed. The power supply system with the output voltage adjustable from 1 kV to 40 kV, the rise front about 60 μs and the peak current reached 3.2 MA was developed successfully. The power supply system has been applied to the dynamic test of the kilo-tesla cylindrical implosion magnetic flux compression (MC-1) generator.
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图 1 初始磁场电源系统总体结构图
Figure 1. Schematic diagram of the primary magnetic field exciting power system
图 2 初始磁场电源系统主放电电路示意图及模块化设计框图
Figure 2. Schematic diagram of the discharge circuit and the block diagram of the modularity design in the primary magnetic field exciting power system
图 6 Crowbar开关不启动时电源系统实验波形
Figure 6. Power system experimental waveform when crowbar switch does not start
图 7 电流峰值时刻投入撬棒开关的电源系统实验波形
Figure 7. Experimental waveform of power supply system with crowbar switch input at peak current moment
表 1 放电电路参数表
Table 1. Parameters of the discharge circuit
inductance
of the
load/μHresistance
of the
load/mΩtotal capacitance
of
capacitors/mFinternal inductance of the parallel capacitors/nH shunt resistance of the parallel capacitors/mΩ fly-back resistance/mΩ inductance of the parallel cables/nH shunt resistance of the parallel capacitors/mΩ 0.3 0.2 4 10 0.25 4 10 0.25 fly-back resistance/mΩ inductance of the parallel cables/μH internal resistance of the parallel cables/mΩ distribution capacitance
of the parallel
cables/nFinductance of
bus-bar/nHresistance of
bus-bar/mΩcapacitance of
bus-bar/nF4 0.1 0.5 103 40 0.5 20 
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