Explosion-driven electromagnetic induction pulse generator
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摘要: 为了探索脉冲发生器新的技术方法，在传统脉冲发生器的基础上，提出了一种依靠爆炸驱动的电磁感应脉冲发生器。介绍了发生器的工作过程，对发生器中炸药的爆炸和冲击过程进行了计算和数值模拟，建立了带有初始电压和初始静磁场的发生器的工作电路模型，得出了感应电压的计算方法。设计了一种通过永磁体提供初始静磁场的脉冲发生器，并分别对装有两种不同炸药的发生器进行了实验。实验表明：爆速较高的炸药驱动发生器可产生峰值更高的电压脉冲。实验结果偏低于计算结果，原因是理论计算中简化了磁芯磁场和冲击波速度。Abstract: In this work, based on the traditional pulse generators, we present an electromagnetic induction generator driven by explosion as a new technology of electromagnetic pulse generator. Having described the working process of the generator, we simulated and calculated the shock process of the explosion. Furthermore, we established the model for the working circuit of the generator with initial voltage and static magnetic, obtaining the calculation method of the induced voltage. An experimental generator with initial static magnetic provided by permanent magnet was designed, and the generators respectively fitted with two different explosives were tested. The experimental results show that the generator driven by higher detonation velocity of explosive can produce higher peak and shorter rise time voltage pulse, which are found to be a little lower than the calculation results due to the simplification in theoretical calculation of the magnetic field of the core and the velocity of shock wave.
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表 1 炸药与冲击波参数
Table 1. Parameters of explosive and shock wave
炸药 ρ0/(g·cm-3) γ D/(km·s-1) pH/GPa um/(km·s-1) Dm /(km·s-1) pm/GPa TNT 1.54 2.83 6.831 18.76 0.906 5.278 29.65 8701 1.64 2.91 8.245 28.51 1.197 5.760 42.75 
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表 2 炸药为TNT时磁芯内部冲击波参数
Table 2. Parameters of shock wave in magnetic core with TNT
监测点 t/μs um/(km·s-1) pm/GPa Dm /(km·s-1) 1 3.81 0.803 25.92 5.206 2 6.34 0.478 23.60 7.963 3 6.81 0.559 27.77 8.013 4 7.27 0.550 23.45 6.877 5 7.74 0.479 16.98 5.718 6 8.58 0.351 10.55 4.848 7 3.85 0.692 22.99 5.358 8 3.94 0.683 23.15 5.467 9 4.15 0.785 28.06 5.765 10 4.19 0.802 30.19 6.072
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表 3 炸药为8701时磁芯内部冲击波参数
Table 3. Parameters of shock wave in magnetic core with 8701
监测点 t/μs um/(km·s-1) pm/GPa Dm /(km·s-1) 1 3.16 1.263 46.25 5.906 2 5.48 0.623 31.60 8.181 3 5.94 0.875 48.47 8.935 4 6.47 1.037 54.34 8.452 5 7.01 1.042 48.68 7.535 6 7.59 0.859 32.88 6.174 7 3.21 1.265 46.61 5.943 8 3.28 1.264 47.19 6.022 9 3.40 1.309 50.46 6.218 10 3.40 1.413 56.10 6.404
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