基于晶闸管的大电流脉冲发生器研制

Development of large current pulse generator based on thyristor

摘要: 采用串并联结合的Marx发生器结构，以晶闸管作为开关元件，设计了大电流脉冲发生器。通过导通回路电流分析了脉冲发生器的自触发原理，并模拟了输出脉冲电流激励磁透镜产生磁场的变化曲线。进行实物电路的研制，采用充电电容参数为600 V/2200 μF，充电电压为550 V。在负载电阻为6 Ω，负载电感为31.5 mH的条件下，获得输出电压峰值为−2.1 kV，半高宽为7.34 ms，脉冲前沿为450 ns；输出电流峰值为−225 A，半高宽为6.3 ms，脉冲前沿为4.11 ms。

Abstract: Applying series and parallel structure, a high current pulse generator was designed with thyristor. By analyzing the conducting current in circuit, the self triggering principle of the pulse generator is described. The variation of magnetic field in lens excited by output pulse current is simulated. The output characteristics of the circuit were measured. Using capacitors with parameters of 600 V/2200 μF and DC voltage of 550 V, under load resistance of 6 Ω and load inductance of 31.5 MH, a pulse with amplitude of −2.1 kV, FWHM of 7.34 ms, and pulse front of 450 ns was obtained. The pulse current is −225 A in amplitude, 6.3 ms in FWHM, 4.11 ms in pulse front.