脉冲形成网络的设计与实验研究
Design and experimental study of pulse forming network
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摘要: 采用陶瓷无感电容器作为储能介质，设计了一种低阻抗高储能密度的中等高压脉冲形成网络。该脉冲形成网络采用无感陶瓷电容器作为储能介质，每一个电容器的容值为1.7 nF。电容器采用相对介电常数较高的钛酸钡作为材料，单个电容器的直径为6 cm、高度为4 cm，该电容器在变压器油中的工作电压可以达到50 kV。实验结果表明，设计的单线型中等高压脉冲形成网络可在1 Ω的匹配负载上获得半高宽220 ns，前沿为40 ns的高压脉冲，能很好满足脉冲功率系统小型化的应用要求。实验研究还表明，设计的低阻抗Blumlein型脉冲形成网络，在工作电压为44 kV时可在2.5 Ω的低阻抗负载上获得脉宽230 ns，前沿约为50 ns的脉冲。Abstract: A high energy density midium-high voltage pulse forming network(PFN) was designed with low self-inductance ceramic capacitors. Each capacitor has a measured capacitance of around 1.7 nF. The capacitors are made from a very high dielectric constant barium titanate dielectric mix, normally used to make high-voltage capacitors, and are 6 cm in diameter and 4 cm in thickness. Electrical strength tests carried out on the tiles has shown that the tiles can withstand an electric stress of at least 50 kV, provided that the tiles are submerged in transformer oil. The experimental results indicate that the rise time of the high voltage pulse is less than 40 ns, the pulse width is about 220 ns when the matched load is 1 Ω for flat(single-layered) and cuboid(double-layered) 6-line L-C PFNs. The cuboi
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