周期永磁环爆磁压缩发生器

 首次提出了利用周期永磁环做初始能源的螺旋型爆磁压缩发生器，该结构由4节永磁环正反排到组成。阐述了这种周期永磁环爆磁压缩发生器的结构及其特点，并利用等效电路模型分析了轴线起爆周期永磁环爆磁压缩发生器的磁通变化规律和爆磁压缩过程，得到了基本的电流变化关系。 分析及数值计算结果表明：这种周期永磁环爆磁压缩发生器能够实现电流放大，在磁化电流为0.13 MA，磁化回路负载电感为1.0 μH条件下，最终输出电流可达0.16 MA。周期永磁环可以作为爆磁压缩发生器的初始能源，这种概念设计值得进行进一步的实验探索。

Conceptual design of a periodic permanent magnetic ring magnetic flux compression generator

In a lot of single-shot applications and experiments at remote locations where magnetic flux compression generator(MFCG) provide the most practicable power,it is impracticable or inconvenient to use a capacitor bank to be the initial energy source.Gdovnina,V.V.et al[1] has used a homogenous permanent magnets to be the initial energy source to drive MFCG,but the energy density stored in a single permanent magnet is very low.The possibility of using periodic permanent magnetic ring structure to be initial energy source of an MFCG was analyzed theoretically and numerically.It was concluded that about 1kJ initial energy can be provided to an MFCG by the periodic-ring permanent magnetic ring which weights less than 30kg and the outside radius less than 30cm.In this paper,an axially detonated periodic permanent magnetic ring MFCG structure is provided,and its current amplification expression is reduced.Meanwhile some numerical examples for such a MFCG are also provided.It is concluded that an experimental investigation of such a MFCG design is worthwhile.