周期永磁环爆磁压缩发生器  

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

作　　者：董志伟[1] 王贵荣[1] 王玉芝[1] 赵强[1] 杨显俊[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2006年第2期345-348,共4页High Power Laser and Particle Beams

基　　金：中国工程物理研究院基金资助课题(20020213)

摘　　要：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1.0μH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。in a lot of single-shot applications and experiments at remote locations where magnetic flux compression generator （MFCG） provides the most practicable power, it is impracticable or inconvenient to use a capacitor bank to be the initial energy source. Godovnina, V.V. et al have used a homogenous permanent magnet as 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 the initial energy source of an MFCG was analyzed theoretically and numerically. It was concluded that about 1 kJ initial energy can be provided to an MFCG by the periodic-ring permanent magnetic ring which weights less than 30 kg and the outside radius less than 30 cm. In this paper, an axially detonated MFCG with a two-period alternating PPM ring. Structure is provided, and its current amplification expression is reduced. Meanwhile some numerical examples for such an MFCG are also provided. For NaFeB, the axially detonated PPM ring MFCG can output current over 150 kA. It is concluded that an experimental investigation of such an MFCG design is worthwhile.

关 键 词：周期永磁环 初级能源 螺旋型爆磁压缩发生器 等效电路模型 

分 类 号：TN7[电子电信—电路与系统]