全固态高重复频率磁脉冲压缩发生器  

All-solid-state high-repetition-rate magnetic pulse compression generator

作　　者：张东东[1,2] 周媛[1,2,3,4] 李文峰[1,2,3] 许家雨[1,2,3] 王珏[1,2] 邵涛[1,2] 赵莹[1,2] 徐蓉[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院电力电子与电气驱动重点实验室,北京100190 [3]中国科学院研究生院,北京100049 [4]天津职业技术师范大学自动化与电气工程学院,天津300222

出　　处：《强激光与粒子束》2012年第4期889-892,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50907068;50707032;51007087;51007089);国家973计划项目

摘　　要：设计制作了全固态高重复频率磁脉冲压缩发生器,最高重复频率5kHz,脉宽70ns,通过调节初始储能电容上的电压可在500Ω阻性负载上获得4～40kV连续可调的输出电压。通过分析简化的磁压缩末级回路,分析了预脉冲产生的过程,得出了预脉冲的电压表达式,选取适当的磁芯相对磁导率,经过求解,得出在磁开关未饱和电感一定时预脉冲随负载阻值变化的曲线簇,从曲线中可以看出:随着负载的阻值的增大,预脉冲的峰值绝对值也增大;在负载恒定的情况下,增大磁开关未饱和电感的大小可以显著地减小负载两端预脉冲的峰值绝对值,这要求磁开关磁芯有更高的相对磁导率。The paper presents an all-solid-state high-repetition-rate pulse generator with adjustable output amplitude based on magnetic pulse compression（MPC） technique.The pulse compression network makes use of commercially available IGBTs switching a capacitor bank into a metglas transformer together with a voltage doubling circuit.The capacitor bank is charged to 500 V by a resonant LC charger,and also switched by a commercial diode.The output of the pulse generator is controlled by the gate voltage of the IGBTs.Pulses with a width of 70 ns can be generated with repetition rates up to 5 kHz.The amplitude can be controlled from 4 kV to 40 kV into a 500 Ω load.Equivalent circuits for the final operation stage of the compressor accounting for pre-pulse in magnetic switches are presented and analyzed,and the pre-pulse generation process of the MPC system is discussed.Simulation results show that,increasing the unsaturated inductance of the magnetic switch and reducing the load resistance enhance the pre-pulse peak.Thus to diminish the pre-pulse,a better ferrite core with higher permeability should be considered.

关 键 词：脉冲功率 磁脉冲压缩 磁开关 可饱和脉冲变压器 

分 类 号：TN78[电子电信—电路与系统]