杂散参数对串联型磁脉冲压缩器输出特性影响*

使用电路模拟软件(P-Spice)分析了脉冲电容器自身电感、磁开关绕组匝间电容以及磁芯处于不同工作状态时,磁开关绕组自身阻抗等杂散参数对串联型磁脉冲压缩器输出特性的影响。结果表明,匝间电容和磁芯处于未饱和状态下的绕组自身电阻对系统的输出特性影响相对较小；磁芯处于饱和状态时,绕组自身阻抗对系统的电压传输效率影响较大；脉冲电容器的自身电感不仅会降低系统的电压传递效率,同时会影响到输出脉冲上升沿的宽度。基于以上的结论,对单级串联型磁脉冲压缩器进行了优化设计并研制了一台输出峰值电压26kV,脉冲上升时间由4.1us压缩到1.2us的串联型磁脉冲压缩器,电压传输效率大于92.5%。

Influence of the stray parameter on output characteristics of the magnetic pulse compressor

P-Spice is used to analysis the influence of the stray parameter, including self-inductance of the pulse capacitor, inter-turn capacitance and the impedance of the winding, on output characteristics of the magnetic pulse compressor. Results show that inter-turn capacitance and the impedance of the winding (unsaturated state) make minor influence on the output waveform. However, the impedance of the winding (saturated state) reduced the voltage efficiency of the system, conspicuously. Moreover, the self-inductance of the pulse capacitor can not only reduced the voltage efficiency, but influences the rise-time of the output voltage waveform. Based on former results, a single stage magnetic pulse compression system is optimized and experiment results show that electrical pulses with peak voltage of 26kV are got. The rise-time is compressed from 4.1us to 1.2us and the voltage efficiency is over 92.5%.