杂散参数对串联型磁脉冲压缩器输出特性的影响

Influence of stray parameters on output characteristics of the series magnetic pulse compressor

使用电路模拟软件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阻抗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输效率,而且会同时影响到输出脉冲上升沿的宽度。基于以上结论,对基于电容负载的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26k V,脉冲上升时间由4.1ms压缩到1.2ms的串联型磁脉冲压缩器,电压传输效率大于92.5%。

P-Spice was used to analyze the influence of stray parameters, including self-inductance of the pulse capacitor and the inter-turn capacitance and the impedance of the winding in magnetic switch, on output characteristics of the series magnetic pulse compressor. Results show that inter-turn capacitance and the impedance in unsaturated state of the winding make minor influence on the output waveform. However, the impedance in saturated state of the winding reduces the voltage efficiency of the system, conspicuously. Moreover, the self-inductance of the pulse capacitor not only reduces the voltage efficiency but also influences the rise-time of the output voltage waveform. Based on former results, the single stage magnetic pulse compressor system was optimized and a series magnetic pulse compressor, with peak voltage of 26kV, whose pulse rise-time is compressed from 4. ls to 1.2s and whose voltage efficiency is over 92.5% was developed.