辐照和电流注入下电缆耦合响应的计算
Calculation of braided shielding cable responses in radiation and pulsed current injection environments
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摘要: 采用传输线模型，利用时域有限差分方法计算了辐照和电流注入两种试验环境中电缆屏蔽层电流对芯线的耦合响应，并对响应规律进行了研究。计算结果表明：电流注入时近端负载电压峰值最小，辐照时次之，电流注入时远端最大；负载电压峰值、负载能量与屏蔽层电流源幅度等比例变化；相比较前沿的变化而言，改变屏蔽层电流源前沿对负载电压峰值和负载能量的影响不大；屏蔽层电流源半高宽较小时，负载电压峰值、负载能量与半高宽是非线性关系，屏蔽层电流源半高宽较大时，负载电压峰值、负载能量与半高宽成线性关系；电缆较短时，改变电缆长度对负载电压峰值有影响，而电缆较长时，只会影响电缆负载能量。Abstract: Using the transmission line model, the response in radiation and pulsed current injection(PCI) environments of braided cable shields coupling to inner conductor is calculated by finite-difference time-domain method. The numerical results indicate that the peak value of voltage of radiation environment is larger than the near port of PCI environments, and the far port is the biggest. The peak value of voltage and the integrate value of absolute value of voltage are in direct ratio with the current amplitude of shields. And the value is independent of the rise time. The value is non-linear with the full wave at half maximum(FWHM) for small FWHM, but it is just the opposite for big FWHM. The peak value and the length of cable are changed in the same ratio for short cable, as the length change
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Key words:
- radiation /
- pulsed current injection /
- couple /
- load response
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