A line impedance stabilization network for pulse current injection
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摘要:
目的 针对现有线路阻抗稳定网络（LISN）在电磁脉冲防护能力上的不足，提出一款适用于电气电子设备脉冲电流注入（PCI）试验的LISN。 方法 通过PSpice时域和频域仿真，结合工程设计要求，针对PCI试验中脉冲电流峰值高、上升快等特点，在现有基础上改良LISN的电路拓扑和物理结构，使其同时具有良好的纳秒脉冲防护性能和阻抗稳定能力，并设计开展脉冲电流防护性能测试和阻抗曲线测试试验。 结果 试验验证结果表明，该LISN可以使电流衰减到注入的脉冲电流值的1/60；试验结果与GJB 151B—2013中5 μH型LISN的阻抗曲线之间的误差小于5%。 结论 该LISN具有较好的阻抗稳定能力和去耦能力，可用于电气电子设备的PCI试验，以保护电源并提高试验的可重复性。 Abstract:Objective Aiming at the deficiency of the existing line impedance stability network (LISN) in the electromagnetic pulse protection capability, a LISN suitable for the pulse current injection (PCI) test of electrical and electronic equipment is proposed. Methods Aiming at the characteristics of high peak value and fast rise of the pulse current in PCI testing, the circuit structure and physical structure of the LISN are improved on the existing basis through PSpice time-domain and frequency-domain simulation combined with engineering design requirements, thereby giving it good nanosecond pulse protection performance and impedance stability at the same time. Pulse current protection performance test and impedance curve test experiments are then designed and carried out. Results The experimental results show that the improved LISN can attenuate the injected pulse current by 60 times, while the error of its impedance curve is less than 5% compared with the Type 5 μH LISN in GJB 151B-2013. Conclusions The proposed LISN has good impedance stability and decoupling ability, and can be used in the PCI testing of electrical and electronic equipment in order to protect the power supply and improve the repeatability of testing. -
图 2 5 μH型LISN电磁脉冲防护性能仿真
Figure 2. Simulation of electromagnetic pulse protection performance of type 5μH LISN
图 4 新型LISN电磁脉冲防护性能仿真结果
Figure 4. Simulation results of electromagnetic pulse protection performance of new type LISN
图 11 去耦性能的试验结果与仿真结果对比
Figure 11. Comparison between test results and simulation results of decoupling performance
图 13 新型LISN阻抗曲线的实测值与标准值对比
Figure 13. Comparison between measured results of new type LISN impedance curve and standard curve
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