Line impedance stabilization network structure suitable for pulse current injection

Abstract

The invention discloses a line impedance stabilization network structure suitable for pulse current injection, which takes a pulse current injection experiment as an application background, and on the basis of a 5 mu H-type LISN circuit structure in the existing GJB 151B-2013, by increasing ground capacitance and adding a primary inductor, a line impedance stabilization network with good impedance stabilization performance and electromagnetic pulse protection performance is designed. In actual device selection and physical layout design, the turn-to-turn insulation reinforced air core inductor is designed by oneself according to the characteristics of short rising time and high voltage peak value of electromagnetic pulse, a measurement loop is removed in a targeted manner, and a high-voltage metal oxide film resistor is selected. Finally, the impedance stability curve of the 5 [mu] H-type LISN in GJB 151B-2013 (the deviation from the impedance curve of the 5 [mu] H-type LISN in GJB 151B-2013 is smaller than 5%) and the good pulse current protection performance (under the output of a pulse generator specified in the GJB 8848-2016 and MIL-STD-188-125-2 standards, the attenuation of the pulse current can reach 60 times) are achieved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic pulse conduction effect experiments, and in particular relates to a line impedance stabilization network (LISN) structure suitable for pulse current injection. Background technique [0002] With the rapid development of power systems and electrical and electronic equipment in recent decades, the influence of electromagnetic environment and electromagnetic pulses on power equipment and electrical and electronic equipment has attracted more and more attention from various scholars. Among them, strong electromagnetic environments such as high-altitude electromagnetic pulse (HEMP) have the characteristics of high field strength, wide spectrum and wide coverage area, which is a huge threat to power equipment and electrical and electronic equipment. Existing research results have shown that strong electromagnetic environments such as high-altitude nuclear electromagnetic pulses enter power equip...

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Problems solved by technology

However, because the electromagnetic pulse injected by the pulse current has a fast rise time (rise time <20ns), high amplitude (thousands of amps) and high peak voltage (hundreds of kilovolts), the conventional LISN cannot guarantee that it will withstand the impact of the electromagnetic pulse Insulation breakdown does not occur sometimes, and the existing LISN filter structure is not designed to suppress electromagnetic pulses, and its circuit structure cannot guarantee good electromagnetic pulse protection capabilities

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