Lightning current impact test bench

Abstract

The invention discloses a lightning current surge test bench comprising a charging unit, an energy storage unit, a gap switch unit, at least one first wave-modulated resistor, a second wave-modulated resistor, an inductor, a non-gap adaptive Crowbar switch unit, and a carrier for to-be-tested objects. The charging unit is connected to the energy storage unit. The non-gap adaptive Crowbar switch unit and the second wave-modulated resistor, which are connected in series, are connected in parallel with the energy storage unit and are disposed between the inductor on one hand and the gap switch unit and the at least one first wave-modulated resistor which are connected in series on the other hand. The non-gap adaptive Crowbar switch unit includes a high-voltage fast pulse semiconductor assembly and a support frame. A connecting plate is composed of a steel plate layer and copper conductive layers disposed on the upper and lower surfaces of the steel plate layer. An open-circuit resistor is connected across the other end of the inductor and the low-voltage end of the carrier for to-be-tested objects. The lightning current surge test bench of the invention can be applied to class-I lightning waveform, long-tail surge current wave, and A wave and D wave of direct lightning waveform. The utilization efficiency of capacitance is improved. No peak shock is generated. The waveform is smooth.

Description

technical field [0001] The invention relates to the technical field of surge protector testing, in particular to a lightning current impact test bench. Background technique [0002] Lightning is a natural discharge phenomenon in nature. After lightning occurs, through the action of electrostatic induction and electromagnetic induction, lightning overvoltage will be formed in the communication line. The lightning current impact test bench is mainly used to simulate the lightning current generator to generate a pulse current waveform with a large current and a long duration. It is mainly used to simulate the current waveform of Class I lightning (direct lightning) 10 / 350μs, and the direct lightning effect test waveform of the aircraft. Generator of A component, D component, and power supply 10 / 1000μs long tail waveform. [0003] At present, there are two main types of lightning current impact test benches on the market, one is the CRL discharge circuit based on the tradition...

AI Technical Summary

Problems solved by technology

[0006] (1) The control of the generator is more complicated, and it is necessary to control the triggering systems of two sets of generators (lightning current impulse test bench and impulse voltage generator) at the same time, so that the impulse voltage generator delays the impulse current for a certain time, and the time control requires Accurate, otherwise it is prone to discharge failure and difficult to control;

[0007] (2) For multiple ball distance control, the whole system needs to control the three-ball motion of G2 and the coupling ball gap of G3, as well as the trigger ball gap of the impulse voltage generator body, in addition to this set of triggers, which is difficult to coordinate;

[0008] (3) It is difficult to debug the waveform, the length of the wave tail is controlled by the size of the crowbar energy storage inductor L1, but in different tested products

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