Characterization And Application Of Multi-parameter Adjustable Intensity Electromagnetic Pulse Test System For Components

With the strong electromagnetic field environment generally appears in the electronic equipment,equipment failure or dysfunction cases occur gradually increased during operation,EM effects gradually become the object of attention of both industrial and military.In order to simulate a strong electromagnetic pulse environment,a small high-voltage electromagnetic pulse test system with adjustable multi-parameters was constructed.Data characterization and related application introduction of this experimental system.The main research work of this paper is as follows:1)The design principle of high-voltage electromagnetic pulse test system is proposed.Here first introduces the principle of double exponential wave formation of high-voltage pulse source,and analyzes the pulse influencing factors by using Matlab simulation;then proposes the design principle of the resistor divider and the waveform data correction algorithm of the voltage divider;finally,a simple load resistance Introduce and propose a structural design plan.2)The design scheme of high-voltage pulse source is proposed.Introduced the design principle and design scheme of high-voltage DC-DC power supply;Designed a mechanical stepping mobile trigger gas spark switch,using finite element simulation software ANSYS to simulate the electric field of gas self-breakdown switches of different shapes and different spacings,and calculate the main parameters of the gas self-breakdown switch devices;A static discharge test was carried out on the pulse source.Based on the test,the influence of air pressure,electrode spacing,and energy storage capacitance on the pulse waveform was analyzed.The pulse source can output a double exponential waveform with a voltage of 10～30 k V,a rising edge of 8-20 ns,and a half-peak pulse width of 35 ns～2 us.3)Research on the structure design of the TEM cell.The theoretical background of the TEM cell design is introduced,and the relevant factors affecting the performance of the TEM cell are introduced.The ANSYS HFSS software is used to model and simulate the cell,combined with the above pulse source to design the overall structure of the TEM cell,and analyze the TEM The characteristic impedance,transmission characteristics and static field distribution of the cell;the electric field probe based on the TEM cell is designed,a probe calibration algorithm is proposed,and the performance of the TEM cell is tested based on this algorithm.4)Use the high-voltage electromagnetic pulse simulator test system to perform electromagnetic interference test on the FPGA communication system,and find out the influence law of high-voltage pulse on communication transmission.It also pointed out the shortcomings of the high-voltage electromagnetic pulse simulator.Finally,a pulse injection current source test system is used to test the HEMP effect of the VHF module.A simple comparison is made with the high-voltage electromagnetic pulse simulator,and the damage to the integrated circuit chip caused by pulses of different power strengths in the injection mode is analyzed.