Performance Analysis Of Solid State Relay Electromagnetic Pulse Resistant And Performance Optimization

As a kind of electronic system failure effect, electromagnetic pulse interferencehas great destruction, and it has become a military attack means. Its effects anddefense is a hot issue in recent years. Solid state relay in the weapon equipment,aerospace systems, is often one of the key components of system equipment. solidstate relay immunity to electromagnetic pulse determines the electronic systemcomposed of the pulse environment ability to survive in the strong electromagnetic.Therefore, it has very high research value effect and optimization of pulseelectromagnetic design of solid state relay.The main way of electromagnetic interference into the radiation andconduction interference. This paper studies the electromagnetic radiationinterference effects on solid state relay. The shielding effectiveness of solid staterelay shell material is calculated, the shell material has good shielding effect, useCST-Microstrips software to establish a solid state relay in the electromagneticpulse shielding effect of joint simulation model of interference in its shell wassimulated, thus on the theoretical calculation, evidence of good shielding effect ofsolid state relay. Electromagnetic pulse coupling of solid state relay route forthrough pinout conduction conclusion.Then analyzes the effect of electromagnetic pulse conduction coupling of solidstate relay. Combined with the electromagnetic pulse of small size cylindricalconductor and the annular conductor, the electromagnetic pulse coupling principleJoule energy density, energy conservation principle, puts forward a method ofelectromagnetic pulse equivalent of the square wave, and for a certain type of solidstate relay electromagnetic pulse interference for different pulse width square wave.Extraction of parasitic parameters of solid state relays on the printed circuit boardthrough the software, the high frequency equivalent model, and use the model withsquare wave injection method for solid state relay electromagnetic pulse effectssimulation analysis.By the analysis of simulation results of the solid state relay by the failureprocess and mechanism of the effects of electromagnetic pulse, determine thesensitive device input, output. From the point of failure mechanism, combined withthe reinforcement method of electromagnetic pulse, to optimize the design of solidstate relay. In the input, the output port with transient suppression circuit protection,theoretical analysis of the relationship between suppression device with multilevel.Finally the optimization scheme of the solid state relay is a contrast test, the optimized solid-state relay can be instantaneous voltage clamp electromagneticpulse interference resulting in damage threshold, and played a good dischargecurrent effect.