Translated Abstract
With the rapid development of electronics and communication technology, the requirement for electronic equipment, especially the microelectronics equipment’s surge immunity ability is getting higher. The weak over voltage or electromagnetic interference can cause catastrophic damage to the sensitive equipment. Gas surge protective gap (SPG) is an important component of the surge protector, which has the significant characteristics of strong diversion ability, small equivalent capacitance and high insulation resistance. Glow discharge voltage, breakdown voltage are important parameters of gas SPG.
The SPG’s glow discharge voltage, DC breakdown voltage and impulse breakdown voltage is generally measured after the SPG is manufactured. The final design of the product shall pass through manufacturing, testing, optimization design, and other repetitive work. The product’s development cycle is long. Therefore, the simulation and experimental research of SPG’s conduction characteristics can get the influence factors and law of the gas SPG, which can save the product development cycle. It also provides theory support for SPG’s research and design. This thesis has important theoretical and engineering application value.
The SPG’s dc glow discharge model, dielectric barrier discharging model, as well as COMSOL Multiphysics numerical analysis methods and simulation environment is established. The glow discharge is studied. The influence of pressure, diffusion constant, and adhesion coefficient on glow discharge characteristics is simulated. The charged particle movement of in argon dc discharge is simulated. Ac dielectric barrier glow discharge is studied, and the results show that the plasma movement ＂life＂ is much higher than electron movement, within two cycles of ac voltage. The plasma movement can achieve relatively stable state.
The experiment platform of the SPG’s glow discharge and impulse breakdown is established. The experimental results show that the discharge progress of switching-type surge protective devices could be simulated, and compared with the experimental results, the experimental results of DC breakdown voltage is approximately the same with the Paschen curve got by simulation, the current amplitude’s error is less than 10%. In impulse current experiments, the current peak amplitude error between experiment values and simulation results are less than 5%. Theoretical simulation and experimental results verify the feasibility and the accuracy of SPG’s glow discharge and breakdown discharge model. The research will provide a certain theoretical basis for SPG’s further study, design, developments and engineering application
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