Arc reignition is an important reason for prolonging the disconnection time of highvoltage DC relays.In order to study the reignition characteristics inside the arc extinguishing chamber,the permanent magnet magnetic field was simulated by Comsol Multiphysics and the result was used as the basic condition for arc simulation.The dynamic characteristics of the arc and the reasons for arc reignition under the influence of magnetic field strength,breaking speed,contact shape,and atmospheric pressure were simulated and analyzed.A four factor three-level orthogonal experiment was designed,and the degree of influence of each factor on arc reignition was studied through simulation.The results indicate that the heat dissipation conditions in the arc gap and the electric field strength exerted by the arc voltage on the arc gap are important reasons for arc reignition.The worse the heat dissipation conditions or the higher the electric field strength exerted by the reverse arc voltage,the easier it is for arc reignition to occur.The degree of influence of four factors on arc reignition is in the order of breaking speed,gas pressure,contact shape,and magnetic field strength.
关键词
高压直流继电器/电弧重燃/永磁体/正交试验
Key words
high voltage DC relay/arc reignition/permanent magnet/orthogonal test
维普
万方数据