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Based on magneto-hydrodynamics (MHD) theory, an air arc model is set up for the contacts and arc inducing plate at chamber inlet of a certain type of DC contactor and the dynamic behavior of the arc is simulated. The variation laws of arc length and the main conductive area migrating from moving contact to arc inducing plate were studied quantitatively under the influence of breaking speed and the...
Due to the characteristics of easy access, non-toxic, stable physicochemical properties and non-combustion supporting, N2 and CO2 gases attract a lot of attention of researchers as a possible substitute for SF6. Based on the gas dynamics equation, considering the collision of charged particles, the arc formation process in mixed gas circuit breaker is simulated from the microscopic point of view in...
Based on magnetohydrodynamics (MHD) theory, the model of air arc in arc extinguish chamber with metal splitter plate of DC contactor is set up. By assuming the arc plasma sheath and coupling loop equation in the calculation, the arc motion and the process of extinguishing the arc by splitting into series arcs by metal splitter plates are simulated. The reasons for the formation of air vortex on the...
The results of an experimental study of corona discharge on aligned multi-walled carbon nanotubes electrode in air at atmospheric pressure are presented in this paper. The breakdown voltage and corona pulses on nanotubes electrode are discussed compared with aluminum electrodes. It is found that the breakdown voltage reduced largely by using nanotubes electrode, and the repetition rate of nanotube...
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