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A series of triggering experiments were carried out to investigate into the characteristics of vacuum arc controlled by TMF-AMF contacts. During the whole experiments, current ranged from 5kA to 20kA (rms) and both arc appearance and the behavior of cathode spots were captured by high-speed camera with corresponding arc current and arc voltage. A 3D steady MHD model was built to simulate and analyze...
In this paper, a method is proposed to simulate the two-dimensional random motion of a single cathode spot step by step. Simulation parameters, e.g., the characteristic displacement and time step of random motion, are taken from relevant experimental data. In every motion step, the moving direction along the x axis (+x or −x) and y axis (+y or −y) are chose randomly, and the displacements along the...
The influence of lagged axial magnetic field (AMF) due to eddy current induced in contacts system on the distribution of cathode spots (CSs) in current-zero stage of vacuum arc with different current falling rates was investigated experimentally. Experiments were conducted with cup-shaped AMF contacts in a demountable vacuum chamber. The characteristic of CSs distribution of triggered vacuum arc in...
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