Abstract
In the initial separation period of anode and cathode contacts, one or more vacuum arcs are generated in contact gap. This paper analyzed different arc ignition modes between Wan-Type transverse magnetic field (TMF) contacts. The three-dimensional finite element simulation models of contacts were established, and the magnetic field distribution and electromagnetic force applied to two arc columns and a single arc column with different arc column intervals were simulated and calculated. It could be found that, under the influence of arc self-generated magnetic field, the electromagnetic force direction of two arc columns had a certain degree of deviation, and the larger arc column interval, the weaker interaction between arc columns. The inductor-capacitor (L-C) oscillating circuit and demountable vacuum chamber were used to establish the experimental system, and the arc appearances were recorded by the high-speed camera to analyze the vacuum arc appearances and expanding characteristics under single-point arc ignition mode, two-point arc ignition mode and three-point arc ignition mode. The influence of contact diameter was also studied. The results showed that the multi-point arc ignition mode was more likely to be formed under a larger breaking current, in addition, with the increase of breaking current, the first two-point arc ignition mode of contacts with smaller diameter appeared earlier.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51777153 and No. U1866202).
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Cui, J., Xiu, S., Li, R., Liu, T., Li, M. (2021). The Arc Ignition Mode Between Wan-Type Transverse Magnetic Field Contacts. In: Ma, W., Rong, M., Yang, F., Liu, W., Wang, S., Li, G. (eds) The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering. Lecture Notes in Electrical Engineering, vol 742. Springer, Singapore. https://doi.org/10.1007/978-981-33-6606-0_13
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DOI: https://doi.org/10.1007/978-981-33-6606-0_13
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