Abstract:

Against the backdrop of new opportunities brought by the electrification of automobiles to various industries, this paper elaborates on the arc extinguishing scheme of new high voltage DC contactors in the field of new energy applications. To improve the arc extinguishing ability of DC contactors to adapt to gradually increasing voltage levels, a prototype based on rotating arc extinguishing principle was developed. Combining modeling and simulation with actual working conditions, the electrical performance and ultimate breaking capacity of the product were verified, and the experimental waveforms were provided. The results show that the performance of rotating arc extinguishing technology roadmap can be improved by using air-dielectric.

Key words: high voltage DC contactors, arc breaking, rotating arc extinguishing, Arc extinguishing chamber, air-dielectric