Appearance and Motion of Vacuum Arc in Variable Frequency Aviation Power Supply System

摘要

Variable frequency (360-800 Hz) power technology is widely used in aircraft power supply systems. This paper studies the appearance and motion of vacuum plasmas in axial magnetic field (AMF) and butt contacts at 360-800 Hz. By the influence of the AMF, electrons will travel in a cylindrical spiral, which is advantageous for maintaining arc diffusion. The experimental results show that when the contact separation was 3 mm, the vacuum arcs were uniformly distributed and diffused in the AMF contacts. We found that the maximum magnetic pinch force in an arc column was about 10