Simple model for evaluation of arc stability in AMF contact systems

A simple numerical model for the assessment of the arc stability in AMF electrode systems is suggested. The model combines electromagnetic simulations with simplified plasma description. The plasma model prescribes the basic features of the arc column which moves in accordance with the action of the Lorentz force. Analysis of the plasma trajectory indicates the stability of the arc column considering the lateral displacement toward the metal vapor condensation shield. The model has been used for analysis of the influence of contact geometry on the arc movement. Results are shown for a typical AMF contact system.