FUNDAMENTAL CONSIDERATIONS IN THE DESIGN OF AN AC ARC HEATER

摘要

Certain design criteria fundamental to the successful operation of an AC arc heater facility are discussed in some detail. An approximate model of a cooled metallic electrode which is being heated, by a moving arc is analyzed allowing one to see what combination of parameters affects electrode lifetime. The behavior of a three-phase inductive cir¬cuit containing arcs is studied assuming a temporal square wave arc voltage variation. It is shown that predictions of power factor, maxi¬mum useful power, RMS current, etc., can be made if one knows only the ratio of the arc voltage to the peak line voltage.