The article discusses modified formulas identifying static current-voltage characteristics of arc in AC plasma torches. The modified formulas, making it possible take into account preset values of discharge ignition voltage, were used in the Mayr-Pentegov universal mathematical model. As a result, it was possible to simulate the operation of additional ionising and stabilising systems, commonly used in AC plasma torches. The article also presents results of numerical simulations concerning processes taking place in electric circuits with single-phase plasma torches of various operating parameters.

doi: 10.17729/ebis.2022.3/3