Multizone System of Gas-Dynamic Double Arcing Process Prevention in Low-Temperature Electric Arc Plasma Jet
The article reviews the multizone method of argon stream control in low-temperature electric arc plasma jet. The method is based on the principle when exhaust plasma-supporting gas velocity is changing discretely in the wake of "cathode-muzzle" junction conduction rising reaching a maximum level only in a critical situation when the bypassing arc appears. Schematic diagram of the installation was represented and the operating principle of electric arc plasma jet with multizone system of gas-dynamic double arcing process prevention was stated. The multizone regime of argon stream control is implemented using the multizone integrated sweep converter with frequency, width and pulse-type modulations. The timing diagrams of the multizone integrated sweep converter and the features of system transition from one modulation zone to another were shown. A functional diagram of "cathode-nozzle" transition conductivity sensor was observed and it's operating principle was explained by the example of the timing signals diagrams. The results of experimental researches were given. This article could be interesting for specialists in plasm-arc technologies and technological processes automation.