Static Characteristics of Defined Ignition Voltage Used in the Modelling of Arc within a Wide Range of Current Excitation
Journal Title: Biuletyn Instytutu Spawalnictwa - Year 2019, Vol 63, Issue 1
Abstract
The article presents relatively extensive sets of selected functions useful for the approximation of voltage-current characteristics of static arc of defined and undefined ignition voltage values. The article contains graphs of the above-named functions presenting their effectiveness in the mathematical representation of arc within wide ranges of current excitation. Selected static characteristics were applied to the Pentegov mathematical model. The research also involved simulations of processes in circuits with models of arc having defined and undefined ignition voltage.
Authors and Affiliations
Antoni Sawicki
The Use of a Bobbin Tool in the Friction Stir Welding of Plates Made of Aluminium Alloy EN AW 6082 –T6
The article presents test results concerning the friction stir welding of 6 mm thick plates made of aluminium EN AW – 6082. The welding process was performed using a tool consisting of two shoulders and a probe. The test...
Damping factor function in AC electric arc models. Part 4: Arc model selection criteria and determination of time constant in low current arc
Causes of problems in strict classification of arcs into two categories: low and high current have been described. Assumption has been taken that processes in column can be approximated with one of two models: Mayr or Ca...
Two cases of high alloy austenitic steel failures
The article presents failures of structures made of austenitic steels. The first part is concerned with accelerated (centrifugally) cast tubes (ϕ 52.6 x 5.8 mm) made of steel 25-35 CrNi exposed to high temperature and se...
TIG Method in the Multiple Repair Welding of Long-Operated Components in the Power Industry
The article presents the results concerning the repair welding of a long-operated waterwall using the mechanized TIG method. The tests were focused on determining the effect of a repair performed in order to remove crack...
Effect of the One-Time Repair of Welded Joints in Steel S690QL on the Properties of the HAZ
An essential stage in the making of steel structures involves the removal of welding imperfections. Undoubtedly, an additional thermal cycle accompanying the remaking of a weld adversely affects the mechanical properties...