TPWJ, 2010, #9, 15-19 pages
ANALYTICAL STUDY OF CURRENT CONTROLLER OF POWER SOURCE FOR MICROPLASMA WELDING
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue № 9, 2010 (September)
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
An area of stable converter operation as regards arc voltage was determined. Dependence of the converter coefficient current amplification on its efficiency, voltage of power supply unit and arc voltage drop was established. An analytical dependence of arc current on arc voltage drop, voltage of power supply unit and switching frequency was found. The necessity of application of ferrite core in a choke, inductance of which decreases with current increase, was shown. The need for buffer capacitor was substantiated.
microplasma welding, plasmatron, plasma, plasma plume, arc voltage drop, transistor module, snubber, inductance, choke, buffer capacitor, switching frequency
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