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Active power measurement in arc welding and its role in heat transfer to the plate
University of Uberlandia, Center for Research and Development of Welding Processes of the Federal, Uberlandia, Brazil.
IMC Soldagem, Palhoça, Brazil.
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0002-1005-5895
2017 (English)In: Welding in the World, Vol. 61, no 4, p. 847-856Article in journal (Refereed) Published
Abstract [en]

A contemporary paper claimed that a method using the resistance of impedance (active power) for arc power calculation is more accurate than the conventional approach, with consequences on the actual heat transfer to the plate. However, despite the comprehensive reasoning, no heat-related results are shown in this intriguing paper to support the claim. Thus, the aim of this work was to apply the proposed method for determining the weight of active power in the total arc power. A series of weldments was carried out, by using GTAW in constant and pulsed current modes and short-circuiting GMAW with different inductance settings. The effect of the active power on the heat transfers to the plate was assessed by both bead cross-section geometries and calorimetry. The results showed that even a significant fraction of active power of the total power was reached, no changes in bead geometry or heat input were found. A review of the assumptions used in the primal paper showed that an arc is better represented by an ER circuit than by an RLC circuit. As a conclusion, the arc as a reactance-free load presents no component such as non-active power and the conventional approaches are accurate methods to measure arc power, representing the actual active power. © 2017, The Author(s).

Place, publisher, year, edition, pages
2017. Vol. 61, no 4, p. 847-856
Keywords [en]
Electric arcs; Electric resistance; Electric welding; Heat resistance; Resonant circuits, Active power; Active-power measurements; Arc modeling; Arc power; Conventional approach; Cross-section geometry; Energy inputs; Pulsed current mode, Heat transfer
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-11913DOI: 10.1007/s40194-017-0470-9Scopus ID: 2-s2.0-85019070940OAI: oai:DiVA.org:hv-11913DiVA, id: diva2:1165752
Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2018-05-17Bibliographically approved

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