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Analys och modellering av ljusbåglängdsregleringen i pulsad MIG/MAG-svetsning / Analysis and modelling of arc length control in pulsed MIG/MAG welding

This master thesis deals with problems in the arc length control in Pulsed MIG/MAG Welding. The main problem is that it is not possible to measure the arc length. In the present solution the voltage over both the electrode and the arc represents the arc length. To improve the arc length control a model of the electrode melting has been built. One output from the model is the voltage over the electrode and with this voltage together with the measured voltage it is possible to calculate the voltage over just the arc. Then, having the arc voltage as a value of arc length the arc length control can be improved, which is showed in the end by simulations. Simulations with the present control system are compared with the new one, when the controller is able to control the arc voltage instead of the sum of both the electrode voltage and the arc voltage.

Identiferoai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-2370
Date January 2004
CreatorsPilkvist, Andreas
PublisherLinköpings universitet, Institutionen för systemteknik, Institutionen för systemteknik
Source SetsDiVA Archive at Upsalla University
LanguageSwedish
Detected LanguageEnglish
TypeStudent thesis, info:eu-repo/semantics/bachelorThesis, text
Formatapplication/pdf
Rightsinfo:eu-repo/semantics/openAccess
RelationLiTH-ISY-Ex, ; 3500

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