Abstract
The peak of resonance current during commutation greatly influences the safety of commutation component in variable polarity plasma arc welding (VPPAW). It is necessary to study measure to restrain the current peak. Phenomenon of arc resonance current is studied by experiments. Analysis shows that the arc resistance is time variable. Model of commutation circuit is set up and simulated. Results indicate that adjusting damp ratio of system is valid to restrain peak of resonance current. Then a new commutation strategy is presented based on variable structure control method. The commutation circuit is redesigned to apply new commutation strategy. Experimental result shows that the peak of resonance current is restrained while commutation speed unchanged. This paper is instructive to design high power supply of VPPAW.
Access provided by Autonomous University of Puebla. Download to read the full chapter text
Chapter PDF
Similar content being viewed by others
Keywords
- Resonance Current
- Variable Structure Control
- Damp Ratio
- Direct Current Electrode Negative
- Direct Current Electrode
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
References
Nunes A C. Variable polarity plasma arc welding in space shuttle external tank [J]. Welding Journal, 1984, 63(9):27–35.
Anon. Variable polarity plasma arc reduces welding costs [J]. Welding and Metal Fabrication, 1984, 52(7):276–277.
M. Tomsic, S. Barhorst. Keyhole Plasma Arc Welding of Aluminum with Variable polarity Power [J]. Welding Journal, 1984, 63(2): 25–32.
Barhorst S. The Cathodic Etching Technique for Automated Aluminum Tube Welding. Welding. Journal[J], 1985, 64(5):28–31
Craig E. The Plasma Arc Process-A Review. Welding Journal, 1988, 67(2):19–25.
Woodward H. U.S. contractor for the International Space Station [J]. Weldi Jounal, 1996, 75(3):35–40
Ding zhiming, Qi Bojin. Study on multi-function arc welding dual inverter [J]. Electric Welding Machine, 1995(2):20–2. (in Chinese)
Li Zhongyou, Liu Xiuzhong, Cheng Maoai etc. Study on Commutating Process and Its Control of Variable Polarity Square Waveform Power Source [J]. Transactions of The China Welding Institution, 2002, 23(2):68–71. (in Chinese)
Hang Zhenxiang, Ying Shuyan, Huang Pengfei etc. Variable polarity process of inverter AC arc welding power source [J]. Electric Welding Machine, 2003, 33(6):13–15, 38. (Chinese)
Xie Xingkui, Wang Li, Li Zhining etc. Variable polarity plasma welding power supply with self-adjusting commutation mode [J]. Electric Welding Machine, 2005(12):45–46, 55. (in Chinese)
安藤弘準.長谷川光雄.溶接ア-ク現象[Ml].産報. 1978
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Li, Z., Du, D., Wang, L., Chang, B., Zhang, H. (2007). Study on the Control Strategy of Commutation Process in Variable Polarity Plasma Arc Welding. In: Tarn, TJ., Chen, SB., Zhou, C. (eds) Robotic Welding, Intelligence and Automation. Lecture Notes in Control and Information Sciences, vol 362. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73374-4_18
Download citation
DOI: https://doi.org/10.1007/978-3-540-73374-4_18
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-73373-7
Online ISBN: 978-3-540-73374-4
eBook Packages: EngineeringEngineering (R0)