Second Stage Half Bridge Inverter Design in AC TIG Welding Machines

Mingfei Wu, David Flynn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

In AC tungsten inert gas (TIG) welding machine application,
there are two kinds of commonly used topologies of the second
stage half bridge inverter circuit. This paper analyses and
compares these two topologies. In addition, in the second
topology, more investigations have been made to show the
factors that can affect the changing rate of the output current as
well as the factors that can affect the current transformation
ratio in the coupled inductor. High changing rate and high
current transformation ratio are the two important requirements
of the electrical power source for AC TIG welding, however,
in the conclusion of the analysis, it is difficult to meet these
requirement at the same time. Therefore, a solution by adding
extra voltage sources across the rectification circuit is proposed
to maintain the high changing rate of the output current as
7A/µs and achieve about 100% current transfer in the coupled
inductor.
Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Power Electronics, Machines and Drives
PublisherInstitution of Engineering and Technology
Number of pages6
Publication statusAccepted/In press - 17 Apr 2018
Event9th International Conference on Power Electronics, Machines and Drives 2018 - Liverpool ACC, Liverpool, United Kingdom
Duration: 17 Apr 201819 Apr 2018
https://events.theiet.org/pemd/

Conference

Conference9th International Conference on Power Electronics, Machines and Drives 2018
Abbreviated titlePEMD 2018
CountryUnited Kingdom
CityLiverpool
Period17/04/1819/04/18
Internet address

Keywords

  • Inductor
  • Inverter
  • Welding

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  • Cite this

    Wu, M., & Flynn, D. (Accepted/In press). Second Stage Half Bridge Inverter Design in AC TIG Welding Machines. In Proceedings of the 9th International Conference on Power Electronics, Machines and Drives Institution of Engineering and Technology.