{
  "abstract": "Reliable operation of plasma processes requires a power supply that can regulate and limit the arc current despite rapid changes of the electrical load. Gas-flow fluctuations, arc motion, changing attachment conditions, and electrode interactions can cause abrupt arc-voltage variations and may lead to arc interruption. The power supply must therefore provide fast current control and a suitable actuation layer for supervisory stabilization. This paper presents an adaptive average current-mode controller for a buck converter supplying a nonlinear plasma arc load. Based on an averaged model of the converter inductor dynamics, the controller combines current-error feedback with feedforward compensation of the measured arc voltage. Online adaptation of the inductance and its effective series resistance compensates for converter-parameter uncertainty without requiring an online nonlinear arc model. A Lyapunov analysis establishes bounded estimation errors and asymptotic current tracking for the averaged closed-loop system under bounded-reference assumptions. Experiments with an argon plasma arc demonstrate contact-opening ignition and current-reference tracking under varying arc- voltage conditions, supporting the controller as a fast current-control layer for plasma applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.07930",
  "author_total": 2,
  "authors": [
    {
      "name": "Lukas Ecker"
    },
    {
      "name": "Thomas Voglhuber-Brunnmaier"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5yx95y6ftj5hs.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.07930",
  "fulltext_url": null,
  "id": "5yx95y6ftj5hs",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.07930",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "math.OC"
    ],
    [
      "openalex",
      "2208|Advanced DC-DC Converters"
    ]
  ],
  "openalex": "W7220902457",
  "pdf_url": "https://arxiv.org/pdf/2610.07930",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5yx95y6ftj5hs.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:26Z",
      "native_id": "2610.07930",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.07930"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.OC",
      "subfield": "optimisation-control"
    }
  ],
  "title": "Adaptive Average Current-Mode Control of a Buck Converter Supplying Plasma Arc Loads",
  "title_text": "Adaptive Average Current-Mode Control of a Buck Converter Supplying Plasma Arc Loads",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:26Z",
  "url": "https://research.draconitic.com/paper/5yx95y6ftj5hs",
  "venue": "arXiv",
  "versions": []
}