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A New Robust Digital Non-Linear Control for Power Factor Correction—Arc Welding Applications

Author

Listed:
  • Quentin Bellec

    (IREENA—University of Nantes, 37 Boulevard de L’université—BP406, 44602 Saint-Nazaire CEDEX, France
    GYS, Research Department, 1 rue de la Croix des Landes CS 54159, 53941 Saint-Berthevin CEDEX, France)

  • Jean-Claude Le Claire

    (IREENA—University of Nantes, 37 Boulevard de L’université—BP406, 44602 Saint-Nazaire CEDEX, France)

  • Mohamed Fouad Benkhoris

    (IREENA—University of Nantes, 37 Boulevard de L’université—BP406, 44602 Saint-Nazaire CEDEX, France)

  • Peyofougou Coulibaly

    (GYS, Research Department, 1 rue de la Croix des Landes CS 54159, 53941 Saint-Berthevin CEDEX, France)

Abstract

A welding power source is commonly assimilated to a non-linear load. Arc welding market being in full growth, the resulting harmonic pollution is becoming an increasingly difficult problem to ignore. Therefore, the main purpose of this work is to define and implement the most suitable solution for power factor correction in a welding power source. Due to the high non-linearity of the electric arc, the current controller used to control grid current need to show high robustness. Consequently, this paper focuses on the digitization of a very robust Phase-Shift Self-Oscillating Current Controller (PSSOCC), which only exists in its analog version until then, to carry out this task. After quick descriptions of the entire energy conversion chain and the PSSOCC operation principle, a model of the digital PSSOCC is proposed. Then, the quality and the accuracy of the aforementioned model are evaluated and its operating limits are identified. Afterwards, the behavior of the digital controller is studied within a Power Factor Correction (PFC) regulation for several specific arc welding operating modes. Finally, excellent robustness of this new FPGA-based digital current controller, named DPSSOCC, is confirmed on a three-phase Vienna converter test bench.

Suggested Citation

  • Quentin Bellec & Jean-Claude Le Claire & Mohamed Fouad Benkhoris & Peyofougou Coulibaly, 2021. "A New Robust Digital Non-Linear Control for Power Factor Correction—Arc Welding Applications," Energies, MDPI, vol. 14(4), pages 1-25, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:991-:d:499092
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    References listed on IDEAS

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    1. Zhaoxu Luo & Mei Su & Jian Yang & Yao Sun & Xiaochao Hou & Josep M. Guerrero, 2016. "A Repetitive Control Scheme Aimed at Compensating the 6 k + 1 Harmonics for a Three-Phase Hybrid Active Filter," Energies, MDPI, vol. 9(10), pages 1-17, September.
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