Design of a welding power supply with wide input voltage range

Jin-Su Kim; Young-Joo Kim; Seung-Min Nam; Dae-Young Hong; So-Jeong Kong; Jun-Young Lee

Design of a welding power supply with wide input voltage range

Vol. 23, No. 7, pp. 1141-1149, Jul. 2023

10.1007/s43236-023-00639-7

Phase-shifted

Full-bridge converter

Path switch

Welding machine

Abstract

This paper proposes a power supply for welding that can adapt to a wide range of input voltages. The phase-shifted fullbridge (PSFB) converter, which is widely used as a welding power supply, is not suitable for applications where there is a wide input voltage range because of an increase in the circulating current and high-voltage stresses on the switch devices when a high input voltage is applied. To address this issue, a method to change the structure based on the input voltage is proposed by dividing the primary-side high-frequency inverter stage of the PSFB converter into two and adding path switches that can be configured in series or in parallel. The proposed circuit can lower the switch devices withstand voltage through structural changes and operate in a duty ratio with narrow fluctuations on the wide input voltage, which helps to improve the overall efficiency. The validity of the proposed method was verified through a comparison with existing topologies on a 6.6 kW prototype.

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Cite this article

[IEEE Style]

J. Kim, Y. Kim, S. Nam, D. Hong, S. Kong, J. Lee, "Design of a welding power supply with wide input voltage range," Journal of Power Electronics, vol. 23, no. 7, pp. 1141-1149, 2023. DOI: 10.1007/s43236-023-00639-7.

[ACM Style]

Jin-Su Kim, Young-Joo Kim, Seung-Min Nam, Dae-Young Hong, So-Jeong Kong, and Jun-Young Lee. 2023. Design of a welding power supply with wide input voltage range. Journal of Power Electronics, 23, 7, (2023), 1141-1149. DOI: 10.1007/s43236-023-00639-7.