The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Phase-Shifted Full-Bridge Converter for Welding Power Supply Capable of Using 220 V, 440 V 3-Phase Grid Voltages

220V, 440V 3상 계통전압 혼용이 가능한 용접 전원장치용 위상천이 풀브리지 컨버터

  • Yun, Duk-Hyeon (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Woo-Seok (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Il-Oun (Dept. of Electrical Engineering, Myongji University)
  • Received : 2020.11.30
  • Accepted : 2020.12.29
  • Published : 2021.10.20
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Abstract

A three-leg inverter-type isolated DC-DC Converter that can use 220 and 440 V grid input voltages is introduced. The secondary circuit structure of the proposed topology is center-tap, which is the same as the conventional phase-shifted full-bridge converter. However, the primary circuit structure is composed of a three-leg inverter structure and a transformer, in which two primary windings are connected in series. The proposed circuit structure has a wider input voltage range than the conventional phase-shifted full-bridge converter, and the circulating-current on the primary-side is reduced. In addition, the voltage stress at the secondary rectifier is greatly improved, and high efficiency can be achieved at a high input voltage by removing the snubber circuit added to the conventional converter. Prototype converters with input DC of 311 V, output of 622 V, and 50 V and 6 kW class specifications were designed and manufactured to verify the validity of the proposed topology; the experimental results are presented.

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Acknowledgement

본 연구는 한국전력공사의 2021년 선정 기초연구개발과제 연구비에 의해 지원되었음. (과제번호: R21XO01-11)

References

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  2. S. W. Choi, J. M. Lee, and J. Y. Lee, "High-efficiency portable welding machine based on full-bridge converter with ISOP-connected single transformer and active snubber," IEEE Transactions on Industrial Electronics, Vol. 63, No. 8, pp. 4868-4877, 2016. https://doi.org/10.1109/TIE.2016.2554100
  3. W. Y. Ahn, W. K Lee, and M. S. Han, "Characteristics of inverter type arc welding power source," Journal of the Korean Power Electronics Society, Vol. 19, No. 3, pp. 38-46, 2014.