Design of a 120V, 5A SEPIC DC-DC Converter for Unipolar 120V DC Microgrid

Authors

  • Abdulkareem Mokif Obais Department of Biomedical Engineering, University of Babylon, Al-Hilla, Babylon, Iraq
  • Ali Abdulkareem Mukheef Department of English, University of Babylon, Al-Hilla, Babylon, Iraq

DOI:

https://doi.org/10.26740/vubeta.v2i3.44140

Keywords:

DC-DC converters, DC Microgids, Self-protection, SEPIC Converters, Unipolar Microgrids

Abstract

SEPIC is a DC-DC converter that functions in both boost and buck modes, reducing voltage stress on active power switches. It is utilized in electric vehicles, marine vessels, and aircraft to minimize dimensions, mass, maintenance, and operational expenses while enhancing efficiency, safety, and dependability. DC microgrids, characterized by their straightforward topology and economical materials, provide enhanced efficiency relative to AC microgrids. The previous literatures concerning SEPIC converters and DC-DC microgrid’s applications are reviewed in this work. This paper presents a SEPIC-based DC-DC converter designed for direct connection to a unipolar 120V DC microgrid and capable of delivering 600W of DC power. It is outfitted with a current sensor and a protective switch to provide self-protection against microgrid disturbances, such as brief short circuits. The converter has been designed and evaluated using PSpice. The simulation results confirmed the design methods of the proposed converter and demonstrated effective protection against high current events.

Author Biographies

Abdulkareem Mokif Obais, Department of Biomedical Engineering, University of Babylon, Al-Hilla, Babylon, Iraq

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Abdulkareem Mokif Obais mceclip4-2ba441f1624d9e6c0375799eb1aef8c1.png was born in Iraq in 1960. He received his BSc. and M.Sc. degrees in Electrical Engineering from the University of Baghdad, Baghdad, Iraq, in 1982 and 1987, respectively. He received his PhD degree in Electrical Engineering from Universiti Tenaga Nasional, Kajang, Malaysia in 2013. He is interested in electronic circuit’s design and power electronics. He had supervised and examined a number of postgraduate students. He had published many papers in Iraqi academic and international Journals. Dr. Obais was promoted to Professor at University of Babylon in April 2008.

Ali Abdulkareem Mukheef, Department of English, University of Babylon, Al-Hilla, Babylon, Iraq

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Ali Abdulkareem Mukheef mceclip1-81554e847228f59f9766571ba8639313.png was born in Iraq in 1995. He received his BSc. and M.Sc. degrees from the University of Babylon, Iraq in 2016 and 2020, respectively. He works as an academic staff member in the Department of English at the University of Babylon, located in Al-Hilla, Babylon, Iraq. Right now, he's in Babylon, Iraq, at the University of Babylon getting ready for his PhD degree. He had published several papers in respected database international journals.

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Published

2025-09-05

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[1]
A. M. Obais and A. A. Mukheef, “Design of a 120V, 5A SEPIC DC-DC Converter for Unipolar 120V DC Microgrid ”, Vokasi Unesa Bull. Eng. Technol. Appl. Sci., vol. 2, no. 3, pp. 655–665, Sep. 2025.

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Vol. 2 No. 3 (2025)

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Copyright (c) 2025 Abdulkareem Mokif Obais, Ali Abdulkareem Mukheef

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