Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications

Hakan Akca; Ahmet Aktas

doi:10.11121/ijocta.1503

Authors

Hakan Akca Department of Electrical and Electronics Engineering, Faculty of Engineering, Ege University, 35040, Izmir, Türkiye https://orcid.org/0000-0003-1027-1579
Ahmet Aktas Department of Energy Systems Engineering, Faculty of Technology, Gazi University, 06560, Ankara, Türkiye https://orcid.org/0000-0003-1027-1579

DOI:

https://doi.org/10.11121/ijocta.1503

Keywords:

Wireless power transfer, Electric vehicle, Asynchronous buck converter, Synchronous buck converter, Interleaved synchronous buck converter

Abstract

The studies on Wireless Power Transfer (WPT) technology and peripherals in Electric Vehicle (EV) applications are intensifying. While the energy received from the WPT system is transferred to the EV battery, the direct current (dc)/dc converter circuits are used. The dc/dc buck converter topologies are one of them. The converter circuits must be highly efficient, lightweight, and compact to have a high range in EV vehicles. There are asynchronous buck, synchronous buck, and interleaved synchronous buck converter circuit topologies from the literature. In this study, the efficiency results of these circuit topologies were analyzed using MATLAB/Simulink and experimental studies. This study contributes to the literature by conducting circuit-level efficiency analysis and component-level power loss analysis. It has been observed that the interleaved synchronous buck converter circuit operates at 99% efficiency at 1066 W. In addition, it has been shared with the oscilloscope results that the current ripples of this circuit topology are lower than other circuit converters. Specifically, there has been a significant reduction of 56% in power losses, particularly in the interleaved synchronous buck converter (ISBC). This study analyzes the dynamic behavior of the dc/dc buck converter topologies, and results about their performance are given.

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Author Biographies

Hakan Akca, Department of Electrical and Electronics Engineering, Faculty of Engineering, Ege University, 35040, Izmir, Türkiye

Hakan Akca received the Bachelor’s degree in Department of Electrical and Electronics Engineering at Selcuk University, Konya, Turkey, in 2009. Subsequently, he received his Masters and Ph.D. degrees in Department of Electrical Engineering, at Yildiz Technical University, Istanbul, Turkey, in 2011 and 2017, respectively. Currently serving as an Assistant Professor in the Department of Electrical and Electronics Engineering at Ege University in Izmir, Turkey. His research interests include power converters, renewable energy sources, and electric vehicles. Ongoing projects include the wireless charging of electric vehicle batteries in a photovoltaic solar panel and grid-powered system. He is currently continuing project studies on wireless charging system for electric vehicles based on photovoltaic integrated and grid connected, supported by The Scientific and Technological Research Council of Turkey.

Ahmet Aktas, Department of Energy Systems Engineering, Faculty of Technology, Gazi University, 06560, Ankara, Türkiye

Ahmet Aktas received his B.Sc. in Electrical Education from Kocaeli University in 2010. He received the M.Sc. degree from the Department of Energy Systems Engineering, Kocaeli University 2013. Finally, he got his PhD in Energy Systems Engineering at Kocaeli University in 2016. He is an Associate Professor Doctor with the Department of Energy Systems Engineering, Technology Faculty, Gazi University, Turkey. He has published many papers on different subjects, including multilevel inverters, photovoltaic power generation systems, renewable energy sources, energy management, energy storage technologies, battery and ultracapacitor modeling, smart energy management, microcontroller programming, smart grid integration, microprocessor-based application systems, offshore wind turbine, and marine current energy. He carried out project management on offshore wind, marine current flow, and hybrid energy storage systems supported by The Scientific and Technological Research Council of Turkey. He worked as a postdoctoral researcher at Oak Ridge National Laboratory and the University of Tennessee to study wireless power transfer for electric vehicles.

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