382 Int. J. Power Electronics, Vol. 11, No. 3, 2020 Copyright © 2020 Inderscience Enterprises Ltd. Non-isolated high gain bidirectional DC-DC converter: design and implementation Adel Karami, Ali Nahavandi* and Bahman Eskandari Faculty of Engineering, Malayer University, Malayer, 0098, Iran Email: adel.karami.bargh88@gmail.com Email: ali_nahavandi1362@yahoo.com Email: ali.nahavandi@malayeru.ac.ir Email: b.eskandari@malayeru.ac.ir *Corresponding author Abstract: This paper proposed a non-isolated bidirectional dc-dc converter with high step-up/down voltage gain. This converter has the ability to transfer the energy in both directions. The proposed converter uses three inductors that are coupled together pairwise with same winding turns. In step-up mode; the inductors operate in parallel in charging mode and series in discharging mode. In step-down mode; the inductors operate in series to be charged and parallel to be discharged. The proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc-dc boost/buck converter. Simulations are obtained by using PSCAD/EMTDC software and the results are presented. Finally, a laboratory prototype is implemented to validate theoretical analysis. Keywords: non-isolated; bidirectional dc-dc converter; coupled inductors. Reference to this paper should be made as follows: Karami, A., Nahavandi, A. and Eskandari, B. (2020) ‘Non-isolated high gain bidirectional DC-DC converter: design and implementation’, Int. J. Power Electronics, Vol. 11, No. 3, pp.382–408. Biographical notes: Adel Karami received BSc in Electrical Engineering from University of Kurdestan, Sanandaj, Iran in 2013. He received MSc in Electrical Power Engineering from Malayer University, Malayer, Iran in 2017. Ali Nahavandi received his BSc, MSc and PhD degrees all in Electrical Power Engineering from the University of Tabriz, Tabriz, Iran, in 2006, 2008 and 2014, respectively. He is currently an Assistant Professor at Faculty of Engineering, Malayer University, Malayer, Iran. Bahman Eskandari received his BSc, MSc and PhD degrees all in Electrical Power Engineering from K.N. Toosi University of Technology, Tehran, Iran, in 2005, 2007 and 2013, respectively. He is currently an Assistant Professor at Faculty of Engineering, Malayer University, Malayer, Iran.