Title: Analysis and design for interleaved ZCS buck DC-DC converter with low switching losses

Authors: Khairy Sayed; Emad H. El-Zohri; Hedra Mahfouz

Addresses: Department of Electrical Engineering, Faculty of Engineering, Sohag University, Sohag, Egypt ' Department of Electrical Engineering, Faculty of Industrial Education, Sohag University, Sohag, Egypt ' Department of Electrical Engineering, Faculty of Industrial Education, Sohag University, Sohag, Egypt

Abstract: This paper presents an interleaved buck DC-DC converter using zero current switching (ZCS) resonant with additional inductor and capacitor that mainly used for battery charging applications. The proposed novel converter has advantages of its simplicity, low cost, high efficiency and behaviour of easy control under the (ZCS) condition so that reducing the switching losses. Therefore, the proposed converter offers lower switching losses with a higher power density. The performance of the converter system is improved using coupled inductors. These coupled inductors reduce the magnetic size and also improve the converter's transient performance without increasing the steady-state current ripple. The detailed study of operating principle and design considerations is presented. The effectiveness of the proposed control scheme is demonstrated through PSIM simulations. Calculated efficiency of the converter is ensured about 94%, which is substantially considered to be a satisfactory performance.

Keywords: coupled inductors; interleaved buck DC-DC converter; soft switching; zero current switching.

DOI: 10.1504/IJPELEC.2017.085076

International Journal of Power Electronics, 2017 Vol.8 No.3, pp.210 - 231

Received: 14 Dec 2015
Accepted: 10 Jan 2017
Published online: 10 Jul 2017 *

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