A switched-capacitor bidirectional DC-DC converter with wide voltage gain range for electric vehicles with hybrid energy sources

Zhang, Yun; Gao, Yongpin; Zhou, Lei; Sumner, M.

Abstract

A switched-capacitor bidirectional DC-DC converter with a high step-up/step-down voltage gain is proposed for electric vehicles (EVs) with a hybrid energy source system (HESS). The converter presented has the advantages of being a simple circuit, a reduced number of components, a wide voltage-gain range, a low voltage stress, and a common ground. In addition, the synchronous rectifiers allow zero voltage switching (ZVS) turn-on and turn-off without requiring any extra hardware, and the efficiency of the converter is improved. A 300W prototype has been developed which validates the wide voltage-gain range of this converter using a variable low-voltage side (40V-100V) and to give a constant high-voltage side (300V). The maximum efficiency of the converter is 94.45% in step-down mode and 94.39% in step-up mode. The experimental results also validate the feasibility and the effectiveness of the proposed topology.

• Journal Article Type: Article
• Acceptance Date: Dec 22, 2017
• Online Publication Date: Jan 1, 2018
• Deposit Date: Jan 30, 2018
• Publicly Available Date: Jan 30, 2018
• Journal: IEEE Transactions on Power Electronics
• Print ISSN: 0885-8993
• Electronic ISSN: 1941-0107
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: PP
• Issue: 99
• DOI: https://doi.org/10.1109/TPEL.2017.2788436
• Keywords: Bidirectional DC-DC converter, EVs, HESS, Switched-capacitor, Synchronous rectification, Wide voltage-gain range
• Public URL: https://nottingham-repository.worktribe.com/output/902390
• Publisher URL: http://ieeexplore.ieee.org/document/8242681/
• Additional Information: This is an accepted version of the following article: Y. Zhang, Y. Gao, L. Zhou and M. Sumner, "A Switched-Capacitor Bidirectional DC-DC Converter with Wide Voltage Gain Range for Electric Vehicles with Hybrid Energy Sources," in IEEE Transactions on Power Electronics, vol. PP, no. 99, pp. 1-1.; doi: 10.1109/TPEL.2017.2788436 © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.