Hybrid Switched-Capacitor/Switched-Quasi-Z-Source Bidirectional DC-DC Converter with a Wide Voltage Gain Range for Hybrid Energy Sources EVs

Yun Zhang, Qiangqiang Liu, Yongping Gao, Jing Li, Mark Sumner

Research output: Journal PublicationArticlepeer-review

49 Citations (Scopus)

Abstract

In this paper, a hybrid switched-capacitor/switched-quasi-Z-source bidirectional dc-dc converter is proposed for electric vehicles (EVs) with hybrid energy sources, which has a wide voltage gain range in the bidirectional energy flows. Compared with the traditional quasi-Z-source bidirectional dc-dc converter, the proposed converter only changes the position of the main power switch and employs a switched-capacitor cell at the output of the high-voltage side. Therefore, the advantages of the wide voltage gain range and the lower voltage stresses across the power switches can be achieved. The operating principle, the voltage and current stresses across the power switches, and the comparisons with other converters are analyzed in detail. Furthermore, the parameter design of the main components, the dynamic modeling analysis, and the voltage control scheme are also presented. Finally, the experimental results obtained from a 400 W prototype validate the characteristics and the theoretical analysis of the proposed converter.

Original languageEnglish
Article number8400594
Pages (from-to)2680-2690
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number4
DOIs
Publication statusPublished - Apr 2019

Keywords

  • Bidirectional DC-DC converter
  • electric vehicles (EVs)
  • hybrid energy sources
  • switched-capacitor
  • switched-quasi-Z-source
  • wide voltage gain range

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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