A Novel Bidirectional-Switched-Capacitor-Based Interlaced DC-DC Converter

Kuo Kai Shyu, Yi Chang Yu, Xin Lan Lin, Lung Hao Lee, Po Lei Lee

Research output: Contribution to journalArticlepeer-review

Abstract

This study proposes a novel bidirectional-switched-capacitor-based interleaved converter. In view of the shortcomings of the two well-known unidirectional-switched-capacitor-based interleaved converters, this study improves such converters through combining the novel structure of a switched capacitor circuit. The first effort was to overcome the drawback of the Cockcroft–Walton-based interleaved converter, whose circuit impedance and ripple cause a serious output voltage drop. The second was to solve the Dickson-based interleaved converter with its capacitors subjected to high-voltage stress. The third was to relax the unidirectional boost function of the Cockcroft–Walton- or Dickson-based interleaved converter. This study avoided not only high-circuit impedance and ripple, as in the case of the Cockcroft–Walton converter, but also it had lower component stress than the Dickson converter. In addition, this study redesigned the unidirectional boost function of the Cockcroft–Walton- or Dickson-based interleaved converter, such that the switch-capacitor-based interleaved converters became bidirectional DC-DC converters. Finally, the experimental results are provided to verify the feasibility of the proposed method.

Original languageEnglish
Article number792
JournalElectronics (Switzerland)
Volume12
Issue number4
DOIs
StatePublished - Feb 2023

Keywords

  • bidirectional DC-DC converter
  • high-voltage conversion ratio
  • interleaved converter
  • switched capacitor voltage multiplier

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