A wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with a common ground for energy storage systems

Yun Zhang, Yongping Gao, Jing Li, Mark Sumner

Research output: Journal PublicationArticlepeer-review

3 Citations (Scopus)
1 Downloads (Pure)

Abstract

A wide-voltage-conversion range bidirectional DC-DC converter is proposed in this paper. The topology is comprised of one typical LC energy storage component and a special common grounded asymmetric H-bridge with four active power switches/anti-parallel diodes. The narrow output PWM voltage is generated from the voltage difference between two normal (wider) output PWM voltages from the asymmetric H-bridge with duty cycles close to 0.5. The equivalent switching frequency of the output PWM voltage is double the actual switching frequency, and a wide step-down/step-up ratio range is achieved. A 300W prototype has been constructed to validate the feasibility and effectiveness of the proposed bidirectional converter between the variable low voltage side (24V~48V) and the constant high voltage side (200V). The slave active power switches allow ZVS turn-on and turn-off without requiring any extra hardware. The maximum conversion efficiency is 94.7% in the step-down mode and 93.5% in the step-up mode. Therefore, the proposed bidirectional topology with a common ground is suitable for energy storage systems such as renewable power generation systems and electric vehicles with a hybrid energy source.

Original languageEnglish
Article numberJPE 18-2-3
Pages (from-to)343-355
Number of pages13
JournalJournal of Power Electronics
Volume18
Issue number2
DOIs
Publication statusPublished - Mar 2018

Keywords

  • Asymmetric H-bridge
  • Bidirectional DC-DC converter
  • Common ground
  • Energy storage systems
  • Wide voltage-gain range

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with a common ground for energy storage systems'. Together they form a unique fingerprint.

Cite this