A Fluxgate-based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • Guanqun Qiu
  • Ran Li
  • Haolu Feng
  • Huaping Jiang
  • Teng Long
  • WeiHua Shao
  • Xu Hou


A concern with the isolation transformer in a dual active bridge (DAB) DC-DC converter is the DC bias in magnetization. This paper proposes a fluxgate-based current sensor to measure the DC component mixed with a large, high-frequency AC current. Compared with a commercial Hall effect current sensor, the proposed sensor significantly reduces measurement error. This paper presents the working principle and design considerations. A prototype is demonstrated for DC bias elimination control in a DAB converter.

Bibliographical metadata

Original languageEnglish
JournalIEEE Transactions on Power Electronics
Early online date21 Sep 2021
Publication statusPublished - 21 Sep 2021