Current‑balancing strategy for multileg interleaved DC/DC converters of electric‑vehicle chargers

Hye-Won Choi; Seok-Min Kim; Jinwoo Kim; Younghoon Cho; Kyo-Beum Lee

Current‑balancing strategy for multileg interleaved DC/DC converters of electric‑vehicle chargers

Vol. 21, No. 1, pp. 94-102, Jan. 2021

10.1007/s43236-020-00172-x

Current-balancing strategy

Multileg interleaved converter

Reducing current ripple

Electric vehicle charger

Abstract

A current-balancing strategy for a multileg interleaved DC/DC converter with a reduced number of current sensors for electric-vehicle chargers is proposed in this paper. There are imbalances between the leg currents of multileg DC/DC converters, which are caused by the difference between the leg impedances and the driver delay. Each of the leg current sensors must achieve current balancing. However, the conventional strategy is burdensome due to its high cost and volume. To mitigate these issues, the proposed balancing strategy effectively balances leg currents using fewer current sensors than the number of legs. The proposed strategy was verified by various simulation and experimental results.

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Cite this article

[IEEE Style]

H. Choi, S. Kim, J. Kim, Y. Cho, K. Lee, "Current‑balancing strategy for multileg interleaved DC/DC converters of electric‑vehicle chargers," Journal of Power Electronics, vol. 21, no. 1, pp. 94-102, 2021. DOI: 10.1007/s43236-020-00172-x.

[ACM Style]

Hye-Won Choi, Seok-Min Kim, Jinwoo Kim, Younghoon Cho, and Kyo-Beum Lee. 2021. Current‑balancing strategy for multileg interleaved DC/DC converters of electric‑vehicle chargers. Journal of Power Electronics, 21, 1, (2021), 94-102. DOI: 10.1007/s43236-020-00172-x.