Three‑phase 11 kW on‑board charger with single‑phase reverse function

This paper presents an 11 kW bidirectional on-board charger (OBC) design method with a single-phase discharge mode. The proposed OBC comprises an inverter, bidirectional LLC resonant converter, and buck converter. Different from the conventional bidirectional CLLLC resonant converter, power is controlled using a buck converter during reverse operation; therefore, considering the reverse gain when designing the LLC resonant converter is unnecessary. In addition, because the proposed method is designed by optimizing the forward direction, it can freely select a switching frequency, and the size of the magnetic components can be reduced, improving the power density. The validity of the proposed circuit is verified via a prototype OBC, with a grid voltage of 3 phase 380 VAC and a battery voltage of 270–464 V.

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Cite this article

[IEEE Style]

S. Mun, S. Choi, D. Hong, S. Kong, J. Lee, "Three‑phase 11 kW on‑board charger with single‑phase reverse function," Journal of Power Electronics, vol. 22, no. 8, pp. 1255-1264, 2022. DOI: 10.1007/s43236-022-00457-3.

[ACM Style]

Seung-Hwan Mun, Seung-Won Choi, Dae-Young Hong, So-Jeong Kong, and Jun-Young Lee. 2022. Three‑phase 11 kW on‑board charger with single‑phase reverse function. Journal of Power Electronics, 22, 8, (2022), 1255-1264. DOI: 10.1007/s43236-022-00457-3.