Single‑phase and three‑phase compatible isolated on‑board charging system

Kai Zhou; Yuxin Zhang; Simin Chen

Single‑phase and three‑phase compatible isolated on‑board charging system

Kai Zhou

Yuxin Zhang

Simin Chen

Vol. 24, No. 11, pp. 1695-1706, Nov. 2024

10.1007/s43236-024-00832-2

On-board charging system

Single-phase and three-phase compatible

Power factor correction

Resonant converter

Double closed-loop control

Abstract

Aiming at the problem caused by the fact that traditional on-board charging systems (OBC) usually use a single form of AC input, this research suggests a suitable isolated OBC for single-phase and three-phase power sources. It adopts a two-stage structure. The front stage can switch between diff erent input modes. Using a single-phase AC input mode, the front stage is a totem pole bridgeless cascade Boost circuit for power factor correction (PFC). It can be switched to a three-phase six-switch PFC circuit in a three-phase AC input mode. A full-bridge LLC resonant converter serves as the rear stage. The system adopts a double closed-loop control strategy and a mixed control mode that consists of pulse width modulation (PWM) and pulse frequency modulation (PFM). In either the single-phase or three-phase AC input mode, the front stage PFC circuit can output a 700 V DC bus voltage, and keep the input current and input voltage in phase. It is possible to achieve soft switching in the rear stage resonant converter, and to output a wide range of voltage to charge the power battery. According to a theoretical analysis, a system simulation model is built and an experimental prototype of the OBC is produced. The accuracies of the simulation and the theoretical analysis are confi rmed by experimental findings.

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Cite this article

[IEEE Style]

K. Zhou, Y. Zhang, S. Chen, "Single‑phase and three‑phase compatible isolated on‑board charging system," Journal of Power Electronics, vol. 24, no. 11, pp. 1695-1706, 2024. DOI: 10.1007/s43236-024-00832-2.

[ACM Style]

Kai Zhou, Yuxin Zhang, and Simin Chen. 2024. Single‑phase and three‑phase compatible isolated on‑board charging system. Journal of Power Electronics, 24, 11, (2024), 1695-1706. DOI: 10.1007/s43236-024-00832-2.