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A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles

Author

Listed:
  • Vu-Hai Nam

    (Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea
    Control Techniques and Innovation Laboratory for Electric Vehicles, School of Electrical Engineering, Hanoi University of Science and Technology, Hanoi 10000, Vietnam)

  • Duong-Van Tinh

    (Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea)

  • Woojin Choi

    (Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea)

Abstract

Recently, the integrated On-Board Charger (OBC) combining an OBC converter with a Low-Voltage DC/DC Converter (LDC) has been considered to reduce the size, weight and cost of DC-DC converters in the EV system. This paper proposes a new integrated OBC converter with V2G (Vehicle-to-Grid) and auxiliary battery charge functions. In the proposed integrated OBC converter, the OBC converter is composed of a bidirectional full-bridge converter with an active clamp circuit and a hybrid LDC converter with a Phase-Shift Full-Bridge (PSFB) converter and a forward converter. ZVS for all primary switches and nearly ZCS for the lagging switches can be achieved for all the operating conditions. In the secondary side of the proposed LDC converter, an additional circuit composed of a capacitor and two diodes is employed to clamp the oscillation voltage across rectifier diodes and to eliminate the circulating current. Since the output capacitor of the forward converter is connected in series with the output capacitor of the auxiliary battery charger, the energy from the propulsion battery can be delivered to the auxiliary battery during the freewheeling interval and it helps reduce the current ripple of the output inductor, leading to a smaller volume of the output inductor. A 1 kW prototype converter is implemented to verify the performance of the proposed topology. The maximum efficiency of the proposed converter achieved by the experiments is 96%.

Suggested Citation

  • Vu-Hai Nam & Duong-Van Tinh & Woojin Choi, 2021. "A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles," Energies, MDPI, vol. 14(12), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3603-:d:576546
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    References listed on IDEAS

    as
    1. Duong Tran & Nam Vu & Woojin Choi, 2018. "A Quasi-Resonant ZVZCS Phase-Shifted Full-Bridge Converter with an Active Clamp in the Secondary Side," Energies, MDPI, vol. 11(11), pages 1-21, October.
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    Cited by:

    1. Huaibao Wang & Sheng Wang & Hao Ding & Changli Shi & Dongqiang Jia & Chao Chen & Josep M. Guerrero, 2022. "An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter," Energies, MDPI, vol. 15(7), pages 1-14, April.
    2. Namala Narasimhulu & Mohan Awasthy & Rocío Pérez de Prado & Parameshachari Bidare Divakarachari & Nadimapalli Himabindu, 2023. "Analysis and Impacts of Grid Integrated Photo-Voltaic and Electric Vehicle on Power Quality Issues," Energies, MDPI, vol. 16(2), pages 1-18, January.
    3. Shahid Jaman & Sajib Chakraborty & Dai-Duong Tran & Thomas Geury & Mohamed El Baghdadi & Omar Hegazy, 2022. "Review on Integrated On-Board Charger-Traction Systems: V2G Topologies, Control Approaches, Standards and Power Density State-of-the-Art for Electric Vehicle," Energies, MDPI, vol. 15(15), pages 1-38, July.

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