A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles
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 auxiliar...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/12/3603 |
| _version_ | 1797529830574522368 |
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| author | Vu-Hai Nam Duong-Van Tinh Woojin Choi |
| author_facet | Vu-Hai Nam Duong-Van Tinh Woojin Choi |
| author_sort | Vu-Hai Nam |
| collection | DOAJ |
| description | 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%. |
| first_indexed | 2024-03-10T10:19:26Z |
| format | Article |
| id | doaj.art-4ff6c128574e42dfb5146ef2dcf7b9e6 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T10:19:26Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-4ff6c128574e42dfb5146ef2dcf7b9e62023-11-22T00:30:19ZengMDPI AGEnergies1996-10732021-06-011412360310.3390/en14123603A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric VehiclesVu-Hai Nam0Duong-Van Tinh1Woojin Choi2Department of Electrical Engineering, Soongsil University, Seoul 06978, KoreaDepartment of Electrical Engineering, Soongsil University, Seoul 06978, KoreaDepartment of Electrical Engineering, Soongsil University, Seoul 06978, KoreaRecently, 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%.https://www.mdpi.com/1996-1073/14/12/3603active clamphybrid converterLDC converterPSFB converterminimized circulating currentZero-Voltage Switching (ZVS) |
| spellingShingle | Vu-Hai Nam Duong-Van Tinh Woojin Choi A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles Energies active clamp hybrid converter LDC converter PSFB converter minimized circulating current Zero-Voltage Switching (ZVS) |
| title | A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles |
| title_full | A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles |
| title_fullStr | A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles |
| title_full_unstemmed | A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles |
| title_short | A Novel Hybrid LDC Converter Topology for the Integrated On-Board Charger of Electric Vehicles |
| title_sort | novel hybrid ldc converter topology for the integrated on board charger of electric vehicles |
| topic | active clamp hybrid converter LDC converter PSFB converter minimized circulating current Zero-Voltage Switching (ZVS) |
| url | https://www.mdpi.com/1996-1073/14/12/3603 |
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