A SiC Based High Efficiency 22kW Bi-directional EV On-Board Charger
Conference: PCIM Europe digital days 2021 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/03/2021 - 05/07/2021 at Online
Proceedings: PCIM Europe digital days 2021
Pages: 7Language: englishTyp: PDF
Authors:
Wei, Chen; Xie, Haitao; Liu, Ying; Hu, Zongzeng (Wolfspeed, A Cree Company, China)
Shao, Jianwen (Wolfspeed, A Cree Company, USA)
Abstract:
This paper presents a SiC MOSFET - based 22 kW bi-directional on-board charger (OBC) for Electric Vehicle (EV), with high efficiency and wide output voltage range. To achieve high efficiency in both charging and discharging mode, and to support both 3 phases AC input and single-phase AC input, a novel flexible control scheme is presented in the paper. A digital controlled prototype with a switching frequency of 140kHz-250kHz for CLLC converter and 45kHz for the Active Front End (AFE) is demonstrated with exceeding 97% in peak efficiency in both charging and discharging mode.