A 6.6kW High Power Density Bi-directional EV On-Board Charger Based on SiC MOSFETs

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 7Sprache: EnglischTyp: PDF

Wei, Chen; Zhu, Dongfeng; Xie, Haitao (Wolfspeed, A Cree Company, China)
Shao, Jianwen (Wolfspeed, A Cree Company, USA)

This paper presents a SiC MOSFET-based 6.6 kW bi-directional Electric Vehicle (EV) on-board charger (OBC), with high efficiency and high power density. A digital controlled prototype with a switching frequency of 67kHz for CCM totem pole PFC, and 150kHz-300kHz for a CLLC resonant converter is demonstrated with 54W/in3 power density exceeding 96.5% in peak efficiency. In order to achieve a high power density, all SiC MOSFETs are mounted on a tooled AL heat sink, with all magnetics potted internally. MOSFETs and magnetics meet thermal requirements on a 65deg C cooling plate.