Abstract
The increasing power levels handled by electric vehicle dc fast chargers will impose additional challenges to the switching devices in order to cope with the efficiency requirements. A cost-effective alternative to achieve highly efficient power conversion is through the partial-power conversion concept. This paper validates the advantages of a step-down Type II partial-power converter (PPC), based on the phase-shifted fullbridge converter, for EV Fast Chargers. By exploiting the reduced voltage range of an EV battery pack along with the reduced power ratio for a Type II PPC, an extremely efficient charging process can be achieved. The concept is validated with the development of a 7 kW demonstrator, hence realistic efficiency measurements are obtained. Results indicate the effectiveness of charging a battery by merely handling 13.32% of the power provided to it, with a peak efficiency of 99.11%
Original language | English |
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Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
Volume | 10 |
Issue number | 6 |
Pages (from-to) | 7839 - 7848 |
ISSN | 2168-6777 |
DOIs | |
Publication status | Published - 2022 |
Keywords
- Battery charging
- DC-DC power conversion
- Fast charger
- High Efficiency
- Partial-power converters (PPCs)