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Dr. Lizana-Fuentes, Ricardo
Research Outputs
Partial-power converter topology of type II for efficient electric vehicle fast charging
2022, Dr. Lizana-Fuentes, Ricardo, Rivera, Sebastian, Rojas, Julian, Kouro, Samir, Lehn, Peter, Renaudineau, Hugues, Dragicevic, Tomislav
The increasing power levels handled by electric vehicle (EV) 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 article validates the advantages of a step-down Type II partial-power converter (PPC), based on the phase-shifted full-bridge 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, and 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%.