Abstract:

Contrasting traditional two-stage chargers, single stage chargers have great commercial value and development potential in the contemporary electric vehicle industry, due to their high- power density benefits. Nevertheless, they are accompanied by several challenges, including an excessive quantity of switches, significant conduction loss, and a singular objective charge– discharge control strategy. In response to these challenges, this study explores a charging pile scheme characterized by high power density and minimal conduction loss, predicated on a single- stage ac/dc matrix dual active bridge (M-DAB) converter. The optimal modulation strategy for mitigating conduction loss is analyzed, and a hybrid charge–discharge control strategy encompassing six control objectives is proposed. To authenticate the effectiveness of the scheme, an experimental prototype is constructed. A comparative analysis of data from recent charging pile research substantiates that the scheme investigated in this study exhibits promising application prospects and market potential. Index Terms—Charging pile, high power density, low conduction loss, matrix-dual active bridge (M-DAB).

Description:

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