In recent years, the power handling capability of EV chargers has proliferated for reducing the charging time. In order to enhance the design and efficiency of EV chargers, an in-depth investigation of the losses caused in plug-in EV chargers is needed. This article presents an accurate loss model of a novel single-stage single-phase isolated PFC converter for a bidirectional EV charging application. The EV charger includes a current-fed full-bridge converter on the grid side with swinging boost inductor that is affiliated with a full-bridge converter at the dc-side coupled via a high-frequency transformer. A modified control strategy and novel modulation method are adopted for achieving soft-switching operation and bidirectional power flow. To ensure that the proposed EV charger is feasible, experimental results with loss analysis of a 1.5 kW unit are presented showing that the operation, analysis, and design are perfectly accorded.
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