제안 방법

• Recently, several kinds of hybrid converter topologies for the on-board charger have been introduced to overcome above mentioned drawbacks. In this paper, a new hybrid topology which combines a soft switching full bridge (SSFB) converter and a half-bridge LLC (HBLLC) converter. In the SSFB topology, an additional switch and a diode are employed in the secondary side for freewheeling thereby possessing following advantages: high DC conversion ratio with negligible duty loss, ZVZCS of the primary switches and wide ZVS range, high efficiency with no circulating current, especially at the light load, small size of the passive components in the secondary and a simple switching scheme.
• In this research a novel soft-switching hybrid converter combining an SSFB converter and a HBLLC resonant converter is proposed for the EV On-board charger. Experimental results with a 10 kW prototype have been presented to verify the validity of the proposed converter.