Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Power Decoupled Multi-Port Dual-Active-Bridge Converter Employing Multiple Transformers for DC Distribution Applications
Authors Inhyeok Kim ; Ju-Young Sim ; Jun-Young Lee ; Jee-Hoon Jung
DOI 10.6113/TKPE.2020.25.4.286
Page pp.286-292
ISSN 1229-2214
Keywords DC distribution; Decoupling power control; DAB(Dual-Active-Bridge) converter; Multi-port converter; Multiple transformers
Abstract This study proposes a power decoupled multi-port dual-active-bridge (DAB) DC-DC converter employing multiple transformers. Conventional multiport DAB DC-DC converters experience a power coupling issue from the use of a single transformer, which essentially requires complex power decoupling control. To solve this issue, a multiport DAB DC-DC converter employing multiple transformers is proposed to decouple output power without additional complex control algorithms. The proposed converter uses multiple transformers that can expand output ports easily. Therefore, transformers and the proposed multi-port DAB converter can be designed simply. In addition, the number of coupling inductors can be reduced in the proposed three-port DAB converter compared with that in conventional multiport DAB converters. The power decoupling characteristics and equivalent circuit of the proposed converter are analyzed using theoretical model approaches. Finally, a 3-kW laboratory prototype is developed to verify the effectiveness of the proposed converter.