배터리 충전 및 방전기용 DAB 컨버터를 위한 제어기 설계 Controller Design of a DAB Converter for Battery Charging and Discharging Applications

 

Research article The Transactions of the Korean Institute of Electrical Engineers KIEE Vol. 74, No. 04, p.594-604 ISSN (print) :1975-8359 ISSN (online) :2287-4364

 Received :26 Dec. 2024Revised :20 Feb. 2025Accepted :28 Feb. 2025 DOI :https://doi.org/10.5370/KIEE.2025.74.4.594 

배터리 충전 및 방전기용 DAB 컨버터를 위한 제어기 설계 Controller Design of a DAB Converter for Battery Charging and Discharging Applications 박성현 (Sunghyeon Park) 1iD 김인동 (In-Dong Kim) †iD (Dept. of Electrical Engineering, Pukyong National University, Republic of Korea.) †Corresponding Author : Dept. of Electrical Engineering, Pukyong National University, Republic of Korea. E-mail : idkim@pknu.ac.kr

Abstract 

Recently, as the demand for DC systems has rapidly increased, research on battery chargers has been conducted extensively. Among DC/DC converters, the DAB converter has the advantage of enabling ZVS(Zero Voltage Switching) operation and securing bidirectional power transmission and insulation by using a transformer in a left-right symmetrical structure. Since bidirectional operation is possible, it is widely used in DC grid systems and battery chargers. This paper proposes a switching method that integrates three switching methods, TPS, EPS, and SPS, for efficient converter operation in a wide load range. In addition, a controller that smoothly operates CC-CV (Constant Current Constant Voltage) mode conversion and has self-protection operation is ? proposed, and the operating characteristics are verified through simulation and experiments using the fabricated DAB converter.

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