Publication: Implementation of Three-Phase Bidirectional Isolated DC-DC Converter with Improved Light-Load Efficiency
Date
2021
Authors
Sharifuddin N.S.M.
Tan N.M.L.
Toh C.L.
Ramli A.Q.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
Phase-Shift Modulation (PSM) strategy had been widely used in Three-Phase Bidirectional Isolated DC-DC Converter (3P-BIDC). Nevertheless, this conventional high frequency PSM method is more suitable for medium and rated load application. In light-load conditions (0-0.3 p.u.), the power efficiency may drop to less than 65%. Thus, this paper proposes an enhanced switching strategy by introducing a low frequency burst-mode signal to control the number of active PSM cycle over one burst cycle. A 150-V, 1.5-kW, 3P-BIDC prototype is developed for laboratory testing. This prototype is first evaluated with the conventional PSM strategy for wide range of loads. Then the proposed method is applied for light-load condition evaluation. The experimental results prove that an average of 90% power efficiency could be achieved under light load condition. � 2021 IEEE.
Description
Efficiency; Modulation; Bidirectional isolated dc-dc converter; Burst-mode; Dual active bridges; Efficiency improvement; Intermittent switching; Light-load efficiency; Light-load efficiency improvement; Phase shift modulation; Three phase; Three phasis; Three-phase bidirectional isolated dc-dc converter; Three-phase dual-active bridge; DC-DC converters