High-Efficiency Bidirectional LLC Resonant Converter with Primary Auxiliary Windings

Eun-Soo Kim and Jae-Sung Oh
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Eun-Soo Kim: Department of Electrical and Electronics Engineering, JeonJu University, JeonJu 55069, Korea
Jae-Sung Oh: Department of Electrical and Electronics Engineering, JeonJu University, JeonJu 55069, Korea

Energies, 2019, vol. 12, issue 24, 1-14

Abstract: In this paper, high-efficiency bidirectional LLC resonant converters with primary auxiliary windings in transformers of resonant circuits are proposed. Even though resonant capacitors are used on the primary and secondary sides, the proposed converter can operate, regardless of the direction of the power flow, with the high gain characteristics of the LLC resonant converter without the mutual coupling of resonant capacitors. The operation principles and gain characteristics of the proposed bidirectional DC–DC converters are described in detail. A 3.3 kW prototyped bidirectional LLC resonant converter for interfacing 750 V DC buses was built and tested to verify the effectiveness and applicability of this proposed converter.

Keywords: bidirectional converter; LLC resonant converter; CLLC resonant converter; DC–DC converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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