Design Considerations of Series-Connected Devices Based LLC Converter

Dongkwan Yoon, Sungmin Lee and Younghoon Cho
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Dongkwan Yoon: Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
Sungmin Lee: Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
Younghoon Cho: Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea

Energies, 2020, vol. 13, issue 1, 1-14

Abstract: This paper describes the design of a Series-Connected Device based on a fixed–frequency LLC resonant converter (SCDLLC). Isolation of the dc-dc converter like the LLC resonant converter is used for the stability of the high voltage system such as a solid-state-transformer (SST). The series-connected devices driving method is one of the methods applicable to a high voltage system. When driving series-connected devices, an auxiliary circuit for voltage balancing between series-connected devices is required, which can be simply implemented using a passive element. In this paper, LLC converter design with balancing circuits configured in parallel with a device is provided, and both the simulations and experiments were performed.

Keywords: solid-state-transformer (SST); isolation dc-dc converter; LLC resonant converter; series-connected devices (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: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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