Bidirectional DC-DC converter using secondary LLC resonant tank

Kim, Eun-Soo; Park, Jun-Hyoung; Joo, Jong-Sung; Lee, Seungmin; Kim, Kwangseob; Kong, Young-Su

doi:10.1109/apec.2015.7104639

Cited by 15 publications

(5 citation statements)

References 4 publications

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“…Additionally, the presence of the added inductor adds complexity to the converter and its equations. Another bidirectional LLC resonant converter is proposed in [151], which utilizes two switching networks on the primary side and a three-leg interleaved switching network on the secondary side. While this converter offers high power density, it also suffers from a high number of switches, gatedrives, and resonant components, which can negatively affect cost, conduction losses, and overall efficiency.…”

Section: ) Bidirectional Two-level Llc Convertersmentioning

confidence: 99%

Application-Oriented Review of the LLC-Based Resonant Converters

Shahsevani,

Beiranvand

2024

IEEE Access

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The LLC resonant converter is a widely utilized power electronics converter, due to its numerous industrial and domestic applications. This converter offers some advantages such as soft-switching operation of all switches, high efficiency, high power density, low voltage stress, minimal electromagnetic interference (EMI) noise, input/output isolation, wide input/output voltage range, and reliable and good performance under the wide load variation ranges, as well as good light-load operation. However, this converter has certain limitations, which can be addressed to enhance its operation and efficiency. This paper provides an in-depth review and comparison of various LLC-based resonant converter configurations, focusing on their operational principles, mathematical analysis, control methods, and some practical applications including electric vehicle chargers, TV power supplies, LED drivers, photovoltaic cells, HVDC production, fuel cells, and wireless power transfer applications. By examining the strengths and weaknesses of the different LLC resonant converter designs, this study aims to contribute to the ongoing research efforts in improving the performance and efficiency of this important power electronics converter. INDEX TERMS DC-DC power conversion, LLC resonant converter, resonant power conversion.

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Section: ) Bidirectional Two-level Llc Convertersmentioning

confidence: 99%

Application-Oriented Review of the LLC-Based Resonant Converters

Shahsevani,

Beiranvand

2024

IEEE Access

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“…In [27] is proposed to use GaN transistors to increase efficiency of the DAB converter. Dual active bridge topology is investigated in many scientific papers [28], [29], [30] and LLC resonant converter [31], [32], [33] also. The main drawbacks of these topologies are that the number of the components are high and control and optimization is complex.…”

Section: Isolated Multi Stage Bidirectional Ac-dc Converter Topologiesmentioning

confidence: 99%

An Overview of Bidirectional AC-DC Grid Connected Converter Topologies for Low Voltage Battery Integration

Kroics

Husev

Tytelmaier

et al. 2018

IJPEDS

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<p>Battery energy storage systems are becoming more and more popular solution in the household applications, especially, in combination with renewable energy sources. The bidirectional AC-DC power electronic converter have great impact to the overall efficiency, size, mass and reliability of the storage system. This paper reviews the literature that deals with high efficiency converter technologies for connecting low voltage battery energy storage to an AC distribution grid. Due to low voltage of the battery isolated bidirectional AC-DC converter or a dedicated topology of the non isolated converter is required. Review on single stage, two stage power converters and integrated solutions are done in the paper.</p>

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“…By paralleling the auxiliary inductor on the input side of the resonant tank, a resonant tank with bidirectional symmetry can be constructed, and that can also enable bidirectional energy transmission, but the volume and loss of the auxiliary inductor are large [17][18][19]. In [20], a bidirectional dc/dc converter using SLLC resonant tank was proposed; it uses two auxiliary inductors connected in parallel on the secondary side to achieve bidirectional wide-range voltage regulation.…”

Section: Introductionmentioning

confidence: 99%

Backward Step-Up Control Strategy for Bidirectional LLC Resonant Converter

Niu

Wang

et al. 2022

Energies

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An LLC resonant converter has the advantages of simple structure and soft switching. It can enable bidirectional power transmission, but it is difficult to realize a normalized gain greater than one under backward mode (backward step-up mode). Cascaded dc/dc converters or topological changes can solve this problem, but additional switches and components are required and losses are added. Without changing the LLC resonant converter’s basic topology, this paper proposes a variable duty-cycle control strategy of primary side switches for backward step-up mode. Using variable duty-cycle control, the LC resonant tank can be charged, and then the backward step-up mode can be realized. Soft switching characteristics of some primary side switches and all secondary side switches are guaranteed. In this study, the working principle of an LLC resonant converter under bidirectional control strategy was analyzed, and the backward step-up control was analyzed in detail. The voltage gain and the boundary of continuous conduction mode (CCM) and discontinuous conduction mode (DCM) were derived. A synchronous rectification method related to the backward step-up control is proposed. The control strategy was verified by experiments.

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Bidirectional DC-DC converter using secondary LLC resonant tank

Cited by 15 publications

References 4 publications

Application-Oriented Review of the LLC-Based Resonant Converters

Application-Oriented Review of the LLC-Based Resonant Converters

An Overview of Bidirectional AC-DC Grid Connected Converter Topologies for Low Voltage Battery Integration

Backward Step-Up Control Strategy for Bidirectional LLC Resonant Converter

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