Fuel Cell power system with LLC resonant DC/DC converter

Boscaino, V.; Miceli, R.; Buccella, Concettina; Cecati, Carlo; Latafat, Hamed; Razi, Kaveh

doi:10.1109/ievc.2014.7056220

Cited by 4 publications

(2 citation statements)

References 22 publications

(14 reference statements)

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“…LLC resonant converters have seen a rapid increase in applications across various industries, such as electric vehicle chargers, power converters for fuel cells, server modules, and photovoltaic (PV) systems caused by their advantages of achieving high efficiency through zerovoltage switching (ZVS) and zero-current switching (ZCS), as well as excellent output voltage control characteristics under light-load conditions [1]- [3]. High-frequency transformers often employ a magnetizing inductance with air gaps added within the transformer core for preventing core saturation to achieve resonance at a lower cost or higher density [4].…”

Section: Introductionmentioning

confidence: 99%

Transformer Design Technique Based on the Magnetic Equivalent Model of High-Frequency Isolated LLC Converter With High Accuracy and Reduced Design Time

Park,

Yang,

Jang

et al. 2024

IEEE Access

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High-frequency isolated LLC converters, which require both high efficiency and high density, are gaining important as pivotal technological challenges. In these converters, the transformer plays an essential role not only in providing galvanic isolation between the input and output and in facilitating voltage step-up and step-down but also as a key component in resonance. An appropriate design of the transformer size and structure is required to achieve both high efficiency and high density. This study introduces a selfequivalent magnetic model that incorporates the fringing effect, presenting a design methodology that utilizes this model. Compared with traditional transformer design methods, the proposed methodology allows for a more precise design by considering both the relative permeability and the magnetic path length (MPL), which represents the average path of the magnetic flux. In addition, we employ pareto optimal design techniques to extract a pareto set of transformer designs that satisfy specific conditions and, apply weighting factors to propose an optimal design. The feasibility of the proposed optimal transformer design methodology was verified through finite element analysis simulations and empirical tests using LLC converters.INDEX TERMS high efficiency, high power density, high frequency, high frequency transformer, LLC converter, pareto optimal design method, reluctance modeling, shell-type transformer, Wire winding.

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Section: Introductionmentioning

confidence: 99%

Transformer Design Technique Based on the Magnetic Equivalent Model of High-Frequency Isolated LLC Converter With High Accuracy and Reduced Design Time

Park,

Yang,

Jang

et al. 2024

IEEE Access

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“…Isolated resonant LLC converters are valid alternatives, especially in such applications with high-voltage levels where galvanic insulation between FC and battery is required [13,14]. Resonant DC/DC converters provide higher voltage gain and allow one to increase the conversion efficiency by using soft-switching techniques [15].…”

Section: Introductionmentioning

confidence: 99%

Design of an Integrated, Six-Phase, Interleaved, Synchronous DC/DC Boost Converter on a Fuel-Cell-Powered Sport Catamaran

Rimondi

Mandrioli

Cirimele

et al. 2022

Designs

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This paper describes the preliminary analysis, design and implementation phases of a DC/DC boost converter dedicated to the Futura catamaran propulsion chain developed by the UniBoAT team at the University of Bologna. The main goal of the project was the reduction of the converter’s weight by eliminating the use of heat sinks and by reducing the component size, especially inductors and capacitors. The obtained converter is directly integrated into the structure containing the fuel-cell stack. The realized converter was based on an interleaved architecture with six phases controlled through the average current mode control. The design was validated through simulations carried out using the LT-Spice software, whereas experimental validations were performed by means of both bench tests and on-field tests. Detailed thermal and efficiency analyses were provided with the bench tests under the two synchronous and non-synchronous operating modes and with the adoption of the phase-shedding technique. Prototype implementation and performance in real operating conditions are discussed in relation to on-field tests. The designed converter can be used in other applications requiring a voltage-controlled boost converter.

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High-Frequency Planar Transformer Based on Interleaved Serpentine Winding Method With Low Parasitic Capacitance for High-Current Input LLC Resonant Converter

Park,

Jeon,

Min

et al. 2023

IEEE Access

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Fuel Cell power system with LLC resonant DC/DC converter

Cited by 4 publications

References 22 publications

Transformer Design Technique Based on the Magnetic Equivalent Model of High-Frequency Isolated LLC Converter With High Accuracy and Reduced Design Time

Transformer Design Technique Based on the Magnetic Equivalent Model of High-Frequency Isolated LLC Converter With High Accuracy and Reduced Design Time

Design of an Integrated, Six-Phase, Interleaved, Synchronous DC/DC Boost Converter on a Fuel-Cell-Powered Sport Catamaran

High-Frequency Planar Transformer Based on Interleaved Serpentine Winding Method With Low Parasitic Capacitance for High-Current Input LLC Resonant Converter

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