Recent Development in DC-DC Converter
A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".
Deadline for manuscript submissions: 20 December 2024 | Viewed by 850
Special Issue Editor
Special Issue Information
Dear Colleagues,
This Special Issue focuses on the latest advancements in DC-DC converter technology, emphasizing the pivotal role these components play in the broader landscape of power electronics. With a specific focus on high efficiency, high power density, digital control, and innovative topologies, this edition seeks to showcase cutting-edge research and developments that push the boundaries of what is possible in energy conversion systems.
This Special Issue invites contributions from researchers, engineers, academics, and industry professionals who are working on the forefront of DC-DC converter technology. It aims to provide a comprehensive overview of the current trends, challenges, and breakthroughs in the field, facilitating a rich exchange of knowledge and ideas that could spearhead further innovation and application in power electronics.
Topics of interest for publication include, but are not limited to, the following:
- Strategies for high-efficiency DC-DC converters;
- Strategies for high power density DC-DC converters;
- New circuit topologies;
- Magnetics design;
- Digital control;
- Electric vehicles and other industrial applications.
Dr. Jungkyu Han
Guest Editor
Manuscript Submission Information
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Keywords
- power electronics
- DC-DC converter
- high efficiency
- high power density
- digital control
- topology
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Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: A New Voltage Doubling Rectifier for High Efficiency LLC Resonant Converter
Authors: Chong-Eun Kim; Jung-Hyun Yeo
Affiliation: Department of Railroad Electrical and Information Engineering, Korea National University of Transportation, Ui-wang 16106, Republic of Korea
Abstract: An LLC resonant converter is a remarkably effective solution in ensuring high-efficiency with high-frequency operation due to zero-voltage switching (ZVS) of the primary switch and zero-current switching (ZCS) of the secondary switch rectifiers. However, when constructing a secondary rectifier of an LLC resonant converter, there is a disadvantage that it is inevitable to use a jumper on a PCB in the process of implementing circuits such as center-tap rectifier (CTR), full-bridge rectifier, and voltage doubler rectifier (VDR). In the case of conventional VDR, since the source voltage of the high-side FET changes according to the switching operation of the primary switch, auxiliary winding for floating voltage source or boot-strap circuit is essential. In this case, there is a significant drawback that the gate driving is complicated for high power density applications. This complexity in the gate drive circuit acts as a limiting factor for the practical application of VDR. To overcome these issues, this paper proposes a new rectification circuit based on the VDR and applies it to the LLC resonant converter.
Title: Control Method for Improving Dynamic Characteristics of DM Coupled Inductor Boost Converter Using a 2D Look-Up Table
Authors: Seong-Wook Jeong; Dong-In Lee; Han-Shin Youn; Gyeong-Hyun Kwon
Affiliation: Department of Electrical Engineering, Incheon National University, Incheon 22012, Korea
Abstract: This paper proposes a control method to improve the dynamic performance of a two-phase DM-coupled boost converter designed for applications such as hybrid vehicles and railway systems. A conventional boost converter can be modified to a two-phase interleaved configuration to reduce current ripple and incorporate a differential mode (DM) coupled inductor to reduce the volume of magnetic components, thereby achieving low cost and volume reduction. However, when this converter is operated using a conventional PI controller, significant issues arise, particularly in the discontinuous conduction mode (DCM), where dynamic characteristics and reponse times are considerably slow. For a conventional boost converter, the steady-state duty cycle during DCM operation can be calculated analytically and used for feedforward compensation in a current-duty controller. In contrast, the duty cycle of a two-phase DM coupled boost converter during DCM operation exhibits non-linear behavior depending on input/output voltages and load conditions, making analytical computation infeasible. To address this, steady-state duty cycle data is extracted through experiments and simulations, and a Look-up table is constructed to perform feedforward compensation. Given the multiple input and output specifications, multiple Look-up tables are required, leading to excessive MCU computation load. The proposed correction algorithm enables feedforward compensation in the DCM region with a single Look-up table for all input and output specifications, improving dynamic characteristics and reducing MCU computational load.
