Article
Engineering, Electrical & Electronic
Md Ahsanul Hoque Rafi, Jennifer Bauman
Summary: A novel two-winding semi-DAB converter is proposed in this article to improve the overall efficiency of a DC/DC converter in electric vehicle fast charging applications. The converter structure and control method proposed in this article can effectively enhance the efficiency, especially in scenarios with high input voltage and low output voltage.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Electrical & Electronic
Fanfan Lin, Xin Zhang, Xinze Li
Summary: With the increasing popularity of dc microgrid, the symmetric CLLC resonant dual active bridge converter is commonly used as a dc transformer (DCT) in such applications. However, challenges arise in the design of CLLC-DCT, including deviation in voltage conversion ratio (VCR) due to fluctuating values of inductors or capacitors, system instability when connected to a constant power load, and the need for high efficiency even with parameter fluctuations. A five-stage design methodology has been proposed to address these concerns, using particle swarm optimization for optimization and validation through a 1-kW hardware prototype.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Samanta G. Barbosa, Luiz H. S. C. Barreto, Demercil de S. Oliveira Jr
Summary: This article proposes a novel topology of a single-stage single-phase bidirectional ac-dc converter with high-frequency isolation feasible for onboard chargers. The structure utilizes interleaving concept and an autotransformer to share current stresses and increase current ripple frequency. The theoretical study, operation principle, and loss analysis are performed, and the proposed topology is compared with a traditional two-stage solution, demonstrating its competitiveness.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Hwa-Pyeong Park, Jee-Hoon Jung
Summary: A quasi-resonant flyback converter with a divided resonant capacitor is proposed to suppress voltage spikes and improve power conversion efficiency. The operational principle of the divided resonant capacitor is analyzed and validated through experiments. The proposed design effectively reduces voltage spikes and improves power conversion efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Automation & Control Systems
Abraham Marquez Alcaide, Sandro Guenter, Jose I. Leon, Giampaolo Buticchi, Samir Kouro, Leopoldo Garcia Franquelo
Summary: The global shift towards electrified transportation has increased the demand for electric vehicles. To facilitate this transition, fast and ultrafast charging substations are needed. Power converters are crucial for the widespread adoption of electric vehicles, but their reliability and maintenance scheduling are becoming significant concerns. As a result, optimizing the operation of interleaved dc/dc converters in charging poles is important. This article proposes an alternative modulation technique to improve the harmonic performance of the common dc-link capacitor current, extending the capacitor's lifetime. Experimental results validate the effectiveness of the proposed method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Green & Sustainable Science & Technology
Salah Alatai, Mohamed Salem, Ibrahim Alhamrouni, Dahaman Ishak, Ali Bughneda, Mohamad Kamarol
Summary: A design proposal for a five-level LLC resonant DC-DC converter for battery chargers is presented in this paper. The proposed converter achieves high frequency operation and soft switching through a transform-less LLC resonant tank. It has advantages in terms of weight, size, cost, and implementation simplicity, while ensuring smooth energy conversion and higher power density and efficiency.
Article
Automation & Control Systems
Issac Kim, Jung-Wook Park
Summary: This article proposes a new integrated dc-dc conversion system (IDCS) for electric vehicles (EVs). The IDCS integrates the dc-dc converters of on-board charger (OBC), traction converter (TC), and low-voltage dc-dc converter (LDC), reducing the number of components and cost. It performs the functions of each converter while charging the high-voltage battery and low-voltage battery simultaneously, and regulates the dc-link voltage. Experimental tests on a hardware prototype prove its practical effectiveness.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zahra Gholami, Rahim Ildarabadi, Hamed Heydari-Doostabad, Mohammad Monfared, Terence O'Donnell
Summary: This paper proposes a new wide range bidirectional buck-boost dc-dc converter that improves voltage gain in both forward and backward directions for electric vehicle applications. The converter has a high-voltage gain ratio without theoretical limits in the output voltage, and it achieves a good balance between component count, number of conducting components, semiconductor device ratings, direct input-output connection, and efficiency. The experimental results validate the theoretical analysis and demonstrate high efficiency in both modes of operation.
IET POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Behnam Koushki, Praveen Jain, Alireza Bakhshai
Summary: A new topology and controller for bi-directional EV battery chargers based on single-stage AC-DC resonant converter is proposed. The topology is a Half-Bridge (HB)-Full-Bridge (FB) resonant converter with MOSFET's connected in series and in opposite direction, and an active filter on the DC-side. The use of an appropriate control scheme enables a wide range of power control under different voltage levels, and the absence of electrolytic capacitors increases the reliability of the converter. The controller allows Zero Voltage Switching (ZVS) for all switching instances, reducing conduction losses and improving efficiency, while the active filter absorbs low frequency current ripple to prevent it from affecting the battery and increasing its lifespan.
Article
Engineering, Civil
Dule Wang, Xiaohui Qu, Yunchang Yao, Ping Yang
Summary: This paper systematically presents a method to derive effective hybrid IPT converters starting from existing topologies with configurable CC or CV output. Design principles include fewer mode switches and compensation components, and some available hybrid topologies are given regardless of the constraint of LCT parameters.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Yunting Liu, Fang Z. Peng
Summary: This article presents a DC capacitor-less Solid State Variable Capacitor (SSVC) which removes bulky DC capacitors used in traditional systems, simplifying the structure and improving reliability. By utilizing AC-side voltage to support DC voltage, this innovative approach only requires a small capacitor for filtering, enabling the removal of other capacitors from the DC link busbar.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Hardware & Architecture
Vasiliki Gogolou, Konstantinos Kozalakis, Thomas Noulis, Stylianos Siskos
Summary: A novel design methodology is developed to speed up the design cycle time of DC-DC power converters. This methodology provides high accuracy post-layout RC parasitics aware results by using small signal approximation models instead of complicated large RC netlists. Scattering parameters analysis is used for on the fly performance simulation of the power MOSFET switches' routings. The proposed methodology integrates the RC parasitics aware back end of line (BEOL) S-parameter model into the schematic testbench, minimizing the design's netlist size. This methodology accurately predicts and evaluates the performance degradation of the DC-DC converter, which was previously unable to be simulated, while reducing the simulation time and design iterations needed.
INTEGRATION-THE VLSI JOURNAL
(2023)
Article
Energy & Fuels
Mattia Simonazzi, Alessandro Campanini, Leonardo Sandrolini, Claudio Rossi
Summary: This paper analyzes two different design procedures for a series-parallel compensated WPT battery charger based on different definitions of the operating resonant frequency in the condition of maximum link efficiency. The behavior of the voltage gain magnitude and the input impedance angle of the resulting WPT links is studied for different loads and coupling coefficients. The design algorithms are supported by analytical formulas derived from an exact circuit analysis of the WPT link, avoiding approximations as far as possible. A case study is proposed to support the theoretical approach, in which both design procedures are implemented considering specifications in line with the actual automotive standards. Finally, the efficiency in both cases is characterized.
Review
Engineering, Electrical & Electronic
Md Ahsanul Hoque Rafi, Jennifer Bauman
Summary: This article reviews the current status of electric vehicle (EV) adoption and the development of DCFC networks, emphasizing the importance of adding energy storage to DCFC stations to alleviate grid load and reduce operating costs. It also provides a detailed analysis of the motivation, architecture, and power electronic converters for DCFC stations with energy storage.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Review
Computer Science, Information Systems
Teck Seong Chang, Harikrishnan Ramiah, Yang Jiang, Chee Cheow Lim, Nai Shyan Lai, Pui-In Mak, Rui P. Martins
Summary: The advancement in Power Management Integrated Circuit (PMIC) has enabled the development of System-on-Chip (SoC) solutions for dc-dc conversion using CMOS technology scaling and on-chip passive element integration. Switched-capacitor-inductor hybrid architectures with fully-integrated passives have become popular for compact and efficient converter solutions. This article reviews the latest advancements in hybrid dc-dc topologies for low-power applications, addressing challenges such as charge sharing loss and limited conversion ratio, and compares their power density and efficiency performance metrics.
