Article
Engineering, Electrical & Electronic
Dong-Wook Seo
Summary: The study reviewed the impedance characteristics of the critically-coupled two-coil wireless power transfer system, highlighting the limitation of conventional three-coil systems to achieve the same impedance characteristics. By proposing a design method that changes the free resonant frequencies, a higher power transfer efficiency was successfully achieved in a three-coil wireless power transfer system compared to traditional two-coil and three-coil systems.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Marine
Peizhou Liu, Tiande Gao, Ruixuan Zhao, Zhaoyong Mao
Summary: In this study, a coil structure compatible with the structure of autonomous underwater vehicles (AUVs) and preventing rotational misalignment has been proposed for stabilizing the output power of a wireless power transfer (WPT) system. The performance of the proposed coil structure has been experimentally evaluated and found to stably deliver 2 kW power with a dc-dc efficiency of 92.7%.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Jung-Ick Moon, Charles Marfo Awuah, Patrick Danuor, Young-Bae Jung
Summary: In order to ensure high-power transfer efficiency (PTE) in wireless power transfer (WPT) applications, it is crucial to achieve a high coil quality factor (Q). This article demonstrates an effective method to enhance Q by using different thicknesses for each trace of the coil. The inner turns of the coil have a relatively smaller thickness to reduce ohmic resistance and increase the coil's Q. Furthermore, experimental results show that the proposed coil structure achieves an 11.54% increase in Q compared to conventional coils with the same turn thicknesses.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Gautam Rituraj, Praveen Kumar
Summary: This paper proposes a novel and simple ferrite arrangement of unipolar rectangular coils to improve the efficiency of ferrite usage by calculating the position and length, minimizing system volume, and maintaining a high coupling coefficient k value.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Multidisciplinary Sciences
Yang Leng, Derong Luo, Zhongqi Li, Fei Yu
Summary: In this paper, a solution is proposed for the problem caused by registration deviation between the transmitting and receiving coils in wireless power transfer systems. By optimizing the mutual inductance to meet design requirements, the calculation formula for coupling coefficient is verified.
Article
Engineering, Electrical & Electronic
Yuyu Geng, Qiang Guo, Zhongping Yang, Fei Lin, Yi Wang
Summary: This paper investigates the influence of coil arrangement modes on the coupling effect in dynamic wireless power transfer (DWPT) systems and proposes an improved real-time strong coupling coil arrangement mode. By theoretical analysis and genetic algorithm optimization design, stable mutual inductance effect is achieved and validated through an application case on an electric bus.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Junming Zeng, Shuxin Chen, Yun Yang, Shu Yuen Ron Hui
Summary: This article presents a systematic frequency-sweeping based method for fast and accurate determination of mutual coupling coefficient in a series-series wireless power transfer system. The proposed method is found to be most sensitive when the frequency is swept from the lower frequency boundary in a weakly-coupled system. Through sensitivity analysis and evaluation of adaptive frequency step functions, the method achieves high accuracy detection in minimum time.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Analytical
Young-Jin Park, Ji-Eun Kim, Su-Hyeong Lee, Kyung-Hwan Cho
Summary: This paper presents a formula for designing a printed spiral coil with the maximum quality factor. The formula includes the metal thickness, single pattern width, total pattern width, and turn number, and is effective in the megahertz frequency range. Using a volume filament model, the resistance, self-inductance, and Q-factor are calculated based on the ratio of pattern width, total pattern width, and turn number, and considering different metal thicknesses, frequencies, and total pattern widths. The results showed that the optimized coils have higher coupling efficiency compared to coils without optimal dimensions.
Article
Chemistry, Analytical
Xiaotian Wang, Changli Yu, Yuteng Wu, Jingang Wang
Summary: This paper innovatively designs a new type of quadrilateral overlapping wireless power transfer coupling coil to solve the problem of reducing energy transmission efficiency caused by the offset of the coupling coil. The experimental results verify that the proposed coil structure has an excellent anti-offset capability.
Article
Automation & Control Systems
Jiacheng Li, Xueliang Huang, Linlin Tan, Ruoyin Wang
Summary: Wireless power transfer technology has gained popularity due to its convenience, safety, and unmanned nature. However, the use of non-ferromagnetic substrates in couplers often increases coil equivalent resistance and decreases system efficiency. This study evaluates the effect of substrates on coil equivalent resistance and proposes a method to reduce it. A high-power-density coupler is designed based on this method, achieving efficient power transmission.
Article
Nanoscience & Nanotechnology
Xuegui Zhu, Dongyang Qi, Gang Yan, Changjun Pu
Summary: This paper focuses on the problem of non-uniform magnetic field distribution in short-distance magnetic coupled wireless power transfer (MC-WPT) systems. The authors propose a new method to design the transmitter coil that combines genetic algorithm (GA) with a partial element equivalent circuit (PEEC). The experiments show that the proposed method improves the effective power transfer area and maintains high system efficiency, providing a wider working space and steady wireless energy supply for mobile objects.
Article
Computer Science, Information Systems
Jure Domajnko, Natasa Prosen
Summary: This paper presents the evolution of an inductive wireless power transfer using a multicoil system. The proposed structure, called the double DDQ coil structure, consists of double DD coils on the transmitter and receiver side upgraded with an additional nonpolar quadrature coil. The main advantage of this structure is increased power density and increased misalignment tolerance.
Article
Engineering, Electrical & Electronic
Xin Wang, Junqi Pang, Qiulin Tan, Helei Dong, Nan Zhao, Tao Xue
Summary: A novel double-layer parallel coil model is proposed in this study to enhance the quality factor of the coils, improve the transmission efficiency, and increase the output power of the system for efficient wireless power transfer. Experimental validations and simulation analysis show that the double-layer parallel coil outperforms the conventional single-layer coil under specific conditions.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Multidisciplinary
Yong Tian, Yawen Lin, Jindong Tian, Lijuan Xiang
Summary: A metal object detection (MOD) approach based on multi-thread sensing coils is proposed in this paper, optimizing coil turns and distance between threads to improve voltage uniformity at different detection positions. Simulation and experimental results demonstrate a 68% improvement in voltage uniformity compared to conventional even sensing coils.
Article
Engineering, Multidisciplinary
Emin Yildiriz, Salih Burak Kemer, Murat Bayraktar
Summary: An optimal inductive power transfer (IPT) system that meets the wireless charging requirements of an e-tricycle scooter has been designed. The system achieves high power transfer efficiency by accurately calculating the coil parameters. By using the optimal IPT system and minimizing the use of copper, efficient DC to DC efficiency is achieved.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2022)
Article
Engineering, Biomedical
Byunghun Lee, Yaoyao Jia, S. Abdollah Mirbozorgi, Mark Connolly, Xingyuan Tong, Zhaoping Zeng, Babak Mahmoudi, Maysam Ghovanloo
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Jaemyung Lim, Byunghun Lee, Maysam Ghovanloo
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2020)
Article
Computer Science, Information Systems
Hyeokjin Kwon, Kang-Ho Lee, Byunghun Lee
Article
Engineering, Electrical & Electronic
Haejoon Jung, Byunghun Lee
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2020)
Correction
Engineering, Biomedical
Yaoyao Jia, Byunghun Lee, Fanpeng Kong, Zhaoping Zeng, Mark Connolly, Babak Mahmoudi, Maysam Ghovanloo
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2020)
Article
Automation & Control Systems
Jieun Park, Byunghun Lee, Sung-Wan Hong
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2020)
Review
Computer Science, Information Systems
Byunghun Lee, Yaoyao Jia
Article
Automation & Control Systems
Najam ul Hassan, Sung-Wan Hong, Byunghun Lee
Summary: A robust multioutput self-regulated rectifier without any switching circuitry is proposed for wirelessly powered biomedical devices, providing dual high voltages for neuro stimulator and a low voltage for operating systems. It utilizes series and parallel resonant configuration with only one resonant capacitor.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Byunghun Lee, Dukju Ahn
Summary: This paper introduces a small, low-cost self-regulated rectifier for parallel-resonant receivers in the wireless power transmission system. The proposed regulation reduces total resistance seen by the receiver coil to decrease power delivered to the receiver coil itself, leading to an increase in overall efficiency.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Ki-Duk Kim, Seunghyun Park, Byunghun Lee, Hyung-Min Lee, Gyu-Hyeong Cho
Summary: This paper presents a low-cost 80x60 microbolometer CMOS thermal imager integrated with a proposed 12-bit biasing digital-to-analog converter (DAC), which has a fast start-up time and comparable noise-equivalent temperature difference.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Biomedical
Jaeho Lee, Beomjun Bae, Beomjin Kim, Byunghun Lee
Summary: A full-duplex wireless power transfer system via textile is presented for miniaturized implantable medical devices. The system eliminates the need for bulky batteries or energy harvesters, reducing the size of the devices. By using textile as the medium of power transmission, the system overcomes the limitations of the NFC method and extends the effective range. Additionally, simultaneous bidirectional data transmission is achieved, further miniaturizing the devices and improving system performance.
BIOMEDICAL ENGINEERING LETTERS
(2022)
Article
Automation & Control Systems
Haejoon Jung, Byunghun Lee
Summary: This article presents a wireless power and bidirectional wireless data transfer system using a conventional 2-coil inductive link. The system is suitable for Internet-of-Things (IoT) and mobile applications, and achieves high data rates through dual-band frequency shift-keying and load shift-keying techniques.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Analytical
Zuolin Li, Junhyuck Lee, Jaemyung Lim, Byunghun Lee
Summary: When the need arises to detect various physiological signals of the human body, clothing embroidered with near-field effect patterns can be utilized as a long-term power supply medium to provide power to long-distance transmitters and receivers, creating a wireless power supply system. The proposed system utilizes an optimized parallel circuit to achieve a power transfer efficiency over five times higher than that of the existing series circuit. The power transfer efficiency is increased significantly, even reaching 25.1% when powering eight sensors simultaneously, and can still reach 13.21% even when reducing the sensors to just one. Furthermore, the system is also applicable for a range of 2 to 12 sensors.
Article
Engineering, Chemical
Muhammad Zada, Abdul Basir, Byunghun Lee, Hyoungsuk Yoo
Summary: This paper presents protocols for improving capacitance measurements in a parallel-plate capacitor heating applicator system operating at a frequency of 27.12 MHz. The authors used alpha and beta corrections to optimize the system and ensure accurate measurements. The study also revealed the significance of RF heating in different food products and has implications for various fields such as food processing, medical devices, water treatment, and environmental monitoring.
JOURNAL OF FOOD ENGINEERING
(2024)
