Article
Energy & Fuels
Fabio Corti, Alberto Reatti, Ya-Hui Wu, Dariusz Czarkowski, Salvatore Musumeci
Summary: This paper presents a design methodology of a Class-E inverter for capacitive wireless power transfer applications, focusing on capacitive coupling influence. The design ensures high power transmission at high efficiency by utilizing the Class-E inverter and optimizing the design procedure. The theoretical derivations are validated through simulations and experimental tests, confirming the accuracy of the proposed method.
Article
Computer Science, Information Systems
Yashwanth Bezawada, Yucheng Zhang
Summary: The paper investigates optimal impedance tracking for capacitive wireless power transfer system to achieve maximum power transfer, proposing a new approach of finding impedance characteristics of the CPT system at certain frequencies. Simulations and hardware tests were conducted using a single active switch Class-E-2 resonant converter to study efficiency with different resonant inductors, frequency ranges, and duty cycles. Discussions on zero-voltage-switching (ZVS) limits with regards to frequency and duty cycle were also included.
Article
Engineering, Electrical & Electronic
Xinyuan Ge, Lin Cheng, Yuan Yao, Wing-Hung Ki
Summary: This study presents a 6.78 MHz single-stage transmitter using a reconfigurable regulating class-D power amplifier for wireless power transfer applications. The transmitter achieves power regulation and transmission with only one power stage, adopts a DCM-ZVS scheme to reduce switching loss, and utilizes a dual-loop control with PI compensation for tight regulation and fast response. The system demonstrates correct output voltage regulation under load changes, delivers maximum power to the receiver over a distance, and achieves a peak efficiency of 57.3%.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Computer Science, Information Systems
Chanh-Tin Truong, Sung-Jin Choi
Summary: This paper introduces a new architecture that makes CPT systems simpler and provides a wide input voltage range through duty control, eliminating the need for an additional DC-DC converter. The system offers an extended ZVS range to handle input and load variations, achieving an efficiency as high as 88.2%.
Article
Engineering, Electrical & Electronic
Yining Liu, Prasad Jayathurathnage, Jorma Kyyra
Summary: This article widens the design options of push-pull class Phi(2) converters through frequency-harmonic analysis, providing ample space for optimization based on any required performance indices. Six numerical equations are found to fully decouple the interconnected relations between each circuit parameter and the duty cycle D. The proposed design method is validated through an example wireless power transfer system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Junwei Zhang, Jinbin Zhao, Ling Mao, Jinguo Zhao, Zhao Jiang, Keqing Qu
Summary: This article explores the application of the Class-E inverter in wireless power transfer systems and proposes a secondary side static zero compensation switching method. By analyzing the load characteristics and system output power efficiency, it is found that a significant increase in output power and efficiency can be achieved when the coupling strength is high. The correctness and feasibility of the theory and method are verified through experiments.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Tomohiro Sensui, Hirotaka Koizumi
Summary: This article introduces a new load independent zero-voltage-switching (ZVS) parallel resonant Class E inverter and presents a design approach that can maintain a constant output current at any duty ratio, without the need for additional elements or feedback control.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Liangzong He, Dong Guo
Summary: A voltage-clamped class-E converter is proposed for magnetic coupling resonance based wireless power transfer system to address issues of high voltage stress and sensitive ZVS condition. Through harmonic analysis and design strategy, ZVS can be maintained over a wide range of coils distance, while improving system efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Xin Zhang, Zhiqi Chu, Yuehua Geng, Xuetong Pan, Rongmei Han, Ming Xue
Summary: This paper proposes a high-accuracy frequency-tracking method based on FPGA to solve the problem of unavoidable phase-tracking error in the wireless power transfer (WPT) system caused by dead time, MOSFET drive and other factors. Compared with fixed-phase systems, the proposed method accurately controls the phase difference between voltage and current. It detects the phase difference in real time and adjusts the phase compensation angle dynamically to ensure that the system always operates under the optimal zero-voltage switching (ZVS) state, which reduces system loss.
APPLIED SCIENCES-BASEL
(2023)
Article
Automation & Control Systems
Lujie Zhang, Khai Ngo
Summary: This research presents a Class-E inverter design that achieves constant output current and ZVS over a load range by combining with a trans-susceptance network. The tradeoffs between the output current value, effective load range, and input current ripple are discussed. The effectiveness of the design is validated in experiments.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Gangwei Zhu, Jianning Dong, Wenli Shi, Thiago Batista Soeiro, Junzhong Xu, Pavol Bauer
Summary: This article proposes a mode-switching-based phase shift control (MS-PSC) method for wireless power transfer (WPT) systems. The method enables power regulation, load matching, and wide zero voltage switching (ZVS) operations without additional dc-dc converters. By analyzing the mode transitions and implementing the MS-PSC method, the system efficiency is improved over a wider power range compared to conventional controls. Experimental results validate the effectiveness of the proposed method, achieving high overall efficiency and further optimizing efficiency in a certain power range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Min Wu, Xu Yang, Wenjie Chen, Laili Wang, Yongbin Jiang, Chenxu Zhao, Zhengchao Yan
Summary: A dual-sided control strategy based on mode switching is proposed to approach an optimal load impedance and achieve the required output in this article. The control strategy adjusts the output voltage of the inverter by switching the operation mode of the inverter in a wide range to approach the optimal load impedance. Additionally, a novel phase-locked method is proposed for the semi-bridgeless active rectifier control, which is simpler compared with traditional methods.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Liangzong He, Xiayi Huang, Bing Cheng
Summary: Thanks to the superiority of zero-voltage switching (ZVS), the Class E-2 topology has become a promising candidate in wireless power transfer (WPT) at medium and small power levels. The parity-time (PT) theory is initially developed into the Class E-2 WPT system to ensure robust and efficient power transfer under varying transfer distances. A general design procedure is proposed for the PT-symmetry-based Class E-2 WPT system, and the power losses and efficiencies of the components are analytically derived. Experimental results demonstrate the feasibility of the proposed system, achieving robust and efficient power transfer.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Yashwanth Bezawada, Shirshak K. Dhali
Summary: A novel capacitive wireless power transfer system using 8-plate multi-resonant coupling was proposed to minimize the effects of misalignment and improve efficiency. Hardware results showed that this system achieved 88.5% efficiency in a 20.8W test, which was 18.3% higher than a regular 4-plate coupling, and reduced the output voltage drop by 15% for a 10% misalignment.
Article
Engineering, Electrical & Electronic
Junjie Feng, Qiang Li, Fred C. Lee, Minfan Fu
Summary: The study focuses on omnidirectional wireless power transfer (WPT) systems and the use of LCCL-LC resonant converter topology. The research proposes a design methodology for achieving ZVS operation, and experimental results validate the success of ZVS operation in achieving a peak system efficiency of 82% at 5-W output power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Alireza Nasiri, Sing Kiong Nguang, Akshya Swain, Dhafer Almakhles
INTERNATIONAL JOURNAL OF CONTROL
(2019)
Article
Automation & Control Systems
Mouquan Shen, Sing Kiong Nguang, Choon Ki Ahn, Qing-Guo Wang
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2019)
Article
Automation & Control Systems
Mouquan Shen, Sing Kiong Nguang, Choon Ki Ahn
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2019)
Article
Automation & Control Systems
Wei Sun, Zhitao Zeng, Chengchuan Luo, Sing-Kiong Nguang
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2018)
Article
Automation & Control Systems
Jiwei Wen, Sing Kiong Nguang, Xudong Zhao
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2018)
Article
Automation & Control Systems
Han Gao, Yueyong Lv, Sing Kiong Nguang, Guangfu Ma
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
(2018)
Article
Computer Science, Artificial Intelligence
Lei Song, Sing Kiong Nguang, Dan Huang
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2019)
Article
Automation & Control Systems
Shen Yan, Mouquan Shen, Guangming Zhang, Sing Kiong Nguang
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2019)
Article
Automation & Control Systems
Xinxin Liu, Xiaojie Su, Peng Shi, Sing Kiong Nguang, Chao Shen
Editorial Material
Mathematics, Interdisciplinary Applications
Zhiwei Gao, Sing Kiong Nguang, De-Xing Kong
Article
Biochemical Research Methods
Ticao Jiao, Guangdeng Zong, Sing Kiong Nguang, Cunshan Zhang
IEEE TRANSACTIONS ON NANOBIOSCIENCE
(2019)
Article
Mathematics, Interdisciplinary Applications
Jiwei Wen, Sing Kiong Nguang
Article
Computer Science, Information Systems
Shaoge Zang, Kai Lu, Sing Kiong Nguang, Wei Sun
Article
Engineering, Multidisciplinary
Yusmarnita Yusop, Shakir Saat, Zamre Ghani, Huzaimah Husin, M. K. Adie, Sing Kiong Nguang
JOURNAL OF ENGINEERING-JOE
(2019)
Proceedings Paper
Energy & Fuels
Farhan Khan, Sing Kiong Nguang
SMART GRID AND INNOVATIVE FRONTIERS IN TELECOMMUNICATIONS, SMARTGIFT 2018
(2018)