Article
Engineering, Electrical & Electronic
Zhen Zhang, Hongliang Pang, Stephan H. K. Eder, Ralph Kennel
Summary: This article proposes an autonomous current compensation scheme, the self-balancing virtual impedance, to enhance the transmission performance of multiple-pickup wireless power transfer system. Experimental results demonstrate that the method effectively increases the primary exciting current and transmission power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Xingyu Li, Zhen Zhang, Wenjie Si, Rui Wang, Zhenyan Liang
Summary: This article presents an analysis and optimization method for equivalent impedances specifically for multichannel wireless power transfer systems. The proposed method determines the proper range of load resistances in each channel to achieve ideal transmission performance and avoid cross interference. Proper load resistances values can maintain system efficiency while achieving certain power output. Both simulation and experimental results demonstrate the feasibility and performance of the proposed scheme.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Engineering, Electrical & Electronic
Yixiang Yao, Abubakar Uba Ibrahim, Wenxing Zhong
Summary: The article proposes a design methodology for three-resonator WPT systems to achieve a constant output power in a wide coupling range. It reviews the basic characteristics of the three-resonator WPT system and presents the proposed design methodology in detail.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Esraa Mousa Ali, Mohammad Alibakhshikenari, Bal S. Virdee, Mohammad Soruri, Ernesto Limiti
Summary: An automated impedance matching circuit is proposed in this paper for optimal wireless power transfer, utilizing 2D open-circuited spiral antenna with magnetic resonance coupling in the low-frequency ISM band. The proposed technology can be widely applied in commercial applications, with the results confirming high power transfer efficiency between the transmit and receive resonant circuits when there is a high degree of coupling between the resonators.
Article
Engineering, Electrical & Electronic
Yaoxia Shao, Huan Zhang, Ming Liu, Chengbin Ma
Summary: This article develops an explicit design of an impedance matching network (IMN) to enhance the robustness of MHz wireless power transfer (WPT) systems. Analytical derivations are conducted to accurately match the starting point and direction of the target impedance ray. Different target impedance rays are used to achieve load-independent output voltage and high tolerance to coil misalignment. Experimental results show that the explicitly designed IMN significantly improves system efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xin Liu, Fei Gao, Yiming Zhang, Muhammad Mansoor Khan, Yun Zhang, Tianfeng Wang, Daniel J. Rogers
Summary: This paper proposes a multi-inverter system based on resonant inductor integrated transformers to improve the power rating of WPT without compromising performance. The feasibility and performance of the proposed system are demonstrated through analysis and experiments, achieving high efficiency and power transfer capacity for wide-range power regulation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Amjad Iqbal, Muath Al-Hasan, Ismail Ben Mabrouk, Tayeb A. Denidni
Summary: In this article, a complete and efficient wireless power transfer (WPT) system is designed and validated for deep-body ingestible biomedical capsules. The system consists of a full-duplex antenna, a half-wave rectifier, and a WPT transmitter (Tx), and it offers features such as seamless telemetry, compact size, high efficiency, and high-power transfer efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Hongkyun Kim, Yechan Park, Chul Kim
Summary: This article presents a wireless power transfer system that provides extended controllability of transmitting power for a wide range of link distances and load variations. The system uses a single-stage rectification and regulation process to deliver a stable 3-V dc voltage from a 13.56-MHz sinusoidal waveform. The transmitting power is controlled by the reflected impedance from the receiver to the transmitter, enabling high power transfer efficiency under different link distances and load variations. The proposed system also includes rising and falling edge detectors for low power and accurate zero current detection, as well as a digital voltage regulation controller for stable dc supply with fast response.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Dang-An Nguyen, Hyungseok Nam, Chulhun Seo
Summary: This letter presents a compact and high-efficiency Class-F rectifier with a novel multiharmonic termination network. The implemented rectifier achieves superior power conversion efficiency and compactness.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Shufan Li, Fang Li, Rong Zhang, Chengxuan Tao, Lifang Wang
Summary: Modeling is necessary for designing and controlling a wireless power transfer (WPT) system. First harmonic analysis (FHA) is a simple and effective method, but its accuracy may be affected by load variations. This article analyzes harmonics in the primary side of an LCC-S compensation network based WPT system, providing a more accurate waveform model of the inverter's output current compared to the FHA-based method. Time-domain analysis is also conducted in the secondary side to derive an equivalent input impedance with nonlinear characteristics.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Hany A. A. Atallah, Rasha Hussein, Adel B. B. Abdel-Rahman
Summary: This brief introduces a novel design for wireless power transfer in dual bands with reconfiguration operation. It utilizes a fixed band at 190 MHz and a second band that can be tuned from 1.1 GHz to 1.4 GHz. The system consists of a spiral resonator with a varactor diode for the tuned band and a spiral resonator with a surface mounted capacitor for the fixed band. The system achieved high efficiency and showed good agreement between measurement and simulation.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Fatemeh Nasr Esfahani, Seyed M. Madani, Mehdi Niroomand, Alireza Safaee
Summary: The efficiency of wireless power transfer (WPT) systems is affected by non-monotonic variations in the coupling coefficient. The frequency splitting phenomenon, characterized by minimal efficiency at the natural resonant frequency and two peaks around it, occurs in very short distances or strong-coupling cases. On the other hand, WPT capability decreases for long distances or weak coupling cases. Therefore, this paper proposes a real-time fixed-frequency adaptive impedance matching method for WPT systems with varying distances to improve efficiency.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Engineering, Electrical & Electronic
Zhifan Li, Qijun Deng, Fengwei Chen, Pan Sun, Jiangtao Liu, Wenshan Hu, Hong Zhou
Summary: This article proposes a method of input design for wireless power transfer (WPT) systems based on receding horizon D-optimization. The system's dynamic behavior is characterized by a discrete-time, single-input, single-output (SISO) model, and the model parameters are estimated using a recursive least-squares (RLS) method. The excitation signal of the system is designed based on receding horizon D-optimization to improve the quality of parameter estimates. The sequential quadratic programming (SQP) method is employed to solve the receding horizon D-optimization for improving convergence and efficiency of the input design process. Numerical and experimental results demonstrate the effectiveness of the proposed method.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Energy & Fuels
Jinwook Kim, Do-Hyeon Kim, Jieun Kim, Young-Jin Park
Summary: The proposed WPT system utilizes two self-resonant coils and ferrite core transformers to achieve efficient wireless power transfer over medium distances. By changing the turn ratio of the transformers, optimal impedance matching conditions for maximum power transfer efficiency at different distances can be met while maintaining minimal Q-factor degradation.
Article
Engineering, Electrical & Electronic
Huan Zhang, Yaoxia Shao, Ming Liu, Chengbin Ma
Summary: This article introduces a compact and robust MHz WPT system design that achieves high efficiency and stability over a wide range of loads through reactance compression and parameter design. Experimental verification has demonstrated the improved system performance in various aspects.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
