Article
Engineering, Electrical & Electronic
Jinde Wu, Xin Dai, Yue Sun, Yanling Li
Summary: This article proposes a flexible repeater power transmission mode for multinode WPT system, allowing for flexible switching of node roles to meet dynamic power transmission requirements, utilizing reusing topology. Experimental results confirm the effectiveness of the method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hongjie Wang, Ujjwal Pratik, Aleksandar Jovicic, Nazmul Hasan, Zeljko Pantic
Summary: Dynamic charging is proposed as a viable option for various electric vehicles, which can reduce the onboard energy storage size, remove range limitations, and increase operating time. The method utilizes existing transmitter coils and power electronics modules to establish a precise detection system, along with a control algorithm for accurate charger activation and deactivation. Experimental validation of high-speed dynamic charging is conducted with the proposed approach, showcasing its benefits for different vehicle applications.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Hwa-Rang Cha, Kwang-Rock Park, Tae-Jin Kim, Rae-Young Kim
Summary: An optimal magnetic structure was proposed to improve the efficiency of omnidirectional wireless power transfer without increasing the size of the transmitter. Through finite element analysis and multiobjective optimization design, the optimal magnetic structure was selected and a prototype was built for performance verification. Experimental results demonstrated that the optimal magnetic structure improved system efficiency in three-dimensional space.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hyungchul Kim, Seon-Jae Jeon, Dong-Wook Seo
Summary: This paper investigates the influence of mutual inductance ratio on the efficiency of multi-transmitter wireless power transfer systems. It is found that when the ratio of the minimum to maximum mutual inductances is 0.5 or more, systems with identical transmitter currents can achieve near-optimal efficiency without the need for current fine-tuning. Additionally, a stacked multi-transmitter system is proposed, which achieves high mutual inductance ratios and satisfies the condition, leading to a significant improvement in the transmission distance.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Usama Anwar, Zhaoyi Liu, Dejan Markovici
Summary: This article presents an analysis and design of a high-efficiency, 6.78-MHz burst-mode controlled inductive wireless power transfer system without back-channel communication. The power flow between the transmitter and receiver is controlled through load modulation. By utilizing the inherent load modulation properties of the system, the need for traditional back-channel communication is eliminated. Experiments show that the quality factor of the transmitter can be detected to eliminate the back-channel communication. The proposed system only requires an additional switch in the receiver power stage to regulate the output voltage.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Eduard Mindubaev, Konstantin Gurov, Sergey Selishchev, Arseny Danilov
Summary: This paper presents an analysis of the tolerance of the inductive power transfer system to coils misalignment. Two new metrics are introduced for evaluating the system's tolerance. Design principles and an optimization process for coils are provided. The results show that optimized coils can improve the system's tolerance.
Article
Automation & Control Systems
Yiming Zhang, Shuxin Chen, Xin Li, Yi Tang
Summary: This paper proposes a dual-side phase-shift implementation method for wireless power transfer, which regulates the phase difference between the primary-side power and driving windings to control the phase difference between the dual-side power windings, achieving independent dual-side regulation from power transfer.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Lin Yang, Shuai Jiang, Can Wang, Changsong Cai, Li Zhang
Summary: In this manuscript, a compact dual-channel wireless power transfer system with a power-boosting function based on dual-sided decoupling coils is proposed. The system solves the problems of low semiconductor power rating, insufficient system compactness, and difficulty in system design in traditional high-power WPT systems. The proposed magnetic coupler allows the superposition of two independent WPT systems without cross-coupling interference, enabling power boosting while ensuring compactness. The theoretical analysis, output power comparison, and experimental results confirm the feasibility and magnetic decoupling characteristic of the proposed system.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zhen Zhang, Shen Shen, Zhenyan Liang, Stephan H. K. Eder, Ralph Kennel
Summary: This article proposes an enhanced constant current control method for wireless in-flight charging systems. By using an online-trained RBFNN, the expected constant current output for battery charging is ensured. The effectiveness of the proposed control scheme is validated with simulated and experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Review
Energy & Fuels
Emrullah Aydin, Mehmet Timur Aydemir, Ahmet Aksoz, Mohamed El Baghdadi, Omar Hegazy
Summary: This paper provides a comprehensive review of the Wireless Power Transfer (WPT) technology in electric vehicle (EV) charging systems, focusing on the Inductive Power Transfer (IPT) method. The review covers the history, design considerations, control methods, and health issues of IPT systems, with discussions on key factors such as coil design, operating frequency selection, and efficiency values.
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
Alexis Narvaez, Claudio Carretero, Ignacio Lope, Jesus Acero
Summary: The article presents the optimization procedure of an inductive power transmission (IPT) system using large size spiral printed circuit board (PCB) coils for high-power transfer. The use of PCBs for coil assembly provides advantages in the manufacturing process and offers a low-profile device suitable for space-constrained applications. The study explores the application of Litz-structure braiding techniques to achieve high energy efficiency in the PCB-based IPT system coils.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Electrical & Electronic
Maryam Heidarian, Samuel J. Burgess
Summary: Power transfer efficiency (PTE) is a key performance parameter in the development of resonant inductive power transfer (IPT) systems. A new figure-of-merit (FoM), called the strong coupling factor (P-scf), is proposed to find an optimum coil geometry for maximizing PTE.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Automation & Control Systems
Taejun Lim, Yongshik Lee
Summary: A stacked-coil technology has been demonstrated to address lateral misalignment in nonradiative wireless power transfer systems. The system consists of multiple layers of coils with various sizes, allowing for the best transfer efficiency coil pair to be switched on depending on the misalignment. Experimental results show that the transfer efficiency can be maintained at high levels under different misalignment conditions.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Automation & Control Systems
Eun S. Lee
Summary: This article proposes a switching frequency-modulation-based inductive power transfer system that provides wireless charging for scooters through magnetic in-band communication. The proposed system allows for charging even when the transmitter and receiver coils are misaligned, without the need for additional power converters. The use of magnetic in-band communication enables the modulation of the switching frequency to control the load power for charging the battery in the receiver side. This magnetic communication protocol is optimally designed for scooter wireless charging applications, reducing coil misalignment sensitivity and communication complexity.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Civil
Van-Duc Doan, Hiroshi Fujimoto, Takafumi Koseki, Tomio Yasuda, Hiroyuki Kishi, Toshiyuki Fujita
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2018)
Article
Energy & Fuels
Osamu Shimizu, Sakahisa Nagai, Toshiyuki Fujita, Hiroshi Fujimoto
Article
Engineering, Electrical & Electronic
Ryo Matsumoto, Toshiyuki Fujita, Hiroshi Fujimoto
Summary: Efficiency of wireless power transfer systems can be improved by compensating for self-inductance variations with controlled switched capacitors. A proposed control scheme eliminates the need for wireless communication by separately controlling the capacitors on the transmitter and receiver sides. Experimental results show significant improvements in both ac/ac efficiency and dc/dc efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
