Journal ArticleDOI
Wireless Power Transfer to Multiple Loads Over Various Distances Using Relay Resonators
TLDR
In this article, the authors used the intermediate-coil structure to transfer the same power to multiple loads over various distances, which indicates that the intermediate coils work both as relay resonators and as power receivers.Abstract:
Resonant wireless power transfer has attracted much attention in recent decades. In some practical applications such as wireless sensor networks, multiple-load transfer over various distances is required. In this letter, the intermediate-coil structure is utilized to transfer the same power to multiple loads over various distances, which indicates that the intermediate coils work both as relay resonators and as power receivers. The mathematical model is built and in-depth analysis is conducted. Four important factors, namely the source matching factor, the load matching factor, the transfer quality factor, and the reflected impedance factor, are employed to build the mathematical model of $n$ -load transfer. The conditions to transmit the same power to all the loads attached in each relay resonator are investigated. The optimal load resistance and the highest efficiency with the same load resistance are derived. The theoretical calculations and the experimental results of double-load and three-load transfer confirm the analysis.read more
Citations
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Journal ArticleDOI
Compensation of Cross Coupling in Multiple-Receiver Wireless Power Transfer Systems
TL;DR: This paper aims at providing a general analysis on the multiple-receiver WPT systems and compensation for the influence of the cross coupling and shows that theoretically by having derived optimal load reactances, the important system characteristics can be preserved.
Journal ArticleDOI
Load-Independent Wireless Power Transfer System for Multiple Loads Over a Long Distance
Chenwen Cheng,Fei Lu,Zhe Zhou,Weiguo Li,Chong Zhu,Hua Zhang,Zhanfeng Deng,Xi Chen,Chunting Chris Mi +8 more
TL;DR: A novel long-distance wireless power transfer (WPT) system using repeater coils is proposed to provide power supplies for the driver circuits in high-voltage applications, such as flexible alternative current transmission systems.
Journal ArticleDOI
Magnetically Coupled Resonance WPT: Review of Compensation Topologies, Resonator Structures with Misalignment, and EMI Diagnostics
TL;DR: A benchmark is set in order to provide a deep comparison between different WPT systems according to different criteria: compensation topologies; resonator structures with misalignment effects; and, electromagnetic field (EMF) diagnostics and electromagnetic field interference (EMI), including the WPT-related standards and EMI and EMF reduction methods.
Journal ArticleDOI
A 6.78 MHz Multiple-Receiver Wireless Power Transfer System With Constant Output Voltage and Optimum Efficiency
TL;DR: In this paper, the authors developed a 6.78 MHz multiple-receiver wireless power transfer system driven by a Class E power amplifier, where the loads and input voltage were designed as two control variables.
Journal ArticleDOI
A Multi-Load Wireless Power Transfer System With Series-Parallel-Series Compensation
TL;DR: With a proper resonant condition proposed in this letter, the constant load current can be obtained for all the loads when neglecting the coils’ parasitic resistances.
References
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Journal ArticleDOI
Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers
TL;DR: In this paper, the magnetic resonance coupling between source and load coils is achieved with lumped capacitors terminating the coils, and a circuit model is developed to describe the system with a single receiver and extended to describe two receivers.
Journal ArticleDOI
Effect of Coupling Between Multiple Transmitters or Multiple Receivers on Wireless Power Transfer
Dukju Ahn,Songcheol Hong +1 more
TL;DR: Using the proposed frequency adjustments, 51-65-W power is transferred with 45%-57% efficiency, even with very low coupling coefficients of 0.025-0.063 from TX to RX, which is significant compared to the unadjusted cases where less than 4 W is transfer with only 5%-33% efficiency.
Journal ArticleDOI
Wireless Power Transfer: Metamaterials and Array of Coupled Resonators
TL;DR: This paper will report some recent progress on wireless power transfer (WPT) based on resonant coupling, and the use of metamaterials and array of coupled resonators.
Journal ArticleDOI
Wireless power domino-resonator systems with noncoaxial axes and circular structures
TL;DR: In this paper, a general analysis on wireless power domino-resonator systems with non-coaxial axes is presented, and the theoretical results have been favorably verified with practical measurements obtained from two circular systems.
Journal ArticleDOI
Frequency Decrease Analysis of Resonant Wireless Power Transfer
TL;DR: In this article, two fundamental structures for RWPT are analyzed and the expressions of the transfer efficiency are deduced, and the transfer quality factor and the load matching factor are two important factors of achieving high transfer efficiency.