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Optimization of Magnetic Field Focusing and Null Steering for Selective Wireless Power Transfer

Title
Optimization of Magnetic Field Focusing and Null Steering for Selective Wireless Power Transfer
Author
이병훈
Keywords
Magnetic field focusing (MFF); magnetic resonance coupling (MRC);  steering; selective WPT; wireless power transmission (WPT)
Issue Date
2020-05
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON POWER ELECTRONICS, v. 35, no. 5, page. 4622-4633
Abstract
Wireless power transfer (WPT) has recently emerged as a prominent technology to liberate various applications with small devices from limited mobility and design constraints. Among various techniques, magnetic field focusing (MFF) with multiple transmit (Tx) coils have been known as a powerful solution to enhance the efficiency of power transfer to multiple receivers (Rxs) in midrange WPT. However, in such MFF techniques, even unintended Rx may suffer from unwanted power due to leakage, which may disrupt the operations of the devices. Motivated by this issue, in this article, we consider selective magnetic resonance coupling (MRC)-based WPT, which enables WPT systems to better shape power distribution only focusing on the intended Rxs while leakages to the unintended Rx are suppressed. To this end, we first formulate the selectivity requirement of WPT as an optimization problem. Then, we propose a method to obtain the optimal Tx voltage vector for simultaneous MFF and -steering optimization. Simulation and experimental results validate the theoretical analysis and the proposed method in practical scenarios.
URI
https://ieeexplore.ieee.org/document/8832163https://repository.hanyang.ac.kr/handle/20.500.11754/167121
ISSN
0885-8993; 1941-0107
DOI
10.1109/TPEL.2019.2940739
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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