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Wide-range robust wireless power transfer using heterogeneously coupled and flippable neutrals in parity-time symmetry

Cited 18 time in Web of Science Cited 21 time in Scopus
Authors

Kim, Hyunwoo; Yoo, Seungwon; Joo, Hyunwoo; Lee, Jongheon; An, Donggeun; Nam, Seonghyeon; Han, Hyungu; Kim, Dae-Hyeong; Kim, Sanghoek

Issue Date
2022-06
Publisher
American Association for the Advancement of Science
Citation
Science Advances, Vol.8 No.24, p. eabo4610
Abstract
Recently, stationary wireless power transfer (WPT) has been widely adopted in commercial devices. However, the current WPT configuration is limited in its operational area and susceptible to operating condition changes, impeding its applications for dynamic environments. To overcome the limitations, we propose a WPT system with laterally aligned neutral elements in parity-time (PT) symmetry, which can widen the operational area with the number of neutrals N. Compared to the conventional multiple-input-single-output WPT, the dimension of system complexity is substantially reduced from R × CN to RN+1 because the neutral amplitudes are simply controlled by coupling capacitors. The operational frequency is automatically adjusted to a real eigenvalue of the PT-symmetric system to achieve high voltage gain and efficiency, making the system robust. The performance of the system calculated by the coupled-mode theory was experimentally verified with rigid and flexible types of receivers, confirming its potential in both industrial and biomedical electronics.
ISSN
2375-2548
URI
https://hdl.handle.net/10371/184499
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  • College of Engineering
  • School of Chemical and Biological Engineering
Research Area Materials Science

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