Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System
We investigate the stability of the transmission efficiency (TE) in nonradiative wireless power transfer (WPT) using a relay resonator. An equivalent circuit model is used to show mathematically that two suppositions are satisfied in an overcoupled region: first, the TE of relay-based WPT systems is...
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Published in | IEEE transactions on power electronics Vol. 32; no. 5; pp. 3297 - 3300 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.05.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | We investigate the stability of the transmission efficiency (TE) in nonradiative wireless power transfer (WPT) using a relay resonator. An equivalent circuit model is used to show mathematically that two suppositions are satisfied in an overcoupled region: first, the TE of relay-based WPT systems is always larger than that of conventional two-coil-based WPT systems, and second, as the coupling coefficient increases, the TE of two-coil-based WPT systems decreases severely, while the TE of relay-based WPT systems increases slightly. Consequently, we surmise that an intermediate relay can be used to achieve higher TE and stability, compared with conventional two-coil-based WPT systems. We verify that our analytical results are in good agreement with the experimental ones. |
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ISSN: | 0885-8993 1941-0107 |
DOI: | 10.1109/TPEL.2017.2651155 |