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 always larger than that of conventional two-coil-basedWPT systems, and second, as the coupling coefficient increases, the TE of two-coil-basedWPT 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.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-05
Language
English
Keywords

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Citation

IEEE TRANSACTIONS ON POWER ELECTRONICS, v.32, no.5, pp.3297 - 3300

ISSN
0885-8993
DOI
10.1109/TPEL.2017.2651155
URI
http://hdl.handle.net/10203/222677
Appears in Collection
EE-Journal Papers(저널논문)
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