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...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on power electronics Vol. 32; no. 5; pp. 3297 - 3300
Main Authors Lee, Jeongman, Lee, Kisong, Cho, Dong-Ho
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Circuit stability
Circuits
Coils
Coupling coefficients
Couplings
Equivalent circuit model (ECM)
Equivalent circuits
Magnetic resonance
Power efficiency
Relay
Relays
Resonators
stability
Stability analysis
Stability criteria
Transmission efficiency
wireless power transfer (WPT)
Wireless power transmission
Online AccessGet full text

Cover

More Information
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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2017.2651155