Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System

Jeongman Lee; Kisong Lee; Dong Ho Cho

doi:10.1109/TPEL.2017.2651155

Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System

Jeongman Lee
, Kisong Lee
, Dong Ho Cho

Department of Information and Communication Engineering

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

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.

Original language	English
Article number	7812572
Pages (from-to)	3297-3300
Number of pages	4
Journal	IEEE Transactions on Power Electronics
Volume	32
Issue number	5
DOIs	https://doi.org/10.1109/TPEL.2017.2651155
State	Published - May 2017

Keywords

Equivalent circuit model (ECM)
relay
stability
wireless power transfer (WPT)

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10.1109/TPEL.2017.2651155

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title = "Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System",

abstract = "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.",

keywords = "Equivalent circuit model (ECM), relay, stability, wireless power transfer (WPT)",

author = "Jeongman Lee and Kisong Lee and Cho, \{Dong Ho\}",

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T1 - Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System

AU - Lee, Jeongman

AU - Lee, Kisong

AU - Cho, Dong Ho

PY - 2017/5

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N2 - 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.

AB - 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.

KW - Equivalent circuit model (ECM)

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KW - stability

KW - wireless power transfer (WPT)

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JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

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Stability Improvement of Transmission Efficiency Based on a Relay Resonator in a Wireless Power Transfer System

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