A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer

Cheng YANG; Koichi TSUNEKAWA

doi:10.1587/transcom.2015EBP3310

A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer

Cheng YANG, Koichi TSUNEKAWA

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This study proposes a novel resonator design that uses tightly coupled parallel coils to improve the quality factor (Q factor) in coupled magnetic resonance wireless power transfer. Depending on the characteristics of the tightly coupled parallel-connected coils, the proposed resonator can offer significantly reduced resistance with very little self-inductance loss. A double-layer spiral coil structure is used for resonator design and evaluating its characteristics. Measured results show that a resonator consisting of two identical, tightly coupled parallel double-layer spiral coils can match the Q factor of a conventional double-layer spiral coil with the same number of turns, even though its equivalent resistance is approximately 75% less. Moreover, the system power transfer performance of the resonator was measured under the impedance matching condition. To further reduce the resistance, we propose another resonator comprising of three parallel and tightly coupled double-layer spiral coils, and measure its equivalent resistance characteristics for different wire gap sizes.

Publication: IEICE TRANSACTIONS on Communications Vol.E99-B No.3 pp.685-694

Publication Date: 2016/03/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2015EBP3310

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Cheng YANG
Chubu University
Koichi TSUNEKAWA
Chubu University

Keyword

wireless power transfer, coupled magnetic resonance, resonator, Q factor, transfer efficiency

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Cheng YANG, Koichi TSUNEKAWA, "A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer" in IEICE TRANSACTIONS on Communications, vol. E99-B, no. 3, pp. 685-694, March 2016, doi: 10.1587/transcom.2015EBP3310.
Abstract: This study proposes a novel resonator design that uses tightly coupled parallel coils to improve the quality factor (Q factor) in coupled magnetic resonance wireless power transfer. Depending on the characteristics of the tightly coupled parallel-connected coils, the proposed resonator can offer significantly reduced resistance with very little self-inductance loss. A double-layer spiral coil structure is used for resonator design and evaluating its characteristics. Measured results show that a resonator consisting of two identical, tightly coupled parallel double-layer spiral coils can match the Q factor of a conventional double-layer spiral coil with the same number of turns, even though its equivalent resistance is approximately 75% less. Moreover, the system power transfer performance of the resonator was measured under the impedance matching condition. To further reduce the resistance, we propose another resonator comprising of three parallel and tightly coupled double-layer spiral coils, and measure its equivalent resistance characteristics for different wire gap sizes.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2015EBP3310/_p

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@ARTICLE{e99-b_3_685,
author={Cheng YANG, Koichi TSUNEKAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer},
year={2016},
volume={E99-B},
number={3},
pages={685-694},
abstract={This study proposes a novel resonator design that uses tightly coupled parallel coils to improve the quality factor (Q factor) in coupled magnetic resonance wireless power transfer. Depending on the characteristics of the tightly coupled parallel-connected coils, the proposed resonator can offer significantly reduced resistance with very little self-inductance loss. A double-layer spiral coil structure is used for resonator design and evaluating its characteristics. Measured results show that a resonator consisting of two identical, tightly coupled parallel double-layer spiral coils can match the Q factor of a conventional double-layer spiral coil with the same number of turns, even though its equivalent resistance is approximately 75% less. Moreover, the system power transfer performance of the resonator was measured under the impedance matching condition. To further reduce the resistance, we propose another resonator comprising of three parallel and tightly coupled double-layer spiral coils, and measure its equivalent resistance characteristics for different wire gap sizes.},
keywords={},
doi={10.1587/transcom.2015EBP3310},
ISSN={1745-1345},
month={March},}

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TY - JOUR
TI - A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer
T2 - IEICE TRANSACTIONS on Communications
SP - 685
EP - 694
AU - Cheng YANG
AU - Koichi TSUNEKAWA
PY - 2016
DO - 10.1587/transcom.2015EBP3310
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E99-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2016
AB - This study proposes a novel resonator design that uses tightly coupled parallel coils to improve the quality factor (Q factor) in coupled magnetic resonance wireless power transfer. Depending on the characteristics of the tightly coupled parallel-connected coils, the proposed resonator can offer significantly reduced resistance with very little self-inductance loss. A double-layer spiral coil structure is used for resonator design and evaluating its characteristics. Measured results show that a resonator consisting of two identical, tightly coupled parallel double-layer spiral coils can match the Q factor of a conventional double-layer spiral coil with the same number of turns, even though its equivalent resistance is approximately 75% less. Moreover, the system power transfer performance of the resonator was measured under the impedance matching condition. To further reduce the resistance, we propose another resonator comprising of three parallel and tightly coupled double-layer spiral coils, and measure its equivalent resistance characteristics for different wire gap sizes.
ER -