IEICE TRANSACTIONS on Electronics
Research on the Impedance Characteristic of a Two-Coil Wireless Power Transfer System
Summary :
Wireless power transfer (WPT) via coupled magnetic resonances has more than ten years history of development. However, it appears frequency splitting phenomenon in the over-coupled region, thus, the output power of the two-coil WPT system achieves the maximum output power at the two splitting angular frequencies and not at the natural resonant angular frequency. By investigating the relationship between the impedances of the transmitter side and receiver side, we found that WPT system is a power superposition system, and the reasons were given to explaining how to appear the frequency splitting and impact on the maximum output power of the system in details. First, the circuit model was established and transfer characteristics of the two-coil WPT system were studied by utilizing circuit theories. Second, the mechanism of the power superposition of the WPT system was carefully researched. Third, the relationship between the impedances of the transmitter side and receiver side was obtained by investigating the impedance characteristics of a two-coil WPT system, and also the impact factors of the maximum output power of the system were obtained by using a power superposition mechanism. Finally, the experimental circuit was designed and experimental results are well consistent with the theoretical analysis.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E101-C No.9 pp.711-717
- Publication Date
- 2018/09/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E101.C.711
- Type of Manuscript
- PAPER
- Category
- Electronic Circuits
Authors
Suqi LIU
Central South University
Jianping TAN
Central South University
Xue WEN
Central South University
Keyword
Latest Issue
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Suqi LIU, Jianping TAN, Xue WEN, "Research on the Impedance Characteristic of a Two-Coil Wireless Power Transfer System" in IEICE TRANSACTIONS on Electronics,
vol. E101-C, no. 9, pp. 711-717, September 2018, doi: 10.1587/transele.E101.C.711.
Abstract: Wireless power transfer (WPT) via coupled magnetic resonances has more than ten years history of development. However, it appears frequency splitting phenomenon in the over-coupled region, thus, the output power of the two-coil WPT system achieves the maximum output power at the two splitting angular frequencies and not at the natural resonant angular frequency. By investigating the relationship between the impedances of the transmitter side and receiver side, we found that WPT system is a power superposition system, and the reasons were given to explaining how to appear the frequency splitting and impact on the maximum output power of the system in details. First, the circuit model was established and transfer characteristics of the two-coil WPT system were studied by utilizing circuit theories. Second, the mechanism of the power superposition of the WPT system was carefully researched. Third, the relationship between the impedances of the transmitter side and receiver side was obtained by investigating the impedance characteristics of a two-coil WPT system, and also the impact factors of the maximum output power of the system were obtained by using a power superposition mechanism. Finally, the experimental circuit was designed and experimental results are well consistent with the theoretical analysis.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E101.C.711/_p
Copy
@ARTICLE{e101-c_9_711,
author={Suqi LIU, Jianping TAN, Xue WEN, },
journal={IEICE TRANSACTIONS on Electronics},
title={Research on the Impedance Characteristic of a Two-Coil Wireless Power Transfer System},
year={2018},
volume={E101-C},
number={9},
pages={711-717},
abstract={Wireless power transfer (WPT) via coupled magnetic resonances has more than ten years history of development. However, it appears frequency splitting phenomenon in the over-coupled region, thus, the output power of the two-coil WPT system achieves the maximum output power at the two splitting angular frequencies and not at the natural resonant angular frequency. By investigating the relationship between the impedances of the transmitter side and receiver side, we found that WPT system is a power superposition system, and the reasons were given to explaining how to appear the frequency splitting and impact on the maximum output power of the system in details. First, the circuit model was established and transfer characteristics of the two-coil WPT system were studied by utilizing circuit theories. Second, the mechanism of the power superposition of the WPT system was carefully researched. Third, the relationship between the impedances of the transmitter side and receiver side was obtained by investigating the impedance characteristics of a two-coil WPT system, and also the impact factors of the maximum output power of the system were obtained by using a power superposition mechanism. Finally, the experimental circuit was designed and experimental results are well consistent with the theoretical analysis.},
keywords={},
doi={10.1587/transele.E101.C.711},
ISSN={1745-1353},
month={September},}
Copy
TY - JOUR
TI - Research on the Impedance Characteristic of a Two-Coil Wireless Power Transfer System
T2 - IEICE TRANSACTIONS on Electronics
SP - 711
EP - 717
AU - Suqi LIU
AU - Jianping TAN
AU - Xue WEN
PY - 2018
DO - 10.1587/transele.E101.C.711
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E101-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2018
AB - Wireless power transfer (WPT) via coupled magnetic resonances has more than ten years history of development. However, it appears frequency splitting phenomenon in the over-coupled region, thus, the output power of the two-coil WPT system achieves the maximum output power at the two splitting angular frequencies and not at the natural resonant angular frequency. By investigating the relationship between the impedances of the transmitter side and receiver side, we found that WPT system is a power superposition system, and the reasons were given to explaining how to appear the frequency splitting and impact on the maximum output power of the system in details. First, the circuit model was established and transfer characteristics of the two-coil WPT system were studied by utilizing circuit theories. Second, the mechanism of the power superposition of the WPT system was carefully researched. Third, the relationship between the impedances of the transmitter side and receiver side was obtained by investigating the impedance characteristics of a two-coil WPT system, and also the impact factors of the maximum output power of the system were obtained by using a power superposition mechanism. Finally, the experimental circuit was designed and experimental results are well consistent with the theoretical analysis.
ER -
English
