Realization of an Optimum Load for Wireless Power Transfer System

Authors

  • Chaoling Wang School of Electronics and Information Engineering Beihang University, Beijing, 100191, China
  • Qi Wu 1) School of Electronics and Information Engineering Beihang University, Beijing, 100191, China 2) Department of Fundamental Research Zhongguancun Laboratory, Beijing, China

DOI:

https://doi.org/10.13052/2023.ACES.J.380907

Keywords:

Coupling coefficient, load impedance, magnetic resonance, wireless power transfer

Abstract

Wireless power transfer (WPT) system has been an integral part of personal living since its regained interest, especially the magnetic resonance (MR) scheme. MR-WPT scheme suffers, however, change of the coil separation distance and various alignment errors. This paper reports a realization of optimum load for MR-WPT system, which can change the loading impedance accordingly for different coupling coefficients between the Tx and Rx coils. A simple varactor circuit is adopted to realize the optimum load curve. Usefulness of this is demonstrated through both the steady and transient analysis. The proposed realization relies on an open-circuit scheme, and hence it is suitable for scenarios with low-cost and small-size requirements.

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Author Biographies

Chaoling Wang, School of Electronics and Information Engineering Beihang University, Beijing, 100191, China

Chaoling Wang received the B.E. Degree from Airforce Engineering University in communication engineering. His research interest includes fiber communications and photoelectronic imaging technology. He is currently pursuing the Ph.D. degree at Beihang University, Beijing, China.

Qi Wu, 1) School of Electronics and Information Engineering Beihang University, Beijing, 100191, China 2) Department of Fundamental Research Zhongguancun Laboratory, Beijing, China

Qi Wu received the B.S. degree from East China Normal University, Shanghai, China, and the Ph.D. degree from Shanghai Jiao Tong University, Shanghai, China, both in electrical engineering, in 2004 and 2009, respectively.

He joined the faculty of School of Electronics and Information Engineering, Beihang University, Beijing, China, in 2009 and now is a full professor. During 2011 and 2012, he was a visiting scholar in the Department of Electrical Engineering, University of California, Los Angeles. During 2014 and 2016, he was an Alexander von Humboldt Fellow in the Institute of Electromagnetic Theory, Technical University of Hamburg, Germany. He has authored over 40 journal papers and two books and holds 20 patents as the first inventor. His research interests include broadband antennas, computational electromagnetics, and related EMC topics.

Dr. Wu received the Young Scientist Award from the International Union of Radio Science (URSI) in 2011, the Nominee Award for Excellent Doctoral Dissertation from the National Minister of Education in 2012, Young Scientist Award of APEMC in 2016, and Excellent Researcher from Chinese institute of Electronics in 2020.

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Published

2023-09-30

How to Cite

[1]
C. . Wang and Q. . Wu, “Realization of an Optimum Load for Wireless Power Transfer System”, ACES Journal, vol. 38, no. 09, pp. 681–686, Sep. 2023.

Issue

2023: Vol 38 Iss 9

Section

Special Issue on ACES-China 2022 Conference