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Analysis and Optimization of Three-Resonator Wireless Power Transfer System for Predetermined-Goals Wireless Power Transmission

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  • Jin Zhang

    (College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China)

  • Chonghu Cheng

    (College of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China)

Abstract

Three-resonator wireless power transfer (WPT) systems have been proposed to improve the power transfer efficiency (PTE) and power delivered to the load (PDL) in recent years. However, analysis formulas of a three-resonator WPT system are complicated, and the parameters for clarifying the transfer characteristics of this system are difficult to extract. In this paper, concise formulas for analyzing PTE and PDL of the three-resonator system are derived by introducing three factors. Diagram discriminance based on the derived formulas is proposed to obtain the frequency splitting criterions of PTE and PDL in this system. Further, at the transfer distances, where the PTE and PDL are low at original frequency due to frequency splitting phenomenon, the two predetermined-goals of maximizing PTE and PDL are achieved by optimizing coupling strength between the three resonators. The third predetermined-goal of obtaining a constant amount of PDL transfer at maximum PTE is also implemented based on basic algorithms in numerical software. Finally, Simulation and measurement results verify the correctness of analyzing the transfer characteristics of three-resonator WPT system using the presented concise formulas and discriminance. Moreover, effectiveness of realizing the three predetermined-goals via the proposed optimization method is confirmed with experiments.

Suggested Citation

  • Jin Zhang & Chonghu Cheng, 2016. "Analysis and Optimization of Three-Resonator Wireless Power Transfer System for Predetermined-Goals Wireless Power Transmission," Energies, MDPI, vol. 9(4), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:4:p:274-:d:67744
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    References listed on IDEAS

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    1. Yabiao Gao & Kathleen Blair Farley & Zion Tsz Ho Tse, 2015. "A Uniform Voltage Gain Control for Alignment Robustness in Wireless EV Charging," Energies, MDPI, vol. 8(8), pages 1-16, August.
    2. Longzhao Sun & Houjun Tang & Yingyi Zhang, 2015. "Determining the Frequency for Load-Independent Output Current in Three-Coil Wireless Power Transfer System," Energies, MDPI, vol. 8(9), pages 1-12, September.
    3. Charles Moorey & William Holderbaum & Ben Potter, 2015. "Investigation of High-Efficiency Wireless Power Transfer Criteria of Resonantly-Coupled Loops and Dipoles through Analysis of the Figure of Merit," Energies, MDPI, vol. 8(10), pages 1-21, October.
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    Cited by:

    1. Chaoqiang Jiang & K. T. Chau & Chunhua Liu & Christopher H. T. Lee, 2017. "An Overview of Resonant Circuits for Wireless Power Transfer," Energies, MDPI, vol. 10(7), pages 1-20, June.
    2. Weitong Chen & Chunhua Liu & Christopher H.T. Lee & Zhiqiang Shan, 2016. "Cost-Effectiveness Comparison of Coupler Designs of Wireless Power Transfer for Electric Vehicle Dynamic Charging," Energies, MDPI, vol. 9(11), pages 1-13, November.
    3. Ching-Yao Liu & Chih-Chiang Wu & Li-Chuan Tang & Yueh-Tsung Shieh & Wei-Hua Chieng & Edward-Yi Chang, 2023. "Resonant Mechanism for a Long-Distance Wireless Power Transfer Using Class E PA and GaN HEMT," Energies, MDPI, vol. 16(9), pages 1-21, April.

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