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Continuously Variable-Frequency Energy-Encrypted Wireless Power Transfer

Author

Listed:
  • Wei Liu

    (Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China)

  • K. T. Chau

    (Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China)

  • W. H. Lam

    (Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China)

  • Zhen Zhang

    (Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
    School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

Abstract

This paper proposes and implements a novel continuously variable-frequency energy-encrypted wireless power transfer (WPT) system for wireless energy security in multi-receiver applications. To prevent wireless energy from being illegally stolen, the proposed chaotic 2-D frequency-and-duration encryption (FDE) technology directly generates well-defended security keys to guarantee energy security. An LCC-compensated transmitter without using a switched-capacitor array is proposed to competently encrypt the wireless energy into burglarproof energy packages, which are decrypted only by authorized receivers. Then, the concept of the static variable capacitor (SVC) is presented to achieve dynamical impedance compensation for wireless energy decryption in authorized receivers with knowledge of security keys. Consequently, the proposed energy-encrypted SVC-based WPT system can flexibly encrypt and decrypt wireless energy packages in a continuous frequency-and-duration adjustment rather than in a discrete way, thus greatly improving energy security performance. Theoretical analysis, computer simulation and experimental results are provided to verify the feasibility of the proposed continuously energy-encrypted SVC-based WPT system.

Suggested Citation

  • Wei Liu & K. T. Chau & W. H. Lam & Zhen Zhang, 2019. "Continuously Variable-Frequency Energy-Encrypted Wireless Power Transfer," Energies, MDPI, vol. 12(7), pages 1-18, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:7:p:1286-:d:219794
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    References listed on IDEAS

    as
    1. Zhengchao Yan & Yiming Zhang & Baowei Song & Kehan Zhang & Tianze Kan & Chris Mi, 2019. "An LCC-P Compensated Wireless Power Transfer System with a Constant Current Output and Reduced Receiver Size," Energies, MDPI, vol. 12(1), pages 1-14, January.
    2. Chaoqiang Jiang & K.T. Chau & Chunhua Liu & Wei Han, 2017. "Wireless DC Motor Drives with Selectability and Controllability," Energies, MDPI, vol. 10(1), pages 1-15, January.
    3. Sangjoon Ann & Woo-Young Lee & Gyu-Yeong Choe & Byoung Kuk Lee, 2019. "Integrated Control Strategy for Inductive Power Transfer Systems with Primary-Side LCC Network for Load-Average Efficiency Improvement," Energies, MDPI, vol. 12(2), pages 1-13, January.
    4. 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.
    5. Xu Liu & Lindsay Clare & Xibo Yuan & Chonglin Wang & Jianhua Liu, 2017. "A Design Method for Making an LCC Compensation Two-Coil Wireless Power Transfer System More Energy Efficient Than an SS Counterpart," Energies, MDPI, vol. 10(9), pages 1-29, September.
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    Cited by:

    1. Liu, Wei & Chau, K.T. & Tian, Xiaoyang & Wang, Hui & Hua, Zhichao, 2023. "Smart wireless power transfer — opportunities and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 180(C).

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