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Circuit Model and Analysis of Multi-Load Wireless Power Transfer System Based on Parity-Time Symmetry

Author

Listed:
  • Chengxin Luo

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China)

  • Dongyuan Qiu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China)

  • Manhao Lin

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China)

  • Bo Zhang

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China)

Abstract

In the multi-load wireless power transfer (WPT) system, the output power and transfer efficiency will drop significantly with the change of distance between transmitter and receiver. Power distribution among multiple loads is also a major challenge. In order to solve these problems, a novel multi-load WPT system based on parity–time symmetry (PT-WPT) is proposed in this paper. Firstly, the multi-load PT-WPT system is modeled based on the circuit model. Then, the transmission characteristics of the multi-load PT-WPT system are analyzed. It is found that constant output power with constant transfer efficiency can be maintained against the variation of coupling coefficient, and the power distribution relationship among loads is only related to the coupling coefficient. Further, power distribution under different coupling situations is analyzed in detail to meet different power demands. Finally, taking a dual-load PT-WPT system as an example, the system parameters are designed and the circuit simulation is carried out. The simulation results are consistent with the theoretical analysis, which shows that PT symmetry can be applied to the multi-load WPT system to achieve constant output power, constant transfer efficiency, and power distribution simultaneously.

Suggested Citation

  • Chengxin Luo & Dongyuan Qiu & Manhao Lin & Bo Zhang, 2020. "Circuit Model and Analysis of Multi-Load Wireless Power Transfer System Based on Parity-Time Symmetry," Energies, MDPI, vol. 13(12), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3260-:d:375616
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    References listed on IDEAS

    as
    1. Gongjun Liu & Bo Zhang & Wenxun Xiao & Dongyuan Qiu & Yanfeng Chen & Jiu Guan, 2018. "Omnidirectional Wireless Power Transfer System Based on Rotary Transmitting Coil for Household Appliances," Energies, MDPI, vol. 11(4), pages 1-16, April.
    2. Matthew J Chabalko & Mohsen Shahmohammadi & Alanson P Sample, 2017. "Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer," PLOS ONE, Public Library of Science, vol. 12(2), pages 1-14, February.
    3. Xujian Shu & Bo Zhang, 2018. "Single-Wire Electric-Field Coupling Power Transmission Using Nonlinear Parity-Time-Symmetric Model with Coupled-Mode Theory," Energies, MDPI, vol. 11(3), pages 1-10, March.
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    Cited by:

    1. Giuseppina Monti & Mauro Mongiardo & Ben Minnaert & Alessandra Costanzo & Luciano Tarricone, 2020. "Optimal Terminations for a Single-Input Multiple-Output Resonant Inductive WPT Link," Energies, MDPI, vol. 13(19), pages 1-21, October.

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