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Coupling-Independent Capacitive Wireless Power Transfer Using Frequency Bifurcation

Author

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  • Ben Minnaert

    (KU Leuven, DRAMCO, Department of Electrical Engineering (ESAT), Technology Campus Ghent, 9000 Ghent, Belgium)

  • Franco Mastri

    (Department of Electrical, Electronic and Information Engineering Guglielmo Marconi, University of Bologna, 40136 Bologna, Italy)

  • Nobby Stevens

    (KU Leuven, DRAMCO, Department of Electrical Engineering (ESAT), Technology Campus Ghent, 9000 Ghent, Belgium)

  • Alessandra Costanzo

    (Department of Electrical, Electronic and Information Engineering Guglielmo Marconi, University of Bologna, 40136 Bologna, Italy)

  • Mauro Mongiardo

    (Department of Engineering, University of Perugia, 06123 Perugia, Italy)

Abstract

Capacitive wireless power transfer can be realized by mutually coupled capacitors operating at a common resonant frequency. An optimal load exists that maximizes either the efficiency or the power transfer to the load. In this work, we utilize the frequency bifurcation effect to propose a frequency agile mode that allows for a nearly coupling-independent regime. We analytically determine the operating conditions of the coupling-independent mode based on the different system gains. In this way, we obtain a solution that achieves nearly constant efficiency and power transfer, even at varying coupling. We compare our results to inductive wireless power transfer where a perfect coupling-independent mode is achievable.

Suggested Citation

  • Ben Minnaert & Franco Mastri & Nobby Stevens & Alessandra Costanzo & Mauro Mongiardo, 2018. "Coupling-Independent Capacitive Wireless Power Transfer Using Frequency Bifurcation," Energies, MDPI, vol. 11(7), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:7:p:1912-:d:159347
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    References listed on IDEAS

    as
    1. Aqeel Mahmood Jawad & Rosdiadee Nordin & Sadik Kamel Gharghan & Haider Mahmood Jawad & Mahamod Ismail, 2017. "Opportunities and Challenges for Near-Field Wireless Power Transfer: A Review," Energies, MDPI, vol. 10(7), pages 1-28, July.
    2. Ben Minnaert & Nobby Stevens, 2017. "Conjugate Image Theory Applied on Capacitive Wireless Power Transfer," Energies, MDPI, vol. 10(1), pages 1-15, January.
    3. Barman, Surajit Das & Reza, Ahmed Wasif & Kumar, Narendra & Karim, Md. Ershadul & Munir, Abu Bakar, 2015. "Wireless powering by magnetic resonant coupling: Recent trends in wireless power transfer system and its applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1525-1552.
    4. Fei Lu & Hua Zhang & Chris Mi, 2017. "A Review on the Recent Development of Capacitive Wireless Power Transfer Technology," Energies, MDPI, vol. 10(11), pages 1-30, November.
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    Cited by:

    1. Bo Dong & Yang Chen & Jing Lian & Xiaohui Qu, 2022. "A Novel Compensation Circuit for Capacitive Power Transfer System to Realize Desired Constant Current and Constant Voltage Output," Energies, MDPI, vol. 15(4), pages 1-18, February.
    2. Nikolay Todorov Atanasov & Gabriela Lachezarova Atanasova & Daniel Adrian Gârdan & Iuliana Petronela Gârdan, 2023. "Experimental Assessment of Electromagnetic Fields Inside a Vehicle for Different Wireless Communication Scenarios: A New Alternative Source of Energy," Energies, MDPI, vol. 16(15), pages 1-22, July.

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