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Accurate Computation of Mutual Inductance of Non Coaxial Pancake Coils

Author

Listed:
  • Mauro Parise

    (University Campus Bio-Medico of Rome, 00128 Rome, Italy)

  • Fabrizio Loreto

    (Department of Industrial and Information Engineering and Economy, University of L’Aquila, 67100 L’Aquila, Italy)

  • Daniele Romano

    (Department of Industrial and Information Engineering and Economy, University of L’Aquila, 67100 L’Aquila, Italy)

  • Giulio Antonini

    (Department of Industrial and Information Engineering and Economy, University of L’Aquila, 67100 L’Aquila, Italy)

  • Jonas Ekman

    (Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, A2311 Luleå, Sweden)

Abstract

The computation of self and mutual inductances of coils is a classic problem of electrical engineering. The accurate modeling of coupled coils has received renewed interest with the spread of wireless power transfer systems. This problem has been quite well addressed for coplanar or perfectly coaxial coils but it is known that the misalignment conditions easily lead to a sharp decrease in the efficiency. Hence, it is crucial to take misalignment into account in order to properly design the overall wireless power transfer system. This work presents a study to compute analytically the mutual inductance of non-coaxial pancake coils with parallel axes. The accuracy of the proposed methodology is tested by comparison with the numerical results obtained using the tool Fast-Henry. Then, a wireless power transfer system, comprising a full bridge inverter is considered, showing the impact of the misalignment on the coupling between two pancake coils and, thus, between the source and the load.

Suggested Citation

  • Mauro Parise & Fabrizio Loreto & Daniele Romano & Giulio Antonini & Jonas Ekman, 2021. "Accurate Computation of Mutual Inductance of Non Coaxial Pancake Coils," Energies, MDPI, vol. 14(16), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:4907-:d:612374
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    References listed on IDEAS

    as
    1. Shuo Liu & Jianhui Su & Jidong Lai, 2019. "Accurate Expressions of Mutual Inductance and Their Calculation of Archimedean Spiral Coils," Energies, MDPI, vol. 12(10), pages 1-14, May.
    2. Adam Steckiewicz & Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2020. "Numerical and Circuit Modeling of the Low-Power Periodic WPT Systems," Energies, MDPI, vol. 13(10), pages 1-17, May.
    3. Vincenzo Cirimele & Riccardo Torchio & Antonio Virgillito & Fabio Freschi & Piergiorgio Alotto, 2019. "Challenges in the Electromagnetic Modeling of Road Embedded Wireless Power Transfer," Energies, MDPI, vol. 12(14), pages 1-22, July.
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