Accurate Computation of Mutual Inductance of Non Coaxial Pancake Coils

Mauro Parise, Fabrizio Loreto, Daniele Romano, Giulio Antonini and Jonas Ekman
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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

Energies, 2021, vol. 14, issue 16, 1-11

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.

Keywords: pancake coils; mutual inductance; wireless power transfer; planar coils (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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