Active Shielding Design and Optimization of a Wireless Power Transfer (WPT) System for Automotive

Silvano Cruciani, Tommaso Campi, Francesca Maradei and Mauro Feliziani
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Silvano Cruciani: Department of Electrical Engineering and Automation, Sapienza University of Rome, 00185 Rome, Italy
Tommaso Campi: Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Francesca Maradei: Department of Electrical Engineering and Automation, Sapienza University of Rome, 00185 Rome, Italy
Mauro Feliziani: Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy

Energies, 2020, vol. 13, issue 21, 1-12

Abstract: This study deals with the optimization of a shielding structure composed by multiple active coils for mitigating the magnetic field in an automotive wireless power transfer (WPT) system at 85 kHz. Each active coil is independently powered and the most suitable excitation is obtained by an optimization procedure based on the Gradient Descent algorithm. The proposed procedure is described and applied to shield the magnetic field beside an electric vehicle (EV) equipped with SAE standard coils, during wireless charging. The obtained results show that the magnetic field in the most critical area is significantly reduced (i.e., approximately halved) with a very limited influence on the electrical performances (i.e., WPT efficiency decreases by less than 1 percentage point compared to the case without active shielding).

Keywords: active coil; automotive; electric vehicle (EV); electromagnetic compatibility; magnetic field; near field; shielding; wireless power transfer (WPT) (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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