This paper investigates the use of a metamaterial slab for magnetic field shielding in a low-frequency inductive power transfer (IPT) system. In particular, three different configurations of metamaterial slabs are considered, which are defined assuming the same slab area, total copper wire length and weight. A 3x3, 5x5 and 7x7 array made of wound spiral coils with series-connected capacitors have been developed. They are compared based on the average shielding efficiency (SE) evaluated for a field-point grid at a certain distance from the metamaterial. Since the magnetic field close to the slab is in general non-uniform, the standard deviation of the grid-point SE has been introduced. Finally, the impact of the three different metamaterial slabs on the IPT system performance has been discussed considering the overall power transfer efficiency.
Optimal Metamaterial Configuration for Magnetic Field Shielding in Wireless Power Transfer Systems / Simonazzi M.; Sandrolini L.; Barmada S.; Fontana N.. - ELETTRONICO. - (2023), pp. 1-5. (Intervento presentato al convegno 2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 tenutosi a San Diego, CA, USA nel 2023) [10.1109/WPTCE56855.2023.10216186].
Optimal Metamaterial Configuration for Magnetic Field Shielding in Wireless Power Transfer Systems
Simonazzi M.;Sandrolini L.;
2023
Abstract
This paper investigates the use of a metamaterial slab for magnetic field shielding in a low-frequency inductive power transfer (IPT) system. In particular, three different configurations of metamaterial slabs are considered, which are defined assuming the same slab area, total copper wire length and weight. A 3x3, 5x5 and 7x7 array made of wound spiral coils with series-connected capacitors have been developed. They are compared based on the average shielding efficiency (SE) evaluated for a field-point grid at a certain distance from the metamaterial. Since the magnetic field close to the slab is in general non-uniform, the standard deviation of the grid-point SE has been introduced. Finally, the impact of the three different metamaterial slabs on the IPT system performance has been discussed considering the overall power transfer efficiency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
