Coil Gap Variation Effects on Driving Based on Coil Mounting Position in Dynamic Wireless Power Transfer System

Abstract

Dynamic wireless power transfer (DWPT) systems have garnered considerable interest for promoting the sale of battery electric vehicles (BEVs). In DWPT, a receiving coil is attached to the vehicle and power is transmitted during driving. Therefore, depending on the coil mounting location, the gap between coils may vary according to acceleration/deceleration and unevenness of the road surface during driving, which may affect power transmission. In this study, we quantify the amount of variation in the gap between coils depending on the coil mounting location by taking into account the suspension variation and tire deformation due to load changes during actual driving. The coil gap variation effects on power transfer due to the coil mounting location is thus investigated experimentally.