Proposal of Coil Embedment Method by Pouring Resin Materials for Dynamic Wireless Power Transfer

The transmitter coils are embedded in the road in dynamic wireless power transfer. Previous studies have reported that under actual conditions, the characteristics of the coils deteriorate significantly due to the influence of the surrounding environment, such as pavement material. In addition, it has been reported that the strength of the pavement is reduced because the coils become foreign objects on the road. This study proposes a embedment method that reduces the deterioration of coil characteristics by pouring resin materials. As a result of the road embedment experiment, the Methyl Methacrylate (MMA) resin pouring method succeeded in reducing the deterioration of coil resistance by about 43% compared to the conventional method. In the evaluation of power transmission by Vector network analyzer (VNA), it was shown that more than 20 kW of power could be obtained with 94% efficiency in 600 V equivalent at 200 mm transmission distance. The results of the pavement strength test showed that the coil without the resin coil holder proposed in this study can achieve both coil performance and pavement strength when combined with the construction using poured MMA resin.