A Proposal for Reducing Standby Losses and Detecting Vehicles by Series-Splitting Double-LCC Transmission Coils Using N-Legged Converter for Dynamic Wireless Power Transfer

Abstract

In recent years, various studies have been conducted to popularize electric vehicles in order to achieve carbon neutrality. Toward this end, the method of dynamic wireless power Transfer (DWPT) for these vehicle is attracting considerable attention as it can shorten the charging time and contribute to battery downsizing. However, since a vehicle passes by in a short period of time, the duration for which the vehicle is not on the transmission coil is long, and the standby loss on the transmission side causes a loss of efficiency. This study proposes a new vehicle detection method using the voltage from divider circuit of the transmission coils in the DWPT system. The proposed method is expected to reduce standby losses due to copper losses in the transmission coils and the inverter losses. The effectiveness of the proposed system has been verified through experiments.