Analysis of Output Power Variation in Dynamic Wireless Charging System for Electric Vehicles

Abstract

The dynamic wireless charging (DWC) system charges the vehicle battery while the vehicle is in motion. It eliminates the problem of waiting time to charge the battery and helps in reducing the battery size. This work discusses the output power fluctuation in the DWC system due to a change in coupling coefficient between the magnetic coupler i.e. primary and secondary coils considering the compensation system. The work is started with an overview of the DWC system followed by an analysis of output power with respect to change in operating parameters i.e. coupling coefficient and load resistance. Furthermore, widely used compensation schemes such as series-series and Inductor(L)-Capacitor (C)-Capacitor (C)-Series (LCCS) compensations analysis are introduced to analyze the performance of the DWC system. The simulation studies are carried out through PLECS 3.7.5 and MATLAB 2020a software, and various results are presented. The comparative analysis between SS and LCCS compensations is presented considering the power transferred, output voltage, and efficiency, which confirms that SS compensation exhibits a high amount of power transferred while LCCS compensation is better in terms of power fluctuation.