Wireless Power Transfer Using Capacitive Coupling for High Power Applications

This paper presents a detailed analysis and design of wireless power transfer (WPT) using capacitive coupling technique. The capacitive coupling technique for WPT has been modelled and analyzed in this research using ANSYS Maxwell software. Electrostatic and transient analysis have been performed on these capacitive plates and required parameters such as capacitance, electric field intensity, voltage magnitude and electric field concentration on the plates are obtained for performing simulation in ANSYS Simplorer. The circuit of WPT comprising of high frequency inverter based upon silicon-carbide (SiC) technology and driven by HCPL gate driver is then simulated in ANSYS Simplorer. The parametric values such as distance, load and inductance are varied for obtaining the maximum power point, at a specific distance and resonant frequency. The proposed scheme of WPT through capacitive coupling finds its utilization in high power applications, such as electric vehicle (EV) charging. The hardware and simulation results report power transfer of 100W having efficiency greater than 75% at a distance of 10cm.