Design and Performance Analysis of Four Plates Capacitive Coupler for Electric Vehicle On-Road Wireless Charging

Abstract

Electric vehicles (EVs) during parking are charged by a wireless power transfer method called stationary wireless charging, a more famous method. On-road EVs charging is also possible by the wireless power transfer method, known as dynamic charging. Most of the dynamic charging infrastructure was developed by the Inductive Power Transfer (IPT) method and applied in EVs. But the difficulty of this method is high cost and more eddy current losses due to inductive coils. Hence, to reduce the cost of the on-road charging system, a high power capacitive dynamic charging system is proposed to promote the Capacitive Power Transfer (CPT) method in Ev’s dynamic charging applications. This research article mainly focuses on capacitive aluminum plate design and comparative analysis for three different coupler arrangements. The mutual capacitance of the capacitive coupler is directly relative to the system’s output power, which is the main statement of this article. The ANSYS Maxwell simulation determines the mutual capacitance and self-capacitances for the three different arrangements to find the suitable coupler arrangement. Based on the comparison of the simulated results, which arrangement has high mutual capacitance is selected for further EVs on-road wireless charging development.