Design and Analysis of a 200 kW Dynamic Wireless Charging System for Electric Vehicles

Dynamic wireless charging of electric vehicles can significantly alleviate or eliminate range anxiety while reducing the required on-board battery capacity. To achieve an electric vehicle charging balance with minimal infrastructure costs, power transfer levels around 200 kW are required. In this paper, a system architecture with a modularized power electronics and optimized power transfer couplers was adopted to enable efficient power transfer. A DC/DC converter was used for secondary-side charging control of the battery. The system performance was validated in an experimental setup at 120 kW with 91.31% efficiency from the DC input on the primary side to the vehicle battery.

I. Introduction

Dynamic wireless charging of electric vehicles (EVs) can significantly alleviate or eliminate range anxiety while reducing the required on-board battery capacity [1]–[3]. Current state-of-the-art light-duty dynamic wireless EV charging prototypes are limited in power level to approximately 20 kW. This limitation requires a significant portion of the roadway to be electrified to achieve a charge-balanced mode of operation. For light-duty vehicles to achieve a charge-balancing mode of operation on primary roadways with minimal infrastructure costs, power transfer levels in the range of 200 kW are required [4]. This paper demonstrates the analysis and design considerations of a dynamic wireless power transfer (DWPT) system architecture to efficiently transfer power, and the experimental validation results are presented.