Power Pulsation Reduction Analysis in Dynamic Wireless Charging of Electric Vehicles

Abstract

It is possible to considerably decrease the fossil fuel consumption and reduce the pollution created by the conventional vehicles by employing Electric Vehicles (EVs) and wireless charging techniques. The EV wireless charging systems can be divided into two categories based on the vehicle’s position during charging, namely, Stationary Wireless Charging (SWC) and Dynamic Wireless Charging (DWC). DWC has more advantages as compared to SWC, in terms of charging time and reducing battery’s size. Despite of the fact that it provides more benefits, there are various issues related to the passenger safety and the system’s efficiency due to the fact that the vehicle is charged in motion. In addition, the issue of pulsations at the receiving coil mounted on the vehicle presents a significant challenge. Hence, this thesis specifically focuses on, discusses and analyzes the effect of distance between the adjacent transmitting coils, shape of the coils and distance between the transmitting as well as the receiving coils on the DWC system’s output. In this thesis, mathematical modeling of a multi-channel DWC system is conducted, simulation and experimental studies for different distances between the transmitting coils are performed, and the results are discussed in detail. A possible solution to reduce the pulsations is provided and a future work on the subject of DWC systems for EVs is discussed. Moreover, the issue related to the electromagnetic safety of the system is considered and studied by means of a simulating the magnetic flux density around the coils.