A simulation study on four different compensation topologies in EV wireless charging

Wireless power transfer is a rapidly developing technology utilized to charge electric devices via an air gap. The wide interest towards the development and use of this new charging technique is due to its simplicity, freedom from annoying charging cables, higher efficiency, and smaller charging time. Along with its technical advancements, wireless power transfer technology contributes to the significant reduction of pollutants and CO2 emissions into the atmosphere by the conventional vehicles. However, the implementation of wireless charging for electrical vehicles still present challenges in terms of power transfer efficiency, energy transfer range, utilization of heavy batteries with low energy density and time spent on vehicle charging. One of the ways to address these existing limitations is the development of inmotion (dynamic) wireless power transfer technology. With the incorporation of dynamic wireless charging, there is no need for batteries and the time for charging will sufficiently decrease. This article aims to give a comprehensive explanation of wireless power transfer fundamentals. In particular, different tuning topologies for less inductance leakage are discussed. The output characteristics of each topology are simulated in SIMULINK/Matlab software.