Evaluation of the Design Parameters for Wireless Power Transfer System Applied in Electrical Vehicles

Wireless charging of electrical vehicles is essential as a preliminary stage for the dynamic charging of moving vehicles. It gives the vehicles the possibility to increase their driving range and decrease their battery size, which are the main problems of electrical vehicles. In this paper, the design prototype parameters of a wireless power transfer (WPT) system dependent on the inductive coupling power transfer mechanism are evaluated. The prototype of the wireless charging system has been designed using two circular coils arrangement. Using the COMSOL program, the physical implementation of the wireless transfer power system is studied. To efficiently correlate the output and input powers, the frequency and number of turns of the coils are varied and the results are evaluated to attain their optimum values that produce the highest efficiency. Based on the highest efficiency, the WPT system parameters have been selected. Finally, the developed prototype was experimentally implemented to verify the performance, though the desired frequency could not be acquired.