Dynamic Wireless Power Transfer for Electric Vehicle Charging

In this project, dynamic wireless power transfer is employed to charge a 25 kW-electric bus. To this aim, a comprehensive algorithm is proposed for segmented-coil systems which performs four main actions: (i) energizes primary coils (transmitter) successively based on the position of vehicle, (ii) controls the primary coil current at the reference value under no-load and loaded conditions, (iii) compensates lateral misalignments of the vehicle with degrees up to 43% completely, which result in 30% increase in energy efficiency, and (iv) controls the amount of transferred power at the primary side power ratings. This algorithm takes advantage of a dual-loop power and current controller. Using generalized state space averaging the system under study is modelled and through simulation and experimental tests the model has been verified. Then the appropriate controller has been designed and implemented and then its operation was evaluated via Matlab/Simulink simulations and experimental tests. A two-coil primary side system is used to demonstrate the full operation and features of the controlling system. Efficiency measurements of the system also show that the system can have energy efficiency up to 86% while having no lateral misalignment