Modelling, simulation and hardware analysis of misalignment and compensation topologies of wireless power transfer for electric vehicle charging application

Abstract

Electric vehicles (EVs) are one of the most effective means for reducing pollution and promoting sustainable transportation in developing nations. Researchers have been paying close attention to the rapid advancement of Wireless power transfer (WPT) technology because it offers a workable solution to the challenges preventing the development of EVs. EV charging uses WPT technology that transmits electricity from the source to the load (battery) using mutual induction and does not require cables or other physical connections. Power pads, misalignment, and compensation topology are technical obstacles to EV wireless charging. In this manuscript, mathematical calculations, simulations, and experimental implementation have been done for the wireless charging of EVs. Ansys Maxwell®3D and MATLAB®/Simulink software are used to simulate various parts of the system. Finite Element Analysis (FEA) using Ansys Maxwell is used to design an existing rectangular power pad. Ansys Maxwell calculates multiple parameters such as self-inductance, mutual inductance, coupling coefficient, and magnetic flux of the transmitting and receiving coils at different misalignment positions. MATLAB®/Simulink has been used to develop a series-series compensation WPT model through which the output power and efficiency of the rectangular power pad at different misalignment positions are estimated. The experimental setup uses a DC power supply, high-frequency (HF) inverter, driver circuits, compensation circuit, MSO, power pad setup, rectifier, and resistive load to verify the simulation results.