Investigation of different topologies for magnetic resonancecoupling wireless energy transfer system in electric vehicles

With wireless charging, electric vehicles (EVs) have been provided with a more free, safe and autonomous charging technology. Inductive power transfer (IPT) is the most suitable method for near-field wireless energy transfer (WET) systems, such as wireless charging of electric vehicles. In IGT systems, energy is transferred by magnetic coupling between the receiver and transmitter coils. In addition, compensation is made by connecting capacitors to the receiver and transmitter coils so that energy can be transferred efficiently. Different types of compensation topologies are formed according to the way the coils and capacitors are connected to each other. In this thesis, magnetic resonance coupling theories with serial-serial (SS) topology, series-parallel (SP) topology, parallel-series (PS) topology and parallel-parallel (PP) topology, indicator-capacitor-capacitor-series (LCC-S) topology and double-sided indicator-capacitor-capacitor (LCC-LCC) topology for EA wireless charging were examined. WET system design was made for each topology and the effects of the designed system on human health were examined. This thesis study was designed using a core with high magnetic permeability and aluminum shielding, unlike the coreless and magnetic field-directed systems used in KET systems. While designing the WET system, points to consider regarding its effects on human health and efficiency have been tried to be given. Thanks to the cores and aluminum shields placed behind the receiver and transmitter coils, a more efficient system with higher air gaps and less magnetic field scattering compared to previous studies has been designed. By using the core, the path of the magnetic flux is shortened by directing the magnetic field, thus minimizing scattering as much as possible. By reducing scattering, it is aimed to minimize the electromagnetic interference to which both the person in the vehicle and the electronic components in the electric vehicle are exposed. In this study, the parameters of the circuits were made with analytical calculations using the MATLAB program. Analytical simulation of the circuits was carried out via ANSYS Maxwell Simplorer. Additionally, the design of the coil was made using the Finite Element Method (FEM) with ANSYS Maxwell 3D. In this thesis, WET topologies that comply with the standards of the automotive engineering community at an operating frequency of 85 kHz and a power output of 3.3 kW were examined. It is aimed to reveal the most suitable topology for EVs by observing the changes of the WET system according to topologies.