Modeling of wireless energy transfer system

The need for energy in today's world is ever increasing. The use of electric energy for different purposes in daily life brings with it the need for Wireless Energy Transfer (KET). In this way, interest in wireless energy transfer (WPT) based on the 19th century has increased. WPT finds application areas in mobile phone charging and electric vehicle charging, which have become popular especially in recent years, besides eliminates disadvantages such as cable clutter caused by the increasing number of electric devices. The progress made by the magnetic resonance coupling technique introduced by a group of scientists from MIT in 2007 on the WPT system has brought this work appetite into line. In this thesis, a complete model of a WPT system operating with magnetic resonance coupling technique is studied. The transformer section, which constitutes the most important part of WPT, high frequency input signal and load parts, constituting a KET system, is modelled in detail and analysed by FEM. The conductors forming the primary and secondary coils of the transformer in the design are modeled as litz cable. A ferrite core with special geometry has been used for efficient use of the current through the windings. In this way, magnetic field can be guided as desired. However, in order to reduce the leakage fluxes, leakage currents were forced to stay between the magnetic field between coils using aluminium plates on the primary and secondary sides, so the energy losses were reduced. With the help of the circuit simulation program the transformer was tested by connecting an AC load and DC load for applications such as battery charge. n the designed system, the 10 kHz input signal applied to the KET transformer with 50 mm air gap was transferred to a load with 97% efficiency.