Shape and materials effects on the performance of wireless power transfer system

The most important main characteristics of wireless transmission system transformers (WPT) are coupling coefficient, self-inductance, and mutual inductance, which directly affect the efficiency of the system. Due to the unique and complex nature of transformers, a finite element method (FEM) calculation was used to determine these parameters using the Ansys Maxwell software. This paper introduces and discusses the characteristics and shapes of pads with emphasis on round pads, and the effect of ferrite quantity on the coupling modulus. The system results showed that the coupling coefficient is significantly affected by increasing the amount of ferrite and lesser by changing the shape of the ferrite. Also proved that it is affected by increasing the amount of overlapping space for the files by changing the shapes of the files to flat, concave and convex.