Wireless power transfer circuit prototype design for electrical vehicles

Although it does not attract as much interest in the era when it was launched, Wireless Power Transmission, which is proved to be feasible with today's developing technology, is a current issue that is popular. Wireless Power Transfer is the transfer of energy from the source to the load without any mechanical connection between the source and the load. Various methods are used for this process. In this study, the Series-Series Resonance Circuit, one of the four basic topologies used in KGA technology, will be examined in detail. At the outset, a comprehensive literature study was conducted to evaluate the work carried out in this area. After the level of sufficient knowledge was reached, the operating characteristics of the circuit were determined to prepare the prototype circuit. The circuit was chosen to be 100 W, operating frequency 20 kHz and 5 cm air gap between windings. Theoretical work was combined with Matlab program to determine the values of the circuit elements used in the circuit. A circuit model was created in the Orcad program with the values found. When the simulation results were satisfactory, circuit board design was done in Altium program and prototype circuit setup was done. In this study, the circuit prototype with 5 cm air gap, 19.23 kHz operating frequency, 20 V source voltage and about 100 W power was operated with about 80% efficiency. The necessary test and measurements were made on the prototype circuit and the results were examined. Keywords: Wireless power transfer, series series resonance circuit