A low power Wireless Power Transfer prototype design and implementation

Wireless Power Transfer has become feasible recently and there have been several research projects to apply this concept in various areas, including electric vehicle battery charging. Contactless charging of batteries is a desired method as it avoids the hassle and dirt associated with cables and enables flexibility. In this paper a low power prototype to transfer about 100 W across 5 cm distance is presented. The operating frequency 19.23 kHz and the achieved efficiency is about 82%. Design steps, simulation results and test results are given and discussed.