In this paper, the authors are to develop a system of wireless power transfer in 3D space. This concept based on low frequency to high frequency conversion. High frequency power is transmit between air-core and inductor. This paper presents an experiment for wireless energy transfer by using the Inductive resonant coupling (also known as resonant energy transfer) phenomenon. The basic principles will be presented about this physical phenomenon, the experiment design, and the results obtained for the measurements performed on the system.