Witricity charger design with FEM simulation and corresponding experiment verification for recharging the deep brain stimulation

Abstract

In this paper, a wireless charger based on the novel witricity technology has been proposed for implanted deep brain stimulation (DBS). The simulation structure and the experiment model have been illustrated respectively. And the inductance, the resistance, the coupling coefficient have been compared between the simulation results and the measured results. Finally, the charger for implanted DBS power supply was proposed. The simulations have been done for coils with different copper tape arrangements to select the well match. Then a fabricated small “box” for the receiver has been designed and a head phantom has been constructed for the study of electrical energy delivery. The experiments have been carried out and the input voltage, input current, charging voltage and charging current have been measured for verification. In the end, the electric distributions have been studied to make sure its safety for human beings.