Performance Enhancement for Inductive Coupling Wireless Power Transfer

This study focuses on enhancing WPT efficiency by optimizing the physical parameters of the system. The overall efficiency in wireless power transfer is dominated by the transmitter and receiver coil parameters. This study investigates the effect of coil parameters on system performance. The coupling coefficient between the transmitter and the receiver coils is the main characteristic of the inductive coupling link that defines power transfer efficiency between both coils. System physical parameters determine the coupling coefficient such as distance between coils, coils inner and outer diameter, wire thickness and inductance. These parameters are connected to each other by non-linear relationships and there is no closed-form that relates these parameters. To enhance power transfer efficiency, tradeoffs should be done among the ranges of those parameters. Physical coils parameters are investigated using the finite element analysis method with a parametric 3D-model. The goal is to define the best conditions and ranges for the design parameters and deduce guidelines for designers to enhance power transfer efficiency.