Resonator Design Automation for Wireless Power Transfer


The reduction of resonator design cost is essential to promote wireless power transfer to its practical use. The resonator design involves not only the adjustment of numerous parameters of the resonator structure including shape, turn number and pitch, but also the consideration of complex influences of an operating environment such as shape and materials of surrounding electronics. In this situation, it is therefore difficult for design engineers to avoid time-consuming trial-and-error approach based on their experiences. To overcome the problem, in this research, we are investigating resonator design automation by modeling resonator based on current distribution. First, we introduce mesh-pattern conductor into the electromagnetic simulation, and derive current distribution of each mesh that yields the minimum power loss while quantitatively evaluating the effect of the operating environments. Then, we model a resonator using approximation of magnetic dipole moment based on the derived current distribution. As a result, the parameters can finally be determined automatically. The simulation result shows that it is possible to design a resonator automatically with efficiency exceeding 90% in a given operating environment.