Positional characteristics of capacitive power transfer as a resonance coupling system

Capacitive power transfer has many important merits including less heating, less effect from metal barriers and more material options. But its positional characteristics had not been studied quantitatively and generically enough. This study analyzed the capacitive power transfer with the same manner as magnetic resonance. The analysis on the equivalent circuit model showed the positional characteristics of the efficiency are determined by coupling coefficient as in magnetic resonance. The coupling coefficient simulation showed the effective range is as long as that of magnetic resonance along the distance and is longer along the one of misalignment directions.