Abstract
ABSTRACTThis article presents an optimum design method of a wireless power transfer (WPT) relay system. Magnetic couplings between nonadjacent resonators cause a frequency shifting of maximum efficiency in a WPT relay system. Thus, the efficiency at the system frequency of f0 is relatively lower than that at a shifted frequency of f′. To use the system at f0 effectively, the values of capacitors of resonators are optimized. The appropriate values of capacitors are found from the genetic algorithm by analytic calculation. This optimum design method is verified by both simulation and measurement. Additionally, the currents and dissipated powers on the resonators are investigated to explain the mechanism of optimization. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1658–1661, 2014
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