Journal article

Optimal Tuning of Inductive Wireless Power Links: Limits of Performance

ME Halpern, DC Ng

IEEE Transactions on Circuits and Systems Part 1: Regular Papers | IEEE | Published : 2015


This paper shows how to choose compensation capacitors for optimal performance in two-coil fixed-frequency inductive wireless power links having a series-parallel (SP) configuration. First, for the SP circuit with given coils, coupling and sinusoidal input voltage, it is shown how to calculate nonnegative valued capacitors to maximize power delivered to a given resistive load. Exact conditions for such a compensated system to deliver the maximum power obtainable from a circuit with the same resistances and an ideal transformer with optimal turns ratio are presented. The second main contribution is a method for selecting compensation capacitors to maximize a weighted sum of efficiency and del..

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