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This paper formulates the maximum RF-to-RF efficiency of inductive power transfer system with two transmitters and two receivers under the assumption that cross-coupling exists between transmitters and between receivers. Maximum efficiency is derived by jointly optimizing the input and output currents. We express the maximum efficiency by a system kQ-product, which is determined by system Z-parameters...
This paper investigates reactance compensation method to eliminate the impact of cross-coupling in single frequency inductive power transfer (IPT) system with arbitrary number of receivers. Receiver-side resonance loses its optimality in multiple receiver scenarios under the existence of significant cross-coupling among receivers. Therefore, the resonant capacitances are added with compensatory reactances,...
This paper investigates maximum achievable efficiency of inductive power transfer (IPT) system with arbitrary number of receivers. We derive the formulas of optimal loads and maximum efficiency based on N-port network model. Via analysis and computer simulations, we show that the cross-coupling among receivers does not affect system efficiency if load resistances and reactances are jointly optimized...
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