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To widen the range of a magnetically coupled wireless power transfer system, we propose a novel reconfigurable resonant coil. This device consists of a series of subcoils that use switches to control the number of turned-on subcoils. With this design, both the coupling coefficient between coils and the quality factor of the proposed coil can be dynamically tuned when the distance between the transmit...
Optimization of coil sizes for wireless power transfer applications has a significant impact on the range and efficiency of the wireless power system. Often it is difficult to accurately analyze how a set of coils will perform before they are constructed due to the complexity of approximating the parasitic components and coupling coefficients associated with the coils. Also, for certain wireless power...
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