Abstract
This paper proposes a magnetic dipole structure Resonator for the magnetic coupled resonance wireless power transmission (WPT). The various characteristics are investigated by using simulations. To investigate the advantage of the proposed structure coil, a same geometric size traditional single-layer spiral coil is used for the power transfer characteristics Comparison. Due to the proposed structure, if the magnetic dipole resonator needs to be resonated at the same frequency with the traditional spiral coil, the larger number of turns is needed. This causes the resistance of loss to dramatically increase, thus decreasing the power transfer efficiency. To solve this problem, the tightly coupled parallel-connected coil structure was used. Depending on the characteristics of the tightly coupled parallel-connected coil structure the proposed magnetic dipole resonator can offer significantly reduced resistance with very little self-inductance loss. Simulation results show that compare to the same resonance frequency traditional single-layer spiral coil, a magnetic dipole resonator contributed by the tightly coupled parallel-connected coil structure can increase the Q factor by approximately 54.3%. Moreover, the simulation evaluation results confirmed that the proposed resonator can also dramatically improves the system power transfer flexibility performance.
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