Hybrid Circular-Polygon Coil Arrays for Robust Wireless Power Transfer in Dynamic Misalignment

This work proposes a strongly coupled magnetic resonance-based wireless power transfer (WPT) link incorporating coil arrays for the purpose of increasing transfer efficiency and mitigating the impact of lateral misalignment. The proposed WPT link, operating at 13.56 MHz, achieves a simulated transmission efficiency of 97.7% when the transmitter and receiver are separated by 30 mm. The proposed link demonstrates significant tolerance to lateral misalignments, maintaining a transfer efficiency above 80% for displacements up to ±40 mm along either the X or Y axis. Moreover, a transfer efficiency exceeding 50% is sustained with lateral misalignments up to ±60 mm along both axes. Notably, this performance is further evidenced by the maintenance of transfer efficiency above 50% under simultaneous lateral misalignments of 80 mm along both the X and Y axes.