Efficiency of the Wireless Power Transfer System with Planar Coils in the Periodic and Aperiodic Systems

This article presents the results of proposed numerical and analytical analysis Wireless Power Transfer System (WPT). The system consists a transmitting surface receiving surface, where each them is composed planar spiral coils. Two WPT systems were analysed (periodic aperiodic) considering two types coils (circular square). In aperiodic system, adjacent wound in opposite direction. influence type coils, winding direction, number turns, distance between on efficiency was compared. periodic models, higher obtained with circular rather than square both methods consistent, which confirmed correctness adopted assumptions. for smaller radius coil, coil models models. On other hand, larger comparable regardless type. When comparing aperiodic), show values (the difference even 57%). can be used simultaneous charging many sensors (located in, e.g., walls, floors).