Comparison of the Efficiency and Load Power in Periodic Wireless Power Transfer Systems with Circular and Square Planar Coils

In the article, a wireless charging system with use of periodically arranged planar coils is presented. The efficiency two power transfer (WPT) systems different types inductors, i.e., circular and square compared, models are proposed: analytical numerical. With appropriate selection load resistance, it possible to obtain either maximum or receiver. Therefore, analyzed at optimum modes operation: highest transmitted load. analysis many variants proposed solution was performed. aim check influence geometry their type (circular square) on system. Changes in number turns, distance between (transmit receive) as well frequency also taken into account. results obtained from numerical were consistent; thus, correctness adopted circuit model (with periodic boundary conditions) confirmed. presented approach allow for quick estimate electrical parameters transmission can be used charge receivers, e.g., cars parking several electronic devices. Based results, found that provide lower than compared entire range regardless variants. discussion multivariate better understanding coil effectiveness. They valuable knowledge when designing this