Modeling and Analysis of Coupling Structure Loss of Bidirectional WPT System Based on Finite Element Simulation

In magnetic coupled wireless power transfer (WPT) systems, high-frequency currents induce high-frequency alternating magnetic fields within the coupling structure, leading to associated losses. A precise loss model is essential for guiding the design of the coupling structure to mitigate these losses. This study utilizes finite element simulation software to model and analyze the losses in the coupling structure of a bidirectional WPT system. Initially, a bidirectional wireless power transfer model and a coupling structure loss model based on double LCC are established. Subsequently, the losses in the coupling structure are computed using finite element simulation software and compared against the measured efficiency of the actual system, demonstrating alignment between simulated and experimental outcomes.