Skip to main content
APEC 2026 Main banner

    Wireless Charging

    T16.3 - Optimization Design of Dual-Layer Coil for Wireless Charging Under Wide Coupling Coefficient Variations

    Wednesday, March 25, 2026
    9:10 AM - 9:30 AM CT
    Location: 217D
    Traditional coil design approaches of the wireless power transfer (WPT) system typically overlook the influence of coil parameters on key system-level performance, potentially jeopardizing system safety. To address these crucial challenges, the resonant parameter design method based on multiple boundary constraints (MBCs) is improved by incorporating an evaluation of the coupling coefficient range under significant variations in coil distance or misalignment to better accommodate the coil design, which significantly simplifies the subsequent feasibility verification. Moreover, to overcome the narrow feasible shaded region under wide coupling variations, a dual-layer winding structure and its optimization method are proposed. This approach precisely tunes coil self-inductances, enabling the design to satisfy MBCs while maintaining desirable coupling performance and lower cost. Experimental results show the WPT system with well-designed dual-layer coils not only exhibits the excellent steady-state and dynamic performance, but also achieves high transfer efficiency.