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    Area of Science:

    • Electrical Engineering
    • Biomedical Engineering
    • Materials Science

    Background:

    • Wireless power coils are crucial for safe and reliable power transfer in implantable medical devices.
    • Current coil design is complex, time-consuming, and involves many interdependent variables, hindering optimization.

    Purpose of the Study:

    • To develop an automated design method for planar square-spiral coils.
    • To achieve idealized design parameters for maximum power transfer efficiency based on specific requirements.

    Main Methods:

    • Reduced computational complexity by isolating the inductive coupling coefficient (k).
    • Developed a simplified equivalent circuit model considering skin effect, proximity effect, and parasitic capacitive coupling.
    • Implemented the method in open-source software accounting for fabrication limitations and application requirements.

    Main Results:

    • The automated method generates optimal design parameters for wireless power coils.
    • Accuracy of power transfer efficiency estimation validated using finite element method simulations.
    • Coil design process is fully automated and completed within minutes.

    Conclusions:

    • The developed automated method significantly simplifies and accelerates the design of wireless power coils for implantable medical devices.
    • This approach enhances the efficiency and reliability of wireless power transfer in medical applications.