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    This study introduces a new wireless power system for moving receivers, significantly improving power delivery even with significant tilt misalignment. This innovation aids research on moving subjects by ensuring consistent power supply.

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    Area of Science:

    • Electrical Engineering
    • Biomedical Engineering
    • Robotics

    Background:

    • Wireless power transfer (WPT) is crucial for mobile devices and implants.
    • Misalignment, especially tilt, severely degrades WPT efficiency for moving receivers.
    • Existing WPT systems struggle with dynamic environments and receiver orientation changes.

    Purpose of the Study:

    • To develop a novel WPT scheme robust to receiver tilt and movement.
    • To enable reliable power delivery for applications like animal behavior studies in cognitive research.
    • To enhance WPT system performance using advanced signal processing and array design.

    Main Methods:

    • Utilized phase-shifted excitation signals from transmitter arrays.
    • Implemented current feedback and Support Vector Machine (SVM) classification for receiver positioning.
    • Employed an overlapped transmitter array for improved rotation tolerance and field uniformity.
    • Incorporated a phase shift mechanism to boost power during receiver tilt.

    Main Results:

    • Achieved 296 mW power delivery at 90° angular misalignment.
    • Demonstrated a significant improvement over conventional systems (1.67 µW at 90° misalignment).
    • Validated performance through simulations and a fabricated prototype.

    Conclusions:

    • The proposed WPT scheme effectively compensates for receiver tilt and misalignment.
    • The system provides a reliable power solution for moving loads in dynamic environments.
    • This technology has strong potential for applications in cognitive research and other mobile WPT scenarios.