Geometric approach for coupling enhancement of magnetically coupled coils

Area of Science:

• Electrical Engineering
• Electromagnetics
• Physics

Background:

• Magnetic coupling is crucial for inductive power transfer and wireless charging.
• Optimizing the coupling coefficient is essential for efficient energy transfer between coils.
• Current coil designs often concentrate windings at the circumference, potentially limiting performance.

Purpose of the Study:

• To present a novel geometric approach for enhancing the coupling coefficient of magnetically coupled coils.
• To investigate the impact of coil turn distribution on magnetic coupling.
• To provide a theoretical and experimental validation of the proposed method.

Main Methods:

• Modeling magnetically coupled coils as collections of concentric circular loops.
• Developing a geometric analysis to determine the coupling coefficient based on turn distribution.
• Conducting experimental measurements to validate theoretical predictions.

Main Results:

• Demonstrated that distributing coil turns across the diameter, rather than concentrating them at the circumference, significantly enhances the coupling coefficient.
• Theoretical analysis showed a considerable increase in coupling coefficient with distributed turns.
• Experimental results closely matched the theoretical predictions.

Conclusions:

• The geometric distribution of coil turns is a critical factor in maximizing magnetic coupling.
• The proposed method offers a practical approach to enhance the performance of magnetically coupled systems.
• This research provides valuable insights for designing more efficient inductive coupling devices.