WIRELESS CHARGING TECHNOLOGY STANDARDS: COMPARATIVE ANALYSIS, MATHEMATICAL MODELING, AND EXPERIMENTAL RESULTS

This paper presents a comparative analysis of international wireless charging (WC) standards, namely Qi (WPC) and A4WP (Rezence). Experimental results are provided regarding the technical parameters of these standards, including operating frequency, power transfer capability, transmission distance, efficiency, and positioning methods. Mathematical models describing power transfer efficiency for magnetic induction and magnetic resonance-based transmission are developed. Based on statistical data obtained from 100 experiments and graphical analyses, the advantages and disadvantages of each standard are identified. The final results indicate that the Qi standard is more effective for short-range applications (≤4 cm) and low-power charging (≤5 W), whereas the A4WP standard is better suited for longer distances (≤2 m) and simultaneous charging of multiple devices.

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