Enhancing Magnetic Resonance Coupling for Improved Efficiency in Wireless Solar-Powered Phone Charging

Abstract

The focus of this study is on wireless power transfer technologies utilizing Wi-Fi. It examines how electronic device batteries can be charged wirelessly using solar energy. Solar panels convert sunlight into electrical energy, transmitted wirelessly via a transmitter circuit and received through a receiver circuit, based on Faraday's law of induction. This study explicitly explores magnetic resonance coupling, which is more effective and efficient than magnetic inductive coupling. The system includes a transmitter and a receiver coil, with both coils tuned to the same resonance frequency to enhance energy transfer. Despite these advancements, some energy loss occurs during wireless transmission, resulting in an efficiency of approximately 11%.

Nevertheless, this technology holds promise as a future charging solution in various applications, including medical devices, electric vehicles, drones, and smartphones, eliminating the need for cables. Our approach integrates a solar panel that powers a transmitter circuit by converting sunlight into electricity. The power is wirelessly transferred to a receiver circuit using magnetic resonance coupling. Optimizing resonance frequencies for both the transmitter and receiver coils is critical to our design. We achieve frequency alignment through precise LC (inductor-capacitor) circuit adjustments, which significantly enhance energy transfer efficiency.