Design of a Resonant Point-Multipoint Wireless Power Transmission System

Úrsula do Carmo Resende, Thiago Henrique Gonçalves Mello


With the exponential growth of IoT (Internet of Things), Industry 4.0, and electrical vehicles, there is a growing need for flexible energy sources. Wireless energy transfer is becoming increasingly important in this context, as it enables physical devices to be more flexible and allows for the simultaneous powering of multiple loads. This study presents a wireless energy transfer system that uses solenoid coils in inductive resonant mode. The system is configured in a point multipoint setup, with a circular transmitter coil and two identical circular receiver coils placed inside the transmitter. We use mathematical modeling to develop circuit theory models and identify the most efficient topology for the system. In addition, we propose a simple and cost-effective self-oscillating electronic converter design with two switches for system supply. Our numerical and experimental results demonstrate that the proposed system is viable and functional, achieving a power output of 1.7 W and efficiency of 27%.


Point-Multipoint; Resonance; Self-Oscillating Inverter; Wireless Power Transmission

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