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Adhoc mobile power connectivity using a wireless power transmission grid
Pawan Gaire1, Dieff Vital2, Md Rayhan Khan2
1Department of Electrical and Computer Engineering, Florida International University, Miami, 33174, USA. pgair001@fiu.edu.
Scientific Reports
|September 10, 2021
Summary
This study introduces a novel mesh network for wireless power transfer, enabling device charging over 5 feet away with user mobility. The system supports mobile devices, IoT, and wearables, overcoming hotspot limitations of current technologies.
Area of Science:
- Electrical Engineering
- Wireless Communication
- Power Electronics
Background:
- Current wireless charging technologies are limited to near-field, point-to-point power transfer, restricting device coverage to small hotspots.
- Existing methods necessitate close proximity between transmitters (Tx) and receivers (Rx), hindering the charging of mobile devices, IoT, and wearables.
- The fundamental limitation of hotspot-based charging restricts the practical application of wireless power in dynamic environments.
Purpose of the Study:
- To demonstrate a patented ad-hoc mesh networking method for wireless recharging over extended distances.
- To enable wireless charging of moving targets, overcoming the limitations of hotspot-based systems.
- To provide a more ergonomic and flexible wireless charging solution for various electronic devices.
Main Methods:
- Utilized a mesh network of transmitter panels for wireless power transfer up to 5 feet.
- Implemented a system compatible with Wireless Electrical Grid LANs (WiGL) for seamless integration.
- Demonstrated charging of a smartphone in the radiating near-field zone with user mobility.
- Employed 1W RF-transmitters operating in the 2.4 GHz ISM band.
- Integrated antenna arrays, rectennas, power management, and USB 2.0 interfaces.
Main Results:
- Achieved wireless recharging at over 5 feet with significant lateral movement allowance for the receiver.
- Demonstrated an average received power of 10 dBm using 1W RF-transmitters.
- Successfully charged a smartphone within the meshed network, allowing user movement.
- Maintained charging voltage between 4.2 and 5.3 V for smooth power delivery.
- Extended wireless grid coverage using multiple transmitting antennas and mechanical beam-steering.
Conclusions:
- The developed ad-hoc mesh networking method offers a disruptive solution for wireless power transfer, enabling mobile charging.
- This technology overcomes the range and mobility limitations inherent in traditional hotspot-based wireless charging systems.
- The system provides a practical and ergonomic approach to wirelessly charging devices like smartphones, IoT devices, and wearables over greater distances.
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