|Wireless power transmission via magnetic coupling to an electrodynamic receiver
|Year of Publication
|Cheng, S., and D. P. Arnold
|10th Int. Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Apps. (PowerMEMS 2010)
This paper demonstrates a wireless power transmission system that exploits magnetic coupling and electromechanical resonance for safe, spatially distributed, low-frequency power delivery to sensors, consumer electronics, or implantable medical devices. The system uses one or more power transmitting coils and an electrodynamic receiver. An alternating magnetic field from the transmit coil(s) excites a magnet in the receiver into mechanical resonance. The vibrating magnet then functions like an energy harvester to induce voltage/current on an internal coil. In a preliminary demonstration, with only 1 A of current at ~100 Hz, an estimated 5 mW of power is delivered to a compact receiver (1 cm3 in size) over a distance of 6 cm.