UCLA researchers in the Department of Electrical Engineering have developed a novel design for a wireless power transfer system. This new design is optimized to function stably over a greater and variable distance than current systems and to function with a higher efficiency.
In contrast to current systems of wireless power transfer, this technology provides stable power delivery over a varying distance up to 2.5 cm. By using a self-tuning oscillator as the driver, the transmitter tunes its frequency in concert with the receiver and maintains stable energy transfer, with fluctuations of only 4%.
This system also corrects for power loss during transfer and is designed to maximize receiver efficiency. Particularly for smaller devices, the heat associated with energy loss in the receiver is undesirable. The technology described here maximizes the receiver efficiency (80-90%) and allows the transmitter to dissipate the (still fairly low) energy loss.
A prototype of the proposed design was constructed and tested to determine efficiency rates, measure the range of efficacy, and to monitor the stability of power delivery. In all measurements taken, the prototype performs as designed.
|United States Of America||Issued Patent||10,547,200||01/28/2020||2016-390|
Near-field, wireless power transfer, wireless charging, inductive charging, wireless energy transfer, plugless power, consumer electronics, electric vehicles, high-efficiency energy transfer, mobile