Scientists at Stanford University in the US have developed a device that can wirelessly charge a moving object at close range.
The technology could one day be used to charge electric cars on the highway, or medical implants and cellphones as you walk nearby.
“In addition to advancing the wireless charging of vehicles and personal devices like cellphones, our new technology may untether robotics in manufacturing, which also are on the move,” said Professor Shanhui Fan.
According to the study, published in the journal Nature, wireless charging would address a major drawback of plug-in electric cars their limited driving range. A charge-as-you-drive system would overcome these limitations.
“We can rethink how to deliver electricity not only to our cars but to smaller devices on or in our bodies. For anything that could benefit from dynamic, wireless charging, this is potentially very important,” Fan said.
The team transmitted electricity wirelessly to a moving LED light bulb but the demonstration only involved a one milliwatt charge, far less than what electric cars require.
The scientists are now working on greatly increasing the amount of electricity that can be transferred, and tweaking the system to extend the transfer distance and improve efficiency.
According to the research, the transfer efficiency can be further enhanced if both coils are tuned to the same magnetic resonance frequency and are positioned at the correct angle, but scientists found that was a complex process.
Please like, share and tweet this article.
Pass it on: New Scientist