Homes are increasingly being filled with more and more smart devices and advanced technology products that need energywhich causes our walls and floors to be filled with cables and more cables many times with external power sources.
Although it is true that in recent years wireless energy recharging systems have been appearing for some equipment such as mobile phones, the reality is that they still have some distance limitations very restrictive, since you have to put the device right on top of the charging base.
More efficient remote wireless charging
The invention that we bring today works in a different way, since it allows, according to its creators, recharge batteries at distances of tens of centimeters maintaining a good efficiency, which would eliminate the need to have recharging bases for the equipment.
This is a research carried out by Aalto University that consists of two loop-shaped antennas with a radius of 3.6 cm and that can transmit charging energy between them. maintaining high efficiency.
According to the first experiments, adjusting the currents in these antennas with opposite phases and the same amplitude It is possible, as if it were a noise cancellation system, to neutralize the radiation resistance between them, thus improving efficiency.
In this way they ensure that with a separation of 18 cm (distance equivalent to 5 times the dimensions of the antenna) between the antennas the efficiency of energy transmission exceeded 80%. According to Nam Ha-Van, lead author of the study:
We were looking for a way to balance power transmission with the inevitable radiation loss that occurs at greater distances. We found that if the currents in the antennas have equal amplitudes but opposite phases, it is possible to neutralize this loss, thus increasing efficiency.
According to the research team, this new technique is not only very promising, but can also be applied to optimize any wireless power transmission system. Will this be the breakthrough that wireless recharging needs to be a real alternative and retire to cables at home? Well, we don’t know, but the experiment is promising.
Via | ecoinventions
More information | Aalto University