Wireless charging will soon become a reality for electric vehicles
Currently, electric vehicles are inferior to the usual for us cars its small range and the time required for charging, but now, it seems, scientists have found a way to fix these problems.
Achievement of scholarsIn an article published in the journal Nature, talking about the development of researchers from Stanford University. They found a way to transfer the electric charges without wires to a nearby moving object. The team was able to transmit 1 milliwatt of charge, which is 10 million times less than necessary for operation of the electric vehicle. This is a small but promising step in the development of wireless chargers.
"We need to significantly increase the amount of electricity transmitted to charge electric cars, but we don't need to increase the distance that you can drive cars on this charge, — said Sanui Fan, Professor of electrical engineering and lead author of the study. — In addition to promoting wireless charging of vehicles and personal devices such as mobile phones, the new technology can help to "decouple" the robotics of cables, without which she cannot work."
This system is intended as a precursor to charging mode while driving car. Theoretically, this means that you will not need to stop to charge your car. Currently, drivers of electric cars need a few hours to fully charge the battery.
Previous experimentTechnology is based on an existing experiment on the use of wireless charging, which was held at the Massachusetts Institute of technology in 2007. The original device worked on magnetic resonances, and an electrical charge was passed through an oscillating magnetic field. Such a device can only work if its charging circuit will be aligned and adjusted manually when the car is moving.
If motorists had to debug the circuit, riding on this electric car would be unbearable. Therefore, researchers from Stanford added commercial available voltage amplifier and a feedback resistor. This setting allows the system to automatically adapt to changes without any human intervention.
"adding an amplifier allows for very efficient to transmit power through most of the range, despite changes in the orientation of the receive coil, — added the study's lead author Led Asavapisit. — This eliminates the need for automatic and continuous tuning to any aspect of the scheme".
Sanui Fan also said: "We can explore how to deliver electricity not only for electric vehicle charging, but also smaller devices on or in our bodies. All that we can capitalize on dynamic wireless charging, potentially very important."