Wireless charging will soon become a reality for electric vehicles

Currently, electric cars are inferior to the usual for us cars with their small assortment, as well as the time necessary for their charging, but now it seems that scientists have found a way to eliminate these problems.

Achievement of scientists

In an article published in the journal Nature, it is about the development of researchers from Stanford University. They found a way to transfer electric charges without wires to an adjacent moving object. The team was able to transfer 1 milliwatt of charge, which is 10 million times less than what it takes to operate an electric vehicle. This, though, is a small but promising step in the development of wireless chargers.

"We still need to significantly increase the amount of electricity that is transferred to charge electric cars, but we no longer need to increase the distance that cars can travel on this charge," said Shanui Fan, an electrical engineering professor and lead author of the study. "In addition to promoting wireless Charging vehicles and personal devices, such as mobile phones, the new technology can help "untie" robotics from electrical cables, without which it can not work now. " This system is conceived as the predecessor for the charging mode while driving auto. Theoretically this means that you will not need to stop to charge your car. Now, electric car drivers need a few hours to fully charge the batteries.

Previous experiment

The technology is based on an already existing experiment on the use of wireless charging, which was conducted by the Massachusetts Institute of Technology in 2007. The original device operated on magnetic resonances, and the electric charge was transmitted with an oscillating magnetic field. Such a device can only work if its charging circuit is leveled and adjusted manually when the car moves. If the motorists had to constantly debug the scheme, driving on such an electric car would become unbearable. Therefore, researchers from Stanford added a commercially available voltage amplifier and a feedback resistor. This setting allows the system to automatically adapt to changes without any human intervention.

"The addition of an amplifier makes it possible to transmit power very effectively across most of the range, despite changes in the orientation of the receiving coil," added lead author Sid Assavaworarit. "This eliminates the need for automatic and continuous tuning of any aspect of the circuit."

Shanui Fan also noted: "We can investigate how to deliver electricity not only for charging electric vehicles, but also for smaller devices on or in our bodies." Everything that we can benefit from dynamic wireless charging is potentially very important. "

Charging modern electric vehicles

Currently, Chevy Bolt can travel more than 380 kilometers on one charge, and model Tesla Model 3, which is being prepared for release, will pass about 320 kilometers. But if the development of scientists from Stanford is effective, the owners of electric cars will no longer have to take care of these figures.