Wireless charging to charge the whole car is running

From wireless charging technology to smartphones, scientists are continuing to study further to be able to provide power at greater distances and to moving objects such as cars, robots, airplanes. Driverless.

This new technology with great potential was developed from a team of scientists at Stanford University, USA, which was just published in the journal Nature Electronics . With this technology, electric vehicles will be charged while on the road , or the robot will not run out of battery while moving around the factory floor.

In 2017, researchers first announced wireless charging technology. Now, it has been developed to be more efficient, stronger and more practical, so it can now leave the lab soon.

This technology can revolutionize the way devices operate and the way people move.

"This is an important step to put into practice an effective system to wirelessly charge cars and robots, even when they are moving at high speeds," said Shanhui Fan, electrical engineer .

"For charging a moving car, we will have to increase the power, but I do not think it is a serious barrier. And for charging the robot, we were able to apply it." in fact, " said Professor Shanhui Fan.

Wireless transmission depends on generating vibrating magnetic fields that can cause the electrons in the conductor to also oscillate at a specific frequency. However, that frequency is easily tangled if the device moves. Therefore, when charging smartphones need to be fixed on the charger.

What Stanford scientists did in 2017 was to set up a resistor loop and the feedback amplifier could change the operating frequency as the device moved. At that stage, only 10% of the energy is transferred through the system on the move.

Now, scientists have increased this efficiency up to 92%. The huge increase in efficiency is due to the new ' switch mode ' amplifier - a more precise, but much more complicated, solution. That's why it took the team another three years to develop it to a satisfactory level.

The basic idea of ​​this technology remains the same as in 2017: adjusting the resonant frequency from the charger as the device moves around. Currently, the system can transmit 10W of power over distances up to 65 cm, but the researchers say there's no reason why it can't accelerate faster.

An electric car will need hundreds of kilowatts when charging, if the wireless charging system is integrated into the road, it will be fast enough to power it. The only drawback is how fast the car's battery can absorb energy as it accelerates.

For other potential applications, robots can be charged using floor pads of the environment in which they are operating, or unmanned aircraft can charge when passing through the roof of the system installation during the journey. of them. Meanwhile, the vehicles will not have to return to the base to recharge, robots and drones will not even need to stop.

Currently, this technology has a prototype and scientists say it all operates in frequencies that pose no danger to human health. It can revolutionize the way devices operate and the way people move.

"To exploit the full benefits of providing wireless energy, it is important to develop a schematic efficient and powerful, capable of powering the device when motion" , the written research.