Energy

Stanford researchers move closer to the wireless charger of the electric vehicle

Stanford engineers have moved a massive step for making the electric vehicle more practical to recharge at the fast speed as a more futuristic method to construct the refueling vehicle wirelessly. The wireless charging pad is available for smartphones and works when the phone is sitting still. The cars are inconvenient as the current ways of plugging them for some hours or two in the charging station.

Stanford electrical engineers three years ago, Sid Assawaworrarit and Sanhui Fan, who is graduate in the lab, developed the first system that can charge the vehicle in motion. However, the technology had some shortcomings that cannot be outside the lab.  

The two upcoming engineers demonstrated the technic that one day would be of help to provide the power on the moving vehicle on the road. The term of the system could soon make it functional to charge the car wirelessly as they move within the warehouse on the factory floor. The move enables the robot to work at the same time while charging.

According to Fan, the idea is an essential step toward the efficient and the sound system that recharger wirelessly the vehicles and the robots even at high speed. The power is scaling on the recharging car, but it will not cause traffic or the roadblock on the highway. For the moment of recharging the robot, we are within the useful and practical range.

The transmission of electricity through wireless means is by creating a magnetic field that moves at a fast frequency and develops a resonating vibration in the coil of the magnet, which is at the receiving end. The main challenge is the change in the distance from the source to the receiver vehicle, which differs in a limited amount.

A three years breakthrough in the research has helped the researchers have developed a wireless charger that will transmit electricity from a distance up to the receiver. The study was through the incorporation of an amplifier and the feedback resistor that allows the charging system to adjust automatically between the charger and the moving vehicle. The first system developed was not practical and efficient. The presence of the amplifier that uses a lot of electricity on the inner part produces enough implication effect, and the system transmits only 10 percent of the power flow in the system. 

In the new paper,  the researcher shows how the system will charge wireless through the transmission of electricity at 93 percent, according to Fan. 

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