A LOCAL company has launched a wireless power transfer (WPT) technology that makes long-distance power transmission safe, reliable and cost-effective. The technology is considered to be a disruptive invention that might change methods of power transmission throughout the world, Shenzhen Economic Daily reported Thursday.

With this technology, you can recharge your phones wirelessly at a distance as far as 120 meters away from the power source if your phone is installed with a new chip for the purpose, the paper said.

Chen Zhe, operating partner of the company called Sihe Rui (Shenzhen) New Technology Co. Ltd., said at a release event Wednesday that the self-developed direct wave wireless technology can achieve power transfers at distances greater than 120 meters.

At this distance, the received power can reach 12 watts (laboratory distance is more than 1.6 kilometers), while the distance of other WPT technologies is measured in millimeters.

At present, the conversion efficiency of a mainstream WPT system is 70 to 90 percent, but the conversion efficiency of the company’s new WPT system can reach 95 percent, which is close to the efficiency of wired transmission, according to the company.

According to Chen, the company’s wireless technology is also safe as it has a low frequency and does not emit radiation.

Different from the existing mainstream WPT technology, which is at a frequency of 6.78 MHz, the company’s system adopts a frequency range of 3 to 6 MHz, which avoids the damage that high frequencies can do to the human body, said Chen.

(Zhang Yu)