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  • The development history of wireless charger
    Sep 25, 2017

    As early as the 19th century, 30 years, Michael Faraday found that changes in the surrounding magnetic field will produce electricity in the wire. In the 1890s, the Serbian scientist Nicolas Tesla applied for the original patent.

    Unfortunately, this research has been delayed for a century. The biggest obstacle is that transmission efficiency is too low and dangerous. Electromagnetic radiation is only suitable for transmitting information, not suitable for transmission of energy. Because radiation has no direction, energy can be wasted in useless space. It is envisaged to use directional electromagnetic radiation, such as laser, but its operability is not strong and extremely dangerous.

    Professor Xu Shuyuan, Department of Electrical Engineering, City University of Hong Kong, has successfully developed a "wireless battery charging platform" in a few years. It can put several electronic products on a charging platform without external wires, charging and charging through low frequency electromagnetic field Time is no different from traditional chargers But this technology still needs products and charger contact, which is mainly used in the field of electromagnetic coupling principle.

    Researchers at the Massachusetts Institute of Technology (MIT) have made new progress in wireless transmission of electricity, and they have lit a 60-watt light bulb with a power supply that is two meters away

    Soliqic's design, non-radiative wireless energy transmission has a distance limit, the smaller the receiver, the shorter the distance. He calculates the size of the notebook computer can be a few meters within the scope of wireless energy transmission, "so that in each room to install a launch source, you can give the entire residential laptop power supply.

    Soliqic hopes to increase efficiency to 70% to 80% by using different materials and improved technology. They believe that the improved equipment will be in 3 to 5 years for notebook computers, mobile phones and other devices for wireless charging.