Wireless charger refers to the charger that is connected to the terminal equipment that needs charging without the traditional charging power cord. Using the latest wireless charging technology, the magnetic field generated between coils is used to magically transmit electric energy. Inductive coupling technology will become a bridge connecting charging base stations and equipment. Wireless charging technology won 20 patents in 2007, and many devices can use one charging base station, so wired charging of mobile phones, MP3 players, power tools and other power adapters will not exist. A British company invented a new type of wireless charger, which looks like a plastic mouse pad. You can charge your phone by putting it on the pad, and you can charge multiple devices at the same time. According to the British magazine "New Scientist" published on the 22nd, this "mouse pad" is equipped with densely arranged small coils, which can generate a magnetic field and transmit energy to electronic equipment equipped with special receiving coils for charging. The receiving coil is made of magnetic alloy wound wire, which is similar in size and shape to chewing gum and can be easily attached to electronic equipment.
As early as 65438+30s, michael faraday discovered the change of the surrounding magnetic field? The modularization of wireless charger will generate current in the wire. Serbian scientist nikola tesla applied for the first patent in 1990s. But unfortunately, the research in this field 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 energy. Because radiation has no directionality, energy will be wasted in useless space. Some people imagine using directional electromagnetic radiation, such as laser, but it is not feasible and extremely dangerous.