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Hem> Blogga> New Electronic Product-Wireless Charger

New Electronic Product-Wireless Charger

May 19, 2020
       New electronic products, especially portable electronic products such as digital cameras, mobile phones, tablet computers, etc. are more and more used in people's work and life, and the matching chargers also use traditional wired chargers. The compatibility and versatility of the wired charger are relatively poor, and it is inconvenient for users to carry and charge. At the same time, post-disposal treatment increases environmental pollution. Therefore, it is urgent to provide users with more reliable, convenient, convenient and timely charging equipment. The development of wireless technology makes the transmission of radio power possible, and the research and development of wireless chargers will also realize the requirements of users.
wireless charger
      There will be three main forms of battery charging in the future: visual charging, smart charging and wireless charging. In 2016, there were only 138 members of the International Wireless Charging Union (WPC), but this year there are more than 200 WPC technology companies, such as Apple, Samsung, HTC, Huawei, Lenovo, Xiaomi, Nokia, Sony and many other mainstream mobile phone manufacturers. In general, a Qi wireless charger has a flat surface, called a charging pad, and mobile devices can be placed on it for charging. Qi specifies three different methods for coil calibration, namely: guided positioning (magnetic attraction), free positioning (moving coil), and free positioning (coil array). These three methods are briefly described below.

      First, guided positioning (magnetic attraction): that is, one-to-one fixed position charging is used to guide the placed charging device and achieve accurate calibration. The advantage of this calibration method is simple, but it requires a series of magnets in the charging device. The attracted material, therefore, the power loss associated with eddy currents (and thus increased temperature) will be attracted to the magnetic attractor. Second, free positioning (with a movable primary coil): also a one-to-one charging device that can be positioned for charging. This method requires a mechanically movable primary coil, which is tuned to be coupled to the position of the charging device, however, Movable mechanical parts tend to reduce the reliability of the system. In addition, the control of the primary coil motor for multiple devices that are charged is complicated and expensive. Third, free positioning (coil array): allows multiple devices to charge without considering their position. Compared with the above two methods, this calibration method is based on more expensive and more complicated winding structure and control electronics. The price provides more user-friendliness.



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