Abstract
With the rapid development of electronic information industry, product of science and technology change rapidly, mobile phone, tablet computer, the appearance of continuous transformation, but the power line has been exist, not only the use is inconvenient, also caused some waterproof, dustproof, charging contact point for product development (hole) protection limit. Wireless charging technology emerged, however, wireless charging to popularize, the key is "unified standard" and "a lot of the fabric construction". The current global wireless charging three camps respectively by WPC (Wireless Power Consortium), PMA (Power Matters Alliance) and A4WP (Alliance for Wireless Power) composition. Wireless charging technology based on WPC electromagnetic coupling, Qi standard, and it is also the three largest organization establishs the earliest, the largest wireless charging organization. But the transmission distance is short, and difficult to achieve multi device while charging. A4WP use of technology for magnetic resonance, Rezence standard, in 2014 in cooperation with the PMA strategy. At the same time, the resonant technique allows long distance charging, charging plate can be embedded in the wood, plastic and other materials, and at the same time a number of charging device.
Keywords:wireless charging, A4WP, Rezence, resonant, mobile phone charging