QI Wireless Mobile Device Charging Technology

A standard developed by the Consortium of wireless electromagnetic energy (Wireless Power Consortium, WPC) for inductive energy transmission over distances of up to 4cm. Qi Hardware includes transmitter plate and a compatible receiver in a connected device. When using, the connected device is placed on the plate of the transmitter. Charging occurs through induction energy transfer such as in transformers. Consortium wireless electromagnetic energy was founded in 2008, and is open and integrates a variety of Asian manufacturers in Europe and America. His goal is to create a single standard for inductive charging technology. We do not need the PF100 cable and the speed charger or maybe the chocolate charger power bank battery case.

Qi standard devices use electromagnetic induction between two flat coils. One of them is the base and is connected to a power source, and the second is inside the charger and a receiver. Qi standard provides two options: low power - from 0 to 5 and average power - up to 120 watts. Qi standard specification is available and free. When the Qi standard pick up in popularity, is expected appearance of public chargers in cafes, airports, sports arenas, and so on.

Thus, charging standard Qi smartphone we need: AC power adapter, LG wireless transmitter Qi, Qi receiver. How should the above, our smartphone will be charged at a low power standard to 5 watts. Charging takes place according to the following algorithm: the charger all the time in the "Search" mode as soon as it will determine the smartphone with Qi receiver controller delivers alternating current to the transmitter coil. As a result of the alternating magnetic field in the receiver coil it on Faraday's law arise EMF (electromotive force). Since the receiver coil circuit is closed, then it appears an alternating current, which is fed to a rectifier and a voltage regulator, and then in the battery charging circuit smartphone. Thus the energy of the network is transformed and transmitted to the smartphone. At the end of the charging process the receiver signals the controller, sends End Power Transfer, that the battery is fully charged and the battery charger stops the process.

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