How wireless Charging Works

How wireless charging works: How wireless charging works; Wireless charging has existed for a several years now, but it’s not ever really been that good. Until now, that is. The Nokia Lumia 920 and Lumia 820 (with the aid of the recharging shell) are the first Nokia smartphones to support this new feature, making charging your phone even easier than before.

All you have to do is place your phone onto a  Wireless Charging Plate.But what is wireless charging? It’s a rather basic question, but we should probably answer it just to make sure that everybody knows.

Wireless charging is a method of transmitting energy through the air to an electrical device for the purpose of charging it.

Fundamentally, in relation to smartphones, this means that your phone will be charged without having to plug the wire into your phone.

While this all sounds very simple as far as consumers are concerned, it’s actually a very methodological process.

The diagram below shows the basic principles of inductive power transmission


A transmitter coil is situated at the bottom (L1) and the receiver coil (L2) is situated at the top and these coils are inserted into different electrical devices. L1 would be the Wireless Charging Plate and L2 would be your smart phone for example.

An alternating current in the transmitter coil generates a magnetic field, which brings a voltage in the receiver coil. This voltage is then used to charge up the device.

Nokia has adopted the Qi (pronounced chi) standard in their wireless charging devices. Qi was created by the Wireless Power Consortium and is used by over 100 different companies around the globe, and is the only globally adopted interface. Plus, because it’s used globally, you’ll be able to charge up wirelessly in different places around the world.

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