Wireless Electricity Transmission

Magnetic induction is a technology that you will probably remember from your physics classes at high school.

You need two coils, a transmitter coil and a receiver coil. An alternating current in the transmitter coil generates a magnetic field which induces a voltage in the receiver coil. This voltage can be used to power a mobile device or charge a battery.

The presentation below shows how to build a wireless charging system using magnetic induction. 

You will see that products need more than coils and alternatining currents. For energy-efficient power transfer the phone must be able to shut down the transmitter when the battery is full. The phone, therefore, needs to send control signals to the charging station.

The presentation is also available as PDF download.

 

From the Qi Blog

Wireless power market surges as usage leaps forward

IHS Market shares perspective on wireless power market
Read more

De’Longhi Group joins the Wireless Power Consortium

The Wireless Power Consortium has welcomed a new member recently: De’Longhi Group of Treviso, Italy.
Read more

152 brands registered a Qi product in 2016

Last year, 152 different brands registered a Qi product on the WPC website, up from 86 in 2015.
Read more