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

Takeaways of CES 2017

“What’s new?” That’s what people usually asked when they visited the WPC booth at CES 2017 in Las Vegas a couple weeks back.
Read more

Global Perceptions of Wireless Power: New Market Study

The WPC commissioned a new market study to see how consumers felt about the latest collection of wireless products and services.
Read more

iHome Joins the WPC and Announces New Alarm Clock Delivering Hassle Free Wireless Charging for Qi Compatible Android Devices

Last week iHome announced that it is releasing two new alarm clocks that will include the latest features and ability to keep both Apple and Android devices fully charged.
Read more