Technology that can charge smartphones wirelessly from Bag's mobile battery "Electromagnetic Resonance Wireless Power Transmission"

Qi (Qi)Are attracting attention as a technology that enables smartphones to "just charge as much" as possible. Such a wireless power supply technology had a neck that it was necessary to bring it closer to the terminal to be charged, but at Mitsubishi Engineering, even at a distance of 4.5 centimeters, wireless power can be supplied while maintaining high efficiency of 80% Electromagnetic Resonance Wireless Power Transmission "developed,Wireless Japan 2014We had a demonstration at the booth.

Mitsubishi Electric Engineering Co., Ltd.
http://www.mee.co.jp/

Arrived at Mitsubishi Engineering booth.


There is a model of a windmill.


This is a demonstration of "electromagnetic resonance type" wireless power supply. It is a technology that developed electromagnetic induction, and it is possible to wirelessly transmit power with high efficiency with a coil at a distance of up to 4.5 centimeters.


I got a demonstration done at once. When you press the button, the windmill is powered wirelessly and the feathers spin around.


The state of the demonstration can be confirmed in the following movie.

"Electromagnetic resonance type wireless power transmission" that maintains charging efficiency of 80% even 4.5 centimeters apart - Wireless Japan 2014 - YouTube


Electromagnetic resonance type wireless power transmission uses 6.78 MHz band, does not affect the human body, and there are no products that compete with radio wave band at the present time.


The power efficiency is about 80%, which is comparable to the Qi type wireless charger currently on the market.


Even if you leave 4.5 centimeters, it's safe, so if you set it in the desk, you can charge it by placing a smartphone on the desk.


Furthermore, it is under development to further extend the distance over which electric power can be transmitted. You can check the state of charge being able to charge even if it is separated from the coil for power supply at various angles in the following movie.

"Electromagnetic Resonance Wireless Power Transmission Technique Enabling Wireless Power Transmission Even When Move Position" Demo Wireless Japan 2014 - YouTube


If development of "electromagnetic resonance type wireless power transmission" expected to play a leading role in wireless power supply progresses, charging can be carried out at all times by placing a mobile battery in the bag or it can be charged automatically if the electric vehicle is parked And it seems that life will become more convenient.