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Fujitsu unveils design tool for MR wireless charging

Posted: 15 Sep 2010 ?? ?Print Version ?Bookmark and Share

Keywords:transmitter? receiver?

Fujitsu Laboratories Ltd.has unveiled a design technology that it says is able to quickly create wireless charging systems that use magnetic resonance.

The technology, which is slated to be presented at the 2010 conference of the Institute of Electronics, Information and Communication Engineers at the Osaka Prefecture University, Japan, promises smaller and more efficient power transmitters and receivers, as well as the ability to reduce charging times to just 1/150th of the time currently required.

Fujitsu uses a magnetic field analysis simulator to assess the coil model and a specialized circuit simulator to check the resonance conditions, including the capacitor model. It allows for the speedy design of wireless charging systems for multiple transmitters and receivers at once using several coil sizes.

The system automates the design of the wireless charging system by precisely matching the desired resonance requirements using an assessment function that maximizes the charging efficiency.

Fujitsu said magnetic resonance-based wireless charging systems are better than those using electromagnetic induction as they can transmit electricity up to several meters and can charge several devices at the same time. A coil and a capacitor is used as a resonator to transmit electricity between the power transmitter and the power receiver.

The company said it was able to design a slim power receiver for prototype mobile phones that was able to charge anywhere within the range of the power transmitter regardless of its position to the transmitter. It reported a charging efficiency of 85 percent.

Fujitsu aims to continue research and development of the technology with the aim of bringing final devices to market by 2012.

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