Tuesday, September 14, 2010

Fujitsu Shows Improved Wireless Charging System

Fujitsu Laboratories has demonstrated a wireless recharging technology that enables the design of magnetic resonance-based wireless charging systems that can simultaneously recharge various types of portable electronic devices. Fujitsu said its technology promises more compact and more efficient power transmitters and receivers for mobile phones, digital cameras, notebook computers, and other portable electronics.

Fujitsu said electromagnetic induction has been often used for wireless charging, however the method only works over short distances, and the power transmitter and power receiver need to be in alignment. By contrast, magnetic resonance, which was first proposed in 2006, uses a coil and capacitor as a resonator, transmitting electricity through the magnetic resonance between the power transmitter and power receiver. This method can transmit electricity over a range of up to several meters, and because a single transmitter can power multiple receiving devices, developments are under way for a broad range of potential applications, charging everything from portable electronics to electric cars.

Fujitsu Laboratories has developed a technology that dramatically shortens the time required to design transmitters and receivers for magnetic resonance charging systems and, in addition, enables accurate tuning of resonant conditions in the design phase, even for compact transmitters and receivers that are prone to influences from nearby metallic and magnetic objects.