New power supply solution could help remote workers’ business continuity

The Georgia Institute of Technology has developed a micro-generator which could provide enough energy to power a mobile telephone or laptop through an extended power outage. This would provide a good solution to enabling remote and home workers to continue to be able to operate through extended power outages.

The micro-generator is about 10 millimetres wide and when coupled with a similarly sized gas-fuelled microturbine (or jet) engine, the system has the potential to deliver an energy supply that can last 10 times longer than a conventional battery.

Developed by doctoral candidate David Arnold, postdoctoral fellows Dr. Iulica Zana and Dr. Jin-Woo Park, and Professor Mark Allen, in the School of Electrical and Computer Engineering at Georgia Tech, the microgenerator produces useful amounts of electricity by spinning a small magnet above a mesh of coils fabricated on a chip. The microelectromechanical system (MEMS) was developed in close collaboration with Sauparna Das and Dr. Jeffrey Lang in the Department of Electrical Engineering and Computer Science at the Massachusetts Institute of Technology (MIT).

While work has been underway for several years on various microengine concepts, Georgia Tech’s generator has now demonstrated the ability to produce the wattage necessary to power an electronic device, Arnold said.

The device’s magnet spins at 100,000 revolutions per minute (rpm), much faster than the comparatively sluggish 3,000 rpm of an average car engine. Speed like that is capable of producing 1.1 watts of power, or enough juice to run a cell phone. If the project reaches its projected goal, it will eventually produce as much as 20 to 50 watts, capable of powering a laptop.

The research is part of a larger project funded by the Army Research Laboratory to create lighter portable power sources to replace the heavy batteries that currently power a soldier’s equipment, such as laptops, radios, and GPS systems. Researchers at the University of Maryland and Clark Atlanta University also collaborate on the project.

•Date: 25th Nov 2004 • Region: N.America •Type: Article •Topic: Power management
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