Look Ma, No Wires!

There's something very inefficient in the way we power many of our portable electronic devices, periodically attaching them to adapter-cord tethers so batteries can be recharged and operation can once again become truly “portable.” Scientists at the Massachusetts Institute of Technology (MIT) have developed the basis for a technology that could bring wireless convenience to battery ...

09/01/2007


There's something very inefficient in the way we power many of our portable electronic devices, periodically attaching them to adapter-cord tethers so batteries can be recharged and operation can once again become truly “portable.” Scientists at the Massachusetts Institute of Technology (MIT) have developed the basis for a technology that could bring wireless convenience to battery recharging, allowing you to pack all those adapters into a drawer for good.

The MIT team, with members from the school's physics, electrical engineering and computer science departments, along with its Institute for Soldier Nanotechnologies, adapted known qualities of magnetically coupled resonance to transmit electricity from a power source to light a 60-watt light bulb seven feet away. Calling their process “WiTricity,” the researchers say the technology operates even with line-of-sight interruptions, but without harmful effects on humans or animals.

Both the power source and receiving device incorporate copper coils designed to resonate with each other. This resonant relationship ties sender and receiver coils together without affecting the surrounding environment. Though the transmission range is limited, developers say power levels sufficient to run a laptop computer could be transmitted over room-sized distances.





Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Boiler basics; 2017 Product of the Year winners; Manufacturing facilities Q&A; Building integration; Piping and pumping systems
2017 MEP Giants; Mergers and acquisitions report; ASHRAE 62.1; LEED v4 updates and tips; Understanding overcurrent protection
Integrating electrical and HVAC for energy efficiency; Mixed-use buildings; ASHRAE 90.4; Wireless fire alarms assessment and challenges
Power system design for high-performance buildings; mitigating arc flash hazards
Transformers; Electrical system design; Selecting and sizing transformers; Grounded and ungrounded system design, Paralleling generator systems
Commissioning electrical systems; Designing emergency and standby generator systems; VFDs in high-performance buildings
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me