I often showcase various technologies, but the extraordinary inventions earn a Dr. Coffee's Innovation Award. This invention from WiTricity Corp. of Cambridge, MA uses magnetic waves to safely transfer electricity through the air and into working devices. The device takes AC power and converts it into magnetic waves. Magnetic waves are then taken to a resonance device which amplifies their magnetic field. After the amplified magnetic wave is transferred to the consuming device, it is converted back into an AC power signal. The company's "technology" website gives a brief description of their proprietary resonance technology.
Resonant Magnetic Coupling: Magnetic coupling occurs when two objects exchange energy through their varying or oscillating magnetic fields. Resonant coupling occurs when the natural frequencies of the two objects are approximately the same.
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Two idealized resonant magnetic coils, shown in yellow. The blue and red color bands illustrate their magnetic fields. The coupling of their respective magnetic fields is indicated by the connection of the colorbands.
If this technology works as claimed, it would be like a science fiction movie come to life. The problems that I can see they will have to overcome are:
1. Scaling down the resonant coils to less than a large book.
2. Energy loss in the electricity-to-magnetic conversion and back.
3. How do you control several devices in one room (frequency)?
This is definitely a leap forward if practically done.