WiTricity was a project at MIT in 2006 that demonstrated wirelessly powering a 60 watt light bulb from over 2 meters away using two copper coils that resonated at 9.9 MHz. Researchers were able to power the light bulb with roughly 90% efficiency from a distance of 3 feet even when the direct line of sight was blocked. The research was later spun off into a private company to develop wireless power transfer using resonant coupling between magnetic resonators.

1. WI-TRICITY
GO CORDLESS!
DIPAK HORO

2. BABY WITRICITY
The term WiTricity was used for a project that took place at
MIT, led by Marin Soljačić in 2006. They successfully
demonstrated the ability to power a 60 w light bulb wirelessly,
using two 5-turn copper coils of 60 cm d, that were 2 m away.
The coils were designed to resonate together at 9.9 MHz and
were oriented along the same axis. One was connected
inductively to a power source, and the other one to a bulb. The
setup powered the bulb on, even when the direct line of sight
was blocked using a wooden panel. Researchers were able to
power a 60 w light bulb at roughly 90% efficiency at a distance
of 3 feet. The research project was spun off into a private

3. WiTricity kya he???
Dubbed “highly resonant
wireless power transfer”

4. “Resonance” is a property that exists
in many different physical systems. It
can be thought of as the natural
frequency at which energy can most
efficiently be added to an oscillating
system.

6. Resonant coupling occurs when the natural
frequencies of the two systems – a source
and a receiver — are approximately the
same. WiTricity power sources and receiver
devices are specially designed magnetic
resonators that efficiently transfer power
over large distances via the magnetic near-
field.

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