Projects

Wireless Electricity

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Project Owner : aman045.09
Created Date : Wed, 15/08/2012 - 07:01
Project Description :

Wireless power transfer may seem like science fiction, but the idea is more than 100 years old. Around 1900 Nicola Tesla claimed to be able to radiate power over long distances with minimum loss of power, took a patent and even got some industrial finance for trials. These failed. Hundred years later, an electric toothbrush using contactless inductive charging device is a common commodity in many households. Even more recently new breakthroughs are claimed to radiate enough energy from a power outlet to feed a nearby low-voltage lamp or electronic device. Wireless power transmission is the means to power devices without a built in power source such as a generator or battery. There are multiple needs and uses for such technology. One initial use of such technology is found in powering small devices where much of the size of the device is in the battery itself. By eliminating the battery in a small device it would be possible to compact the device even further. Furthermore, on a larger scale as consumable energy sources on the planet are dwindling in number it remains an important task to look to the future. If it was possible to transmit power wirelessly it would be economical to retrieve power from outer space and simply transmit it back to the planet’s surface as an endless power source. In our initial research we discovered many have looked into the feasibility of wireless power transmission and there are many solutions that all offer promise.I choose to research the feasibility of wireless power transmission through inductive coupling. This consists of using a transmission and receiving coils as the coupling antennas. Although the coils do not have to be solenoid they must be in the form of closed loops to both transmit and receive power. To transmit power an alternating current must be passed through a closed loop coil. The alternating current will create a time varying magnetic field. The flux generated by the time varying magnetic field will then induce a voltage on a receiving coil closed loop system. This seemingly simple system outlines the major principle that our research investigated. The primary benefits to using inductive coupling are the simplicity of the transmission and receiving antennas, additionally for small power transmission this is a much safer means of conveyance. 

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