Wireless Power Transmission

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Dr. Raisz Dávid Márk
Department of Electric Power Engineering

In the last decade we have seen a rise in the number of mobile devices: laptops, PDAs, smart phones, smart watches, toothbrushes and even electric cars that are becoming more and more popular. These devices are all powered by batteries, ones that we need to charge periodically and that stresses our power transmission systems.

They need a large amount of power and a number of wall-plugs, all of them have separate switched mode power converters plugged in and meters of charging cable that takes up a lot of space. Our rooms are entangled by wires, and our battery powered systems need to be recharged constantly, during that time we can’t even use them properly, and if we want a longer battery life we have to use larger or more cells, creating dangerous waste, an environmental hazard.

The need for a wireless charging method is clear, and we might have a solution: Wireless power transfer (WPT). It could solve these practical problems and could provide new special applications of supply, like powering satellites, electrical airplanes, or charging electrical cars in motion.

My thesis attempts to

• collect the most important available methods to transfer energy wirelessly

• give an overview of the existing and useful applications that are already on the market, as well as theoretical plans for the future

• show the effect of these devices on modern power electronics and how it can change the transfer systems we use today

At the end of the thesis I will try to document the planning and building of a small demonstration circuit that is based on magnetic resonance coupling, and ideas, how to improve it into a commercial product.


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