Wireless Power Transfer System 1Kw Via Inductive Link Enhanced by Iron Core

Wireless Power Transfer is a wide spread concept practiced in diverse applications as charging of mobile phones as well as implanted medical devices in human bodies to further providing power across thin walls when latter cannot be holed. The current study is a first attempt to determine at this stage mainly via elementary measurements qualitative tendencies and possibilities for transmitting electric power through the air by a simple electric device employing fundamental electromagnetic principles. Obtained measurements indicating good prospects for realistic applications are expected to be followed in a next stage of development by quantitative theoretic analysis. The following paper shall present a system capable of transmitting electric power through the air. Significance of the system is its simple construction employing no power electronics, inverters and rectifiers. It functions on the principle of inductive coupled power transfer as being practiced in the conventional transformer. Induction in the windings occurs at grid frequency as the system is designed to be operated directly by the domestic supply <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$240 \mathrm{V}, 50 \text{Hz}$</tex>. Two desk scanner size C shaped cores wrapped with windings, one functioning as sender and the other as the receiver can transfer 1 kW across a distance of 10 cm operating a 1000 W electric heater across adjacent rooms. The comparably low power transfer efficiency of around 55% restricts the system to temporary, short time and emergency applications. However, the simple construction and high power transfer through usual wall width distances suggests diverse applications giving cause to a targeted qualified analysis of the magnetic circuit with respect to its potential to process power.