The paper describes the results of the experiment about efficiency improvements of the use of high frequency current and сonfirmation that the devices are working better with this type of current. The results indicate the feasibility of further experiments using better installation,in comparison with the installation that was used in the described stages of the experiment below. This installation and method of using high-frequency current will help to use all devices (but not those with an electric circuit, since electronic devices are not adapted to high frequencies, through which they fail) at the power at which they should work, because in general, at a normal frequency of 50-60 Hz there are unnecessary and unprofitable losses. To achieve this goal, the following tasks were defined: - Determine how the power changes depending on the frequency of the current in the receiving coil; - Is it really possible to increase the efficiency of devices due to high-frequency current; - Conduct experiments and draw conclusions based on them. Hypothesis: if you add two or more flat coils together, you will get a high level of frequency savings in electricity consumption. So the experiment was conducted in the laboratory of cryogenic technology of NTUU "Igor Sikorsky KPI". Instead of an induction plate, we used a frequency generator and an ordinary flat coil (the results of the experiment are not affected by the type of flatcoil: either bifilar or ordinary (from a single wire), the dependence has been established in any way). Based on the data taken from the oscilloscope and generator, a graph of the voltage dependence on the current frequency was constructed. Since the dependence of voltage and power is linear, and the current value does not change: with the increase in voltage, there is an increase in power. High-frequency current gives advantages in that it is possible to use conductors of a smaller cross-section and even then we do not get any losses. This kind of current is distributed in the layers of the conductor that are close to the surface, which is called skin effect. Eddy currents passing along the wire, directed so as to weaken the current as much as possible in the middle of the conductor and amplify it near the surface. As a result, the so called “quick-change” current is distributed unevenly-it seems like as if it is trying to be displaced to the surface of the conductor. In a conventional transformer with a core, which is designed to convert alternating current from one voltage to alternating current from another voltage at the same frequency, the resistance can be so small that eddy currents, or Fuko currents, occured. In such massive conductors, they are useless and ony interfere with the work through heating the transformer itself. But there are cases when people on the contrary use a heated property: an induction cooker. Examples of using electromagnetic induction are placing a conductor body in the middle of the coil, in which eddy currents will occur that can warm the body up to melting. In this way, metals are melted in a vacuum, which helps to obtain high-purity metals. Another example is an induction cooker, where you do not need to get rid of eddy currents, but on the contrary, use them as much as possible.
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Copyright (c) 2020 Анна Олексіївна Пелих, В. В. Гаврилюк (Автор)
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