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the working principle of heating in medium and high frequency induction equipment

The working principle of heating in medium and high frequency induction equipment


High-frequency induction machine is also known as high-frequency heating machine, high-frequency induction heating equipment, high-frequency induction heating device, high-frequency power supply, high-frequency power supply, high-frequency electric furnace, intermediate frequency furnace. High-frequency welding machine, high-frequency induction heating machine, high-frequency induction heater (welder), etc., as well as medium frequency induction heating equipment, ultra-high frequency induction heating equipment. The scope of application is very wide.
 

The working principle of heating in medium and high frequency induction equipment


First, in the high-frequency heating machine, a set of distinctive electronic circuits will convert the low-frequency alternating current (50Hz) input from the national grid into high-frequency alternating current (usually around 20000Hz);
 After the high-frequency current is applied to the inductor coil (ie, the electromagnetic induction coil), the electromagnetic induction principle is fully utilized to convert into a high-frequency electromagnetic field, and the effect is on the metal material object in the electromagnetic field; the eddy current effect is fully utilized, and the metal material object is transformed into The induced current (ie, the eddy current effect) proportional to the strength of the magnetic field; (this eddy current effect is affected by the skin effect, and the higher the frequency, the more concentrated on the surface layer of the metal material object). When the eddy current effect flows in a metal object, it will be converted into heat by the principle of current thermal effect by virtue of the internal resistance value.
This heat is not like the other heating methods, it depends on the external heat transfer. It is transformed directly inside the object. Therefore, this heating method is fast and efficient. It can melt all metal objects in an instant if needed. Moreover, its heating rate and temperature are controllable.
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