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The principle of electromagnetic induction heating

It is well known that the principle of electromagnetic induction heating is that a controllable high-frequency current flows into the induction coil to generate a magnetic field. The magnetic field passes through the magnetic metal, and numerous eddy currents are generated on the metal. The eddy current is a toroidal current, and the current is the metal heating. In general, it is electric energy. It is converted into magnetic energy, which in turn transforms electrical energy, which transforms thermal energy.
But why the same energy conversion can achieve the effect of saving electricity? ? In our life and production activities, heating is often used. Electric heating is the most common method. In the case of electric heating, resistance wire/quartz heating is more common. However, resistance wire/quartz heating has low thermal efficiency and there are many other disadvantages. This kind of heating method mainly depends on conduction conduction to transfer heat energy. The various heating plates and rings made of resistance wire have only one surface that is in contact with the part to be heated, which in turn causes a large part of the heat energy to dissipate in the air. .
Theoretically speaking, the traditional heating coil transmits half of the heat inside and outside, so we say that the dissipation in the air is 50%, of course, if the heater is aging then the thermal efficiency will be lower. According to the above analysis of the principle of energy-saving, electromagnetic induction heating is generated by the heating body itself eddy current self-heating, coupled with the insulation effect of the insulation of cotton, so to overcome the dissipation of heat in the air, the theoretical power-saving rate It can reach more than 50%, but it is only about 40% normal considering the energy conversion efficiency of the controller. Some occasions may reach more than 50%.

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