Working Principle of Induction Cooker | Induction Cooktop Heating Principle | ഇൻഡക്ഷൻ കുക്കർ പ്രവർത്തനം
Induction cookers are working based on the principle of electromagnetic induction. in an induction cooktop, there is an induction coil to produce an electromagnetic field that is excited by a high current with high frequency. so that this will produce a high-frequency magnetic field or fast-changing magnetic field which is linked with the pan placed on the cooktop. if the pan is made with the material that has low skin depth or skin effect will suppose to heat up according to the strength and frequency of the magnetic field
This heat utilizes to boil the water and process the food items.
The electrical frequency influences the process of induction heating. The desirable frequency range is determined by the dimensions of the work piece, type of material, arrangement between the object and the coil, and the desired depth of penetration. As the frequency is increased, the penetration of heat is decreased. The normal range of frequency is 500 Hz to 10 kHz, known as medium frequency, and 100 kHz to 2 MHz, called high range. Frequencies in the range of 100 to 450 kHz create comparatively high energy heat that is suitable for rapid heating of small objects, or the skin of large parts. When deep penetration of heat is required, extensive cycles of heating at low frequency are essential, frequency range being 5-30 kHz. The most transfer of energy during the process of induction heating is at high frequency, when the depth of current penetration is low. It has been established that the recommended frequency should be such that the depth of penetration should not be more than 1/8 times the diameter of work piece.
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