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Old 07-19-2018, 10:09 PM
Allen Burgess Allen Burgess is offline
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Join Date: Sep 2011
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Maxwells equation for frequency.

Effect of Frequency on Induction Heating

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.


Last edited by Allen Burgess; 05-15-2019 at 02:01 AM.
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