Induction heating penetration depth

A part of these flux lines interlinks tube 2 and causes a countercurrent CI to be induced in the tube, as illustrated by the respective arrows in Fig. Magnetic wave was not the only physical phenomena that needed to be taken into consideration in order to accurately simulate the process and determine an optimal coil design that results in a desirable temperature distribution. Taking into consideration the wavelike distribution of power density is important when choosing the induction frequency necessary to provide the required hardness depth. From an Electromagnetic Perspective It was necessary to assure the balance of the following three electromagnetic effects: The two curves can be joined by a section K-L for producing a representative curve G KI r-F under which the hollow brass cylinder actually absorbs power, so that the parts of the curves DE-L and KEH therebelow can be ignored for practical purposes. It is seen that the power input increases rapidly at first as the frequency is increased, then the power input levels off and becomes constant with increased frequency, and finally increases again with frequency.
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Important Factors to Consider

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How Induction Heating works

The magnetic permeability of ferromagnetic materials strongly depends on the composition of the materials and on the circumstances temperature, magnetic field intensity, saturation. Power specs of the coil is and it would take almost second to heat my die element. Power Requirements The power required to heat your work piece depends on: This current displacement towards the surface of the conductor increases with increasing frequency. The most transfer of energy during the process of induction heating is at high frequency, when the depth of current penetration is low. Just some rough assessment:.
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Computer Modeling Helps Identify Induction Heating Misassumptions And Unknowns

Materials such as steel are typically placed inside a water cooled copper coil where they are subject to an alternating magnetic field. The field is concentrated in the area enclosed by the coil; while its magnitude depends on the strength of the current and the number of turns in the coil. Ferromagnetic materials iron, many types of steel on the contrary, have a mr-value that is much higher. Steels that have a ferromagnetic structure which is inherited from the iron can also be heated by magnetic hysteresis losses. Induction heating is used in many industrial processes, such as heat treatment in metallurgy, in the semiconductor industry, and to melt refractory metals which require very high temperatures.
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Alternatively, eddy currents near the surface can be viewed as shielding the coil's magnetic field, thereby weakening the magnetic field at greater depths and reducing induced currents. My invention relates to this type of heat-treatment. The compensated load is directly connected to the transformer. It is a known phenomenon, when an alternating current passes through a conductor, current distortion or displacement occurs, a phenomenon whereby the current density in the conductor decreases with increasing depth. The strength of the field varies in relation to the strength of the current passing through the coil. Computer modeling precisely addressed the presence of the reviewed process features and determined an optimal inductor design and process recipe, dramatically reducing development time.
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