Definition
Induction heating is a method of heating electrically conductive material by internal eddy current losses.
Theory and Application
An induction heating device consists of two components, a high-frequency generator and an induction coil, the so-called inductor. An alternating voltage is applied to the induction coil which results in an alternating current in the coil circuit. In the surroundings of the induction coil, a time-variable magnetic field is produced. When an electricity-conducting component or semifinished product enters this magnetic field, eddy currents are induced in it. These eddy currents are short-circuited and result in heating, based on the Joule effect. In magnetic material, there are also so-called hysteretic losses, which contribute to the heating. The coil current, the alternating field, and the eddy currents have the same frequency (Rudnev et al. 2003). Figure 1shows a conventional...
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References
Benkowski G (1990) Induktionserwärmung: Härten, Glühen, Schmelzen, Löten, Schweißen (Induction heating: hardening, annealing, melting, soldering and bracing, welding), 5th edn. VEB Verlag Technik, Berlin
Kolleck R, Veit R, Merklein M, Lechler J, Geiger M (2009) Investigation on induction heating for hot stamping of boron alloyed steels. Ann CIRP 58(1):275–278
Rudnev V, Loveless D, Cook R, Black M (2003) Handbook of induction heating, Manufacturing, engineering and materials processing. Marcel Dekker, New York
Tripmacher E (1953) Industrielle Hochfrequenzanlagen (Industrial high-frequency plants). Nachrichtentechnik (Communications) 3(9):407–411
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Kolleck, R. (2014). Induction Heating. In: Laperrière, L., Reinhart, G. (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-20617-7_6484
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DOI: https://doi.org/10.1007/978-3-642-20617-7_6484
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