Magnetic Field and Dosimetric Study at Intermediate Frequency Range Using the Coil Source Model

Shinichiro NISHIZAWA
Friedrich LANDSTORFER
Kouta MATSUMOTO
Osamu HASHIMOTO

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.4    pp.524-530
Publication Date: 2006/04/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.4.524
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
Keyword: 
coil model,  equivalent source model,  intermediate frequency,  magnetic field,  EN50366 (CENELEC),  induction heater (IH),  

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Summary: 
In this paper, the magnetic field properties and the dosimetry at intermediate frequency (21 kHz) for an induction heater are investigated with the coil model, which is prescribed as substitute source model in the European standard EN50366 (CENELEC). The accuracy of the magnetic field vectors and the values of the induced current density, which are achieved with the coil model, are compared with the results of a realistic model of the induction heater obtained from the equivalent source model. It is shown that the coil model coincides well for the magnitude of the magnetic field strength around the induction heater. On the other hand, the dominant field vector of the coil model differs significantly from the real induction heater, which leads to induced current densities in the body model which are three time larger. Owing to these results, the applicability of the coil model prescribed in the EN50366 is confirmed for the induction heater.