Shielding of EM fields in induction heating and melting installations
نویسندگان
چکیده
The purpose of the work is to evaluate the EMF levels in the surroundings of particular induction heating installations used for melting metals and some methods for mitigating them. The data from measurements in a metal foundry will be presented and discussed with reference to the limits for occupational environment. In some cases the measured levels overcome the ICNIRP limits. For these cases a deep study to mitigate the exposure levels of the workers has been done by means of numerical simulations. Ad hoc numerical method is proposed and discussed. Some solutions for decreasing the levels of electromagnetic fields (in particular magnetic flux density in the case of induction heating devices) are proposed. These solutions have been tested in the foundry and the field levels after shielding have been compared with the model prediction.
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