In this paper theory and methodology to analyze non-sinusoidal/pulsed fields created by industrial sources in the low frequency range are presented. The methodologies to analyze non-sinusoidal fields are introduced by recalling the fundamental electrostimulation mechanisms. Finally, a case study of a resistance spot welding gun is considered and the results are discussed. Regarding the resolution of the human model, it is found that using a 1 × 1 × 1 mm3 discretization and then apply a spatial averaging in a volume of 2 × 2 × 2 mm3 is almost equivalent to the direct use of a resolution equal to 2×2 × 2 mm3. Furthermore, several metrics to remove numerical artifacts are also tested. Some of them are based on the percentile filtering whereas others are based on a statistical procedure aimed to filter out the outliers in the numerical solution. It is pointed out that, for a localized exposure, the statistically based approaches goes in the direction to define a metric able to adapt to each specific exposure condition, the 99th percentile can underestimate the actual maximum that, on the contrary, it is better estimated by the 99.9th percentile.
Compliance of non-sinusoidal or pulsed magnetic fields generated by industrial sources with reference to human exposure guidelines / Giaccone, L.. - ELETTRONICO. - (2020), pp. 1-6. (Intervento presentato al convegno 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020 tenutosi a (ITA) nel 2020) [10.1109/EMCEUROPE48519.2020.9245701].
Compliance of non-sinusoidal or pulsed magnetic fields generated by industrial sources with reference to human exposure guidelines
Giaccone L.
2020
Abstract
In this paper theory and methodology to analyze non-sinusoidal/pulsed fields created by industrial sources in the low frequency range are presented. The methodologies to analyze non-sinusoidal fields are introduced by recalling the fundamental electrostimulation mechanisms. Finally, a case study of a resistance spot welding gun is considered and the results are discussed. Regarding the resolution of the human model, it is found that using a 1 × 1 × 1 mm3 discretization and then apply a spatial averaging in a volume of 2 × 2 × 2 mm3 is almost equivalent to the direct use of a resolution equal to 2×2 × 2 mm3. Furthermore, several metrics to remove numerical artifacts are also tested. Some of them are based on the percentile filtering whereas others are based on a statistical procedure aimed to filter out the outliers in the numerical solution. It is pointed out that, for a localized exposure, the statistically based approaches goes in the direction to define a metric able to adapt to each specific exposure condition, the 99th percentile can underestimate the actual maximum that, on the contrary, it is better estimated by the 99.9th percentile.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2958932