Numerical and experimental assessment of magnetic field exposure during electric vehicle charging in a real public inductive charging station

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Gernot Schmid¹, Pia Schneeweiss¹, Rene Hirtl¹, Johannes Kainz ^1,2, Sarah Driessen², Luis Kalb³, Dino Silvestro³, Matthias Vogt³

¹ ​​​​​​​Seibersdorf Labor GmbH
² Uniklinik RWTH Aachen
³ ADAC Technik Zentrum

Poster-Abstract

In this work, we present the results of an exposure assessment based on detailed measurements in the vicinity of a publicly accessible 85 kHz / 22 kW WPT-based charging station in the city of Cologne, Germany. Measurements of the magnetic flux density were carried out both inside and outside of the vehicle.

Moreover, the measurements were supplemented by numerical computations of the relevant in situ dosimetric quantities induced in high-resolution anatomical body models. The measurements showed that local magnetic flux densities in typically accessible areas inside the vehicle were close to but did not reach the reference level for the general public according to the EC recommendation 1999/519/EC.

Outside the vehicle at street level, substantially higher magnetic flux densities occurred, up to a factor of 5-6 above the reference levels. However, numerical computations with anatomical body models demonstrated that the in situ dosimetric quantities induced inside the body remain well below the corresponding basic restrictions recommended by ICNIRP 2010 and the EC recommendation 1999/519/EC under typical exposure conditions.