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Assessment of Low-Frequency Magnetic Fields Emitted by DC Fast Charging Columns
Germana Trentadue1, Rosanna Pinto2, Marco Salvetti1
1European Commission, Joint Research Center (JRC), Ispra, Italy.
Bioelectromagnetics
|February 12, 2020
Summary
Electric vehicle charging may expose users to magnetic fields. Measurements show localized high magnetic flux density near some chargers, but exposure levels decrease significantly with distance, remaining below safety limits.
Area of Science:
- Bioelectromagnetics
- Electromagnetic field exposure
- Electric vehicle technology
Background:
- Widespread electromobility necessitates understanding human exposure to magnetic fields from electric vehicles (EVs) and charging.
- Increasing EV battery capacity and faster charging power lead to higher currents and potentially stronger magnetic fields.
Purpose of the Study:
- To assess low-frequency magnetic fields emitted by commercial fast-charging devices.
- To contribute to a standard measurement procedure for magnetic fields from direct current (DC) charging columns.
Main Methods:
- Experimental assessment of magnetic fields from five fast-charging devices during recharge and standby.
- Measurement of magnetic field spectrum, amplitudes, and exposure indices using a magnetic field probe analyzer.
- Identification of worst-case scenarios for instantaneous physical effects.
Main Results:
- Localized magnetic flux density peaks exceeding 100 μT at 50 Hz were found near three of five chargers during recharge.
- These high levels were measured within close proximity, with exposure indices dropping below 50% of reference levels beyond this distance.
- Measurements covered the 25 Hz–2 kHz frequency range.
Conclusions:
- While localized high magnetic fields can occur near EV fast chargers, exposure levels generally decrease rapidly with distance.
- Further research and standardization are needed for accurate magnetic field assessment during EV charging.
Keywords:
DC charginge-mobilityfast charginghuman electromagnetic field exposuremagnetic flux densityMore Related Videos
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