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Assessment of Low-Frequency Magnetic Fields Emitted by DC Fast Charging Columns

2020 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 1585

Magnetic field measurements from five DC fast-charging devices (recharge and standby) in the 25 Hz–2 kHz range found localized magnetic flux density peaks above 100 µT at 50 Hz in three of five chargers when measured in close proximity during recharge. At gre…

Study snapshot

Publicationmanual · 2020
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingInsufficient

Abstract

Assessment of Low-Frequency Magnetic Fields Emitted by DC Fast Charging Columns Trentadue G, Pinto R, Salvetti M, Zanni M, Pliakostathis K, Scholz H, Martini G. Assessment of Low-Frequency Magnetic Fields Emitted by DC Fast Charging Columns. Bioelectromagnetics. 2020 Feb 11. doi: 10.1002/bem.22254. Abstract The expected imminent widespread use of electromobility in transport systems draws attention to the possible effects of human exposure to magnetic fields generated inside electric vehicles and during their recharge. The current trend is to increase the capacity of the battery inside the vehicles to extend the available driving range and to increase the power of recharging columns to reduce the time required for a full recharge. This leads to higher currents and potentially stronger magnetic fields. The Interoperability Center of the Joint Research Center started an experimental activity focused on the assessment of low-frequency magnetic fields emitted by five fast-charging devices available on the market in recharge and standby conditions. The aim of this study was to contribute to the development of a standard measurement procedure for the assessment of magnetic fields emitted by direct current charging columns. The spectrum and amplitudes of the magnetic field, as well as exposure indices according to guidelines for the general public and occupational exposure, were recorded by means of a magnetic field probe analyzer. The worst-case scenario for instantaneous physical direct and indirect effects was identified. Measurements within the frequency range of 25 Hz-2 kHz revealed localized magnetic flux density peaks above 100 μT at the 50 Hz frequency in three out of five chargers, registered in close proximity during the recharge. Beyond this distance, exposure indices were recorded showing values below 50% of reference levels. ncbi.nlm.nih.gov

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionunclear
PopulationNot supplied
Sample size5
ExposureELF
Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

Magnetic field measurements from five DC fast-charging devices (recharge and standby) in the 25 Hz–2 kHz range found localized magnetic flux density peaks above 100 µT at 50 Hz in three of five chargers when measured in close proximity during recharge. At greater distances, exposure indices were below 50% of the applicable reference levels.

Outcomes measured

  • Magnetic field spectrum and amplitude (magnetic flux density)
  • Exposure indices vs guidelines for general public and occupational exposure
  • Worst-case scenario for instantaneous physical direct and indirect effects

Limitations

  • No human health outcomes assessed (exposure measurement study only)
  • Measurement results reported for five chargers only
  • Details on measurement distances/geometry and standby-condition results not provided in the abstract
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "DC fast charging columns (electric vehicle chargers)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": 5,
  "outcomes": [
    "Magnetic field spectrum and amplitude (magnetic flux density)",
    "Exposure indices vs guidelines for general public and occupational exposure",
    "Worst-case scenario for instantaneous physical direct and indirect effects"
  ],
  "main_findings": "Magnetic field measurements from five DC fast-charging devices (recharge and standby) in the 25 Hz–2 kHz range found localized magnetic flux density peaks above 100 µT at 50 Hz in three of five chargers when measured in close proximity during recharge. At greater distances, exposure indices were below 50% of the applicable reference levels.",
  "effect_direction": "unclear",
  "limitations": [
    "No human health outcomes assessed (exposure measurement study only)",
    "Measurement results reported for five chargers only",
    "Details on measurement distances/geometry and standby-condition results not provided in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "low-frequency magnetic fields",
    "ELF",
    "magnetic flux density",
    "DC fast charging",
    "electric vehicle charging",
    "25 Hz-2 kHz",
    "50 Hz",
    "exposure indices",
    "general public guidelines",
    "occupational exposure guidelines"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.6,
      "reason": "Exposure indices were evaluated against occupational exposure guidelines."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.22254
PubMed: Not supplied

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