{
  "url": "https://openlegislation.uk/eu-decision-2019-313/annex/division-4/division-4.1",
  "json_url": "https://openlegislation.uk/eu-decision-2019-313/annex/division-4/division-4.1.json",
  "legislation": "eudn/2019/313",
  "legislation_title": "Commission Implementing Decision (EU) 2019/313 of 21 February 2019 on the approval of the technology used in SEG Automotive Germany GmbH High efficient 48V motor generator (BRM) plus 48V/12V DC/DC converter for use in conventional combustion engine and certain hybrid powered light commercial vehicles as an innovative technology for reducing CO2 emissions from light commercial vehicles pursuant to Regulation (EU) No 510/2011 of the European Parliament and of the Council (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2019-313",
  "path": "annex/division/4/division/4.1",
  "kind": "division",
  "number": "4.1",
  "heading": "Efficiency of the 48V motor generator plus the 48V/12V DC/DC converter",
  "text": "The efficiency of the 48V motor generator plus the 48V/12V DC/DC converter shall be determined in accordance with ISO 8854:2012, with the exception of the elements specified in this section.\nEvidence shall be provided to the type approval authority that the speed ranges of the efficient 48V motor generator are consistent with those set out in Table 1.\nThe measurements shall be conducted at different operating points, as set out in Table 1. The efficient 48V motor generator plus the 48V/12V DC/DC converter current intensity shall be defined as half of the rated current of the 48V/12V DC/DC converter for all operating points.\nThe rated current of the 48V/12V DC/DC converter is defined as the output nominal power of the 48V/12V DC/DC converter divided by 14,3 V. The nominal power of the 48V/12V DC/DC converter shall be the continuous output power at the 12V side guaranteed by the manufacturer of the DC/DC converter at the conditions specified in the ISO 8854:2012.\nFor each speed the voltage and the output current of the motor generator shall be kept constant, the voltage at 52 V.\nThe efficiency at each operating point shall be calculated in accordance with Formula 12:\nFormula 12\nη TOT i = 60 × U i × I i 2π × M i × n i × 100 All efficiency measurements are to be performed consecutively at least five (5) times. The average of the measurements at each operating point ( η TOT i – ) shall be calculated.\nThe efficiency of the generation function (ηTOT) shall be calculated in accordance with Formula 13:\nFormula 13\nη TOT = ∑ i = 1 4 h i × η TOT i – The measurement set up has to allow the measurement of the 48V motor generation efficiency alone.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2019/313/annex/division/4/division/4.1",
    "retrieved_at": "2026-11-01T15:12:49.186939+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}