# Commission Implementing Decision (EU) 2020/728 of 29 May 2020 on the approval of the efficient generator function used in 12 volt motor-generators for use in certain passenger cars and light commercial vehicles as an innovative technology pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council (Text with EEA relevance), Division 3: DETERMINATION OF THE EFFICIENCY

Extent: E+W+S+N.I.

The motor-generator efficiency shall be determined in accordance with ISO 8854:2012, with the exception of the elements specified in this point.
Evidence shall be provided to the Secretary of State that the speed ranges of the 12 volt motor-generator are consistent with those set out in Table 1. The measurements shall be conducted at different operating points, as set out in Table 1. The current intensity of the motor-generator shall be defined as half of the rated current for all operating points. For each speed the voltage and the output current of the motor-generator shall be kept constant at 14,3 volt.
Table 1
Operating pointi
Holding time[s]
Rotational frequency
Frequencyhi
1
1 200
1 800
0,25
2
1 200
3 000
0,40
3
600
6 000
0,25
4
300
10 000
0,10
The efficiency at each operating point shall be calculated in accordance with the following Formula 1.

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Source: https://www.legislation.gov.uk/eudn/2020/728/annex/division/3 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-728/annex/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.