Division 3.1 Saved mechanical power

The difference [W] between the saved mechanical power when using the 48V motor generator combined with the 48V/12V DC/DC converter under real-world conditions and the saved mechanical power when using the 48V motor generator combined with the 48V/12V DC/DC converter under type-approval conditions shall be calculated in accordance with Formula 5.

Formula 5

where

shall be calculated in accordance with Formula 6 and in accordance with Formula 7.

Formula 6

Formula 7

where,

is the efficiency of the 48V motor-generator combined with the 48V/12V DC/DC converter, as determined in point 2.3 [%]

is the power requirement under ‘real-world’ conditions, which is 750 W

is the power requirement under ‘type-approval’ conditions, which is 350 W

is the efficiency of the baseline alternator, which is 67 %