In a soon to be net zero future, renewable energy generation, electric personal cars as well as commercial vehicles, aircraft with battery-electric drive systems and ships with electric engines will soon dominate the landscape. At the same time, generators in wind turbines are essential in renewable energy generation.
Because of the urgent need for effective energy conversions this paper shows how to achieve better efficiency determination of electric motors and generators by a better cross-connection of mechanical and electrical side to further reduce the total measurement uncertainty of electrical machines. Thus, it may be interesting to everybody who needs to measure efficiency maps and improve measurement uncertainties of the results.