With the extensions of (EC) 640/2009 for the environmentally friendly design of electric motors, the use of IE3 and IE4 motors becomes concrete in certain areas of application: In two steps - by July 1, 2021 and July 1, 2023. In addition, the scope of the regulation was expanded. Our new white paper explains how these requirements can be easily adapted and how this can be used to successfully increase the energy efficiency of the drive system.