This paper proposes modern approaches for traction inverter concepts in the range of 100 kW/l and more. The development process of a traction inverter with an output power of 80 kW is used to present the results. The paper addresses the realization of cylindrical inverter assemblies for the direct integration into the frame of electrical machines. With the developed 3D-printed embedded cooling system, the concept ensures a very small and compact design. Volume minimization automatically leads to short electrical power lines and small loops guaranteeing a low inductive system. The simultaneous use of electrolyte capacitor technology and the application of silicon power semiconductors shows that common technologies are still in demand. Within the framework of the paper, the innovative strategic approaches for cost-efficient miniaturization of entire inverter concepts as well as the technologies to increase the efficiency are presented.
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