Referent: Eckart Hoene, Chief Expert Power Electronics, Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration IZM
Designing an automotive traction inverter with highest power density requires in deep investigation of thermal behavior and optimizing it. In this presentation an implementation will be shown, which compromises power modules based on embedding technology on ceramic as well as capacitors using polyacrylate dielectric. The geometric implementation allows to cool the capacitor with the same cooling duct as the semiconductors, which is necessary due to the capacitor´s higher dielectric losses. The DC link bus bar is implemented as PCB, a comprehensive simulation of current flow directions and ohmic losses ensures the thermal stability. The deep insight into all design aspects shall trigger inspiration of new ideas for the attending engineers.
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