New HybridPACKTM HD – Key to Reliable Highest Performance eTRUCK Inverters for Heavy-Duty Operation

Inhalt:
This paper presents design requirements and solution strategies for power-semiconductor modules targeting traction converters for electric trucks. It is shown that, due to the needed high-load, long-distance mission profiles, robustness against cycling load, i.e., device lifetime, is the main differentiator to consider. For optimized efficiency and reduced module-package size, a low-inductive, direct-liquid cooled power-module design with SiC MOSFETs is proposed. To achieve competing design targets, the fundamental elements are total drain-source resistance, joining technology, and heat spreading. Especially, joining technology and heat spreading are the key parameters for a power module with optimized cost-performance ratio.