Performance and Feature Benchmarking of SiC Trench Technologies and Cooling Systems for DSC Modules in Traction Inverters

Abstract:
This paper explores a relevant subset of the trade-offs involved in selecting power modules for traction inverters of electric vehicle drivetrains. The discussion proceeds with the example of two Silicon Carbide (SiC) MOSFET generations, the Double Side Cooled (DSC) frameless molded power module, and two DSC-specific cooler systems. Conflicting objectives such as product performance, system performance, ease of integration, and low costs demand a differentiated analysis of product features and their benefits. Hence, we discuss the impact of SiC Generation 1 and tailored SiC Generation 2 "Performance" on inverter efficiency and performance, followed by a comparison of two high-performance cooling systems using three DSC power modules. Finally, we examine potential system cost implications that can inform the selection of an appropriate cooler system for a given application. The paper is part of a three-publication series, with the previous two focusing on technical details for both cooling systems.