Improved Efficiency and Power Density in EV Inverter Design Using a Novel SiC Power Module with Enanched Direct-cooled Inverter (EDI)

The paper presents how the Marelli in-house designed and built, ultra-compact SiC (Silicon Carbide) Power Module with direct cooled substrate can contribute to the realization of an inverter with outstanding power density and efficiency. After presenting the unique characteristics of SiC devices when compared to standard Si when it comes to high-current, high-efficient applications, we will then address the challenges of building and producing a compact, high-current capable power module using direct substrate cooling. Finally, we will present the design and validation results for the implementation of an inverter built with this technology and driving a high-speed motor.