Marelli presents 800 V SiC inverter platform
Due to its performance at high temperature and high voltage – enabling smaller, lighter and more efficient solutions – Silicon Carbide is regarded as a technology of choice for power electronics. Thus, it is particularly suitable for inverters, which convert DC from batteries to AC used in electric vehicles’ motors. In addition to this, Marelli’s new 800 Volt inverter platform also features an optimised thermal structure, thanks to innovative structural and cooling channel designs that drastically reduce the thermal resistance between the SiC components themselves and the cooling liquid.
Among the main advantages, the inverter platform can extract more energy from the battery at a higher efficiency and secure a significant increase in the driving range of a vehicle. It also ensures faster charging times and better acceleration. Finally, a smaller and more efficient inverter allows a reduction in battery size which delivers cost, weight and sustainability benefits.
“The new inverters platform based on our 800 Volt Silicon Carbide power module technology allows to serve applications where energy use is optimized, the performance is maximized and efficiency is dramatically improved” said Dr. Razvan Panati, Head of Power Electronics Technology of Marelli’s Vehicle Electrification Division. “With a complete range of modular solutions, we are able to offer to our customers more flexibility in terms of packaging, cooling system design and energy storage.”
The software for all the inverters in Marelli’s range is developed in-house by the company and is hosted by an Electric Control Unit located in the same inverter case. The software is compliant with Autosar standards and specifically customized for the diagnostic standards required by car makers. Functional Safety requirements are compliant to ASIL D.
The platform completes the inverters range offered by Marelli that includes also 400 Volt solutions based both on IGBT (Insulated Gate Bipolar Transistor) and Silicon Carbide, and Gallium Nitride (GaN)-based converters in development.
The inverters range is part of the solutions Marelli is showcasing at its booth at the 22nd edition of the International VDI Congress “Dritev”, one of the largest industry events in Europe in the field of drivetrain and transmission, held in Baden-Baden (Germany) on July 6th and 7th. At the congress, the company exhibited its portfolio of technologies for vehicle electrification, that includes a selection of components and subsystems, up to solutions for the complete integrated vehicle energy management system, applying a “tier 0.5” approach, with the integration of thermal management into the electric powertrain.
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