Enhancing performance through significant reductions in size and weight
ROHM has announced that will provide the full SiC power modules to the VENTURI Formula E team in the FIA Formula E 2017–2018 (season four), the leading racing event for electric vehicles starting on 2nd and 3rd of December in Hong Kong. This module will support further improvements in the car’s performance under racing conditions. As the leading developer of SiC power devices, ROHM became VENTURI’s official technology partner in season 3, and provides the world’s most advanced SiC power devices used in the inverter, which is the core of the electric vehicle powertrain.
The inverter for season four features embedded full SiC Power module, making it 43% smaller and 6 kg lighter than the inverter for season two.
ROHM will continue making technological advancement in power devices, contributing to the development of society.
Formula E is an all-electric-powered FIA (Fédération Internationale de l’Automobile) championship that began in 2014. The series has expanded to cities around the world which has to date included cities such as Hong Kong, Berlin and New York. By not using fossil fuels Formula E champions a clean environmental approach. The key to victory in this racing series for the drivers is to use power as efficiently as possible by getting the maximum performance out of the stored energy. The advancement in Formula E technology is expected to filter through to developments in general-use electric vehicles. Although this motorsports event is still in its infancy, it already enjoys the participation of automotive manufacturers from around the world. Major automobile manufacturers including those from Japan have also declared their intention to take part in Formula E. For many years, ROHM has provided a highly varied lineup of products designed for automotive use. These include power supply ICs, various control ICs, along with discrete products such as power devices, current detection shunt resistors. ROHM is pushing forward with the latest cutting-edge development of SiC power devices, which are expected to realize dramatic loss reductions compared to conventional Si (silicon) power devices. These power devices will be used more and more on electric vehicle (EV) motors and inverters.
The Advantage by Using SiC Products
The SiC power module used in the inverter of the VENTURI Formula E team racing car achieves a large power throughput. This is due to the development of a new package with an improved internal module structure, as well as optimized thermal management.
Compared to conventional IGBT modules with similar current ratings, this module reduces switching losses by 75% (at a chip temperature of 150°C). This contributes to the energy efficiency for the whole application. Also, the high frequency drive facilitates the use of smaller peripheral components. This, as well as the effect of reductions in switching losses contributes to a more compact cooling system.
By using this full SiC power module in the inverter section (the powertrain core), the inverter is 43% smaller and 6kg lighter than the version used in season two. Even compared to the previous inverter used in season three, it is 30% smaller and 4kg lighter.
About Formula E
Held since 2014, the Formula E is the world’s first formula championship for electric cars, and is organized by the ‘FIA’ (Fédération Internationale de l’Automobile), the organization responsible for the Formula One World Championship (F1) and the World Rally Championship (WRC). This event serves as a proving ground for the research and development of electric vehicles, and stimulates social interest in these cars.
Compared with conventional motorsports in which cars with internal combustion engines compete, the Formula E uses solely electrically-driven cars with very little drive noise and no emissions. Because of this, the races can be held on public courses in urban areas. Season four of the Formula E will open in December 2017 in Hong Kong, and races are planned to be held in Marrakesh, Santiago, Mexico City, São Paulo, Rome, Paris, Berlin, Zurich, New York and Montreal, for a total of eleven venues.
About VENTURI Formula E Team
VENTURI Automobiles is a pioneer in designing electric powertrains and has been systematically pursuing a sustained electric vehicle innovation policy since 2000. VENTURI develops the most advanced technologies available for extreme-performance electric powertrains. In 2013, VENTURI Automobiles entered the FIA Formula E series under the VENTURI Formula E Team name and became an FIA-approved manufacturer in 2015. VENTURI Automobiles supplies full powertrain systems for the VENTURI Formula E Team. VENTURI Automobiles holds the FIA World Land Speed record for an all-electric vehicle. In 2016, the VENTURI Buckeye Bullet 3 set the official top recorded speed achieved by an electrically-driven car of 549 km/h on the Bonneville Salt Flats in Utah.
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