Home » Delphi Technologies for offering the first volume-production 800-V inverter for double the EV charging speed
Delphi Technologies says it is the first in the industry with volume production of an 800-V silicon carbide (SiC) inverter, a key component of next-generation electrified vehicles. The new inverter enables conversion of DC (direct current) to AC (alternating current) in electrical systems up to 800 V. The upgrade promises to significantly extend electric vehicle (EV) range and halve charging times compared to 400 V systems—helping alleviate consumer doubts about EVs and potentially speeding their adoption. The new Delphi offering, which supports multi-voltage platforms, is an evolution of the company’s high-voltage inverter and uses silicon carbide MOSFET (metal-oxide semiconductor field-effect transistor) wide bandgap technology. The company is partnering with Cree, using its Wolfspeed silicon carbide-based MOSFETs. Another key component of the new inverter is a patented Viper power switch, which combines high levels of integration with double-sided cooling for inverters that are 40% lighter and 30% more compact than competing offerings. The latest addition to the Viper power switch range replaces conventional silicon with silicon carbide, a high band gap semiconductor that allows very fast switching, and can operate at even higher temperatures. The faster switching alone will allow faster, more compact, and lighter motors that offer great efficiency and greater range; that’s in addition to the many benefits of moving to 800 V. The new power switch fits into the same inverter package as the current silicon switch, reducing engineering costs associated with a technology change and simplifying the design of multiple vehicle performance options. The company says it recently secured a $2.7 billion order for volume production of the 800-V technology over eight years with a global OEM. Launch is expected in 2022, initially for a high-performance vehicle operating at up to 800 V.
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