Solid state SiC fast charger runs up to 400kW
Delta Electronics has developed a solid state transformer (SST) with silicon carbide MOSFETs in a 400kW extreme fast charger for electric vehicles.
The charger delivers up to 500A with an efficiency of 96.5% and was shown charging an electric Hummer from programme partner General Motors. Delta also worked with DTE Energy, NextEnergy, Virginia Tech’s Centre for Power Electronics Systems (CPES) and the American Centre for Mobility.
The 400kW fast EV charger provides 1000V/400A, 500A below 800V using a three-phase 13.8 kVac medium voltage SiC MOSFET SST topology. This cuts the weight of the charger by 75%.
The SST design, started in 2018, also offers essential capabilities for smart grid applications, such as reactive power compensation for voltage stabilization and improved power quality.
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Delta’s Automotive VP Charles Zhu and GM’s Senior Manager New Battery Engineering Jim Khoury recharge a GMC Hummer EV with the 400kW Extreme Fast Charger.
The HVDC power architecture also enables connection with renewable energy and energy storage systems (ESS) to lighten the impact on the electricity grid during times of high EV charging demand. The design was developed at the Delta Americas’ automotive R&D centre in Livonia, MI and at the Delta Power Electronics Lab inside the North Carolina Research Triangle Park in Raleigh, NC.
“By combining our joint prowess in energy management, e-mobility and R&D, we are building the EV charging infrastructure of the future,” said Kelvin Huang, President of Delta Electronics (Americas).
“We appreciate the opportunity to participate in the development of Delta’s advanced charging system,” said Tim Grewe, director of Electrification Strategy at GM. “The results are encouraging, and we look forward to continued collaboration as we work toward an all-electric future.”
“Extreme fast charging will accelerate the adoption of electric vehicles, bringing us closer to a cleaner energy future,” said Richard Mueller, DTE Energy Technology, Standards and Interconnection manager. “A key aspect of the new technology is the ability to connect directly to medium voltage distribution and provide faster, more efficient charging compared to lower voltage chargers. This project will give DTE and its project partners significant insight into how these fast chargers can be integrated safely, reliably and with ever growing numbers into the grid.”
“NextEnergy is proud to support Delta Electronics and partners to provide the siting analysis and facilitate the initial testing of the extreme fast charger. Commercializing new charging technology will address range anxiety and accelerate the adoption of EV’s to meet our climate and environmental goals,” said Jim Saber, CEO of NextEnergy.
“We need to get to higher power charging so that EV owners get the best refueling experience and can get to where they are going faster.” said Reuben Sarkar ACM CEO, “Delta’s 400 kW extreme fast charger, enabled by ACM’s power infrastructure, is showcasing what the future has in store for EV charging.”
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