6500V-100A SiC JFET-Based Half-Bridge Module Navy SBIR FY2016.1 Sol No.: Navy SBIR FY2016.1 Topic No.: N161-066 Topic Title: 6500V-100A SiC JFET-Based Half-Bridge Module Proposal No.: N161-066-0533 Firm: United Silicon Carbide, Inc 7 Deer Park Drive Suite E Monmouth Junction, New Jersey 8852 Contact: Xueqing Li Phone: (732) 355-0550 Web Site: http://www.unitedsic.com Abstract: Over the last decade, tremendous efforts have been invested in developing high voltage SiC power switches. At present, SiC unipolar power switches including MOSFETs and normally-on JFETs have been commercially available at voltage ratings up to 1700V. However, medium voltage (>3300V) SiC power devices are still not commercially available mainly because of the very high cost of high quality medium-voltage SiC epi-wafers. There is a strong need for a cost-effective medium-voltage SiC power switch that can be commercialized and moved into mass production quickly. In this program, United Silicon Carbide, Inc. (USCi) proposes to develop such a 6.5kV SiC power module based on the technology of series-connecting multiple commercial available low-voltage (1,200V to 1,700V) SiC normally-on JFETs. The proposed approach has substantial performance advantages over the medium-voltage SiC MOSFET solution. For example, the proposed approach has a higher threshold voltage (>3V at 150�C) providing higher noise immunity, can be driven by a conventional gate driver for ease to use, and has an excellent built-in antiparallel diode with a knee voltage of only 0.7V. Benefits: The proposed medium-voltage SiC power switch module exploits all the material advantages of SiC technology, such as high voltage, high frequency and high temperature operations, in a most cost-effective way, allowing quick widespread penetration of SiC technology into next generation high-performance and high-power density multi-megawatt power electronic converters for future Navy all-electric warship propulsion motor drives and shipboard power distribution. The applications of the proposed SiC power module also include high voltage motor drives and traction systems, high-voltage pulse generators, high-voltage dc transmission systems (HVDC), flexible ac transmission systems (FACTS), wind and solar inverters, and energy storage & management, etc. Return