Fraunhofer Energy AllianceA highly compact inverter has been developed at Fraunhofer ISE for an uninterrupted power supply (UPS) with an efficiency of up to 98.7 %. Using silicon carbide (SiC) transistors, a design with a power of 10 kW and a volume of only 5 l was realized.
The degree of efficiency is particularly important for the application in so-called online UPS systems, as they do not only compensate short-term voltage dips in the grid, but also supply the consumer permanently via the UPS. The research and development results can also be applied to other areas of power-electronics energy conversion, where weight and efficiency play a key role.