... required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Solid-state inverters have no moving ... are used in a wide range of applications, from small switching power supplies in computers, to large electric utility high-voltage direct ... frequency online UPS from 1KVA to 10 KVA3, Inverters with 48v, 110v, and 220v,4, Electric exclusive UPS;5, Rackmounte ...