Patent ID: 9203323
Filing Date: 2015-12-01
Classification: H02J,H02M

Abstract:
1. An on-line uninterruptible power supply for supplying power to an external AC load comprising; a positive DC source, a negative DC source, an AC source, an inductor and an arrangement of semiconductor switches, wherein each of said positive DC source, said negative DC source, said AC source and said external AC load have first and second terminals, wherein the second terminal of each of said positive DC source, said negative DC source, said AC source and said external AC load are coupled to an arbitrary neutral point, wherein DC source adjectives positive and negative refer to DC voltage potentials with respect to said arbitrary neutral point and wherein said arrangement of semiconductor switches provide a means for selectively coupling the first terminal of each of said positive DC source, said negative DC source or said AC source to a first terminal of said inductor and wherein a second terminal of said inductor is coupled to first terminal of said external AC load.