ALEXANDRIA, Va., June 2 -- United States Patent no. 12,646,947, issued on June 2, was assigned to LG INNOTEK Co. LTD. (Seoul, South Korea).
"Power conversion device having multi-level structure" was invented by Jeong Heum Park (Seoul, South Korea) and Kwang Soon Jung (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power conversion device according to one embodiment of the present invention comprises: a plurality of converters comprising at least one upper switch and at least one lower switch, and respectively connected to a plurality of cell strings; and an auxiliary power supply unit for supplying driving power to each of the plurality of converters, wherein the auxiliary power supply u...