ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,490, issued on Oct. 7, was assigned to Nabtesco Corp. (Tokyo).
"Motor drive system" was invented by Yasuo Ono (Tokyo), Kazuhito Nakamura (Tokyo), Michael Haider (Zurich), Dominik Bortis (Zurich), Miric Spasoje (Zurich) and Walter Johann Kolar (Zurich).
According to the abstract* released by the U.S. Patent & Trademark Office: "A motor drive system includes: a first inverter connected to one end of an open-end winding of a three-phase motor, an input voltage from a single-phase AC power source being rectified into a rectified voltage and input to the first inverter; a second inverter connected to another end of the open-end winding and including a DC link capacitor; and a control u...