ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,049, issued on June 2, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).
"Control device for converter" was invented by Takeshi Okamoto (Tokyo), Hiroyuki Enokijima (Tokyo) and Yasushi Otsuka (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a control device, a phase corrector corrects an error in a phase of an AC power supply detected by a phase detector. A current coordinate transformer transforms detected values of three-phase currents of a converter into dq-axes currents using the corrected phase. A current controller calculates a voltage command so that current commands of the converter and the dq-axes currents match each other. A voltage...