ALEXANDRIA, Va., March 26 -- United States Patent no. 12,261,555, issued on March 25, was assigned to TECO ELECTRIC & MACHINERY Co. LTD. (Taipei, Taiwan).
"Motor current optimization control method and system" was invented by Chih-Hung Hsiao (Taipei, Taiwan) and Hsien-Lai Yu (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a motor current optimization control method and system, while the motor runs steadily at a set speed, one d-axis current command value of the input current is set to 0. Then, the d-axis current command value is step-wisely increased by an increment at least twice. At least three real-time feedback current values can be collected from detecting a feedback current of an AC p...