ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,671, issued on May 26, was assigned to HANGZHOU CITY UNIVERSITY (Hangzhou, China).

"Method and system for simultaneously realizing current sampling gain and delay compensation" was invented by Feifan Ji (Hangzhou, China), Yanjun Li (Hangzhou, China) and Qingyu Song (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a system for simultaneously realizing current sampling gain and delay compensation. A dummy load is formed from three-phase inductors with star connection to replace a motor load, and a dummy rotation angle is generated by software. In a calibration mode, a standard current sampling element is used for current sam...