ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,843, issued on June 17, was assigned to TMEIC Corp. (Chuo-ku, Japan).
"Drive system and control method" was invented by Takumi Ito (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drive system of an embodiment includes an initial phase command generation unit, a rotor phase detection unit, and a drive control unit. The initial phase command generation unit generates a phase command value corresponding to an initial phase of a rotor before startup of a synchronous motor. The rotor phase detection unit detects a phase of the rotor and outputs the phase. The drive control unit controls the driving of the synchronous motor by using the phase comm...