ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,237,799, issued on Feb. 25, was assigned to HAMILTON SUNDSTRAND Corp. (Charlotte, N.C.).
"Electric motor control" was invented by Andrei Dinu (Leicester, Great Britain), Stefanos Skoulaxinos (Cannock, Great Britain) and Jonathan Mark Roadley-Battin (Birmingham, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of operating electric motor systems that comprise electric motors comprising a rotor having a magnet mounted thereto. The electric motor is initially operated in an open loop mode in which the rotor angle is estimated based on the input voltage frequency. Once the motor is running at sufficient speed, a transition to closed loop...