ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,744,481, issued on Sept. 22, was assigned to Schneider Toshiba Inverter Europe SAS (Pacy sur Eure, France).
"Determining a permanent magnet flux state" was invented by Rashad Ghassani (Toulouse, France) and Mohamad Koteich (Vernon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Examples include a method for determining a permanent magnet flux state of a rotor in a synchronous motor using a VSD. The method includes obtaining d-axis and q-axis inductance values of the motor, fixing a non-zero stator current magnitude and controlling a motor speed using a speed loop regulation in a stator current angle Gamma polar coordinate frame to reach a zero m...