US Patent Issued to Andreas Stihl on March 3 for "Method for operating a permanently excited synchronous motor of a hand-held working device, and hand-held working device" (German Inventors)

ALEXANDRIA, Va., March 3 -- United States Patent no. 12,567,819, issued on March 3, was assigned to Andreas Stihl AG & Co. KG (Waiblingen, Germany).

"Method for operating a permanently excited synchronous motor of a hand-held working device, and hand-held working device" was invented by Simon Dietrich (Waiblingen, Germany), Jan Lukas Jackenkroll (Waiblingen, Germany) and Christian Eberle (Korb, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for operating a permanently excited synchronous motor of a hand-held working device includes the steps of: sensorlessly determining a position variable representative of a position of a rotor of the synchronous motor at a standstill; determining a directi...