ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,732,039, issued on Sept. 8, was assigned to Siemens AG (Munich).
"Dynamoelectric rotary machine" was invented by Rolf Vollmer (Gersfeld, Germany) and Reiner Seufert (Salz, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dynamoelectric rotary machine includes a stator with a stator winding and a rotor. The rotor includes an at least substantially cylindrical recess for receiving a shaft. The rotor includes a first material and a second material, wherein a region of the rotor in which a d-axis flux path of a magnetic flux lies is formed of the first material. The flux path caused by a magnetic stator field that can be generated by the stator wind...