ALEXANDRIA, Va., July 30 -- United States Patent no. 12,374,947, issued on July 29, was assigned to NORTH CAROLINA STATE UNIVERSITY (Raleigh, N.C.).

"Torque density and efficiency improvement in AC machines" was invented by Md Sariful Islam (Raleigh, N.C.), Adeeb Ahmed (Raleigh, N.C.) and Iqbal Husain (Raleigh, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Various examples related to stator and rotor configurations for the improvement in torque density and/or efficiency in AC machines are presented. In one example, a bar wound stator includes a stator core with winding slots; a first group of bar type conductors in the winding slots adjacent to a proximal end adjacent to a rotor air gap surface of the ...