ALEXANDRIA, Va., June 4 -- United States Patent no. 12,323,018, issued on June 3, was assigned to OKUMA Corp. (Aichi, Japan).
"Three-phase induction motor" was invented by Motozumi Yura (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a three-phase induction motor, each of coils of three phases has a first coil unit and a second coil unit placed in 180-degree symmetry, each of the coil units has a first coil and a second coil, the first coil is formed by winding a winding once in an electrical angle range of 180 degrees during a two-pole operation, the second coil is formed by winding the winding twice in a range of a center third when the first coil is equally divided into three parts in a ci...