US Patent Issued to GM Global Technology Operations on May 27 for "Torque ripple compensation with rotor pocket notches in multi-layer synchronous machines" (Michigan Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,316,178, issued on May 27, was assigned to GM Global Technology Operations LLC (Detroit).

"Torque ripple compensation with rotor pocket notches in multi-layer synchronous machines" was invented by William R. Jensen (Walled Lake, Mich.), Mazharul Chowdhury (Canton, Mich.) and Jay Jihyun Kim (Rochester Hills, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Aspects of a synchronous electric motor, including a synchronous interior permanent magnet or a synchronous reluctance motor, are disclosed. The outer edges of pockets and magnet pockets, including flux barriers, selectively include one or more notches at the front of the pockets. The use of these ...