US Patent Issued to GM Global Technology Operations on Jan. 28 for "Method and system to suppress tonal noises over a wide speed range in alternating current electric machines" (Michigan Inventors)

ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,212,190, issued on Jan. 28, was assigned to GM Global Technology Operations LLC (Detroit).

"Method and system to suppress tonal noises over a wide speed range in alternating current electric machines" was invented by Vinod Chowdary Peddi (Shelby Township, Mich.) and Song He (Troy, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method to suppress tonal noises over a wide speed range in an alternating current electric machine by current injection and voltage injection is provided. The method includes, within a computerized processor, monitoring a position sensor measuring a current electric machine frequency of the electric machine, comparing the ...