US Patent Issued to Allegro MicroSystems on Aug. 26 for "Low acoustic noise open loop motor startup" (Italian, British Inventors)

ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,303, issued on Aug. 26, was assigned to Allegro MicroSystems LLC (Manchester, N.H.).

"Low acoustic noise open loop motor startup" was invented by Simon Kalombo (Rozzano MI, Italy), Emanuele Gallazzi (Milan), Masahira Kurihara (Edinburgh, Great Britain) and Andrea Foletto (Andorno Micca, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and apparatus for motor startup with reduced acoustic noise include a startup module to generate a startup d-axis voltage during a startup interval and a startup q-axis voltage during the startup interval, wherein the startup interval ends at a time based on the observer error, and wherein the startup q-axi...