US Patent Issued to Hitachi Astemo on Nov. 25 for "Synchronous motor driving device and synchronous motor driving method" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,483,169, issued on Nov. 25, was assigned to Hitachi Astemo Ltd. (Hitachinaka, Japan).

"Synchronous motor driving device and synchronous motor driving method" was invented by Hiroaki Sato (Tokyo), Daisuke Goto (Hitachinaka, Japan) and Katsuya Iwasaki (Hitachinaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A synchronous motor driving device which accurately estimates and limits direct current (DC), without a dedicated current detection sensor. The device includes a first DC calculation unit that calculates a first DC based on a first voltage command value, a current value of a winding of a synchronous motor, and a battery voltage; a second DC c...