ALEXANDRIA, Va., March 26 -- United States Patent no. 12,261,554, issued on March 25, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).
"Motor controller and motor controlling method" was invented by Yasuaki Sato (Hitachinaka, Japan), Keisuke Suzuki (Hitachinaka, Japan), Katsuhiro Hoshino (Hitachinaka, Japan) and Hideki Sekiguchi (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a motor controller that can estimate the magnetic flux of a magnet without changing a current of an electric motor. A motor controller 1 includes a current detecting unit 15 that detects a current of an electric motor 5, a current stability determining unit 10 that determines whether or not a curr...