US Patent Issued to MINEBEA MITSUMI on March 18 for "Motor controller, motor system and method for controlling motor" (Japanese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,558, issued on March 18, was assigned to MINEBEA MITSUMI Inc. (Nagano, Japan).

"Motor controller, motor system and method for controlling motor" was invented by Reiji Yamasaki (Nagano, Japan) and Toshiki Kimura (Nagano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A motor controller includes an observer that estimates a Gamma-axis electromotive force and a Delta-axis electromotive force, during an idle time of a rotor of a motor. The motor controller includes a derivation unit that derives a phase difference between dq axes and GammaDelta axes, from the Gamma-axis electromotive force and the Delta-axis electromotive force. The motor control...