ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,776,735, issued on Oct. 27.
"Power conversion device and control method" was invented by Yoshiyasu Takase (Fukuoka, Japan), Akira Yamazaki (Fukuoka, Japan), Yasumasa Hamabe (Fukuoka, Japan) and Takahiro Saeki (Fukuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power conversion device includes: power conversion circuitry configured to supply drive power to an induction motor; and control circuitry configured to: generate a torque command; correct the torque command, in response to determining that a magnitude of a primary frequency of the induction motor is less than a lower limit level, so that the magnitude of the primary frequency approac...